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, refer to Lighting and Horns to continue diagnosis of the stoplamps.
5. Verify the brake warning indicator operates correctly. If the brake warning indicator is not operating correctly, refer to Instrument Panel, Gauges and Warning Indicators to continue diagnosis of the brake warning indicator.
6. 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.

7. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
8. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- CAN, ISO or UBP circuit 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).
- 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.

9. If the DTCs retrieved are related to the concern, go to the Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index. Diagnostic Trouble Code Tests and Associated Procedures
10. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures

NOTE: DTC P0703 and DTC P1572 must be repaired before any other DTC.