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2011 RESTRAINTS

Supplemental Restraint System (Diagnostic Codes & Symptom Tests) (Hybrid) Highlander

AIRBAG SYSTEM

DTC B1000/31: Center Airbag Sensor Assembly Malfunction

DESCRIPTION

The center airbag sensor assembly consists of a deceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc.

If the center airbag sensor assembly receives signals from the deceleration sensor, it determines whether or not the airbag squib and pretensioner squib should be activated.

DTC B1000/31 is recorded when a malfunction is detected in the center airbag sensor assembly.

DTC No. DTC Detection Condition Trouble Area
B1000/31 Center airbag sensor assembly malfunction Center airbag sensor assembly

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK DTC
    1. Check for DTCs, refer to DTC CHECK / CLEAR .

      RESULT
      Result Proceed to
      DTC B1000/31 is output A
      DTC B1000/31 and other DTCs are output B

      NOTE:

      If only DTC B1000/31 is output, do not clear the DTCs, replace the center airbag sensor assembly.

      HINT:

      If any DTCs other than DTC B1000/31 are also output, troubleshoot those DTCs first.

    B -->See step 3

    A --> See step 2

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART

DTC B1603/83: Front Satellite Sensor Bus RH Initialization Incomplete; DTC B1612/83: Lost Communication with Front Airbag Sensor RH; DTC B1613/83: Front Airbag Sensor RH Initialization Incomplete

DESCRIPTION

The front airbag sensor RH circuit consists of the center airbag sensor assembly and front airbag sensor RH.

The front airbag sensor RH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the front airbag sensor RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1603/83
B1612/83
B1613/83
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor RH circuit.
  • Front airbag sensor RH malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor RH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 1: Front Airbag Sensor RH- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and front airbag sensor RH. Also check that the connectors that link the engine room main wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly and front airbag sensor RH. Also disconnect the connectors that link the engine room main wire and instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (OPEN)
    1. Connect the connectors that link the engine room main wire and instrument panel wire.

      Fig. 2: Identifying Front Airbag Sensor RH Circuit (OPEN)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 29 (+SR) and 27 (-SR) of connector B.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A33-2 (+SR) - A33-1 (-SR) Always Below 1 ohms

    NG --> See step 7

    OK: Go to next step

  3. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT)
    1. Disconnect SST from connector B.

      Fig. 3: Identifying Front Airbag Sensor RH Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A33-2 (+SR) - A33-1 (-SR) Always 1 Mohms or higher

    NG --> See step 8

    OK: Go to next step

  4. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 4: Identifying Front Airbag Sensor RH Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A33-2 (+SR) - Body ground Ignition switch ON Below 1 V
      A33-1 (-SR) - Body ground Ignition switch ON Below 1 V

    NG --> See step 9

    OK: Go to next step

  5. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 5: Identifying Front Airbag Sensor RH Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A33-2 (+SR) - Body ground Always 1 Mohms or higher
      A33-1 (-SR) - Body ground Always 1 Mohms or higher

    NG --> See step 10

    OK: Go to next step

  6. CHECK FRONT AIRBAG SENSOR RH
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 6: Identifying Front Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the front airbag sensor LH with the front airbag sensor RH and connect the connectors to them.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1603/83, B1612/83, B1613/83, B1608/84, B1617/84 and B1618/84 are not output. A
      DTC B1608/84, B1617/84 or B1618/84 is output. B
      DTC B1603/83, B1612/83 or B1613/83 is output. C

      HINT:

      Codes other than DTCs B1603/83, B1612/83, B1613/83, B1608/84, B1617/84 and B1618/84 may be output at this time, but they are not related to this check.

    B --> See step 12

    C --> See step 11

    A --> See step 13

  7. CHECK INSTRUMENT PANEL WIRE (OPEN)
    1. Disconnect the instrument panel wire connector from the engine room main wire.

      Fig. 7: Identifying Instrument Panel Wire Sensor
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector B.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      AD11-1 (+SR) - AD11-2 (-SR) Always Below 1 ohms

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  8. CHECK INSTRUMENT PANEL WIRE (SHORT)
    1. Disconnect the instrument panel wire connector from the engine room main wire.

      Fig. 8: Identifying Instrument Panel Wire RH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      AD11-1 (+SR) - AD11-2 (-SR) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  9. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 9: Identifying Instrument Panel Wire RH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the instrument panel wire connector from the engine room main wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      AD11-1 (+SR) - Body ground Ignition switch ON Below 1 V
      AD11-2 (-SR) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
    1. Disconnect the instrument panel wire connector from the engine room main wire.

      Fig. 10: Identifying Instrument Panel Wire RH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      AD11-1 (+SR) - Body ground Always 1 Mohms or higher
      AD11-2 (-SR) - Body ground Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  11. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  12. REPLACE FRONT AIRBAG SENSOR RH. Refer to REMOVAL
  13. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1608/84: Front Satellite Sensor Bus LH Initialization Incomplete; DTC B1617/84: Lost Communication with Front Airbag Sensor LH; DTC B1618/84: Front Airbag Sensor LH Initialization Incomplete

DESCRIPTION

The front airbag sensor LH circuit consists of the center airbag sensor assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the front airbag sensor LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1608/84
B1617/84
B1618/84
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor LH circuit.
  • Front airbag sensor LH malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor LH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 11: Front Airbag Sensor LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and front airbag sensor LH. Also check that the connectors that link the engine room main wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly and front airbag sensor LH. Also disconnect the connectors that link the engine room main wire and instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN)
    1. Connect the connectors that link the engine room main wire and instrument panel wire.

      Fig. 12: Identifying Front Airbag Sensor LH Circuit (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 30 (+SL) and 28 (-SL) of connector B.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A4-2 (+SL) - A4-1 (-SL) Always Below 1 ohms

    NG --> See step 7

    OK: Go to next step

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT)
    1. Disconnect SST from connector B.

      Fig. 13: Identifying Front Airbag Sensor LH Circuit (Short To Ground)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A4-2 (+SL) - A4-1 (-SL) Always 1 Mohms or higher

    NG --> See step 8

    OK: Go to next step

  4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 14: Identifying Front Airbag Sensor LH Circuit (Short To Ground)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A4-2 (+SL) - Body ground Ignition switch ON Below 1 V
      A4-1 (-SL) - Body ground Ignition switch ON Below 1 V

    NG --> See step 9

    OK: Go to next step

  5. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 15: Identifying Front Airbag Sensor LH Circuit (Short To Ground)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A4-2 (+SL) - Body ground Always 1 Mohms or higher
      A4-1 (-SL) - Body ground Always 1 Mohms or higher

    NG --> See step 10

    OK: Go to next step

  6. CHECK FRONT AIRBAG SENSOR LH
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 16: Identifying Front Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the front airbag sensor RH with the front airbag sensor LH and connect the connectors to them.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1603/83, B1612/83, B1613/83, B1608/84, B1617/84 and B1618/84 are not output. A
      DTC B1608/84, B1617/84 or B1618/84 is output. B
      DTC B1603/83, B1612/83 or B1613/83 is output. C

      HINT:

      Codes other than DTCs B1603/83, B1612/83, B1613/83, B1608/84, B1617/84 and B1618/84 may be output at this time, but they are not related to this check.

    B --> See step 12

    C --> See step 11

    A --> See step 13

  7. CHECK INSTRUMENT PANEL WIRE (OPEN)
    1. Disconnect the instrument panel wire connector from the engine room main wire.

      Fig. 17: Identifying Instrument Panel Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector B.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      AD11-3 (+SL) - AD11-4 (-SL) Always Below 1 ohms

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  8. CHECK INSTRUMENT PANEL WIRE (SHORT)
    1. Disconnect the instrument panel wire connector from the engine room main wire.

      Fig. 18: Identifying Instrument Panel Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      AD11-3 (+SL) - AD11-4 (-SL) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  9. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 19: Identifying Instrument Panel Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the instrument panel wire connector from the engine room main wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      AD11-3 (+SL) - Body ground Ignition switch ON Below 1 V
      AD11-4 (-SL) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
    1. Disconnect the instrument panel wire connector from the engine room main wire.

      Fig. 20: Identifying Instrument Panel Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      AD11-3 (+SL) - Body ground Always 1 Mohms or higher
      AD11-4 (-SL) - Body ground Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE ENGINE ROOM MAIN WIRE

  11. REPLACE FRONT AIRBAG SENSOR LH. Refer to REMOVAL
  12. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  13. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1610/13: Front Airbag Sensor RH Malfunction

DESCRIPTION

The front airbag sensor RH circuit consists of the center airbag sensor assembly and front airbag sensor RH.

The front airbag sensor RH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1610/13 is stored when a malfunction is detected in the front airbag sensor RH.

DTC No. DTC Detection Condition Trouble Area
B1610/13
  • Front airbag sensor RH malfunction
  • Center airbag sensor assembly malfunction
  • Front airbag sensor RH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 21: Front Airbag Sensor RH- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK FRONT AIRBAG SENSOR RH
    1. Turn the ignition switch off.

      Fig. 22: Identifying Front Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the front airbag sensor LH with the front airbag sensor RH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1610/13 and B1615/14 is not output. A
      DTC B1610/13 is output. B
      DTC B1615/14 is output. C

      HINT:

      Codes other than DTCs B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE FRONT AIRBAG SENSOR RH. Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1615/14: Front Airbag Sensor LH Malfunction

DESCRIPTION

The front airbag sensor LH circuit consists of the center airbag sensor assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1615/14 is stored when a malfunction is detected in the front airbag sensor LH.

DTC No. DTC Detecting Condition Trouble Area
B1615/14
  • Front airbag sensor LH malfunction
  • Center airbag sensor assembly malfunction
  • Front airbag sensor LH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 23: Front Airbag Sensor LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK FRONT AIRBAG SENSOR LH
    1. Turn the ignition switch off.

      Fig. 24: Identifying Front Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the front airbag sensor RH with the front airbag sensor LH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1610/13 and B1615/14 are not output. A
      DTC B1615/14 is output. B
      DTC B1610/13 is output. C

      HINT:

      Codes other than DTCs B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

    B --> See step 3

    C --> See step 2

    A --> See step 4

  2. REPLACE FRONT AIRBAG SENSOR LH. Refer to REMOVAL
  3. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B161A/8A: Lost Communication with Front Satellite Sensor Bus

DESCRIPTION

The front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit) is composed of the center airbag sensor assembly, front airbag sensor RH and front airbag sensor LH.

The front airbag sensor RH or front airbag sensor LH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B161A/8A is stored when a malfunction is detected in the front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).

DTC No. DTC Detection Condition Trouble Area
B161A/8A
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front collision sensor circuit (front airbag sensor RH circuit and front airbag sensor LH circuit).
  • Front airbag sensor RH malfunction
  • Front airbag sensor LH malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor RH
  • Front airbag sensor LH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 25: Identifying Airbag Assembly Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Turn the ignition switch off.

      HINT:

      If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. To identify the malfunctioning area, turn the ignition switch off and then to ON again.

    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1613/83 and B1618/84 are not output. A
      DTC B1613/83 is output. B
      DTC B1618/84 is output. C

      HINT:

      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then to ON again.
      • Codes other than DTCs B1613/83 and B1618/84 may be output at this time, but they are not related to this check.

    B --> See step 3

    C --> See step 4

    A: Go to next step

  2. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    3. Turn the ignition switch off.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B161A/8A is not output.

      HINT:

      Codes other than DTC B161A/8A may be output at this time, but they are not related to this check.

    NG --> See step 5

    OK --> See step 6

  3. GO TO DTC B1613/83. Refer to DTC B1603/83: Front Satellite Sensor Bus RH Initialization Incomplete; DTC B1612/83: Lost Communication with Front Airbag Sensor RH; DTC B1613/83: Front Airbag Sensor RH Initialization Incomplete
  4. GO TO DTC B1618/84. Refer to DTC B1608/84: Front Satellite Sensor Bus LH Initialization Incomplete; DTC B1617/84: Lost Communication with Front Airbag Sensor LH; DTC B1618/84: Front Airbag Sensor LH Initialization Incomplete
  5. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  6. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1620/21: Side Airbag Sensor RH Circuit Malfunction

DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat airbag assembly RH and curtain shield airbag assembly RH) is composed of the center airbag sensor assembly, side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side).

The side airbag sensor RH (for rear side) detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1620/21 is stored when a malfunction is detected in the side airbag sensor RH (for rear side).

DTC No. DTC Detection Condition Trouble Area
B1620/21
  • Side airbag sensor RH (for rear side) malfunction
  • Center airbag sensor assembly malfunction
  • Side airbag sensor RH (for rear side)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 26: Identifying Side Airbag Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
    1. Turn the ignition switch off.

      Fig. 27: Identifying Side Airbag Sensor RH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the side airbag sensor RH (for rear side) with the side airbag sensor LH (for rear side) and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1620/21 and B1625/22 are not output. A
      DTC B1620/21 is output. B
      DTC B1625/22 is output. C

      HINT:

      Codes other than DTCs B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE SIDE AIRBAG SENSOR RH (FOR REAR SIDE). Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1622/81: Lost communication with Side Airbag Sensor RH; DTC B1623/81: Side Airbag Sensor Assembly RH Initialization Incomplete; DTC B1632/81: Lost Communication with Rear Airbag Sensor RH; DTC B1633/81: Rear Airbag Sensor Assembly RH Initialization Incomplete; DTC B1642/81: Lost Communication with Side Satellite Sensor Bus RH; DTC B1692/81: Lost Communication with Door Side Airbag Sensor RH; DTC B1693/81: Door Side Airbag Sensor RH Initialization Incomplete

DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat airbag assembly RH and curtain shield airbag assembly RH) is composed of the center airbag sensor assembly, side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side).

The side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the circuit for the side collision sensor RH (to determine deployment of the front seat airbag assembly RH and curtain shield airbag assembly RH).

DTC No. DTC Detection Condition Trouble Area
B1622/81
B1623/81
B1632/81
B1633/81
B1642/81
B1692/81
B1693/81
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the circuit for the side collision sensor RH (to determine deployment of the front seat airbag assembly RH and curtain shield airbag assembly RH).
  • Side airbag sensor RH (for rear side) malfunction
  • Rear airbag sensor RH malfunction
  • Side airbag sensor RH (for front side) malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front door wire RH
  • Side airbag sensor RH (for rear side)
  • Rear airbag sensor RH
  • Side airbag sensor RH (for front side)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 28: Identifying Side Airbag Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK PRESENT DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for present DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Present DTC B1642 or 81 is output. A
      Present DTC B1623 or B1633 is output. B
      Present DTC B1692 or B1693 is output. C
      Present DTC B1622 or B1632 is output. D

      HINT:

      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then to ON again.
      • Codes other than present DTCs B1622, B1623, B1632, B1633, B1642, B1692, B1693 and 81 may be output at this time, but they are not related to this check.

