B1001

DTC B1001: Multiplex Integrated Control Unit (MICU) Internal Error (CPU Error)

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 OFF and then back ON (II).
3. Operate the door lock (LOCK/UNLOCK).
4. Check for DTCs with the HDS.

Is DTC B1001 indicated?

YES - Faulty MICU; replace the driver's under-dash fuse/relay box.

NO - Intermittent failure, the MICU is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition and the charging system.