Inspection And Verification
WARNING:
Servicing must be carried out by personnel familiar with both vehicle system and the charging and testing equipment. All operations must be carried out in a well ventilated area away from open flame and heat sources.
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 tested and/or the donor vehicle.
NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
- Verify the customer concern.
- Visually inspect for obvious signs of damage and system integrity.
Visual Inspection
Mechanical Electrical - Coolant level
- Hose(s)
- Coolant pump
- Control flap(s)
- Duct(s)
- Vent(s)
- Cabin air filter
- Drive belt
- Air conditioning compressor
- Thermostatic expansion valve
- Evaporator
- Receiver drier
- Air conditioning condenser
- Refrigerant pipes
- Auxiliary drive belt
- Fuel fired booster heater
- Fuel fired booster heater fuel pump
- Fuel fired booster heater fuel pipes
- Fuse(s)
- Wiring harness
- Electrical connectors
- Blower
- Air conditioning compressor
- Electric cooling fan
- Automatic Temperature Control Module (ATCM)
- Refrigerant pressure sensor
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.
- Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and carry out the recommendations as required