    B --> See step 18

    C --> See step 43

    D --> See step 50

    A: Go to next step

  2. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side). Also check that the connectors that link the floor wire and front door wire RH are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly, side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side). Also disconnect the connectors that link the floor wire and front door wire RH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  3. CHECK FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 17 (BBR+) and 18 (BBR-) of connector B.

      Fig. 29: Identifying Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-4 (BBR+) - N3-3 (BBR-) Always Below 1 ohms

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  4. CHECK FLOOR WIRE (SHORT)
    1. Disconnect SST from connector B.

      Fig. 30: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-4 (BBR+) - N3-3 (BBR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  5. CHECK FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 31: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N3-4 (BBR+) - Body ground Ignition switch ON Below 1 V
      N3-3 (BBR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  6. CHECK FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 32: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-4 (BBR+) - Body ground Always 1 Mohms or higher
      N3-3 (BBR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  7. CHECK FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 4 (BCR+) and 3 (BCR-) of connector C.

      Fig. 33: Identifying Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always Below 1 ohms

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  8. CHECK FLOOR WIRE (SHORT)
    1. Disconnect SST from connector C.

      Fig. 34: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  9. CHECK FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 35: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      N3-2 (BCR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  10. CHECK FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 36: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - Body ground Always 1 Mohms or higher
      N3-2 (BCR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  11. CHECK WIRE HARNESS (OPEN)
    1. Connect the connectors that link the floor wire and front door wire RH.

      Fig. 37: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - N21-2 (BDR-) Always Below 1 ohms

    NG --> See step 53

    OK: Go to next step

  12. CHECK WIRE HARNESS (SHORT)
    1. Disconnect SST from connector E.

      Fig. 38: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - N21-2 (BDR-) Always 1 Mohms or higher

    NG --> See step 54

    OK: Go to next step

  13. CHECK WIRE HARNESS (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 39: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N21-1 (BDR+) - Body ground Ignition switch ON Below 1 V
      N21-2 (BDR-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 55

    OK: Go to next step

  14. CHECK WIRE HARNESS (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 40: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - Body ground Always 1 Mohms or higher
      N21-2 (BDR-) - Body ground Always 1 Mohms or higher

    NG --> See step 56

    OK: Go to next step

  15. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
    1. Connect the connectors to the rear airbag sensor RH, side airbag sensor RH (for front side) and center airbag sensor assembly.

      Fig. 41: Identifying Side Airbag Sensor RH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the side airbag sensor LH (for rear side) with the side airbag sensor RH (for rear side) and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1642 or 81 is output. A
      DTC B1647 or 82 is output. B
      DTCs B1642 or 81 and B1647 or 82 are not output. C

      HINT:

      Codes other than DTCs B1642 or 81 and B1647 or 82 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A: Go to next step

  16. CHECK REAR AIRBAG SENSOR RH
    1. Turn the ignition switch off.

      Fig. 42: Identifying Rear Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor LH (for rear side) and side airbag sensor RH (for rear side) to their original positions and connect the connectors.
    4. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors to them.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1642 or 81 is output. A
      DTC B1647 or 82 is output. B
      DTCs B1642 or 81 and B1647 or 82 are not output. C

      HINT:

      Codes other than DTCs B1642 or 81 and B1647 or 82 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A: Go to next step

  17. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE)
    1. Turn the ignition switch off.

      Fig. 43: Identifying Side Airbag Sensor RH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the rear airbag sensor LH and rear airbag sensor RH to their original positions and connect the connectors.
    4. Interchange the side airbag sensor LH (for front side) with the side airbag sensor RH (for front side) and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1642 or 81 is output. A
      DTC B1647 or 82 is output. B
      DTCs B1642 or 81 and B1647 or 82 are not output. C

      HINT:

      Codes other than DTCs B1642 or 81 and B1647 or 82 may be output at this time, but they are not related to this check.

    B --> See step 60

    C --> See step 57

    A --> See step 61

  18. CHECK PAST DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for past DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Past DTCs B1622 and B1632 are not output. A
      Past DTC B1622 is output. B
      Past DTC B1632 is output. C

      HINT:

      Codes other than past DTCs B1622 and B1632 may be output at this time, but they are not related to this check.

    B --> See step 51

    C --> See step 52

    A: Go to next step

  19. CHECK PRESENT DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for present DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Present DTC B1623 is output. A
      Present DTC B1633 is output. B

      HINT:

      Codes other than present DTCs B1623 and B1633 may be output at this time, but they are not related to this check.

    B --> See step 31

    A: Go to next step

  20. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor RH (for rear side) and rear airbag sensor RH.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly, side airbag sensor RH (for rear side) and rear airbag sensor RH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  21. CHECK FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 17 (BBR+) and 18 (BBR-) of connector B.

      Fig. 44: Identifying Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-4 (BBR+) - N3-3 (BBR-) Always Below 1 ohms

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  22. CHECK FLOOR WIRE (SHORT)
    1. Disconnect SST from connector B.

      Fig. 45: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-4 (BBR+) - N3-3 (BBR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  23. CHECK FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 46: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N3-4 (BBR+) - Body ground Ignition switch ON Below 1 V
      N3-3 (BBR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  24. CHECK FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 47: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-4 (BBR+) - Body ground Always 1 Mohms or higher
      N3-3 (BBR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  25. CHECK FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 4 (BCR+) and 3 (BCR-) of connector C.

      Fig. 48: Identifying Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always Below 1 ohms

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  26. CHECK FLOOR WIRE (SHORT)
    1. Disconnect SST from connector C.

      Fig. 49: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  27. CHECK FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 50: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      N3-2 (BCR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  28. CHECK FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 51: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - Body ground Always 1 Mohms or higher
      N3-2 (BCR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  29. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
    1. Connect the connectors to the rear airbag sensor RH and center airbag sensor assembly.

      Fig. 52: Identifying Side Airbag Sensor RH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the side airbag sensor LH (for rear side) with the side airbag sensor RH (for rear side) and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1623 is output. A
      DTC B1628 is output. B
      DTCs B1623 and B1628 are not output. C

      HINT:

      Codes other than DTCs B1623 and B1628 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A: Go to next step

  30. CHECK REAR AIRBAG SENSOR RH
    1. Turn the ignition switch off.

      Fig. 53: Identifying Rear Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor LH (for rear side) and side airbag sensor RH (for rear side) to their original positions and connect the connectors.
    4. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors to them.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1623 is output. A
      DTC B1628 is output. B
      DTCs B1623 and B1628 are not output. C

      HINT:

      Codes other than DTCs B1623 and B1628 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A --> See step 61

  31. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side). Also check that the connectors that link the floor wire and front door wire RH are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side). Also disconnect the connectors that link the floor wire and front door wire RH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  32. CHECK FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 4 (BCR+) and 3 (BCR-) of connector C.

      Fig. 54: Identifying Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always Below 1 ohms

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  33. CHECK FLOOR WIRE (SHORT)
    1. Disconnect SST from connector C.

      Fig. 55: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - N3-2 (BCR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  34. CHECK FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 56: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N3-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      N3-2 (BCR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  35. CHECK FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 57: Identifying Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N3-1 (BCR+) - Body ground Always 1 Mohms or higher
      N3-2 (BCR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  36. CHECK WIRE HARNESS (OPEN)
    1. Connect the connectors that link the floor wire and front door wire RH.

      Fig. 58: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - N21-2 (BDR-) Always Below 1 ohms

    NG --> See step 53

    OK: Go to next step

  37. CHECK WIRE HARNESS (SHORT)
    1. Disconnect SST from connector E.

      Fig. 59: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - N21-2 (BDR-) Always 1 Mohms or higher

    NG --> See step 54

    OK: Go to next step

  38. CHECK WIRE HARNESS (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 60: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N21-1 (BDR+) - Body ground Ignition switch ON Below 1 V
      N21-2 (BDR-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 55

    OK: Go to next step

  39. CHECK WIRE HARNESS (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 61: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - Body ground Always 1 Mohms or higher
      N21-2 (BDR-) - Body ground Always 1 Mohms or higher

    NG --> See step 56

    OK: Go to next step

  40. CHECK REAR AIRBAG SENSOR RH
    1. Connect the connector to the side airbag sensor RH (for rear side) and side airbag sensor RH (for front side).

      Fig. 62: Identifying Rear Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors to them.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1633 is output. A
      DTC B1638 is output. B
      DTCs B1633 and B1638 are not output. C

      HINT:

      Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A: Go to next step

  41. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE)
    1. Turn the ignition switch off.

      Fig. 63: Identifying Side Airbag Sensor RH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the rear airbag sensor LH and rear airbag sensor RH to their original positions and connect the connectors.
    4. Interchange the side airbag sensor LH (for front side) with the side airbag sensor RH (for front side) and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1633 is output. A
      DTC B1638 is output. B
      DTCs B1633 and B1638 are not output. C

      HINT:

      Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 60

    C --> See step 57

    A: Go to next step

  42. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
    1. Turn the ignition switch off.

      Fig. 64: Identifying Side Airbag Sensor RH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor LH (for front side) and side airbag sensor RH (for front side) to their original positions and connect the connectors.
    4. Interchange the side airbag sensor LH (for rear side) with the side airbag sensor RH (for rear side) and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1633 is output. A
      DTC B1638 is output. B
      DTCs B1633 and B1638 are not output. C

      HINT:

      Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A --> See step 61

  43. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the rear airbag sensor RH and side airbag sensor RH (for front side). Also check that the connectors that link the floor wire and front door wire RH are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the rear airbag sensor RH and side airbag sensor RH (for front side). Also disconnect the connectors that link the floor wire and front door wire RH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  44. CHECK WIRE HARNESS (OPEN)
    1. Connect the connectors that link the floor wire and front door wire RH.

      Fig. 65: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - N21-2 (BDR-) Always Below 1 ohms

    NG --> See step 53

    OK: Go to next step

  45. CHECK WIRE HARNESS (SHORT)
    1. Disconnect SST from connector E.

      Fig. 66: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - N21-2 (BDR-) Always 1 Mohms or higher

    NG --> See step 54

    OK: Go to next step

  46. CHECK WIRE HARNESS (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 67: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N21-1 (BDR+) - Body ground Ignition switch ON Below 1 V
      N21-2 (BDR-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 55

    OK: Go to next step

  47. CHECK WIRE HARNESS (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 68: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N21-1 (BDR+) - Body ground Always 1 Mohms or higher
      N21-2 (BDR-) - Body ground Always 1 Mohms or higher

    NG --> See step 56

    OK: Go to next step

  48. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE)
    1. Connect the connectors to the rear airbag sensor RH.

      Fig. 69: Identifying Side Airbag Sensor RH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the side airbag sensor LH (for front side) with the side airbag sensor RH (for front side) and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1692 or B1693 is output. A
      DTC B1697 or B1698 is output. B
      DTCs B1692, B1693, B1697 and B1698 are not output. C

      HINT:

      Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

    B --> See step 60

    C --> See step 57

    A: Go to next step

  49. CHECK REAR AIRBAG SENSOR RH
    1. Turn the ignition switch off.

      Fig. 70: Identifying Rear Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor LH (for front side) and side airbag sensor RH (for front side) to their original positions and connect the connectors.
    4. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1692 or B1693 is output. A
      DTC B1697 or B1698 is output. B
      DTCs B1692, B1693, B1697 and B1698 are not output. C

      HINT:

      Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A --> See step 61

  50. CHECK PRESENT DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for present DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Present DTC B1622 is output. A
      Present DTC B1632 is output. B

      HINT:

      Codes other than present DTCs B1622 and B1632 may be output at this time, but they are not related to this check.

    B --> See step 52

    A: Go to next step

  51. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
    1. Turn the ignition switch off.

      Fig. 71: Identifying Side Airbag Sensor RH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the side airbag sensor LH (for rear side) with the side airbag sensor RH (for rear side) and connect the connectors.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1622 is output. A
      DTC B1627 is output. B
      DTCs B1622 and B1627 are not output. C

      HINT:

      Codes other than DTCs B1622 and B1627 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A --> See step 61

  52. CHECK REAR AIRBAG SENSOR RH
    1. Turn the ignition switch off.

      Fig. 72: Identifying Rear Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1632 is output. A
      DTC B1637 is output. B
      DTCs B1632 and B1637 are not output. C

      HINT:

      Codes other than DTCs B1632 and B1637 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A --> See step 61

  53. CHECK FRONT DOOR WIRE RH (OPEN)
    1. Disconnect the front door wire RH connector from the floor wire.

      Fig. 73: Identifying Front Door Wire RH (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector E.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      GN1-1 (BDR+) - GN1-2 (BDR-) Always Below 1 ohms

    NG --> REPLACE FRONT DOOR WIRE RH

    OK --> REPLACE FLOOR WIRE

  54. CHECK FRONT DOOR WIRE RH (SHORT)
    1. Disconnect the front door wire RH connector from the floor wire.

      Fig. 74: Identifying Front Door Wire RH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      GN1-1 (BDR+) - GN1-2 (BDR-) Always 1 Mohms or higher

    NG --> REPLACE FRONT DOOR WIRE RH

    OK --> REPLACE FLOOR WIRE

  55. CHECK FRONT DOOR WIRE RH (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 75: Identifying Front Door Wire RH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the front door wire RH connector from the floor wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      GN1-1 (BDR+) - Body ground Ignition switch ON Below 1 V
      GN1-2 (BDR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FRONT DOOR WIRE RH

    OK --> REPLACE FLOOR WIRE

  56. CHECK FRONT DOOR WIRE RH (SHORT TO GROUND)
    1. Disconnect the front door wire RH connector from the floor wire.

      Fig. 76: Identifying Front Door Wire RH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      GN1-1 (BDR+) - Body ground Always 1 Mohms or higher
      GN1-2 (BDR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FRONT DOOR WIRE RH

    OK --> REPLACE FLOOR WIRE

  57. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  58. REPLACE SIDE AIRBAG SENSOR RH (FOR REAR SIDE). Refer to REMOVAL
  59. REPLACE REAR AIRBAG SENSOR RH. Refer to REMOVAL
  60. REPLACE SIDE AIRBAG SENSOR RH (FOR FRONT SIDE). Refer to REMOVAL
  61. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL

DTC B1625/22: Side Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side).

