Inspection And Verification
- Verify the customer concern.
- Visually inspect for obvious mechanical or electrical faults.VISUAL INSPECTION CHART
Mechanical Electrical - Engine oil level
- Cooling system coolant level
- Fuel level
- Fuel contamination/grade/quality
- Sensor installation/condition
- Viscous fan and solenoid
- Fuses
- Wiring harness
- Electrical connector(s)
- Sensor(s)
- 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.
- Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the symptom chart or DTC index.