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; U0164-00-LOST COMMUNICATION WITH HVAC CONTROL MODULE as Active?
  
  Yes
  - Refer to the BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX article and perform the U0164-00-LOST COMMUNICATION WITH HVAC CONTROL MODULE.
  No
  - Refer to DIAGNOSIS AND TESTING and perform the STORED LOST COMMUNICATION DTCs diagnostic procedure.