The side airbag sensor LH (for rear side) detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1625/22 is stored when a malfunction is detected in the side airbag sensor LH (for rear side).

DTC No. DTC Detection Condition Trouble Area
B1625/22
  • Side airbag sensor LH (for rear side) malfunction
  • Center airbag sensor assembly malfunction
  • Side airbag sensor LH (for rear side)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 77: Identifying Side Airbag Sensor LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)
    1. Turn the ignition switch off.

      Fig. 78: Identifying Side Airbag Sensor LH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the side airbag sensor LH (for rear side) with the side airbag sensor RH (for rear side) and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1620/21 and B1625/22 are not output. A
      DTC B1625/22 is output. B
      DTC B1620/21 is output. C

      HINT:

      Codes other than DTCs B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE SIDE AIRBAG SENSOR LH (FOR REAR SIDE). Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1627/82: Lost communication with Side Airbag Sensor LH; DTC B1628/82: Side Airbag Sensor Assembly LH Initialization Incomplete; DTC B1637/82: Lost Communication with Rear Airbag Sensor LH; DTC B1638/82: Rear Airbag Sensor Assembly LH Initialization Incomplete; DTC B1647/82: Lost Communication with Side Satellite Sensor Bus LH; DTC B1697/82: Lost Communication with Door Side Airbag Sensor LH; DTC B1698/82: Door Side Airbag Sensor LH Initialization Incomplete

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side).

The side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected for the side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH).

DTC No. DTC Detection Condition Trouble Area
B1627/82
B1628/82
B1637/82
B1638/82
B1647/82
B1697/82
B1698/82
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH).
  • Side airbag sensor LH (for rear side) malfunction
  • Rear airbag sensor LH malfunction
  • Side airbag sensor LH (for front side) malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front door wire LH
  • Side airbag sensor LH (for rear side)
  • Rear airbag sensor LH
  • Side airbag sensor LH (for front side)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 79: Identifying Side Airbag Sensor LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK PRESENT DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for present DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Present DTC B1647 or 82 is output. A
      Present DTC B1628 or B1638 is output. B
      Present DTC B1697 or B1698 is output. C
      Present DTC B1627 or B1637 is output. D

      HINT:

      • DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then to ON again.
      • Codes other than present DTCs B1627, B1628, B1637, B1638, B1647, B1697, B1698 and 82 may be output at this time, but they are not related to this check.

    B --> See step 18

    C --> See step 43

    D --> See step 50

    A: Go to next step

  2. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side). Also check that the connectors that link the No. 2 floor wire and front door wire LH are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side). Also disconnect the connectors that link the No. 2 floor wire and front door wire LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  3. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

      Fig. 80: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-4 (BBL+) - O3-3 (BBL-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  4. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect SST from connector B.

      Fig. 81: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-4 (BBL+) - O3-3 (BBL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  5. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 82: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O3-4 (BBL+) - Body ground Ignition switch ON Below 1 V
      O3-3 (BBL-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  6. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 83: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-4 (BBL+) - Body ground Always 1 Mohms or higher
      O3-3 (BBL-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  7. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 4 (BCL+) and 3 (BCL-) of connector C.

      Fig. 84: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  8. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect SST from connector C.

      Fig. 85: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  9. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 86: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      O3-2 (BCL-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  10. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 87: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - Body ground Always 1 Mohms or higher
      O3-2 (BCL-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  11. CHECK WIRE HARNESS (OPEN)
    1. Connect the connectors that link the No. 2 floor wire and front door wire LH.

      Fig. 88: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - O51-2 (BDL-) Always Below 1 ohms

    NG --> See step 53

    OK: Go to next step

  12. CHECK WIRE HARNESS (SHORT)
    1. Disconnect SST from connector E.

      Fig. 89: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - O51-2 (BDL-) Always 1 Mohms or higher

    NG --> See step 54

    OK: Go to next step

  13. CHECK WIRE HARNESS (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 90: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O51-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      O51-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 55

    OK: Go to next step

  14. CHECK WIRE HARNESS (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 91: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - Body ground Always 1 Mohms or higher
      O51-2 (BDL-) - Body ground Always 1 Mohms or higher

    NG --> See step 56

    OK: Go to next step

  15. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)
    1. Connect the connectors to the rear airbag sensor LH, side airbag sensor LH (for front side) and center airbag sensor assembly.

      Fig. 92: Identifying Side Airbag Sensor LH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the side airbag sensor RH (for rear side) with the side airbag sensor LH (for rear side) and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1647 or 82 is output. A
      DTC B1642 or 81 is output. B
      DTCs B1642 or 81 and B1647 or 82 are not output. C

      HINT:

      Codes other than DTCs B1642 or 81 and B1647 or 82 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A: Go to next step

  16. CHECK REAR AIRBAG SENSOR LH
    1. Turn the ignition switch off.

      Fig. 93: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor RH (for rear side) and side airbag sensor LH (for rear side) to their original positions and connect the connectors.
    4. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors to them.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1647 or 82 is output. A
      DTC B1642 or 81 is output. B
      DTCs B1642 or 81 and B1647 or 82 are not output. C

      HINT:

      Codes other than DTCs B1642 or 81 and B1647 or 82 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A: Go to next step

  17. CHECK SIDE AIRBAG SENSOR LH (FOR FRONT SIDE)
    1. Turn the ignition switch off.

      Fig. 94: Identifying Side Airbag Sensor LH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the rear airbag sensor RH and rear airbag sensor LH to their original positions and connect the connectors.
    4. Interchange the side airbag sensor RH (for front side) with the side airbag sensor LH (for front side) and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1647 or 82 is output. A
      DTC B1642 or 81 is output. B
      DTCs B1642 or 81 and B1647 or 82 are not output. C

      HINT:

      Codes other than DTCs B1642 or 81 and B1647 or 82 may be output at this time, but they are not related to this check.

    B --> See step 60

    C --> See step 57

    A --> See step 61

  18. CHECK PAST DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for past DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Past DTCs B1627 and B1637 are not output. A
      Past DTC B1627 is output. B
      Past DTC B1637 is output. C

      HINT:

      Codes other than past DTCs B1627 and B1637 may be output at this time, but they are not related to this check.

    B --> See step 51

    C --> See step 52

    A: Go to next step

  19. CHECK PRESENT DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for present DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Present DTC B1628 is output. A
      Present DTC B1638 is output. B

      HINT:

      Codes other than present DTCs B1628 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 31

    A: Go to next step

  20. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor LH (for rear side) and rear airbag sensor LH.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly, side airbag sensor LH (for rear side) and rear airbag sensor LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  21. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

      Fig. 95: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-4 (BBL+) - O3-3 (BBL-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  22. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect SST from connector B.

      Fig. 96: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-4 (BBL+) - O3-3 (BBL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  23. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 97: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O3-4 (BBL+) - Body ground Ignition switch ON Below 1 V
      O3-3 (BBL-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  24. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 98: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-4 (BBL+) - Body ground Always 1 Mohms or higher
      O3-3 (BBL-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  25. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 4 (BCL+) and 3 (BCL-) of connector C.

      Fig. 99: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  26. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect SST from connector C.

      Fig. 100: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  27. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 101: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      O3-2 (BCL-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  28. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 102: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - Body ground Always 1 Mohms or higher
      O3-2 (BCL-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  29. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)
    1. Connect the connectors to the rear airbag sensor LH and center airbag sensor assembly.

      Fig. 103: Identifying Side Airbag Sensor LH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the side airbag sensor RH (for rear side) with the side airbag sensor LH (for rear side) and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1628 is output. A
      DTC B1623 is output. B
      DTCs B1623 and B1628 are not output. C

      HINT:

      Codes other than DTCs B1623 and B1628 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A: Go to next step

  30. CHECK REAR AIRBAG SENSOR LH
    1. Turn the ignition switch off.

      Fig. 104: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor RH (for rear side) and side airbag sensor LH (for rear side) to their original positions and connect the connectors.
    4. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1628 is output. A
      DTC B1623 is output. B
      DTCs B1623 and B1628 are not output. C

      HINT:

      Codes other than DTCs B1623 and B1628 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A --> See step 61

  31. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side). Also check that the connectors that link the No. 2 floor wire and front door wire LH are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side). Also disconnect the connectors that link the No. 2 floor wire and front door wire LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  32. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 4 (BCL+) and 3 (BCL-) of connector C.

      Fig. 105: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  33. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect SST from connector C.

      Fig. 106: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - O3-2 (BCL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  34. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 107: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O3-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      O3-2 (BCL-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  35. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 108: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O3-1 (BCL+) - Body ground Always 1 Mohms or higher
      O3-2 (BCL-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  36. CHECK WIRE HARNESS (OPEN)
    1. Connect the connectors that link the No. 2 floor wire and front door wire LH.

      Fig. 109: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - O51-2 (BDL-) Always Below 1 ohms

    NG --> See step 53

    OK: Go to next step

  37. CHECK WIRE HARNESS (SHORT)
    1. Disconnect SST from connector E.

      Fig. 110: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - O51-2 (BDL-) Always 1 Mohms or higher

    NG --> See step 54

    OK: Go to next step

  38. CHECK WIRE HARNESS (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 111: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O51-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      O51-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 55

    OK: Go to next step

  39. CHECK WIRE HARNESS (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 112: Identifying Wire Harness (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - Body ground Always 1 Mohms or higher
      O51-2 (BDL-) - Body ground Always 1 Mohms or higher

    NG --> See step 56

    OK: Go to next step

  40. CHECK REAR AIRBAG SENSOR LH
    1. Connect the connector to the side airbag sensor LH (for rear side) and side airbag sensor LH (for front side).

      Fig. 113: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1638 is output. A
      DTC B1633 is output. B
      DTCs B1633 and B1638 are not output. C

      HINT:

      Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A: Go to next step

  41. CHECK SIDE AIRBAG SENSOR LH (FOR FRONT SIDE)
    1. Turn the ignition switch off.

      Fig. 114: Identifying Side Airbag Sensor LH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the rear airbag sensor RH and rear airbag sensor LH to their original positions and connect the connectors.
    4. Interchange the side airbag sensor RH (for front side) with the side airbag sensor LH (for front side) and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1638 is output. A
      DTC B1633 is output. B
      DTCs B1633 and B1638 are not output. C

      HINT:

      Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 60

    C --> See step 57

    A: Go to next step

  42. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)
    1. Turn the ignition switch off.

      Fig. 115: Identifying Side Airbag Sensor LH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor RH (for front side) and side airbag sensor LH (for front side) to their original positions and connect the connectors.
    4. Interchange the side airbag sensor RH (for rear side) with the side airbag sensor LH (for rear side) and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1638 is output. A
      DTC B1633 is output. B
      DTCs B1633 and B1638 are not output. C

      HINT:

      Codes other than DTCs B1633 and B1638 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A --> See step 61

  43. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the rear airbag sensor LH and side airbag sensor LH (for front side). Also check that the connectors that link the No. 2 floor wire and front door wire LH are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the rear airbag sensor LH and side airbag sensor LH (for front side). Also disconnect the connectors that link the No. 2 floor wire and front door wire LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  44. CHECK WIRE HARNESS (OPEN)
    1. Connect the connectors that link the No. 2 floor wire and front door wire LH.

      Fig. 116: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - O51-2 (BDL-) Always Below 1 ohms

    NG --> See step 53

    OK: Go to next step

  45. CHECK WIRE HARNESS (SHORT)
    1. Disconnect SST from connector E.

      Fig. 117: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - O51-2 (BDL-) Always 1 Mohms or higher

    NG --> See step 54

    OK: Go to next step

  46. CHECK WIRE HARNESS (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 118: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O51-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      O51-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 55

    OK: Go to next step

  47. CHECK WIRE HARNESS (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 119: Identifying Wire Harness (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O51-1 (BDL+) - Body ground Always 1 Mohms or higher
      O51-2 (BDL-) - Body ground Always 1 Mohms or higher

    NG --> See step 56

    OK: Go to next step

  48. CHECK SIDE AIRBAG SENSOR LH (FOR FRONT SIDE)
    1. Connect the connectors to the rear airbag sensor LH.

      Fig. 120: Identifying Side Airbag Sensor LH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Interchange the side airbag sensor RH (for front side) with the side airbag sensor LH (for front side) and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1697 or B1698 is output. A
      DTC B1692 or B1693 is output. B
      DTCs B1692, B1693, B1697 and B1698 are not output. C

      HINT:

      Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

    B --> See step 60

    C --> See step 57

    A: Go to next step

  49. CHECK REAR AIRBAG SENSOR LH
    1. Turn the ignition switch off.

      Fig. 121: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the side airbag sensor RH (for front side) and side airbag sensor LH (for front side) to their original positions and connect the connectors.
    4. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors to them.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1697 or B1698 is output. A
      DTC B1692 or B1693 is output. B
      DTCs B1692, B1693, B1697 and B1698 are not output. C

      HINT:

      Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A --> See step 61

  50. CHECK PRESENT DTC
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Check for present DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      Present DTC B1627 is output. A
      Present DTC B1637 is output. B

      HINT:

      Codes other than present DTCs B1627 and B1637 may be output at this time, but they are not related to this check.

    B --> See step 52

    A: Go to next step

  51. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)
    1. Turn the ignition switch off.

      Fig. 122: Identifying Side Airbag Sensor LH (For Rear Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the side airbag sensor RH (for rear side) with the side airbag sensor LH (for rear side) and connect the connectors.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1627 is output. A
      DTC B1622 is output. B
      DTCs B1622 and B1627 are not output. C

      HINT:

      Codes other than DTCs B1622 and B1627 may be output at this time, but they are not related to this check.

    B --> See step 58

    C --> See step 57

    A --> See step 61

  52. CHECK REAR AIRBAG SENSOR LH
    1. Turn the ignition switch off.

      Fig. 123: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTC B1637 is output. A
      DTC B1632 is output. B
      DTCs B1632 and B1637 are not output. C

      HINT:

      Codes other than DTCs B1632 and B1637 may be output at this time, but they are not related to this check.

