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 control (ABS) module
^ Electronic automatic temperature control (EATC) module
^ Passive anti-theft system (PATS) module
^ Natural gas vehicle module (NGVM)
^ Electronic crash sensor (ECS)
^ Driver door module (DDM)
^ Lighting control module (LCM)
^ 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 scan tool menu. If scan tool does not communicate with the vehicle:
^ check that the program card is properly installed.
^ check the connections to the vehicle.
^ check the ignition switch is in RUN position.

If the scan tool still will not communicate with the vehicle, refer to Module Communications Network (Information Bus).

3. Refer to the Symptom Chart. Module Configuration