B1005

DTC Troubleshooting: B1005

DTC B1005: MICU Lost Communication with Relay Control Module (RM 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 B1005 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 relay control module.


5. Check for DTCs with the HDS.

Are DTCs B1158, B1959, B2162, and B2970 also indicated with B1005?
YES - Do the relay control module input test. Relay Control Module Input Test

NO - Do the MICU input test. Multiplex Integrated Control System MICU Input Test