    B --> See step 59

    C --> See step 57

    A --> See step 61

  53. CHECK FRONT DOOR WIRE LH (OPEN)
    1. Disconnect the front door wire LH connector from the No. 2 floor wire.

      Fig. 124: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector E.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      HO1-1 (BDL+) - HO1-2 (BDL-) Always Below 1 ohms

    NG --> REPLACE FRONT DOOR WIRE LH

    OK --> REPLACE NO. 2 FLOOR WIRE

  54. CHECK FRONT DOOR WIRE LH (SHORT)
    1. Disconnect the front door wire LH connector from the No. 2 floor wire.

      Fig. 125: Identifying Front Door Wire LH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      HO1-1 (BDL+) - HO1-2 (BDL-) Always 1 Mohms or higher

    NG --> REPLACE FRONT DOOR WIRE LH

    OK --> REPLACE NO. 2 FLOOR WIRE

  55. CHECK FRONT DOOR WIRE LH (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 126: Identifying Front Door Wire LH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the front door wire LH connector from the No. 2 floor wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      HO1-1 (BDL+) - Body ground Ignition switch ON Below 1 V
      HO1-2 (BDL-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FRONT DOOR WIRE LH

    OK --> REPLACE NO. 2 FLOOR WIRE

  56. CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)
    1. Disconnect the front door wire LH connector from the No. 2 floor wire.

      Fig. 127: Identifying Front Door Wire LH (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      HO1-1 (BDL+) - Body ground Always 1 Mohms or higher
      HO1-2 (BDL-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FRONT DOOR WIRE LH

    OK --> REPLACE NO. 2 FLOOR WIRE

  57. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  58. REPLACE SIDE AIRBAG SENSOR LH (FOR REAR SIDE). Refer to REMOVAL
  59. REPLACE REAR AIRBAG SENSOR LH. Refer to REMOVAL
  60. REPLACE SIDE AIRBAG SENSOR LH (FOR FRONT SIDE). Refer to REMOVAL
  61. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL

DTC B1630/23: Rear Airbag Sensor RH Circuit Malfunction

DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat airbag assembly RH and curtain shield airbag assembly RH) is composed of the center airbag sensor assembly, side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side).

The rear airbag sensor RH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1630/23 is stored when a malfunction is detected in the rear airbag sensor RH.

DTC No. DTC Detection Condition Trouble Area
B1630/23
  • Rear airbag sensor RH malfunction
  • Center airbag sensor assembly malfunction
  • Rear airbag sensor RH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 128: Identifying Side Airbag Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK REAR AIRBAG SENSOR RH
    1. Turn the ignition switch off.

      Fig. 129: Identifying Rear Airbag Sensor RH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the rear airbag sensor LH with the rear airbag sensor RH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1630/23 and B1635/24 are not output. A
      DTC B1630/23 is output. B
      DTC B1635/24 is output. C

      HINT:

      Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE REAR AIRBAG SENSOR RH. Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1635/24: Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side).

The rear airbag sensor LH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1635/24 is stored when a malfunction is detected in the rear airbag sensor LH.

DTC No. DTC Detection Condition Trouble Area
B1635/24
  • Rear airbag sensor LH malfunction
  • Center airbag sensor assembly malfunction
  • Rear airbag sensor LH
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 130: Identifying Side Airbag Sensor LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK REAR AIRBAG SENSOR LH
    1. Turn the ignition switch off.

      Fig. 131: Identifying Rear Airbag Sensor LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the rear airbag sensor RH with the rear airbag sensor LH and connect the connectors to them.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1630/23 and B1635/24 are not output. A
      DTC B1635/24 is output. B
      DTC B1630/23 is output. C

      HINT:

      Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE REAR AIRBAG SENSOR LH. Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1650/32: Occupant Classification System Malfunction

DESCRIPTION

The occupant classification system circuit consists of the center airbag sensor assembly and occupant classification system.

If the center airbag sensor assembly receives signals from the occupant classification ECU, it determines whether the front passenger airbag and front seat outer belt RH should be operated.

DTC B1650/32 is stored when a malfunction is detected in the occupant classification system circuit.

DTC No. DTC Detection Condition Trouble Area
B1650/32
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the occupant classification system circuit.
  • Occupant classification system malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat wire RH
  • Occupant classification system
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 132: Center Airbag Sensor- Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK DTC (OCCUPANT CLASSIFICATION ECU)
    1. Turn the ignition switch to ON.
    2. Using Techstream, check the DTCs of the occupant classification ECU, refer to DTC CHECK / CLEAR .

    NG --> See step 12

    OK: Go to next step

  2. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and occupant classification ECU. Also check that the connectors that link the front seat wire RH and floor wire are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly and occupant classification ECU. Also disconnect the connectors that link the front seat wire RH and floor wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  3. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (OPEN)
    1. Connect the connectors that link the front seat wire RH and floor wire.

      Fig. 133: Identifying Occupant Classifications System Circuit (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 16 (FSR+) and 24 (FSR-) of connector B.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      a3-8 (FSR+) - a3-4 (FSR-) Always Below 1 ohms

    NG --> See step 7

    OK: Go to next step

  4. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT)
    1. Disconnect SST from connector B.

      Fig. 134: Identifying Occupant Classification System Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      a3-8 (FSR+) - a3-4 (FSR-) Always 1 Mohms or higher

    NG --> See step 8

    OK: Go to next step

  5. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 135: Identifying Occupant Classification System Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      a3-8 (FSR+) - Body ground Ignition switch ON Below 1 V
      a3-4 (FSR-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 9

    OK: Go to next step

  6. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 136: Identifying Occupant Classification System Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      a3-8 (FSR+) - Body ground Always 1 Mohms or higher
      a3-4 (FSR-) - Body ground Always 1 Mohms or higher

      HINT:

      After replacing the center airbag sensor assembly, check for DTCs of the center airbag sensor assembly. If the DTC B1650/32 is detected, replace the occupant classification ECU, refer to REMOVAL and perform "zero point calibration" and "sensitivity check" of the occupant classification system, refer to INITIALIZATION .

    NG --> See step 10

    OK --> See step 11

  7. CHECK FLOOR WIRE (OPEN)
    1. Disconnect the front seat wire RH connector from the floor wire.

      Fig. 137: Identifying Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector B.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Na1-1 (FSR+) - Na1-4 (FSR-) Always Below 1 ohms

    NG --> REPLACE FLOOR WIRE

    OK --> REPLACE FRONT SEAT WIRE RH

  8. CHECK FLOOR WIRE (SHORT)
    1. Disconnect the front seat wire RH connector from the floor wire.

      Fig. 138: Identifying Floor Wire (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Na1-1 (FSR+) - Na1-4 (FSR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK --> REPLACE FRONT SEAT WIRE RH

  9. CHECK FLOOR WIRE (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 139: Identifying Floor Wire (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the front seat wire RH connector from the floor wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      Na1-1 (FSR+) - Body ground Ignition switch ON Below 1 V
      Na1-4 (FSR-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE FLOOR WIRE

    OK --> REPLACE FRONT SEAT WIRE RH

  10. CHECK FLOOR WIRE (SHORT TO GROUND)
    1. Disconnect the front seat wire RH connector from the floor wire.

      Fig. 140: Identifying Floor Wire (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Na1-1 (FSR+) - Body ground Always 1 Mohms or higher
      Na1-4 (FSR-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK --> REPLACE FRONT SEAT WIRE RH

  11. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  12. REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to DIAGNOSTIC TROUBLE CODE CHART

DTC B1653/35: Seat Position Airbag Sensor Circuit Malfunction

DESCRIPTION

The seat position airbag sensor circuit consists of the center airbag sensor assembly and seat position airbag sensor.

DTC B1653/35 is stored when a malfunction is detected in the seat position airbag sensor circuit.

DTC No. DTC Detection Condition Trouble Area
B1653/35
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the seat position airbag sensor circuit.
  • Front seat inner belt assembly LH malfunction
  • Seat position airbag sensor malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat inner belt assembly LH
  • Seat position airbag sensor
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 141: Seat Position Airbag Sensor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly, front seat inner belt assembly LH and seat position airbag sensor.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly, front seat inner belt assembly LH and seat position airbag sensor.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (OPEN)
    1. Connect the connectors to the front seat inner belt assembly LH and No. 2 floor wire.

      Fig. 142: Identifying Seat Position Airbag Sensor Circuit (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 9 (LSP+) and 17 (LSP-) of connector B.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (LSP+) - 1 (LSP-) Always Below 1 ohms

    NG --> See step 10

    OK: Go to next step

  3. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT)
    1. Disconnect SST from connector B.

      Fig. 143: Identifying Seat Position Airbag Sensor Circuit (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (LSP+) - 1 (LSP-) Always 1 Mohms or higher

    NG --> See step 11

    OK: Go to next step

  4. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 144: Identifying Seat Position Airbag Sensor Circuit (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      2 (LSP+) - Body ground Ignition switch ON Below 1 V
      1 (LSP-) - Body ground Ignition switch ON Below 1 V

    NG --> See step 12

    OK: Go to next step

  5. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 145: Identifying Seat Position Airbag Sensor Circuit (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (LSP+) - Body ground Always 1 Mohms or higher
      1 (LSP-) - Body ground Always 1 Mohms or higher

    NG --> See step 13

    OK: Go to next step

  6. CHECK SEAT POSITION AIRBAG SENSOR
    1. Connect the connectors to the center airbag sensor assembly and seat position airbag sensor.

      Fig. 146: Identifying Seat Position Airbag Sensor
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1653/35 is not output.

      HINT:

      Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.

    NG --> See step 7

    OK --> See step 9

  7. REPLACE SEAT POSITION AIRBAG SENSOR
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Replace the seat position airbag sensor with a known good one, refer to REMOVAL .

      HINT:

      Perform inspection using parts from a normal vehicle if possible.

    NEXT: Go to next step

  8. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 147: Identifying Seat Position Airbag Sensor
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON, and wait for at least 60 seconds.
    3. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    4. Turn the ignition switch off.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1653/35 is not output.

      HINT:

      Codes other than DTC B1653/35 may be output at this time, but they are not related to this check.

    NG --> See step 14

    OK --> END

  9. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  10. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Disconnect the No. 2 floor wire from front seat inner belt assembly LH.

      Fig. 148: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector B.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-2 (LSP+) - O10-4 (LSP-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK --> See step 15

  11. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect the No. 2 floor wire from front seat belt inner belt assembly LH.

      Fig. 149: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-2 (LSP+) - O10-4 (LSP-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK --> See step 15

  12. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 150: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the No. 2 floor wire from front seat inner belt assembly LH.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O10-2 (LSP+) - Body ground Ignition switch ON Below 1 V
      O10-4 (LSP-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK --> See step 15

  13. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Disconnect the No. 2 floor wire from front seat inner belt assembly LH.

      Fig. 151: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-2 (LSP+) - Body ground Always 1 Mohms or higher
      O10-4 (LSP-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK --> See step 15

  14. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  15. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to REMOVAL

DTC B1656/38: Seat Belt Buckle Switch LH Circuit Malfunction

DESCRIPTION

The seat belt buckle switch LH circuit consists of the center airbag sensor assembly and front seat inner belt assembly LH.

DTC B1656/38 is stored when a malfunction is detected in the seat belt buckle switch LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1656/38
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the seat belt buckle switch LH circuit.
  • Front seat inner belt assembly LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat inner belt assembly LH (Seat belt buckle switch LH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 152: Identifying Front Seat Inner Belt Assembly Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and front seat inner belt assembly LH.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly and front seat inner belt assembly LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  2. CHECK NO. 2 FLOOR WIRE (OPEN)
    1. Using SST, connect terminals 10 (LBE+) and 18 (LBE-) of connector B.

      Fig. 153: Identifying No. 2 Floor Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      • SST: 09843-18040
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-1 (LBE+) - O10-3 (LBE-) Always Below 1 ohms

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  3. CHECK NO. 2 FLOOR WIRE (SHORT)
    1. Disconnect SST from connector B.

      Fig. 154: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-1 (LBE+) - O10-3 (LBE-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  4. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 155: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      O10-1 (LBE+) - Body ground Ignition switch ON Below 1 V
      O10-3 (LBE-) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  5. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)
    1. Turn the ignition switch off.

      Fig. 156: Identifying No. 2 Floor Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-1 (LBE+) - Body ground Always 1 Mohms or higher
      O10-3 (LBE-) - Body ground Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  6. CHECK FRONT SEAT INNER BELT ASSEMBLY LH
    1. Connect the connectors to the center airbag sensor assembly and front seat inner belt assembly LH.

      Fig. 157: Identifying Front Seat Inner Belt Assembly LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1656/38 is not output.

      HINT:

      Codes other than DTC B1656/38 may be output at this time, but they are not related to this check.

    NG --> See step 7

    OK --> See step 9

  7. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Replace the front seat inner belt assembly LH with a known good one, refer to REMOVAL .

      HINT:

      Perform inspection using parts from a normal vehicle if possible.

    NEXT: Go to next step

  8. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 158: Identifying Front Seat Inner Belt Assembly LH
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON, and wait for at least 60 seconds.
    3. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    4. Turn the ignition switch off.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1656/38 is not output.

      HINT:

      Codes other than DTC B1656/38 may be output at this time, but they are not related to this check.

    NG --> See step 10

    OK --> END

  9. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  10. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL

DTC B1660/43: Passenger Airbag ON/OFF Indicator Circuit Malfunction

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor assembly and passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag and front seat outer belt RH.

DTC B1660/43 is stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC No. DTC Detection Condition Trouble Area
B1660/43
  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the passenger airbag ON/OFF indicator circuit.
  • Passenger airbag ON/OFF indicator malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Navigation receiver Assembly (w/ Navigation system)
  • Integration control and panel assembly (w/o Navigation system)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 159: Passenger Airbag ON/OFF Indicator Circuit Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION
    1. Turn the ignition switch to ON.
    2. Check the passenger airbag ON/OFF indicator operation.

      HINT:

      Refer to the normal condition of the passenger airbag ON/OFF indicator, refer to DIAGNOSIS SYSTEM .

      Fig. 160: Identifying Passenger Airbag ON/OFF Indicator Condition
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Result

      ON/OFF Indicator Illumination Proceed to
      Always ON A
      OFF B

    B --> See step 9

    A: Go to next step

  2. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. w/ Navigation system:
      1. Check that the connectors are properly connected to the center airbag sensor assembly and navigation receiver assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

        OK

        The connectors are properly connected.

        HINT:

        If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

      2. Disconnect the connectors from the center airbag sensor assembly and navigation receiver assembly. Also disconnect the connectors that link the No. 2 instrument panel wire and instrument panel wire.
      3. Check that the terminals of the connectors are not damaged.

        OK

        The terminals are not deformed or damaged.

