B1958

DTC B1958: MICU-Rear Junction Box Unit Lost Communication with Combination Switch Control Unit (Wiper Switch 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 B1958 indicated?

YES - Go to step 5.

NO - Intermittent failure, the communication line is OK at this time. Check for loose or poor connections.

5. Check for DTCs with the HDS.

Are DTCs B1063, and B1156 also indicated?

YES - Go to the combination switch control unit input test. Combination Switch Control Unit Input Test

NO - Go to the MICU-rear junction box input test. MICU-Rear Junction Box Input Test