Component Tests and General Diagnostics

Control Unit Input Test

1. Before testing, troubleshoot the multiplex integrated control system using B-CAN System Diagnosis Test Mode A.

Multiplex Integrated Control Unit

2. Remove the left kick panel.
- 2-door
- 4-door







3. Disconnect tire under-dash fuse/relay box connectors F and P.

NOTE: All connectors are wire side of female terminals.

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.

6. Remove the gauge control module.




7. Disconnect the gauge control module 30P ('03-05 models) or 36P ('06 model) connector.
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. With the connectors still disconnected, 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.




10. Reconnect the connector, 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 11.

11. Run the gauge control module Self-diagnostic Function.
- If the beeper sounds and the seatbelt light flashes, go to step 12.
- If the beeper does not sounds, or the seatbelt light does not flash, replace the gauge control module.

12. Substitute a known-good under-dash fuse/relay box and recheck the system.
- It the symptom is gone, the MICU is faulty; replace the under-dash fuse/relay box.
- It the symptom is still present, the gauge control module is faulty; replace the gauge control module.