    4. w/o Navigation system:
      1. Check that the connectors are properly connected to the center airbag sensor assembly and integration control and panel assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

        OK

        The connectors are properly connected.

        HINT:

        If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

      2. Disconnect the connectors from the center airbag sensor assembly and integration control and panel assembly. Also disconnect the connectors that link the No. 2 instrument panel wire and instrument panel wire.
      3. Check that the terminals of the connectors are not damaged.

        OK

        The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR
    1. Connect the connectors that link the No. 2 instrument panel wire and instrument panel wire.

      Fig. 161: Identifying Passenger Airbag ON/OFF Indicator
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. w/ Navigation system:

      Connect the connector to the navigation receiver assembly.

    3. w/o Navigation system:

      Connect the connector to the integration control and panel assembly.

    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Check the passenger airbag ON/OFF indicator operation.

      OK

      The passenger airbag ON/OFF indicator does not come on.

    NG --> See step 5

    OK: Go to next step

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 162: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1660/43 is not output.

      HINT:

      Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.

    NG --> See step 17

    OK --> See step 18

  5. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)
    1. Turn the ignition switch off.

      Fig. 163: Identifying Passenger Airbag ON/OFF Indicator Circuit (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. w/ Navigation system:

      Disconnect the connector from the navigation receiver assembly.

    4. w/o Navigation system:

      Disconnect the connector from the integration control and panel assembly.

    5. Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      • SST: 09843-18040
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E19-8 (PAON) - E19-9 (P-AB) Always Below 1 ohms

    NG --> See step 21

    OK: Go to next step

  6. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)
    1. Disconnect SST from connector B.

      Fig. 164: Identifying Passenger Airbag ON/OFF Indicator Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E19-8 (PAON) - E19-9 (P-AB) Always 1 Mohms or higher

    NG --> See step 22

    OK: Go to next step

  7. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)
    1. Measure the resistance according to the value(s) in the table below.

      Fig. 165: Identifying Passenger Airbag ON/OFF Indicator Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E19-8 (PAON) - Body ground Always 1 Mohms or higher
      E19-9 (P-AB) - Body ground Always 1 Mohms or higher

    NG --> See step 23

    OK: Go to next step

  8. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 166: Identifying Passenger Airbag ON/OFF Indicator Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      E19-8 (PAON) - Body ground Ignition switch ON Below 1 V
      E19-9 (P-AB) - Body ground Ignition switch ON Below 1 V

      Result

      Result Proceed to
      OK (w/ Navigation system) A
      OK (w/o Navigation system) B
      NG C

    B --> See step 20

    C --> See step 24

    A --> See step 19

  9. CHECK CONNECTORS
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. w/ Navigation system:
      1. Check that the connectors are properly connected to the center airbag sensor assembly and navigation receiver assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

        OK

        The connectors are properly connected.

        HINT:

        If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

      2. Disconnect the connectors from the center airbag sensor assembly and navigation receiver assembly. Also disconnect the connectors that link the No. 2 instrument panel wire and instrument panel wire.
      3. Check that the terminals of the connectors are not damaged.

        OK

        The terminals are not deformed or damaged.

    4. w/o Navigation system:
      1. Check that the connectors are properly connected to the center airbag sensor assembly and integration control and panel assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

        OK

        The connectors are properly connected.

        HINT:

        If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

      2. Disconnect the connectors from the center airbag sensor assembly and integration control and panel assembly. Also disconnect the connectors that link the No. 2 instrument panel wire and instrument panel wire.
      3. Check that the terminals of the connectors are not damaged.

        OK

        The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  10. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (OPEN)
    1. Connect the connectors that link the No. 2 instrument panel wire and instrument panel wire.

      Fig. 167: Identifying Passenger Airbag ON/OFF Indicator Circuit (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      NOTE:

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      • SST: 09843-18040
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E19-8 (PAON) - E19-9 (P-AB) Always Below 1 ohms

    NG --> See step 21

    OK: Go to next step

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT)
    1. Disconnect SST from connector B.

      Fig. 168: Identifying Passenger Airbag ON/OFF Indicator Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E19-8 (PAON) - E19-9 (P-AB) Always 1 Mohms or higher

    NG --> See step 22

    OK: Go to next step

  12. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO GROUND)
    1. Measure the resistance according to the value(s) in the table below.

      Fig. 169: Identifying Passenger Airbag ON/OFF Indicator Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E19-8 (PAON) - Body ground Always 1 Mohms or higher
      E19-9 (P-AB) - Body ground Always 1 Mohms or higher

    NG --> See step 23

    OK: Go to next step

  13. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT (SHORT TO B+)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 170: Identifying Passenger Airbag ON/OFF Indicator Circuit (Short To B+)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      E19-8 (PAON) - Body ground Ignition switch ON Below 1 V
      E19-9 (P-AB) - Body ground Ignition switch ON Below 1 V

    NG --> See step 24

    OK: Go to next step

  14. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)
    1. Turn the ignition switch to ON.

      Fig. 171: Identifying Passenger Airbag ON/OFF Indicator Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      E19-1 (B) - Body ground Ignition switch ON 10 to 14 V

    NG --> REPLACE WIRE HARNESS (PASSENGER AIRBAG ON/OFF INDICATOR - BATTERY) OR BATTERY

    OK: Go to next step

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR
    1. Turn the ignition switch off.

      Fig. 172: Identifying Passenger Airbag ON/OFF Indicator Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. w/ Navigation system

      Connect the connector to the navigation receiver assembly.

    4. w/o Navigation system

      Connect the connector to the integration control and panel assembly.

    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON.
    7. Check the indicator according to the conditions in the table below.

      Indicator Condition

      Tester Connection Switch Condition Passenger Airbag ON/OFF Indicator
      D30-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      D30-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on

      Result

      Result Proceed to
      OK A
      NG (w/ Navigation system) B
      NG (w/o Navigation system) C

    B --> See step 19

    C --> See step 20

    A: Go to next step

  16. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Turn the ignition switch off.

      Fig. 173: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Connect the connector to the center airbag sensor assembly.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1660/43 is not output.

      HINT:

      Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.

    NG --> See step 17

    OK --> See step 18

  17. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  18. USE SIMULATION METHOD TO CHECK. Refer to DIAGNOSIS SYSTEM
  19. REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to REMOVAL
  20. REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY. Refer to REMOVAL
  21. CHECK INSTRUMENT PANEL WIRE (OPEN)
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.

      Fig. 174: Identifying Instrument Panel Wire (Open)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      HINT:

      SST has already been inserted into connector B.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ED5-4 (PAON) - ED5-3 (P-AB) Always Below 1 ohms

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE NO. 2 INSTRUMENT PANEL WIRE

  22. CHECK INSTRUMENT PANEL WIRE (SHORT)
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.

      Fig. 175: Identifying Instrument Panel Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ED5-4 (PAON) - ED5-3 (P-AB) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE NO. 2 INSTRUMENT PANEL WIRE

  23. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
    1. Disconnect the instrument panel wire from the No. 2 instrument panel wire.

      Fig. 176: Identifying Instrument Panel Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ED5-4 (PAON) - Body ground Always 1 Mohms or higher
      ED5-3 (P-AB) - Body ground Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE NO. 2 INSTRUMENT PANEL WIRE

  24. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
    1. Turn the ignition switch off.

      Fig. 177: Identifying Instrument Panel Wire (Short)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the instrument panel wire from the No. 2 instrument panel wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      ED5-4 (PAON) - Body ground Ignition switch ON Below 1 V
      ED5-3 (P-AB) - Body ground Ignition switch ON Below 1 V

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK --> REPLACE NO. 2 INSTRUMENT PANEL WIRE

DTC B1690/15: Door Side Airbag Sensor RH Malfunction

DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat airbag assembly RH and curtain shield airbag assembly RH) is composed of the center airbag sensor assembly, side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side).

The side airbag sensor RH (for front side) detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1690/15 is stored when a malfunction is detected in the side airbag sensor RH (for front side).

DTC No. DTC Detection Condition Trouble Area
B1690/15
  • Side airbag sensor RH (for front side) malfunction
  • Center airbag sensor assembly malfunction
  • Side airbag sensor RH (for front side)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 178: Identifying Side Airbag Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE)
    1. Turn the ignition switch off.

      Fig. 179: Identifying Side Airbag Sensor RH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the side airbag sensor LH (for front side) with the side airbag sensor RH (for front side) and connect the connectors.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1690/15 and B1695/16 are not output. A
      DTC B1690/15 is output. B
      DTC B1695/16 is output. C

      HINT:

      Codes other than DTCs B1690/15 and B1695/16 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE SIDE AIRBAG SENSOR RH (FOR FRONT SIDE). Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1695/16: Door Side Airbag Sensor LH Malfunction

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side).

The side airbag sensor LH (for front side) detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1695/16 is stored when a malfunction is detected in the side airbag sensor LH (for front side).

DTC No. DTC Detection Condition Trouble Area
B1695/16
  • Side airbag sensor LH (for front side) malfunction
  • Center airbag sensor assembly malfunction
  • Side airbag sensor LH (for front side)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 180: Identifying Side Airbag Sensor LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK SIDE AIRBAG SENSOR LH (FOR FRONT SIDE)
    1. Turn the ignition switch off.

      Fig. 181: Identifying Side Airbag Sensor LH (For Front Side)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Interchange the side airbag sensor RH (for front side) with the side airbag sensor LH (for front side) and connect the connectors.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.
    6. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    7. Turn the ignition switch off.
    8. Turn the ignition switch to ON, and wait for at least 60 seconds.
    9. Check for DTCs, refer to DTC CHECK / CLEAR .

      Result

      Result Proceed to
      DTCs B1690/15 and B1695/16 are not output. A
      DTC B1695/16 is output. B
      DTC B1690/15 is output. C

      HINT:

      Codes other than DTCs B1690/15 and B1695/16 may be output at this time, but they are not related to this check.

    B --> See step 2

    C --> See step 3

    A --> See step 4

  2. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  3. REPLACE SIDE AIRBAG SENSOR LH (FOR FRONT SIDE). Refer to REMOVAL
  4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1800/51: Short in Driver Side Squib Circuit; DTC B1801/51: Open in Driver Side Squib Circuit; DTC B1802/51: Short to GND in Driver Side Squib Circuit; DTC B1803/51: Short to B+ in Driver Side Squib Circuit

DESCRIPTION

  • The driver side squib circuit consists of the center airbag sensor assembly, spiral cable and steering pad.
  • The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.
  • These DTCs are stored when a malfunction is detected in the driver side squib circuit.

DTC No. DTC Detection Condition Trouble Area
B1800/51
  • The center airbag sensor assembly receives a line short circuit signal in the driver side squib circuit during primary check.
  • Driver side squib malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib)
  • Center airbag sensor assembly
B1801/51
  • The center airbag sensor assembly receives an open circuit signal in the driver side squib circuit.
  • Driver side squib malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib)
  • Center airbag sensor assembly
B1802/51
  • The center airbag sensor assembly receives a short circuit to ground signal in the driver side squib circuit.
  • Driver side squib malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib)
  • Center airbag sensor assembly
B1803/51
  • The center airbag sensor assembly receives a short circuit to B+ signal in the driver side squib circuit.
  • Driver side squib malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 182: Drive Side Squib - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 183: Checking Spiral Cable
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the steering pad, spiral cable and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the steering pad, spiral cable and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the spiral cable connector (on the steering pad side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed and damaged.

    7. Check that the short springs for the instrument panel wire and spiral cable with the activation prevention mechanism are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK STEERING PAD (DRIVER SIDE SQUIB)
    1. Connect the instrument panel wire to the center airbag sensor assembly and spiral cable.

      Fig. 184: Identifying Steering Pad (Driver Side Squib)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector E (orange connector).

      WARNING:

      Never connect the tester to the steering pad (driver side squib) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1800, B1801, B1802, B1803 or 51 is not output.

      HINT:

      Codes other than DTCs B1800, B1801, B1802, B1803 and 51 may be output at this time, but they are not related to this check.

    NG --> See step 3

    OK --> REPLACE STEERING PAD

  3. CHECK DRIVER SIDE SQUIB CIRCUIT
    1. Turn the ignition switch off.

      Fig. 185: Identifying SST & Connector E
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector E.
    4. Disconnect the instrument panel wire from center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        z3-1 (D-) - Body ground Ignition switch ON Below 1 V
        z3-2 (D+) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z3-1 (D-) - z3-2 (D+) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z3-1 (D-) - Body ground Always 1 Mohms or higher
        z3-2 (D+) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z3-1 (D-) - z3-2 (D+) Always 1 Mohms or higher

    NG --> See step 5

    OK: Go to next step

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 186: Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the steering pad and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1800, B1801, B1802, B1803 or 51 is not output.

      HINT:

      Codes other than DTCs B1800, B1801, B1802, B1803 and 51 may be output at this time, but they are not related to this check.

    NG --> See step 7

    OK --> See step 8

  5. CHECK INSTRUMENT PANEL WIRE
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 187: Identifying Instrument Panel Wire
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the instrument panel wire from the spiral cable.
    3. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        D15-1 (D+) - Body ground Ignition switch ON Below 1 V
        D15-2 (D-) - Body ground Ignition switch ON Below 1 V

    4. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D15-1 (D+) - D15-2 (D-) Always Below 1 ohms

    5. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D15-1 (D+) - Body ground Always 1 Mohms or higher
        D15-2 (D-) - Body ground Always 1 Mohms or higher

    6. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D15-1 (D+) - D15-2 (D-) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK: Go to next step

  6. CHECK SPIRAL CABLE
    1. Check for a short to B+ in the circuit.

      Fig. 188: Identifying Spiral Cable & Driver Side Squib
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        z3-1 (D-) - Body ground Ignition switch ON Below 1 V
        z3-2 (D+) - Body ground Ignition switch ON Below 1 V

    2. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z3-1 (D-) - z3-2 (D+) Always Below 1 ohms

    3. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z3-1 (D-) - Body ground Always 1 Mohms or higher
        z3-2 (D+) - Body ground Always 1 Mohms or higher

    4. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector D, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z3-1 (D-) - z3-2 (D+) Always 1 Mohms or higher

    NG --> See step 9

    OK --> See step 8

  7. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  8. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  9. REPLACE SPIRAL CABLE. Refer to REMOVAL

DTC B1805/52: Short in Front Passenger Side Squib Circuit; DTC B1806/52: Open in Front Passenger Side Squib Circuit; DTC B1807/52: Short to GND in Front Passenger Side Squib Circuit; DTC B1808/52: Short to B+ in Front Passenger Side Squib Circuit

DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor assembly and front passenger airbag assembly.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front passenger side squib circuit.

