Initial Inspection and Diagnostic Overview

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







VISUAL INSPECTION CHART

3. If the concern remains after the inspection, connect the New Generation STAR (NGS) Tester to the data link connector located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If the NGS 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.

4. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR (NGS) Tester manual.
5. Carry out the DATA LINK DIAGNOSTICS. If the NGS responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus).
^ NO RESP/NOT EQUIP for DDM, go to Pinpoint Test A. Test A: No Communication With the Driver Door Module
^ NO RESP/NOT EQUIP for REM, go to Pinpoint Test B. Test B: No Communication With the Rear Electronic Module
^ NO RESP/NOT EQUIP for FEM, go to Pinpoint Test R. Test R: No Communication With the Front Electronic Module
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the DDM, FEM or REM.

6. If the DTCs retrieved are related to the concern, go to
DDM DTC Index, DDM Diagnostic Trouble Code (DTC) Index
REM DTC Index, REM Diagnostic Trouble Code (DTC) Index
FEM DTC Index, FEM Diagnostic Trouble Code (DTC) Index
SSP Relay Index to continue diagnostics. Component Tests and General Diagnostics
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures