B1955

DTC Troubleshooting: B1955

DTC B1955: Rear MICU 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. 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 B1955 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the rear fuse/relay box and the MICU.


5. Check for DTCs with the HDS.

Are DTCs B1055, B1056, B1057, B1157, B1159, B1180, B1255, B1955, B2155, B2156, and/or B2161 indicated?
YES - Do the MICU input test. Multiplex Integrated Control System MICU Input Test

NO - Do the rear MICU input test. Rear MICU Input Test