Inspection and Verification

Visual Inspection Chart:

1. Visually inspect for the following obvious signs of mechanical and electrical damage.

2. 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 correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
3. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
4. Carry out the DATA LINK DIAGNOSTICS test. If the scan tool responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network.
^ NO RESP/NOT EQUIP for GEM, go to Pinpoint Test A.

^ Note: For Excursion, to carry out the GEM self-test requires the headlamps to be in the OFF position. All others require the headlamps to be in the ON position.

SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out the GEM self-test.
5. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
6. If no DTCs related to the concern are retrieved, carry out the electronic shift function test.