B1012

DTC Troubleshooting: B1012

DTC B1012:

MICU Lost Communication with Rear MICU (RJU 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 to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1012 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 rear MICU.�

5. Check for DTCs with the HDS.

Is DTC B1955 indicated with DTC B1012?

YES -

Do the rear MICU input test Rear MICU Input Test.�

NO -

Do the MICU input test MICU Input Test.