Fig. 1: Identifying Keyless/Power Door Locks/Security System Component Location (1 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 2: Identifying Keyless/Power Door Locks/Security System Component Location (2 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
The security alarm system is armed automatically after the doors, hood, and trunk are closed and locked. For the system to arm, the ignition switch must be off, the key must be removed, and the MICU must receive signals that the doors, hood, trunk are closed and locked. The alarm can be disarmed at any time by unlocking the driver's door with the key or pressing the UNLOCK button on the remote transmitter.
When everything is closed and locked, the only inputs that are grounded, and have 0 V, are the driver's door lock knob switch (LOCK position), and the integrated audio-HVAC display module. In other words, all of the other switches are open, and have about 0.8 V-5.0 V, including the key cylinder switches. The security indicator in the gauge control module begins to flash immediately after the vehicle is completely closed and locked, and 15 seconds later, the security system arms and the security indicator flashes on for a shorter amount of time than before. If the security indicator does not flash, the system is not arming. A beep sounds and parking lights flash to confirm the security alarm system is armed if the LOCK button is pressed a second time within 5 seconds.
If one of the switches is misadjusted or shorted internally, or there is a short in the circuit, the security system will not arm. As long as the control unit continues to receive a ground signal (0 V), it senses that the vehicle is not closed and locked, and the system will not arm. A switch that is slightly misadjusted can cause the alarm to sound for no apparent reason. In this case, a significant change in outside air temperature, the vibration of a passing truck, or someone bumping into the vehicle could cause the alarm to sound. There is no glass breakage or motion detector feature.
If anything is opened or improperly unlocked after the system is armed, the control unit receives a ground signal from that switch, and the 10 V reference drops to 0 V. If the integrated audio-HVAC display unit is disconnected, the input loses its ground, and the input voltage goes to 10 V. The system sounds the alarm when any of these occur:
When the system sounds the alarm, the horns sound and the exterior lights flash for 2 minutes. The alarm can be stopped at any time by unlocking the driver's door with the key or by pressing any button on the remote transmitter.
The panic mode sounds the alarm in order to attract attention. When the PANIC button on the remote transmitter is pressed and held for 2 seconds, the alarm sounds and the exterior lights flash for about 20 seconds.
The panic mode can be cancelled at anytime by pressing any button on the remote transmitter or by turning the ignition switch ON (II). The panic mode will not function if the ignition switch is ON (II).
The keyless entry system is integrated with the multiplex integrated control system. The multiplex integrated control unit (MICU) receives LOCK, UNLOCK and PANIC signals from the door multiplex control unit (keyless receiver).
The keyless entry system allows you to lock and unlock the vehicle with the remote transmitter. When you press the LOCK button, all doors lock. When you press the UNLOCK button once, only the driver's door unlocks. The other doors will unlock when you press the button a second time. The doors will not lock with the remote transmitter if a door is not fully closed, or if the key is in the ignition switch.
If the UNLOCK button is pressed, released, then pressed and held, the windows will begin to open. The windows stop if the button is released. See POWER WINDOWS for more information and troubleshooting.
When the switch for the ceiling light is in the center position, it will come on when the UNLOCK button is pressed. If a door is not opened, the light will go off in about 30 seconds, and the doors will relock. If the doors are locked with the remote transmitter within 30 seconds, the light will go off immediately.
Fig. 3: Keyless/Power Door Locks/Security System - Circuit Diagram (1 Of 3)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 4: Keyless/Power Door Locks/Security System - Circuit Diagram (2 Of 3)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 5: Keyless/Power Door Locks/Security System - Circuit Diagram (3 Of 3)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 6: Identifying Actuator 2P Connector Terminals (Driver's Door)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 7: Connecting Power And Ground Chart
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Fig. 8: Identifying Actuator 2P Connector Terminals (Passenger's Door)
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Fig. 9: Connecting Power And Ground Chart
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Fig. 10: Identifying Actuator 3P Connector Terminals (Driver's Door)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 11: Identifying Actuator 3P Connector Terminals (Passenger's Door)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig. 12: Identifying Actuator 3P Connector Terminals (Rear Door)
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Fig. 13: Identifying Key Cylinder Switch 3P Connector Terminal
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Multiplex Integrated Control Unit
NOTE:
All connectors are shown from the wire side of female terminals.
Fig. 14: Identifying Under-Dash Fuse/Relay Box Connectors
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TEST CONDITION REFERENCE CHART
Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
H9
BLK
Under all conditions
Check for continuity to ground:
There should be continuity.
F5
YEL/GRN
Connect F5 terminal to the battery positive terminal momentarily.
Check trunk lid opener operation:
Trunk lid should open.
K2
YEL/GRN
Connect the battery positive terminal to K12 (K2) terminal, and K2 (K12) terminal to H9 terminal.
Check actuator operation: The driver's door lock actuator should lock (unlock).
K12
YEL/BLK
N7
YEL/BLK
Connect the battery positive terminal to N7 (N9) terminal, and N9 (N7) terminal to H9 terminal.
