Multiplex Integrated Control System MICU Input Test

Multiplex Integrated Control System MICU Input Test

NOTE: Before testing the MICU, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

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

2. Remove the left kick panel. Interior Trim Removal/Installation - Front Door Sill Area

3. Disconnect under-dash fuse/relay box connectors D, E, F, G, H, J, N, P, Q, W, and X.
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 6.













6. Reconnect the connectors, 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