B1056

DTC Troubleshooting: B1056

DTC B1056:

Relay Control Module Lost Communication With MICU (Alarm 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 B1056 indicated?

YES -

Go to relay control module input test Relay Control Module Input Test.�

NO -

Intermittent failure, the communication line is OK at this time.