Inspection and Verification

INSPECTION AND VERIFICATION

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. Verify the stoplamps operate correctly with the ignition switch in the OFF position. If the stoplamps do not operate correctly,
5. 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.

6. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
7. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- CAN circuits fault; all electronic control units no response/not equipped, refer to Information Bus (Module Communications Network).
- No response/not equipped for PCM, refer to Information Bus (Module Communications Network).
- No response/not equipped for anti-lock brake system (ABS) module, refer to Antilock Brakes/Traction Control Systems.
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the PCM, the LCM and the ABS module.

8. If the DTCs retrieved are related to the concern, go to the Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index, the Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index, or the Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index. Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index
9. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures

NOTE:
- For a master list of PCM DTCs, refer to Computers and Control Systems.
- For a master list of LCM and ABS module DTCs, refer to Body Control Systems (Multifunction Electronic Control Module).