Reminder Systems (MICU And Gauge Control Module) Input Test

Reminder Systems (MICU and Gauge Control Module) Input Test

NOTE:

- Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
- Before testing, do the gauge control module self-diagnostic function Initial Inspection and Diagnostic Overview to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK.
- Before doing the input tests, check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box.

MICU

1. Turn the ignition switch to LOCK (0), and remove the driver's dashboard lower cover Driver's Dashboard Lower Cover Removal/Installation.

2. Disconnect under-dash fuse/relay box connectors D, E, F, G, R, S, and T.

NOTE: All connector views are shown from wire side of female terminals.






3. 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 look OK, go to step 4.

4. Reconnect the connectors to the under-dash fuse/relay box, do the following input tests.

- 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 5.














Gauge Control Module

5. Turn the ignition switch to LOCK (0).

6. Remove the gauge control module Service and Repair, and disconnect the 32P connector from it.





7. 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 look OK, go to step 8.

8. Reconnect the connector to the gauge control module, do the following input tests.

- 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 9.





9. If the lights-on reminder has a problem, substitute a known-good under-dash fuse/relay box, and recheck the system. If the seat belt reminder has a problem, check for SRS DTCs and check the seat belt buckle switch. If all the tests prove OK, go to step 10.

10. Substitute a known-good gauge control module, and recheck the system.

- If the symptom is gone, the gauge control module is faulty; replace it Service and Repair.
- If the symptom is still present, the MICU is faulty; replace the under-dash fuse/relay box Under-Dash Fuse/Relay Box Removal And Installation.