Inspection and Verification (Start Testing Here)

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) Fuses F37 (10A), F54 (10A)
^ Battery junction box (BJB) Fuses F6 (10A)
^ Wiring harness
^ Loose or corroded connections
^ Anti-lock brake control module
^ Air bag diagnostic monitor
^ TCM
^ PCM

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 that the correct version of the program card is installed.
^ check the connections to the vehicle.
^ check that you are connected to diagnostic connector C252 for all module diagnostics.
^ check that you are connected to DLC C2018 for OBDII diagnostics and power for the scan tool.
^ check the ignition switch position.

If the scan tool still does not communicate with the vehicle, go to Pinpoint Test F.

4. Go to Pinpoint Test PC. System Precheck