Exterior Lights (MICU) Input Test

Exterior Lights (MICU) Input Test

NOTE: Before performing the input tests, check the No. 1, No. 5, No. 15, No. 22, No. 24, No. 32, No. 34, No. 48, and No. 51 fuses in the under-dash fuse/relay box.

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

2. Remove the fuse access panel Fuse Access Panel Removal/Installation.

3. Disconnect under-dash fuse/relay box connectors A, B, C, K, M, N, Q, R, S, and W.

NOTE: All connector views 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 look OK, go to step 5.

5. With the connectors still disconnected, do these input tests at the following connectors.

- 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 7.









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

7. Reconnect the connectors to the under-dash fuse/relay box, and do these input tests at the following connectors.

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box Under-dash Fuse/Relay Box Removal And Installation (USA Models).