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Home >> Fiat >> 2012 >> 500 Pop, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 ((Transmission Control Module (TCM) - Electrical Diagnostics)) >> Diagnosis And Testing >> U0077-Control Module Communication Bus Off >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. 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 

      • Refer to  DIAGNOSIS AND TESTING  and perform the Stored Lost Communication DTCs diagnostic procedure.
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