B1001

DTC B1001, B1002: Multiplex Integrated Control Unit (MICU) Internal Error

1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF, and then back ON.
3. Operate the door lock (LOCK/UNLOCK).
4. Check for DTCs using the HDS.

Is DTC B1001 or B1002 indicated?

YES - Faulty MICU; replace the 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.