B1255

DTC B1255: Combination Switch Control Unit Lost Communication with MICU (MICU 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 B1255 indicated?

YES - Go to step 5.

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

5. Check for DTCs with the HDS.

Are DTC B1055, B1157, B1605, B1806, B2107, and B2155 also indicated?

YES - Go to the MICU input test. MICU Input Test

NO - Go to the combination switch control unit input test. Combination Switch Control Unit Input Test