B1007

DTC Troubleshooting: 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 Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

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 (8P), and at driver's under-dash fuse/relay box connector X (39P). If the connections are good, check the battery condition Testing and Inspection and the charging system.�

5. Check for DTCs with the HDS.

Are DTCs B1062, B1155, B1555, and B1957 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, replace the MICU Under-Dash Fuse/Relay Box Removal and Installation. If the circuit is bad, repair the open.