DTC Troubleshooting: B1001

DTC B1001:  MICU (CPU) Error

1.Clear the DTCs with the HDS.

2.Turn the ignition switch OFF, and then back ON (II).

3.Wait for 6 seconds or more.

4.Check for DTCs with the HDS.

Is DTC B1001 indicated?


YES - Faulty MICU; replace the under-dash fuse/relay box.n


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.n