• HEADINGS
  • Circuit Diagram
  • Control Unit Input Test
• FIGURES
  • Fig. 1: Reminder Systems - Circuit Diagram
  • Fig. 2: Identifying Under-Dash Fuse/Relay Box Connectors
  • Fig. 3: Identifying Gauge Control Module Connectors
• TABLES
  • TEST CONDITION REFERENCE CHART
  • TEST CONDITION REFERENCE CHART

2004-08 ACCESSORIES & EQUIPMENT

Reminder Systems - TSX

Circuit Diagram

Fig. 1: Reminder Systems - Circuit Diagram
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Control Unit Input Test

1. Before testing, troubleshoot the multiplex integrated control system using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

   Multiplex Integrated Control Unit

2. Remove the left kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).
3. Disconnect under-dash fuse/relay box connectors F, H and P.

   NOTE:

   All connectors are shown from the wire side of female terminals.

   Fig. 2: Identifying Under-Dash Fuse/Relay Box Connectors
   Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Inspect the connector and socket terminals to be sure they are all making good contact.
   • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
   • If the terminals are OK, go to step 5.
5. Reconnect the connectors, and make these input tests at the connector.
   • If any test indicates a problem, find and correct the cause, then recheck the system.
   • If all the input tests prove OK, go to step 6.

   TEST CONDITION REFERENCE CHART
   

   Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
   F14 H14	BLU/RED	Ignition switch ON (II), driver's seat belt is unbuckled.	Measure the voltage to ground: There should be less than 1 V.	Faulty driver's seat belt buckle switch Poor ground (G601) An open in the wire
   		Ignition switch ON (II), driver's seat belt is buckled.	Measure the voltage to ground: There should be 5 V or more.	Faulty driver's seat belt buckle switch Short to ground
   P13	RED/WHT*1 RED*2	Ignition key in the ignition switch	Measure the voltage to ground: There should be less than 1 V.	Faulty ignition switch Poor ground (G501) An open in the wire
   		Ignition key out of the ignition switch	Measure the voltage to ground: There should be 5 V or more.	Faulty ignition switch Short to ground

6. Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
7. Disconnect gauge control module connectors A and B.

   NOTE:

   All connectors are shown from the wire side of female terminals.

   Fig. 3: Identifying Gauge Control Module Connectors
   Courtesy of AMERICAN HONDA MOTOR CO., INC.

8. Inspect the connector and socket terminals to be sure they are all making good contact.
   • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
   • If the terminals are OK, go to step 9.
9. Reconnect the connectors, and make these input tests at the connector.
   • If any test indicates a problem, find and correct the cause, then recheck the system.
   • If the input tests prove OK, go to step 10.

   TEST CONDITION REFERENCE CHART
   

   Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
   A13	RED/WHT(1) RED(2)	Engine OFF	Check for continuity to ground: There should be continuity.	Faulty oil pressure switch An open in the wire
   		Engine running	Check for continuity to ground: There should be no continuity.	Mechanical problem in the engine Faulty oil pressure switch An open in the wire
   B9	BLK	Under all conditions	Measure the voltage to ground: There should be less than 1 V.	Poor ground (G501) An open in the wire
   (1) '04-05 models (2) '06-08 models

10. Perform the Gauge Self-diagnosis Function (see SELF-DIAGNOSTIC FUNCTION ).
    • If the beeper sounds and the seat belt reminder light flashes, go to step 11.
    • If the beeper does not sound or the seat belt reminder light does not flash, replace the gauge control module.
11. Substitute a known-good under-dash fuse/relay box and recheck the system.
    • If the symptom is gone, the multiplex integrated control unit (MICU) is faulty; replace the under-dash fuse/relay box.
    • If the symptom is still present, the gauge control module is faulty; replace the gauge control module.