B1007

DTC B1007: MICU Lost Communication with Combination Switch Control Unit (Headlight Switch Message)

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. Check for DTCs with the HDS.

Is DTC B1007 indicated?

YES - Go to step 4.

NO - Intermittent failure, the MICU is OK at this time. Check for loose or poor connection at combination switch control unit connector (8P), and at under-dash fuse/relay box connector X (39P). If the connections are good, check the battery condition and the charging system.

4. Check for DTCs with the HDS.

Are DTCs B1155 and B1062 indicated?

YES - Go to the Combination Switch Control Unit Input Test. Combination Switch Control Unit Input Test

NO - Check for an open in the communication circuit between the MICU and the combination switch control unit. If the circuit is OK, replace the MICU. If the circuit is bad, repair the open.