Exterior Lights (MICU) Input Test

Exterior Lights (MICU) 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 doing the input tests, check the No. 12, No. 13, No. 15, No. 16, No. 17, No. 18, No. 19, and No. 21 fuse in the under-dash fuse/relay box.

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

2. Remove the driver's dashboard lower cover Driver's Dashboard Lower Cover Removal/Installation.

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

NOTE: All connector views are shown from the 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 the following input tests:

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If the input tests prove OK, go to step 6.





6. Reconnect the connectors, then do the following input tests:

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