Flow of Diagnosis

1. Verify the customer's concern by operating the power windows/heated back window to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical
- Front door power window regulator damaged.
- Front window run damaged.
- Front door window glass out of window run.
- Front door window glass broken.

Electrical
- Driver door module circuits open/shorted.
- Loose, corroded connectors.
- Damaged window regulator control switch.
- Damaged window regulator electric drive.
- Open fuse in fuse junction panel Fuse 39 (10 A), 28 (10 A), 30 (10 A).
- Open fuse in power distribution box Fuse 9 (40 A). 10 (40 A), 8 (40 A).
- Scratched grid.

3. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
4. If the concern remains after inspection, connect the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent to the data link connector (DLC) located beneath the instrument panel to perform DATA LINK DIAGNOSTICS test. If the NGS responds with NO RESPONSE/NOT EQUIPPED for the driver door module, go to Pinpoint Test A. A: No Communication With Driver Door Module

If the NGS responds with NO RESPONSE/NOT EQUIPPED for the lighting control module, go to Pinpoint Test B. B: No Communication With Lighting Control Module

If the DATA LINK DIAGNOSTICS test is passed for the drivers door module and lighting control module, retrieve continuous DTCs and execute Self Test Diagnostics for the driver door module and lighting control module to retrieve current DTCs.
5. If self test is passed and no DTCs are retrieved, go to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures

6. If DTCs are retrieved, go to the Driver Door Module (DDM) Diagnostic Trouble Code (DTC) Index or Lighting Control Module (LCM) Diagnostic Trouble Code Index to continue diagnostics. Driver Door Module (DDM) Diagnostic Trouble Code (DTC) Index Lighting Control Module (LCM) DTC Index

7. If the driver door module cannot be accessed by the NGS, GO to Pinpoint Test A. A: No Communication With Driver Door Module
If the lighting control module cannot be accessed by the NGS, go to Pinpoint Test B. B: No Communication With Lighting Control Module

Rotunda Service Bay Diagnostic System (SBDS (R)) may also be used to diagnose this system.