B1178

DTC B1178: F-CAN Communication Line Error

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. Check for DTCs with the HDS.

Is DTCs B1168, B1169, B1170, B1173, and B1178 indicated?

YES - Troubleshooting the indicated DTCs.

NO - Intermittent failure, the F-CAN communication line is OK at this time. Check the F-CAN communication line for a short to ground.