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 mechanical or electrical damage.VISUAL INSPECTION
Mechanical Electrical - Gear selector lever cable adjustment (vehicles with automatic transmission)
- Starter motor
- Engine (turns freely)
- Battery
- Fuses
- Starter relay
- Wiring harness(es)
- Damaged, loose or corroded connectors
- Ignition switch
- Generator
- Powertrain Control Module (PCM)
- 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 , alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC INDEX .
- Check DDW for open campaigns. Refer to the corresponding bulletins and SSM's which may be valid for the specific customer complaint and carry out the recommendations as needed.