Initial Inspection and Diagnostic Overview

Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.
1 Verify the customer concern.
2 Visually inspect for obvious signs of mechanical or electrical damage.





3 If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4 If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

DTC Index
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to A L L Diagnostic Trouble Codes ( DTC ). For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Climate Control Module (HVAC) Climate Control Module (HVAC)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Rear Climate Control Module (RHVAC) Rear Climate Control Module (RHVAC)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Climate Controlled Seat Module - Front/Rear (SCME/SCMF) Testing and Inspection