Check actuator operation:
The front passenger's door lock actuator should lock (unlock).
N9
YEL
E2
YEL/BLK
Connect the battery positive terminal to E2 (E8) terminal, and E8 (E2) terminal to H9 terminal.
Check actuator operation:
The left rear door lock actuator should lock (unlock).
E8
YEL
H3
YEL/BLK
Connect the battery positive terminal to H3 (H10) terminal, and H10 (H3) terminal to H9 terminal.
Check actuator operation:
The right rear door lock actuator should lock (unlock).
H10
YEL
TEST CONDITION REFERENCE CHART
Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
Q8
BRN/WHT(1) BRIM(2)
Front passenger's door lock knob switch unlocked
Measure the voltage to ground:
There should be less than 1 V.
Front passenger's door lock knob switch locked
Measure the voltage to ground:
There should be 5 V or more.
P9
PNK/BLU(1) LT BLU(2)
Front passenger's door lock switch unlocked
Measure the voltage to ground:
There should be less than 1 V.
Front passenger's door lock switch in neutral
Measure the voltage to ground: There should be 5 V or more.
P25
PNK/BLU(1) PNK(2)
Front passenger's door lock switch locked
Measure the voltage to ground:
There should be less than 1 V.
Front passenger's door lock switch in neutral
Measure the voltage to ground:
There should be 5 V or more.
Q2
BLK/WHT(1) WHT(2)
Left rear door lock knob switch unlocked
Measure the voltage to ground:
There should be less than 1 V.
Left rear door lock knob switch locked
Measure the voltage to ground:
There should be 5 V or more.
Q3
BLK/RED(1) RED(2)
Right rear door lock knob switch unlocked
Measure the voltage to ground:
There should be less than 1 V.
Right rear door lock knob switch locked
Measure the voltage to ground: There should be 5V or more.
P11
BLU
Trunk lid opener main switch ON and trunk lid opener switch pushed
Measure the voltage to ground:
There should be less than 1 V.
Trunk lid opener main switch OFF and trunk lid opener switch released
Measure the voltage to ground:
There should be 5 V or more.
Q1
RED/WHT(3) GRN(4)
Under all conditions
Check for continuity to ground:
There should be continuity.
P13
RED/WHT(1) RED(2)
Ignition key inserted into the ignition switch.
Measure the voltage to ground:
There should be less than 1 V.
Ignition key removed from the ignition switch.
Measure the voltage to ground:
There should be 5 V or more.
E15
GRN
Driver's door open
Measure the voltage to ground:
There should be less than 1 V.
Driver's door closed
Measure the voltage to ground:
There should be 5 V or more.
H12
LT GRN/RED
Front passenger's door open
Measure the voltage to ground:
There should be less than 1 V.
Front passenger's door closed
Measure the voltage to ground:
There should be 5 V or more.
E14
GRN/YEL
Left rear door open
Measure the voltage to ground:
There should be less than 1 V.
Left rear door closed
Measure the voltage to ground:
There should be 5 V or more.
H13
GRN/WHT
Right rear door open
Measure the voltage to ground:
There should be less than 1 V.
Right rear door closed
Measure the voltage to ground:
There should be 5 V or more.
P24
BLU/BLK(1) BLU(2)
Trunk lid open
Measure the voltage to ground:
There should be less than 1 V.
Trunk lid closed
Measure the voltage to ground:
There should be 5 V or more.
(1)
'04-05 models
(2)
'06-08 models
(3)
'04 model
(4)
'05-08 models
Door Multiplex Control Unit
Fig. 15: Identifying Door Multiplex Control Unit Connector (23P) Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
TEST CONDITION REFERENCE CHART
Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result is not obtained
7
WHT/BLK
Driver's door lock knob switch unlocked
Measure the voltage to ground:
There should be less than 1 V.
Driver's door lock knob switch locked
Measure the voltage to ground:
There should be 5 V or more.
22
YEL/RED
Driver's door lock knob switch locked
Measure the voltage to ground:
There should be less than 1 V.
Driver's door lock knob switch unlocked
Measure the voltage to ground:
There should be 5 V or more.
21
WHT
Driver's door key cylinder switch in UNLOCK
Measure the voltage to ground:
There should be less than 1 V.
Driver's door key cylinder switch in neutral
Measure the voltage to ground:
There should be 5 V or more.
Driver's door key cylinder switch in LOCK
Measure the voltage to ground:
There should be 5 V or more.
8
WHT/RED
Driver's door key cylinder switch in LOCK
Measure the voltage to ground:
There should be less than 1 V.
Driver's door key cylinder switch in neutral
Measure the voltage to ground:
There should be 5 V or more.
Driver's door key cylinder switch in UNLOCK
Measure the voltage to ground:
There should be 5 V or more.
Is DTC B1026 indicated?
YES - Go to step 5.
NO - Intermittent failure. The passenger's door lock system is OK at this time. Check pinfits and connections.
Are both information indicators OFF?
YES - Go to step 7.
NO - Go to step 9.
Does the information show the correct ON and OFF indications when the door lock switch in the LOCK and UNLOCK positions?