DTC No. DTC Detection Condition Trouble Area
B1805/52
  • The center airbag sensor assembly receives a line short circuit signal in the front passenger side squib circuit during primary check.
  • Front passenger side squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib)
  • Center airbag sensor assembly
B1806/52
  • The center airbag sensor assembly receives an open circuit signal in the front passenger side squib circuit.
  • Front passenger side squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib)
  • Center airbag sensor assembly
B1807/52
  • The center airbag sensor assembly receives a short circuit to ground signal in the front passenger side squib circuit.
  • Front passenger side squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib)
  • Center airbag sensor assembly
B1808/52
  • The center airbag sensor assembly receives a short circuit to B+ signal in the front passenger side squib circuit.
  • Front passenger side squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 189: Front Passenger Side Squib - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 190: Identifying Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that connectors are properly connected to the front passenger airbag assembly and center airbag sensor assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the front passenger airbag assembly and center airbag sensor assembly. Also disconnect the instrument panel wire from the No. 2 instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the No. 2 instrument panel wire connector (on the front passenger airbag assembly side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short springs for the No. 2 instrument panel wire and instrument panel wire with the activation prevention mechanism are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)
    1. Connect the instrument panel wire to the No. 2 instrument panel wire and center airbag sensor assembly.

      Fig. 191: Identifying Passenger Airbag Assembly (Front Passenger Squib)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector E (orange connector).

      WARNING:

      Never connect the tester to the front passenger airbag assembly (front passenger side squib) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1805, B1806, B1807, B1808 or 52 is not output.

      HINT:

      Codes other than DTCs B1805, B1806, B1807, B1808 and 52 may be output at this time, but they are not related to this check.

    NG --> See step 3

    OK --> REPLACE FRONT PASSENGER AIRBAG ASSEMBLY

  3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT
    1. Turn the ignition switch off.

      Fig. 192: Identifying Front Passenger Side Squib Circuit
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector E.
    4. Disconnect the instrument panel wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        e2-2 (P+) - Body ground Ignition switch ON Below 1 V
        e2-1 (P-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e2-2 (P+) - e2-1 (P-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e2-2 (P+) - Body ground Always 1 Mohms or higher
        e2-1 (P-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e2-2 (P+) - e2-1 (P-) Always 1 Mohms or higher

    NG --> See step 5

    OK: Go to next step

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 193: Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the front passenger airbag assembly and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1805, B1806, B1807, B1808 or 52 is not output.

      HINT:

      Codes other than DTCs B1805, B1806, B1807, B1808 and 52 may be output at this time, but they are not related to this check.

    NG --> See step 7

    OK --> See step 8

  5. CHECK INSTRUMENT PANEL WIRE
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 194: Identifying Instrument Panel Wire
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the No. 2 instrument panel wire from the instrument panel wire.
    3. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        De1-1 (P+) - Body ground Ignition switch ON Below 1 V
        De1-2 (P-) - Body ground Ignition switch ON Below 1 V

    4. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-1 (P+) - De1-2 (P-) Always Below 1 ohms

    5. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-1 (P+) - Body ground Always 1 Mohms or higher
        De1-2 (P-) - Body ground Always 1 Mohms or higher

    6. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-1 (P+) - De1-2 (P-) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK: Go to next step

  6. CHECK NO. 2 INSTRUMENT PANEL WIRE
    1. Check for a short to B+ in the circuit.

      Fig. 195: Identifying No. 2 Instrument Panel Wire
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        e2-2 (P+) - Body ground Ignition switch ON Below 1 V
        e2-1 (P-) - Body ground Ignition switch ON Below 1 V

    2. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e2-2 (P+) - e2-1 (P-) Always Below 1 ohms

    3. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e2-2 (P+) - Body ground Always 1 Mohms or higher
        e2-1 (P-) - Body ground Always 1 Mohms or higher

    4. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector D, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e2-2 (P+) - e2-1 (P-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK --> See step 8

  7. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  8. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1810/53: Short in Driver Side Squib 2nd Step Circuit; DTC B1811/53: Open in Driver Side Squib 2nd Step Circuit; DTC B1812/53: Short to GND in Driver Side Squib 2nd Step Circuit; DTC B1813/53: Short to B+ in Driver Side Squib 2nd Step Circuit

DESCRIPTION

  • The driver side squib 2nd step circuit consists of the center airbag sensor assembly, spiral cable and steering pad.
  • The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.
  • These DTCs are stored when a malfunction is detected in the driver side squib 2nd step circuit.

DTC No. DTC Detection Condition Trouble Area
B1810/53
  • The center airbag sensor assembly receives a line short circuit signal in the driver side squib 2nd step circuit during primary check.
  • Driver side squib 2nd step malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib 2nd step)
  • Center airbag sensor assembly
B1811/53
  • The center airbag sensor assembly receives an open circuit signal in the driver side squib 2nd step circuit.
  • Driver side squib 2nd step malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib 2nd step)
  • Center airbag sensor assembly
B1812/53
  • The center airbag sensor assembly receives a short circuit to ground signal in the driver side squib 2nd step circuit.
  • Driver side squib 2nd step malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib 2nd step)
  • Center airbag sensor assembly
B1813/53
  • The center airbag sensor assembly receives a short circuit to B+ signal in the driver side squib 2nd step circuit.
  • Driver side squib 2nd step malfunction
  • Spiral cable malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Spiral cable
  • Steering pad (Driver side squib 2nd step)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 196: Drive Side Squib - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 197: Identifying Spiral Cable
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the steering pad, spiral cable and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the steering pad, spiral cable and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the spiral cable connector (on the steering pad side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short springs for the instrument panel wire and spiral cable with the activation prevention mechanism are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)
    1. Connect the instrument panel wire to the center airbag sensor assembly and spiral cable.

      Fig. 198: Identifying Steering Pad (Driver Side Squib 2nd Step)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector E (black connector).

      WARNING:

      Never connect the tester to the steering pad (driver side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1810, B1811, B1812, B1813 or 53 is not output.

      HINT:

      Codes other than DTCs B1810, B1811, B1812, B1813 and 53 may be output at this time, but they are not related to this check.

    NG --> See step 3

    OK --> REPLACE STEERING PAD

  3. CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT
    1. Turn the ignition switch off.

      Fig. 199: Identifying Driver Side Squib 2ND Step Circuit
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector E.
    4. Disconnect the instrument panel wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        z4-1 (D2-) - Body ground Ignition switch ON Below 1 V
        z4-2 (D2+) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z4-1 (D2-) - z4-2 (D2+) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z4-1 (D2-) - Body ground Always 1 Mohms or higher
        z4-2 (D2+) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z4-1 (D2-) - z4-2 (D2+) Always 1 Mohms or higher

    NG --> See step 5

    OK: Go to next step

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 200: Connectors To The Steering Pad And The Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the steering pad and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1810, B1811, B1812, B1813 or 53 is not output.

      HINT:

      Codes other than DTCs B1810, B1811, B1812, B1813 and 53 may be output at this time, but they are not related to this check.

    NG --> See step 7

    OK --> See step 8

  5. CHECK INSTRUMENT PANEL WIRE
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 201: Identifying Instrument Panel Wire
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the instrument panel wire from the spiral cable.
    3. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        D15-4 (D2+) - Body ground Ignition switch ON Below 1 V
        D15-3 (D2-) - Body ground Ignition switch ON Below 1 V

    4. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D15-4 (D2+) - D15-3 (D2-) Always Below 1 ohms

    5. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D15-4 (D2+) - Body ground Always 1 Mohms or higher
        D15-3 (D2-) - Body ground Always 1 Mohms or higher

    6. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D15-4 (D2+) - D15-3 (D2-) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK: Go to next step

  6. CHECK SPIRAL CABLE
    1. Check for a short to B+ in the circuit.

      Fig. 202: Identifying Spiral Cable
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        z4-1 (D2-) - Body ground Ignition switch ON Below 1 V
        z4-2 (D2+) - Body ground Ignition switch ON Below 1 V

    2. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z4-1 (D2-) - z4-2 (D2+) Always Below 1 ohms

    3. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z4-1 (D2-) - Body ground Always 1 Mohms or higher
        z4-2 (D2+) - Body ground Always 1 Mohms or higher

    4. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector D, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        z4-1 (D2-) - z4-2 (D2+) Always 1 Mohms or higher

    NG --> See step 9

    OK --> See step 8

  7. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  8. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  9. REPLACE SPIRAL CABLE. Refer to REMOVAL

DTC B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54: Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54: Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54: Short to B+ in Front Passenger Side Squib 2nd Step Circuit

DESCRIPTION

The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and front passenger airbag assembly.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front passenger side squib 2nd step circuit.

DTC No. DTC Detection Condition Trouble Area
B1815/54
  • The center airbag sensor assembly receives a line short circuit signal in the front passenger side squib 2nd step circuit during primary check.
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
B1816/54
  • The center airbag sensor assembly receives an open circuit signal in the front passenger side squib 2nd step circuit.
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
B1817/54
  • The center airbag sensor assembly receives a short circuit to ground signal in the front passenger side squib 2nd step circuit.
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
B1818/54
  • The center airbag sensor assembly receives a short circuit to B+ signal in the front passenger side squib 2nd step circuit.
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • No. 2 instrument panel wire
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 203: Front Passenger Side Squib 2nd Step - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 204: Identifying Instrument Panel Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the front passenger airbag assembly and center airbag sensor assembly. Also check that the connectors that link the No. 2 instrument panel wire and instrument panel wire are properly connected.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the front passenger airbag assembly and center airbag sensor assembly. Also disconnect the instrument panel wire from the No. 2 instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the No. 2 instrument panel wire connector (on the front passenger airbag assembly side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short springs for the No. 2 instrument panel wire and instrument panel wire with the activation prevention mechanism are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB 2ND STEP)
    1. Connect the instrument panel wire to the No. 2 instrument panel wire and center airbag sensor assembly.

      Fig. 205: Identifying Passenger Airbag Assembly (Front Passenger Side Squib 2nd Step)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector E (black connector).

      WARNING:

      Never connect the tester to the front passenger airbag assembly (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1815, B1816, B1817, B1818 or 54 is not output.

      HINT:

      Codes other than DTCs B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

    NG --> See step 4

    OK --> See step 3

  3. REPLACE FRONT PASSENGER AIRBAG ASSEMBLY. Refer to REMOVAL
  4. CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT
    1. Turn the ignition switch off.

      Fig. 206: Identifying Front Passenger Side Squib 2ND Step Circuit
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector E.
    4. Disconnect the instrument panel wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        e1-2 (P2+) - Body ground Ignition switch ON Below 1 V
        e1-1 (P2-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - e1-1 (P2-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - Body ground Always 1 Mohms or higher
        e1-1 (P2-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - e1-1 (P2-) Always 1 Mohms or higher

    NG --> See step 6

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 207: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the front passenger airbag assembly and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1815, B1816, B1817, B1818 or 54 is not output.

      HINT:

      Codes other than DTCs B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

    NG --> See step 8

    OK --> See step 9

  6. CHECK INSTRUMENT PANEL WIRE
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 208: Identifying Instrument Panel Wire
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the No. 2 instrument panel wire from the instrument panel wire.
    3. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        De1-3 (P2+) - Body ground Ignition switch ON Below 1 V
        De1-4 (P2-) - Body ground Ignition switch ON Below 1 V

    4. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-3 (P2+) - De1-4 (P2-) Always Below 1 ohms

    5. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-3 (P2+) - Body ground Always 1 Mohms or higher
        De1-4 (P2-) - Body ground Always 1 Mohms or higher

    6. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-3 (P2+) - De1-4 (P2-) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK: Go to next step

  7. CHECK NO. 2 INSTRUMENT PANEL WIRE
    1. Check for a short to B+ in the circuit.

      Fig. 209: Checking Instrument Panel Wire Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        e1-2 (P2+) - Body ground Ignition switch ON Below 1 V
        e1-1 (P2-) - Body ground Ignition switch ON Below 1 V

    2. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - e1-1 (P2-) Always Below 1 ohms

    3. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - Body ground Always 1 Mohms or higher
        e1-1 (P2-) - Body ground Always 1 Mohms or higher

    4. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector D, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - e1-1 (P2-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK --> See step 9

  8. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  9. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1820/55: Short in Side Squib RH Circuit; DTC B1821/55: Open in Side Squib RH Circuit; DTC B1822/55: Short to GND in Side Squib RH Circuit; DTC B1823/55: Short to B+ in Side Squib RH Circuit

DESCRIPTION

The side squib RH circuit consists of the center airbag sensor assembly and front seat airbag assembly RH.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the side squib RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1820/55
  • The center airbag sensor assembly receives a line short circuit signal in the side squib RH circuit during primary check.
  • Side squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat airbag assembly RH (Side squib RH)
  • Center airbag sensor assembly
B1821/55
  • The center airbag sensor assembly receives an open circuit signal in the side squib RH circuit.
  • Side squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat airbag assembly RH (Side squib RH)
  • Center airbag sensor assembly
B1822/55
  • The center airbag sensor assembly receives a short circuit to ground signal in the side squib RH circuit.
  • Side squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat airbag assembly RH (Side squib RH)
  • Center airbag sensor assembly
B1823/55
  • The center airbag sensor assembly receives a short circuit to B+ signal in the side squib RH circuit.
  • Side squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat airbag assembly RH (Side squib RH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 210: Identifying Front Seat Airbag Assembly Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 211: Identifying Floor Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the front seat airbag assembly RH and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the front seat airbag assembly RH and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the short spring for the floor wire with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  2. CHECK FRONT SEAT AIRBAG ASSEMBLY RH (SIDE SQUIB RH)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 212: Identifying Front Seat Airbag Assembly RH (Side Squib RH)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the front seat airbag assembly RH (side squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1820, B1821, B1822, B1823 or 55 is not output.

      HINT:

      Codes other than DTCs B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.

    NG --> See step 4

    OK --> See step 3

  3. REPLACE FRONT SEAT AIRBAG ASSEMBLY RH. Refer to REMOVAL
  4. CHECK FLOOR WIRE (SIDE SQUIB RH CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 213: Identifying Floor Wire (Side Squib RH Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector C.
    4. Disconnect the floor wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        N5-1 (SFR+) - Body ground Ignition switch ON Below 1 V
        N5-2 (SFR-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N5-1 (SFR+) - N5-2 (SFR-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N5-1 (SFR+) - Body ground Always 1 Mohms or higher
        N5-2 (SFR-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N5-1 (SFR+) - N5-2 (SFR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 214: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the front seat airbag assembly RH and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1820, B1821, B1822, B1823 or 55 is not output.

