Multiplex Integrated Control System

DTC U1283: Driver's MICU Lost Communication with Passenger's MICU

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.

Is DTC U1283 Indicated?

YES - Go to the passenger's MICU input test, and do all power, ground, and communication input tests. MICU Input Test If the tests prove OK, replace the driver's under-dash fuse/relay box.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections at driver's under-dash fuse/relay box connector P (20P) and the related units.