Component Tests and General Diagnostics

Inspection and Verification

1. Verify the customer concern.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the WDS or equivalent Tester to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the WDS or equivalent Tester menu. If the WDS or equivalent Tester does not communicate with the vehicle:
1. check that the program card is correctly installed.
2. check the connections to the vehicle.
3. check the ignition switch position.

4. If the WDS or equivalent Tester still does not communicate with the vehicle, refer to the WDS or equivalent Tester manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the WDS or equivalent Tester responds with:
1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to MODULE CONFIGURATION.
2. NO RESP/NOT EQUIP for GEM, refer to SYMPTOM TROUBLESHOOTING CHART - GENERIC ELECTRONIC MODULE (GEM). Symptom Related Diagnostic Procedures
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the self-test diagnostics for the GEM.

6. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Diagnostic Trouble Code Descriptions
7. If no DTCs related to the concern are retrieved, proceed to the Troubleshooting Index to continue diagnostics.