      HINT:

      Codes other than DTCs B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.

    NG --> See step 6

    OK --> See step 7

  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1825/56: Short in Side Squib LH Circuit; DTC B1826/56: Open in Side Squib LH Circuit; DTC B1827/56: Short to GND in Side Squib LH Circuit; DTC B1828/56: Short to B+ in Side Squib LH Circuit

DESCRIPTION

The side squib LH circuit consists of the center airbag sensor assembly and front seat airbag assembly LH.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the side squib LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1825/56
  • The center airbag sensor assembly receives a line short circuit signal in the side squib LH circuit during primary check.
  • Side squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat airbag assembly LH (Side squib LH)
  • Center airbag sensor assembly
B1826/56
  • The center airbag sensor assembly receives an open circuit signal in the side squib LH circuit.
  • Side squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat airbag assembly LH (Side squib LH)
  • Center airbag sensor assembly
B1827/56
  • The center airbag sensor assembly receives a short circuit to ground signal in the side squib LH circuit.
  • Side squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat airbag assembly LH (Side squib LH)
  • Center airbag sensor assembly
B1828/56
  • The center airbag sensor assembly receives a short circuit to B+ signal in the side squib LH circuit.
  • Side squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat airbag assembly LH (Side squib LH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 215: Identifying Airbag Sensor Assembly Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 216: Identifying Floor Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the front seat airbag assembly LH and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the front seat airbag assembly LH and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  2. CHECK FRONT SEAT AIRBAG ASSEMBLY LH (SIDE SQUIB LH)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 217: Identifying Front Seat Airbag Sensor Assembly LH (Side Squib)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the front seat airbag assembly LH (side squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      RESULT
      Result Proceed to
      DTC B1825, B1826, B1827, B1828 or 56 is output. A
      DTC B1825, B1826, B1827, B1828 or 56 is not output. (for Power Seat) B
      DTC B1825, B1826, B1827, B1828 or 56 is not output. (for Manual Seat) C

      HINT:

      Codes other than DTCs B1825, B1826, B1827, B1828 and 56 may be output at this time, but they are not related to this check.

    B --> See step 3

    C --> See step 8

    A: Go to next step

  3. REPLACE FRONT SEAT AIRBAG ASSEMBLY LH. Refer to REMOVAL
  4. CHECK NO. 2 FLOOR WIRE (SIDE SQUIB LH CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 218: Identifying NO. 2 Floor Wire (Side Squib LH Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector C.
    4. Disconnect the No. 2 floor wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        O5-1 (SFL+) - Body ground Ignition switch ON Below 1 V
        O5-2 (SFL-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O5-1 (SFL+) - O5-2 (SFL-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O5-1 (SFL+) - Body ground Always 1 Mohms or higher
        O5-2 (SFL-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O5-1 (SFL+) - O5-2 (SFL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 219: Connectors To The Front Seat Side Airbag Assembly LH And The Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the front seat airbag assembly LH and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1825, B1826, B1827, B1828 or 56 is not output.

      HINT:

      Codes other than DTCs B1825, B1826, B1827, B1828 and 56 may be output at this time, but they are not related to this check.

    NG --> See step 6

    OK --> See step 7

  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  8. REPLACE FRONT SEAT AIRBAG ASSEMBLY LH. Refer to REMOVAL

DTC B1830/57: Short in Curtain Shield Squib RH Circuit; DTC B1831/57: Open in Curtain Shield Squib RH Circuit; DTC B1832/57: Short to GND in Curtain Shield Squib RH Circuit; DTC B1833/57: Short to B+ in Curtain Shield Squib RH Circuit

DESCRIPTION

The curtain shield squib RH circuit consists of the center airbag sensor assembly and curtain shield airbag assembly RH.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the curtain shield squib RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1830/57
  • The center airbag sensor assembly receives a line short circuit signal in the curtain shield squib RH circuit during primary check.
  • Curtain shield squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Curtain shield airbag assembly RH (Curtain shield squib RH)
  • Center airbag sensor assembly
B1831/57
  • The center airbag sensor assembly receives an open circuit signal in the curtain shield squib RH circuit.
  • Curtain shield squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Curtain shield airbag assembly RH (Curtain shield squib RH)
  • Center airbag sensor assembly
B1832/57
  • The center airbag sensor assembly receives a short circuit to ground signal in the curtain shield squib RH circuit.
  • Curtain shield squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Curtain shield airbag assembly RH (Curtain shield squib RH)
  • Center airbag sensor assembly
B1833/57
  • The center airbag sensor assembly receives a short circuit to B+ signal in the curtain shield squib RH circuit.
  • Curtain shield squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Curtain shield airbag assembly RH (Curtain shield squib RH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 220: Identifying Airbag Assembly Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 221: Identifying Floor Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the curtain shield airbag assembly RH and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the curtain shield airbag assembly RH and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the floor wire connector (on the curtain shield airbag assembly RH side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short spring for the floor wire with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  2. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY RH (CURTAIN SHIELD SQUIB RH)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 222: Identifying Curtain Shield Airbag Assembly RH (Curtain Shield Squib RH)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the curtain shield airbag assembly RH (curtain shield squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1830, B1831, B1832, B1833 or 57 is not output.

      HINT:

      Codes other than DTCs B1830, B1831, B1832, B1833 and 57 may be output at this time, but they are not related to this check.

    NG --> See step 4

    OK --> See step 3

  3. REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH. Refer to REMOVAL
  4. CHECK FLOOR WIRE (CURTAIN SHIELD SQUIB RH CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 223: Identify Floor Wire (Curtain Shield Squib RH Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector C.
    4. Disconnect the floor wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        N9-1 (ICR+) - Body ground Ignition switch ON Below 1 V
        N9-2 (ICR-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N9-1 (ICR+) - N9-2 (ICR-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N9-1 (ICR+) - Body ground Always 1 Mohms or higher
        N9-2 (ICR-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N9-1 (ICR+) - N9-2 (ICR-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 224: Identify Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the curtain shield airbag assembly RH and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1830, B1831, B1832, B1833 or 57 is not output.

      HINT:

      Codes other than DTCs B1830, B1831, B1832, B1833 and 57 may be output at this time, but they are not related to this check.

    NG --> See step 6

    OK --> See step 7

  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1835/58: Short in Curtain Shield Squib LH Circuit; DTC B1836/58: Open in Curtain Shield Squib LH Circuit; DTC B1837/58: Short to GND in Curtain Shield Squib LH Circuit; DTC B1838/58: Short to B+ in Curtain Shield Squib LH Circuit

DESCRIPTION

The curtain shield squib LH circuit consists of the center airbag sensor assembly and curtain shield airbag assembly LH.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the curtain shield squib LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1830/57
  • The center airbag sensor assembly receives a line short circuit signal in the curtain shield squib LH circuit during primary check.
  • Curtain shield squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Curtain shield airbag assembly LH (Curtain shield squib LH)
  • Center airbag sensor assembly
B1831/57
  • The center airbag sensor assembly receives an open circuit signal in the curtain shield squib LH circuit.
  • Curtain shield squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Curtain shield airbag assembly LH (Curtain shield squib LH)
  • Center airbag sensor assembly
B1832/57
  • The center airbag sensor assembly receives a short circuit to ground signal in the curtain shield squib LH circuit.
  • Curtain shield squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Curtain shield airbag assembly LH (Curtain shield squib LH)
  • Center airbag sensor assembly
B1833/57
  • The center airbag sensor assembly receives a short circuit to B+ signal in the curtain shield squib LH circuit.
  • Curtain shield squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Curtain shield airbag assembly LH (Curtain shield squib LH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 225: Identifying Airbag Assembly Sensors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 226: Identifying Floor Wire Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the curtain shield airbag assembly LH and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the curtain shield airbag assembly LH and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the No. 2 floor wire connector (on the curtain shield airbag assembly LH side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  2. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY LH (CURTAIN SHIELD SQUIB LH)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 227: Identifying Curtain Shield Airbag Assembly LH (Curtain Shield Squib LH)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the curtain shield airbag assembly LH (curtain shield squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1835, B1836, B1837, B1838 or 58 is not output.

      HINT:

      Codes other than DTCs B1835, B1836, B1837, B1838 and 58 may be output at this time, but they are not related to this check.

    NG --> See step 4

    OK --> See step 3

  3. REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY LH. Refer to REMOVAL
  4. CHECK NO. 2 FLOOR WIRE (CURTAIN SHIELD SQUIB LH CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 228: Identifying No. 2 Floor Wire (Curtain Shield Squib LH Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector C.
    4. Disconnect the No. 2 floor wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        O12-1 (ICL+) - Body ground Ignition switch ON Below 1 V
        O12-2 (ICL-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O12-1 (ICL+) - O12-2 (ICL-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O12-1 (ICL+) - Body ground Always 1 Mohms or higher
        O12-2 (ICL-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O12-1 (ICL+) - O12-2 (ICL-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 229: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the curtain shield airbag assembly LH and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1835, B1836, B1837, B1838 or 58 is not output.

      HINT:

      Codes other than DTCs B1835, B1836, B1837, B1838 and 58 may be output at this time, but they are not related to this check.

    NG --> See step 6

    OK --> See step 7

  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1860/64: Short in Driver Side Knee Airbag Squib Circuit; DTC B1861/64: Open in Driver Side Knee Airbag Squib Circuit; DTC B1862/64: Short to GND in Driver Side Knee Airbag Squib Circuit; DTC B1863/64: Short to B+ in Driver Side Knee Airbag Squib Circuit

DESCRIPTION

The driver side knee airbag squib circuit consists of the center airbag sensor assembly and driver side knee airbag assembly.

The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the driver side knee airbag squib circuit.

DTC No. DTC Detection Condition Trouble Area
B1860/64
  • The center airbag sensor assembly receives a line short circuit signal in the driver side knee airbag squib circuit during primary check.
  • Driver side knee airbag squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag assembly (Driver side knee airbag squib)
  • Center airbag sensor assembly
B1861/64
  • The center airbag sensor assembly receives an open circuit signal in the driver side knee airbag squib circuit.
  • Driver side knee airbag squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag assembly (Driver side knee airbag squib)
  • Center airbag sensor assembly
B1862/64
  • The center airbag sensor assembly receives a short circuit to ground signal in the driver side knee airbag squib circuit.
  • Driver side knee airbag squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag assembly (Driver side knee airbag squib)
  • Center airbag sensor assembly
B1863/64
  • The center airbag sensor assembly receives a short circuit to B+ signal in the driver side knee airbag squib circuit.
  • Driver side knee airbag squib malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Driver side knee airbag assembly (Driver side knee airbag squib)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 230: Drive Side Knee Airbag Squib - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 231: Identifying Instrument Panel Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the driver side knee airbag assembly and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the driver side knee airbag assembly and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the instrument panel wire connector (on the driver side knee airbag assembly side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short spring for the instrument panel wire with the activation prevention mechanism are not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK: Go to next step

  2. CHECK DRIVER SIDE KNEE AIRBAG ASSEMBLY (DRIVER SIDE KNEE AIRBAG SQUIB)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 232: Identifying Driver Side Knee Airbag Assembly (Driver Side Knee Airbag Squib)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the driver side knee airbag assembly (driver side knee airbag squib) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1860, B1861, B1862, B1863 or 64 is not output.

      HINT:

      Codes other than DTCs B1860, B1861, B1862, B1863 and 64 may be output at this time, but they are not related to this check.

    NG --> See step 3

    OK --> See step 6

  3. CHECK INSTRUMENT PANEL WIRE (DRIVER SIDE KNEE AIRBAG SQUIB CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 233: Identifying Instrument Panel Wire (Driver Side Knee Airbag Squib Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the SST from connector C.
    4. Disconnect the instrument panel wire from center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        D29-1 (DK+) - Body ground Ignition switch ON Below 1 V
        D29-2 (DK-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D29-1 (DK+) - D29-2 (DK-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D29-1 (DK+) - Body ground Always 1 Mohms or higher
        D29-2 (DK-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        D29-1 (DK+) - D29-2 (DK-) Always 1 Mohms or higher

    NG --> REPLACE INSTRUMENT PANEL WIRE

    OK: Go to next step

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 234: Connectors To The Driver Side Knee Airbag Assembly And The Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the driver side knee airbag assembly and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1860, B1861, B1862, B1863 or 64 is not output.

      HINT:

      Codes other than DTCs B1860, B1861, B1862, B1863 and 64 may be output at this time, but they are not related to this check.

    NG --> See step 7

    OK --> See step 5

  5. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
  6. REPLACE DRIVER SIDE KNEE AIRBAG ASSEMBLY. Refer to REMOVAL
  7. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL

DTC B1900/73: Short in Front Pretensioner Squib RH Circuit; DTC B1901/73: Open in Front Pretensioner Squib RH Circuit; DTC B1902/73: Short to GND in Front Pretensioner Squib RH Circuit; DTC B1903/73: Short to B+ in Front Pretensioner Squib RH Circuit

DESCRIPTION

The front pretensioner squib RH circuit consists of the center airbag sensor assembly and front seat outer belt assembly RH.

The center airbag sensor assembly uses this circuit to deploy the seat belt pretensioner when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front pretensioner squib RH circuit.

DTC No. DTC Detection Condition Trouble Area
B1900/73
  • The center airbag sensor assembly receives a line short circuit signal in the front pretensioner squib RH circuit during primary check.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front pretensioner squib RH)
  • Center airbag sensor assembly
B1901/73
  • The center airbag sensor assembly receives an open circuit signal in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front pretensioner squib RH)
  • Center airbag sensor assembly
B1902/73
  • The center airbag sensor assembly receives a short circuit to ground signal in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front pretensioner squib RH)
  • Center airbag sensor assembly
B1903/73
  • The center airbag sensor assembly receives a short circuit to B+ signal in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Center airbag sensor assembly malfunction
  • Floor wire
  • Front seat outer belt assembly RH (Front pretensioner squib RH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 235: Identifying Front Seat Outer Belt Assembly RH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 236: Identifying Floor Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the front seat outer belt assembly RH and center airbag sensor assembly.

