Module Communications Network

1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.

VISUAL INSPECTION CHART

Electrical
^ Central Junction Box (CJB) Fuse 5 (10A)
^ Damaged wiring harness
^ Loose or corroded connectors
^ 4-wheel anti-lock brake control module
^ Restraint Control Module (RCM)
^ Generic Electronic Module (GEM)/Central Timer Module (CTM)
^ Powertrain control module (PCM)
^ Parking aid module (PAM) (optional)
^ Remote Anti-theft Personality (RAP) module (optional)
^ Air suspension control module (optional)
^ Passive Anti-theft System (PATS) module
^ Driver Seat Module (DSM) (optional)
^ Electronic Automatic Temperature Control (EATC) module (optional)

3. If the concern remains after the 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 properly installed.
^ check the connections to the vehicle.
^ check the ignition switch position is in RUN.

If the scan tool still does not communicate with the vehicle, go to Pinpoint Test M. Test M: No Module/Network Communication - No Power to Scan Tool
4. Go to Pinpoint Test PC. Pinpoint Test PC (Precheck)