Flow of Diagnosis

1. Verify the customer's concern by operating the windshield wiper and washer system to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART - WINDSHIELD WIPER AND WASHER SYSTEMS

Mechanical
^ Windshield wiper blade missing or damaged.
^ Binding windshield wiper pivot arm.
^ Binding windshield wiper mounting arm and pivot shaft.
^ Empty windshield washer reservoir.
^ Kinked or broken windshield washer hoses.

Electrical
^ Open fuse junction panel Fuses:
- 8 (5 A)
- 12 (5 A)
- 20 (5 A)
- 23 (5 A)
^ Damaged windshield wiper motor.
^ Damaged windshield washer pump.
^ Open connectors.
^ corroded connectors.
^ Inoperative multi-function switch.
^ Open thermal breaker internal to the wiper motor.

3. Visually inspect the components of the rear windshield wiper system.

VISUAL INSPECTION CHART - LIFTGATE WIPER AND WASHER SYSTEMS

Mechanical
^ Binding windshield wiper pivot arm.
^ Damaged/stripped windshield wiper motor shaft.
^ Damaged/stripped windshield wiper pivot arm.
^ corrosion.

Electrical
^ Open fuse 19 (15 A) in fuse junction panel.
^ Damaged rear windshield wiper/washer switch.
^ Damaged rear windshield wiper motor.
^ Loose or corroded electrical connectors.

4. If inspection reveals an obvious concern that is readily repaired, correct the concern before continuing with Inspection and Verification.
5. If a concern remains after the inspection, connect Rotunda New Generation STAR (NGS) Tester 418-F048 (007-00500) or equivalent to the Data Link Connector (DLC) located beneath the instrument panel to perform the Data Link Diagnostics Test. If the NGS responds with NO RESPONSE/NOT EQUIPPED for the Generic Electronic Module (GEM), GO to Pinpoint Test J. J: No Communication With the Module-GEM Module If the Data Link Diagnostic test is passed for the Generic Electronic Module (GEM), retrieve continuous DTCs and execute self test diagnostics for the GEM.
6. If self test is passed and no DTCs are retrieved, Symptom Related Diagnostic Procedures Symptom Chart to continue diagnostics.
7. It DTCs are retrieved, go to GEM Diagnostic Trouble Code (DTC) Index Diagnostic Trouble Code Tests and Associated Proceduresto continue diagnostics.