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DTC B1178: F-CAN Communication Circuit Error

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see 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. Check for DTCs with the HDS.

    Are DTCs B1168, B1169, B1170, B1173, B1178, B1185 and B1187 indicated? 

    YES  -Go to the indicated DTC's troubleshooting.

    NO  -Intermittent failure, the F-CAN communication line is OK at this time. Check for worn or shorted wires.