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Home >> Dodge and Ram >> 2013 >> Charger SRT-8 >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> (Transmission Control Module (TCM) - Electrical Diagnostics - Nag1) >> DTC Troubleshooting >> U0164-Lost Communication With HVAC Control Module >> Diagnostic Test

Diagnostic Test

  1. VERIFY DTC IS ACTIVE 
    1. Turn the ignition on.
    2. With the scan tool, read the active DTCs.

      Does the scan tool display; U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE as Active?

      Yes 

      • Refer to DTC INDEX article and perform the U0164-Lost Communication with HVAC Control Module.

      No 

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