Flow of Diagnosis

1. Verify the customer's concern by operating the illuminated entry to duplicate the condition.
2. Inspect to determine if one of the electrical concerns apply:

VISUAL INSPECTION CHART

Electrical
- Damaged lamps.
- Damaged switches.
- Stuck switches.
- Open fuses.
- Fuse junction panel fuse:
+ 22 (5 A).
+ 27 (10 A).
+ 12 (5 A).
- Power distribution box:
+ Fuse 2 (40 A).
- Open bulbs.
- Loose connectors.
- corroded connectors.

3. If the inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
4. If a concern remains after the 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 the Data Link Diagnostic Test. If the NGS responds with NO RESPONSE/NOT EQUIPPED for the GEM, go to Pinpoint Test BA. BA No Communication With Generic Electronic Module
If the Data Link Diagnostic test is passed for the GEM, retrieve continuous DTCs and execute self test diagnostics for the GEM.
5. If self test is passed and no DTCs are retrieved, go to the Symptom Chart. Symptom Related Diagnostic Procedures
6. If DTCs are retrieved, go to the GEM Diagnostic Trouble Code (DTC) Index. Generic Electronic Module Diagnostic Trouble Code Index
7. If the GEM cannot be accessed by the NGS tester, go to Pinpoint Test BA. BA No Communication With Generic Electronic Module

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