B1057

DTC Troubleshooting: B1055, B1057

DTC B1055:

Relay Control Module Lost Communication With MICU

DTC B1057:

Relay Control Module Lost Communication With MICU (Door Switch 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.

Are DTCs B1055 and/or B1057 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.�

5. Check for DTCs with the HDS.

B1055: Are DTCs B1106, B1157, and B1255 also indicated? B1057: Are DTCs B1105 and B1159 also indicated?

YES -

Do the MICU input test MICU Input Test.�

NO -

Do the relay control module input test Relay Control Module Input Test.