      OK

      The connectors are properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the front seat outer belt assembly RH and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the floor wire connector (on the front seat outer belt assembly RH side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short spring for the floor wire with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  2. CHECK FRONT SEAT OUTER BELT ASSEMBLY RH (FRONT PRETENSIONER SQUIB RH)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 237: Identifying Front Seat Outer Belt Assembly RH (Front Pretensioner Squib RH)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the front seat outer belt assembly RH (front pretensioner squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1900, B1901, B1902, B1903 or 73 is not output.

      HINT:

      Codes other than DTCs B1900, B1901, B1902, B1903 and 73 may be output at this time, but they are not related to this check.

    NG --> See step 4

    OK --> See step 3

  3. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH. Refer to REMOVAL
  4. CHECK FLOOR WIRE (FRONT PRETENSIONER SQUIB RH CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 238: Identifying Floor Wire (Front Pretensioner Squib RH Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector C.
    4. Disconnect the floor wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        N4-1 (R+) - Body ground Ignition switch ON Below 1 V
        N4-2 (R-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N4-1 (R+) - N4-2 (R-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N4-1 (R+) - Body ground Always 1 Mohms or higher
        N4-2 (R-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        N4-1 (R+) - N4-2 (R-) Always 1 Mohms or higher

    NG --> REPLACE FLOOR WIRE

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 239: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the front seat outer belt assembly RH and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1900, B1901, B1902, B1903 or 73 is not output.

      HINT:

      Codes other than DTCs B1900, B1901, B1902, B1903 and 73 may be output at this time, but they are not related to this check.

    NG --> See step 6

    OK --> See step 7

  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

DTC B1905/74: Short in Front Pretensioner Squib LH Circuit; DTC B1906/74: Open in Front Pretensioner Squib LH Circuit; DTC B1907/74: Short to GND in Front Pretensioner Squib LH Circuit; DTC B1908/74: Short to B+ in Front Pretensioner Squib LH Circuit

DESCRIPTION

The front pretensioner squib LH circuit consists of the center airbag sensor assembly and front seat outer belt assembly LH.

The center airbag sensor assembly uses this circuit to deploy the seat belt pretensioner when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front pretensioner squib LH circuit.

DTC No. DTC Detection Condition Trouble Area
B1905/74
  • The center airbag sensor assembly receives a line short circuit signal in the front pretensioner squib LH circuit during primary check.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat outer belt assembly LH (Front pretensioner squib LH)
  • Center airbag sensor assembly
B1906/74
  • The center airbag sensor assembly receives an open circuit signal in the front pretensioner squib LH circuit.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat outer belt assembly LH (Front pretensioner squib LH)
  • Center airbag sensor assembly
B1907/74
  • The center airbag sensor assembly receives a short circuit to ground signal in the front pretensioner squib LH circuit.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat outer belt assembly LH (Front pretensioner squib LH)
  • Center airbag sensor assembly
B1908/74
  • The center airbag sensor assembly receives a short circuit to B+ signal in the front pretensioner squib LH circuit.
  • Front pretensioner squib LH malfunction
  • Center airbag sensor assembly malfunction
  • No. 2 floor wire
  • Front seat outer belt assembly LH (Front pretensioner squib LH)
  • Center airbag sensor assembly

WIRING DIAGRAM

Fig. 240: Identifying Front Pretensioner Squib LH Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:

  • Perform the simulation method by selecting check mode (Signal Check) with the Techstream, refer to CHECK MODE PROCEDURE .
  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road, refer to HOW TO PROCEED WITH TROUBLESHOOTING .

PROCEDURE

  1. CHECK CONNECTORS
    1. Turn the ignition switch off.

      Fig. 241: Identifying Floor Wire & Connectors
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the front seat outer belt assembly LH and center airbag sensor assembly.

      OK

      The connectors are not properly connected.

      HINT:

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the front seat outer belt assembly LH and center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the No. 2 floor wire connector (on the front seat outer belt assembly LH side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

      OK

      The short spring is not deformed or damaged.

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  2. CHECK FRONT SEAT OUTER BELT ASSEMBLY LH (FRONT PRETENSIONER SQUIB LH)
    1. Connect the connector to the center airbag sensor assembly.

      Fig. 242: Identifying Front Seat Outer Belt Assembly LH (Front Pretensioner Squib LH)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect SST (resistance 2.1 ohms) to connector C.

      WARNING:

      Never connect the tester to the front seat outer belt assembly LH (front pretensioner squib LH) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.

      • SST: 09843-18061
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1905, B1906, B1907, B1908 or 74 is not output.

      HINT:

      Codes other than DTCs B1905, B1906, B1907, B1908 and 74 may be output at this time, but they are not related to this check.

    NG --> See step 4

    OK --> See step 3

  3. REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH. Refer to REMOVAL
  4. CHECK NO. 2 FLOOR WIRE (FRONT PRETENSIONER SQUIB LH CIRCUIT)
    1. Turn the ignition switch off.

      Fig. 243: Identifying No. 2 Floor Wire (Front Pretensioner Squib LH Circuit)
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector C.
    4. Disconnect the No. 2 floor wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch to ON.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        O4-1 (L+) - Body ground Ignition switch ON Below 1 V
        O4-2 (L-) - Body ground Ignition switch ON Below 1 V

    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O4-1 (L+) - O4-2 (L-) Always Below 1 ohms

    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O4-1 (L+) - Body ground Always 1 Mohms or higher
        O4-2 (L-) - Body ground Always 1 Mohms or higher

    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        O4-1 (L+) - O4-2 (L-) Always 1 Mohms or higher

    NG --> REPLACE NO. 2 FLOOR WIRE

    OK: Go to next step

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
    1. Restore the released activation prevention mechanism of connector B to the original condition.

      Fig. 244: Identifying Center Airbag Sensor Assembly
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Connect the connectors to the front seat outer belt assembly LH and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory, refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1905, B1906, B1907, B1908 or 74 is not output.

      HINT:

      Codes other than DTCs B1905, B1906, B1907, B1908 and 74 may be output at this time, but they are not related to this check.

    NG --> See step 6

    OK --> See step 7

  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING

SRS Warning Light Remains ON

DESCRIPTION

The SRS warning light is located on the combination meter assembly.

When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition switch is turned from off to ON, and then goes off automatically.

If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.

When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking of the SRS warning light.

The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the center airbag sensor assembly in case the source voltage drops.

When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the voltage of the SRS to normal voltage.

A malfunction in this circuit is not recorded in the center airbag sensor assembly. The SRS warning light automatically goes off when the source voltage returns to normal.

The signal to illuminate the SRS warning light is transmitted from the center airbag sensor assembly to the combination meter assembly through the CAN communication system.

WIRING DIAGRAM

Fig. 245: Identifying Combination Meter Assembly Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK SRS WARNING LIGHT OPERATION
    1. Check the SRS warning light operation approximately 6 seconds after the ignition switch is turned to ON.

      Result

      SRS Warning Light Illumination Proceed to
      Remains on A
      Remains on after it goes off B

    B --> See step 6

    A: Go to next step

  2. CHECK BATTERY VOLTAGE
    1. Measure the voltage of the auxiliary battery.

      Standard voltage

      11 to 14 V

    NG --> See step 13

    OK: Go to next step

  3. CHECK CONNECTOR
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connector is properly connected to the center airbag sensor assembly.

      OK

      The connector is properly connected.

      HINT:

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    4. Disconnect the connector from the center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  4. CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - BODY GROUND)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 246: Identifying Center Airbag Sensor Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D30-21 (IG2) - Body ground Ignition switch ON 8 to 16 V

    5. Turn the ignition switch off.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D30-25 (E1) - Body ground Always Below 1 ohms
      D30-26 (E2) - Body ground Always Below 1 ohms

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  5. CHECK SRS WARNING LIGHT
    1. Turn the ignition switch to ON.
    2. Check the SRS warning light condition.

      OK

      After the primary check period, the SRS warning light goes off for approximately 10 seconds and remains on.

      HINT:

      The primary check is performed for approximately 6 seconds after the ignition switch is turned to ON.

    NG --> See step 15

    OK --> See step 14

  6. CHECK CAN COMMUNICATION SYSTEM
    1. Use the Techstream to check if the CAN communication system is functioning normally.

      HINT:

      • Refer to "Bus Check" for the CAN communication system (w/ Smart Key System), refer to DIAGNOSIS SYSTEM .
      • Refer to "Bus Check" for the CAN communication system (w/o Smart Key System), refer to DIAGNOSIS SYSTEM .
      • The center airbag sensor assembly is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

      Result

      Result Proceed to
      DTC is not output A
      DTC is output (w/ Smart Key System) B
      DTC is output (w/o Smart Key System) C

    B --> See step 16

    C --> See step 17

    A: Go to next step

  7. CHECK BATTERY VOLTAGE
    1. Measure the voltage of the auxiliary battery.

      Standard voltage

      11 to 14 V

    NG --> See step 13

    OK: Go to next step

  8. CHECK CONNECTOR
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connector is properly connected to the center airbag sensor assembly.

      OK

      The connector is properly connected.

      HINT:

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    4. Disconnect the connector from the center airbag sensor assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  9. CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - BODY GROUND)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 247: Identifying Center Airbag Sensor Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D30-21 (IG2) - Body ground Ignition switch ON 8 to 16 V

    5. Turn the ignition switch off.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D30-25 (E1) - Body ground Always Below 1 ohms
      D30-26 (E2) - Body ground Always Below 1 ohms

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  10. CHECK CONNECTOR
    1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    2. Check that the connector is properly connected to the combination meter assembly.

      OK

      The connector is properly connected.

      HINT:

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    3. Disconnect the connector from the combination meter assembly.
    4. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  11. CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 248: Identifying Combination Meter Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      E1-1 (IG+) - Body ground Ignition switch ON 11 to 14 V
      E1-21 (B) - Body ground Always 11 to 14 V
      E1-22 (B2) - Body ground Always 11 to 14 V

    4. Turn the ignition switch off.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E1-20 (ES) - Body ground Always Below 1 ohms
      E1-40 (E2) - Body ground Always Below 1 ohms

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  12. CHECK SRS WARNING LIGHT
    1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    2. Connect the connector to the combination meter assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON.
    5. Check the SRS warning light condition.

      OK

      After the primary check period, the SRS warning light goes off for approximately 10 seconds and remains on.

      HINT:

      The primary check is performed for approximately 6 seconds after the ignition switch is turned to ON.

    NG --> See step 15

    OK --> See step 14

  13. INSPECT AUXILIARY BATTERY. Refer to ON-VEHICLE INSPECTION
  14. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  15. REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL
  16. GO TO CAN COMMUNICATION SYSTEM. Refer to DIAGNOSIS SYSTEM
  17. GO TO CAN COMMUNICATION SYSTEM. Refer to DIAGNOSIS SYSTEM

SRS Warning Light does not Come ON

DESCRIPTION

The SRS warning light is located on the combination meter assembly.

When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition switch is turned from off to ON, and then goes off automatically.

If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.

When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking of the SRS warning light.

The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the center airbag sensor assembly in case the source voltage drops.

When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the voltage of the SRS to normal voltage.

A malfunction in this circuit is not recorded in the center airbag sensor assembly. The SRS warning light automatically goes off when the source voltage returns to normal.

The signal to illuminate the SRS warning light is transmitted from the center airbag sensor assembly to the combination meter assembly through the CAN communication system.

WIRING DIAGRAM

Fig. 249: Identifying Combination Meter Assembly Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK BATTERY VOLTAGE
    1. Measure the voltage of the auxiliary battery.

      Standard voltage

      11 to 14 V

    NG --> See step 5

    OK: Go to next step

  2. CHECK CONNECTOR
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connector is properly connected to the combination meter assembly.

      OK

      The connector is properly connected.

      HINT:

      If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

    4. Disconnect the connector from the combination meter assembly.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  3. CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)
    1. Connect the cable to the negative (-) battery terminal.

      Fig. 250: Identifying Combination Meter Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      E1-1 (IG+) - Body ground Ignition switch ON 11 to 14 V
      E1-21 (B) - Body ground Always 11 to 14 V
      E1-22 (B2) - Body ground Always 11 to 14 V

    4. Turn the ignition switch off.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E1-20 (ES) - Body ground Always Below 1 ohms
      E1-40 (E2) - Body ground Always Below 1 ohms

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  4. CHECK SRS WARNING LIGHT
    1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    2. Connect the connector to the combination meter assembly.
    3. Disconnect the connector from the center airbag sensor assembly.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to.
    6. Check the SRS warning light condition.

      OK

      After the primary check period, the SRS warning light goes off for approximately 10 seconds and remains on.

      HINT:

      The primary check is performed for approximately 6 seconds after the ignition switch is turned to ON.

    NG --> See step 7

    OK --> See step 6

  5. INSPECT AUXILIARY BATTERY. Refer to ON-VEHICLE INSPECTION
  6. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
  7. REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL

TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

DTCs are displayed by blinking of the SRS warning light.

HINT:

  • When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in an ECU connected to the TC circuit is suspected.
  • A DTC output mode signal is transmitted through the CAN communication system to each ECU including the center airbag sensor assembly. Thus when all systems do not enter DTC output mode, there may be an hybrid vehicle control ECU malfunction.

WIRING DIAGRAM

Fig. 251: Identifying Hybrid Vehicle Control ECU Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

PROCEDURE

  1. CHECK WIRE HARNESS (TC OF DLC3 - TC OF HYBRID VEHICLE CONTROL ECU)
    1. Turn the ignition switch off.

      Fig. 252: Identifying D47, TC And DLC3 Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    2. Disconnect the connector from the hybrid vehicle control ECU.

      Fig. 253: Identifying Wire Harness Connector Hybrid Vehicle Control ECU
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D47-13 (TC) - D72-11 (TC) Always Below 1 ohms

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  2. CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)
    1. Measure the resistance according to the value(s) in the table below.

      Fig. 254: Identifying D47, TC And DLC3 Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D47-4 (CG) - Body ground Always Below 1 ohms

    NG --> REPLACE WIRE HARNESS

    OK: Go to next step

  3. CHECK WIRE HARNESS (TC OF DCL3 - BODY GROUND)
    1. Measure the resistance according to the value(s) in the table below.

      Fig. 255: Identifying D47, TC And DLC3 Connector Terminals
      Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D47-13 (TC) - Body ground Always 1 Mohms or higher

    NG --> REPLACE WIRE HARNESS OR EACH ECU

    OK --> See step 4

  4. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to REMOVAL
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