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Home >> Dodge and Ram >> 2011 >> Charger R/T, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Horns >> (Vehicle System Interface Module (VSIM) Module - Electrical Diagnostics) >> DTC Troubleshooting >> U0164-Lost Communication With HVAC Control Module >> Diagnostic Test
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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 U0164-00 diagnostic procedure.

      No 

      • Refer to  Diagnosis and Testing  .  and perform the Stored Lost Communication DTCs diagnostic procedure.
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