B1255

DTC Troubleshooting: B1255

DTC B1255:

Combination Switch Control Unit Lost Communication With MICU

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 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 -

Do the MICU input test MICU Input Test.

NO -

Do the combination switch control unit input test Testing and Inspection.