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 tested and/or the donor vehicle
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
MECHANICAL ELECTRICAL - Fluid level(s)
- Accessory installations
- Check for stuck/jammed switches and buttons
- Visibly damaged or worn components
- Loose or missing fasteners
- Fuse(s)
- Damage to wiring loom, incorrect location of wiring, wiring stretched or taught
- Loose or corroded electrical connector(s)
- Instrument cluster
- Central Junction Box (CJB)
- Engine Junction Box (EJB)
- Rear Junction Box (RJB)
- Driver Door Module (DDM)
- Passenger Door Module (PDM)
- Engine Control Module (ECM)
- Transmission Control Module (TCM)
- 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, verify the symptom and refer to the symptom chart