B1007

DTC B1007: MICU Lost Communication with the Combination Switch Control Unit (HLSW 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. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.

Is DTC B1007 indicated?

YES - Go to step 5.

NO - Intermittent failure, the MICU is OK at this time. Check for loose or poor connection at the combination switch control unit connector (12P), and at the under-dash fuse/relay box connector X (39P). If the connections are good, check the battery condition and the charging system.

5. Check for DTCs with the HDS.

Are DTCs B1062 and B1155 also 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, the MICU is faulty; replace the under-dash fuse/relay box. If the circuit is bad, repair the open.