B1007

DTC Troubleshooting: B1007

DTC B1007: MICU Lost Communication with 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. 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 ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1007 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the MICU and the combination switch control unit.


5. Check for DTCs with the HDS.

Are DTCs B1062, B1155, and B1957 also indicated with DTC B1007?
YES - Do the combination switch control unit input test. Wiper/Washer Switch (Combination Switch Control Unit) Input Test

NO - Do the MICU input test Multiplex Integrated Control System MICU Input Test.