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Home >> Fiat >> 2017 >> 500 Abarth, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 38 ((Transmission Control Module (TCM) - Electrical Diagnostics - 500)) >> DTC Troubleshooting >> U0077-00 Control Module Communication Bus Off >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

VERIFY THE DTC IS ACTIVE 

  1. Ignition on, engine not running.
  2. With the scan tool, read the DTCs.

    Is the DTC Active at this time?

    Yes 

    No