Flow of Diagnosis

1. The power windows system is a Generic Electronic Module (GEM) controlled system.

NOTE: The GEM/Central Timer Module (CTM) must be reconfigured upon replacement. Review the New Generation STAR (NGS) Tester help screen on the configuration card to program the tire size and axle ratio.

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

VISUAL INSPECTION CHART

Mechanical
^ Window regulator electric drive
^ Window

Electrical
^ Fuse(s)
^ Wiring harness
^ Loose or corroded connector(s)
^ Circuitry

4. If the concern remains after the inspection, connect the New Generation STAR (NGS) Tester to the Data Link Connector (DLC) 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 properly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
5. If the NGS still does not communicate with the vehicle.
6. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
^ CKT914, CKT915 or CKT7O=ALL ECUS NO RESP/NOT EQUIP.
^ NO RESP/NOT EQUIP for GEM, go to Pinpoint Test E. E: No Communication With the Module - Generic Electronic Module
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform self test diagnostics for the GEM/CTM.
7. If the DTCs retrieved are related to the concern, go to GEM/CTM Diagnostic Trouble Code (DTC) Index E: No Communication With the Module - Generic Electronic Module to continue diagnostics.
8. If no DTCs related to the concern are retrieved, proceed to Symptom Related Diagnostic Procedures