Inspection and Verification

1. Visually inspect for obvious signs of electrical damage. Refer to the chart:

VISUAL INSPECTION CHART

Electrical
^ Damaged wiring harness
^ Loose or corroded connectors
^ Anti-lock Brake Module (ABS)
^ Generic Electronic Module (GEM)
^ Overhead Trip Computer (OTC)
^ Electronic Crash Sensor (ECS)
^ Powertrain Control Module (PCM)

2. If the concern remains after inspection, connect the scan tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan 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 is in RUN position.

3. If the scan tool still does not communicate with the vehicle, refer to Module Communications Network. Testing and Inspection
4. Refer to the Symptom Chart. Module Configuration