YES - Intermittent failure, the switch, harness and MICU input circuits are OK at this time. Check pinfits and connections.
NO - Go to step 8.
Are the wire harnesses OK?
YES - Faulty passenger's door lock switch; replace it.
NO - An open in the wire, repair and recheck.
Are both information indicators OFF?
YES - Faulty passenger's door lock switch; replace it.
NO - Go to step 12.
Are the wire harnesses OK?
YES - Faulty MICU; replace it.
NO - A short in the wire, repair and recheck.
Is DTC B1127 indicated?
YES - Go to step 5.
NO - Intermittent failure. The driver's door key cylinder system is OK at this time. Check pinfits and connections.
Are both information indicators OFF?
YES - Go to step 7.
NO - Go to step 10.
Is the Driver's Door Key Cylinder Switch (LOCK) (Driver's Door Key Cylinder Switch (UNLOCK)) information indicator ON when the key cylinder is in the LOCK (UNLOCK) position, and OFF when the key is returned to the neutral position?
YES - Intermittent failure, the door multiplex control unit (power window master switch) is OK at this time. Check pinfits and connections.
NO - Go to step 8.
Fig. 16: Checking Continuity Between No. 3 And 1 Terminals Of Driver's Door Key Cylinder Switch 3P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Faulty driver's door key cylinder switch.
NO - Repair an open in the WHT/RED or WHT wire.
Are both information indicators OFF?
YES - Faulty driver's door key cylinder switch.
NO - Go to step 12.
Fig. 17: Checking Continuity Between No. 3 And 1 Terminals Of Driver's Door Key Cylinder Switch 3P Connector And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Repair a short in the WHT/RED or WHT wire.
NO - Faulty door multiplex control unit; replace the power window master switch.
Is DTC B1128 indicated?
YES - Go to step 5.
NO - Intermittent failure. The driver's door lock switch system is OK at this time. Check pinfits and connections.
Are both information indicators OFF?
YES - Go to step 7.
NO - Check the door lock switch. If the driver's door lock switch is OK, faulty door multiplex control unit; replace the power window master switch.
Is the Driver's Door Lock Switch (LOCK) (Driver's Door Lock Switch (UNLOCK)) information indicator ON when the door lock switch is pushed in each switch position, and OFF when the door lock switch is released?
YES - Intermittent failure, the door multiplex control unit (power window master switch) is OK at this time. Check pinfits and connections.
NO - Faulty door multiplex control unit; replace the power window master switch.
Is DTC B1129 indicated?
YES - Go to step 5.
NO - Intermittent failure. The driver's door lock knob switch system is OK at this time. Check pinfits and connections.
Check the ON/OFF information of the Driver's Door Lock Knob Switch (LOCK) and Driver's Door Lock Knob Switch (UNLOCK) in the DATA LIST.
is the Driver's Door Lock Knob Switch (LOCK) information indicator ON and Driver's Door Lock Knob Switch (UNLOCK) information indicator OFF with the door lock knob switch in LOCK position, and is the Driver's Door Lock Knob Switch (LOCK) information indicator OFF and Driver's Door Lock Knob Switch (UNLOCK) information indicator ON with the door lock knob switch in UNLOCK position?
YES - Intermittent failure, the door multiplex control unit (power window master switch) is OK at this time. Check pinfits and connections.
NO - Go to step 6.
Are both information indicators OFF?
YES - Faulty driver's door lock knob switch.
NO - Go to step 8.
Fig. 18: Checking Continuity Between No. 2 And 1 Terminals Of Driver's Door Lock Knob Switch 3P Connector And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Repair a short in the YEL/RED or WHT/BLK wire.
NO - Go to DRIVER'S DOOR LOCK KNOB SWITCH TEST . If the driver's door lock knob switch is OK, the door multiplex control unit is faulty; replace the power window master switch.
The security system stores information on the last tripped sensor if the security system has been violated. The information can be retrieved using the HDS.
To retrieve the last tripped sensor data:
Fig. 19: Identifying Trunk Lid Opener Main Switch 2P Connector Terminals
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Fig. 20: Identifying Trunk Latch Switch/Trunk Lock Actuator 3P Connector Terminal
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Fig. 21: Connecting Power And Ground Chart
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Fig. 22: Identifying Trunk Lid Opener Switch 2P Connector Terminals
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Passenger's Door Lock Switch
Fig. 23: Identifying Passenger's Door Lock Switch Connector Terminals
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Fig. 24: Identifying Keyless Buzzer 2P Connector Terminal With Hooks
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Fig. 25: Identifying Hood Switch 2P Connector Terminal
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NOTE:
Fig. 26: Identifying Transmitter Battery
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Storing transmitter codes:
The codes of up to three transmitters can be stored into the keyless receiver unit memory. (If a fourth code is stored, the code which was input first will be erased.)
NOTE:
It is important to maintain the time limits between the steps. Make sure the doors, the hood and the tailgate are closed.
Confirm that you can hear the sound of the door lock actuators after each transmitter code is stored.