Flow of Diagnosis

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

VISUAL INSPECTION CHART

Mechanical

- Window alignment.
- Window mounting (regulator and bracket).
- Window frame interference.

Electrical

- Open power distribution box Fuse 12 (5 A), 5 (5 A), 7 (20 A).
- Fuse junction panel Fuse 23 (5 A).
- Damage to wiring harness.
- Loose or corroded connections.
- Damaged switches.
- Relays in fuse junction panel.

3. Check the wiring harness for obvious signs of shorts, opens, bad connections or damage.
4. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
5. 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 GEM, GO to Pinpoint Test B. B: No Communication With Generic Electronic Module
If the DATA LINK DIAGNOSTICS test is passed for the GEM, retrieve continuous DTCs and execute self test diagnostics for the GEM to retrieve current DTCs.
6. If self test is passed and no DTCs are retrieved, go to the Symptom Chart. Symptom Related Diagnostic Procedures
7. If DTCs are retrieved, go to the Generic Electronic Module (GEM) Diagnostic Trouble Code (DTC) Index to continue diagnostics. GEM Diagnostic Trouble Code Index
8. If the GEM cannot be accessed by the NGS, go to Pinpoint Test B. B: No Communication With Generic Electronic Module

Rotunda Service Bay Diagnostic System (SBDS(R)) 001-00001 may also be used to diagnose this system.