Communications Network

INSPECTION AND VERIFICATION

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

VISUAL INSPECTION CHART

Electrical
- Central Junction Box (CJB) Fuse 31 (5A)
- Damaged wiring harness
- Loose or corroded connections
- Anti-lock brake control module without traction control (optional)
- Anti-lock brake control module with traction control (optional)
- Generic Electronic Module (GEM)
- Restraint Control Module (RCM)
- Powertrain Control Module (PCM)
- Instrument cluster

3. If the concern remains after the inspection, connect diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from diagnostic tool menu. If diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check that the correct version of the program card is 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)