B1057

DTC B1055: Relay Control Module Lost Communication with MICU (MICU message)

DTC B1057: Relay Control Module Lost Communication with MICU (DOORSW 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.

Are DTCs B1055 and/or B1057 indicated?

YES - Go to step 5.

NO - Intermittent failure, the relay control module 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.

NO - Do the relay control module input test. Component Tests and General Diagnostics