Module Communications Network

1. Verify the customer concern by operating the system in question.
2. Visually inspect for obvious signs of electrical damage.

VISUAL INSPECTION CHART

Electrical
^ Central Junction Box (CJB) Fuse 216 (15A)
^ Damaged wiring harness
^ Loose or corroded connections
^ Generic Electronic Module (GEM)
^ Data Link Connector (DLC)

3. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel 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

If the diagnostic tool still does not communicate with the vehicle, GO to Pinpoint Test H. Test H
4. GO to Pinpoint Test PC. Pinpoint Test PC (Precheck)