Diagnostic Test

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.