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.
Visual Inspection
Mechanical Electrical Hydraulic - Damaged/stuck shift mechanism
- Damaged automatic transmission casing
- Blown fuse(s)
- Damaged, loose or corroded connectors
- Wiring harness
- Fluid level too high/low
- Poor condition of fluid
- Fluid leak
- 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.