Inspection and Verification
- Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical and electrical damage.
VISUAL INSPECTION CHART
- Verify that the following systems are working correctly.
- Charging system
- Fuel system
- Engine oiling system
- Engine cooling system
- Vehicle speed control system
If the system(s) are not working correctly, refer to the appropriate article.
- Check the wiring harness for obvious signs of shorts, opens, bad connections, or damage.
- If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- Check that the program card is correctly installed.
- Check the connections to the vehicle.
- Check the ignition switch position.
- If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
- Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- SCP, ISO or UBP circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for the instrument cluster, Go To PINPOINT TEST A: NO COMMUNICATION WITH THE INSTRUMENT CLUSTER .
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the instrument cluster.
- If the DTCs retrieved are related to the concern, GO to the INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .