Flow of Diagnosis

1. The wiper/washer system is a Generic Electronic Module (GEM) controlled system.

NOTE: The GEM must be reconfigured upon replacement. Refer to the NGS Tester help screen on the configuration card to program the tire size and axle ratio.

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

VISUAL INSPECTION CHART

Mechanical
- Hoses to windshield washer pump
- Wiper/washer switch
- Wiper linkage
- Windshield wiper motor

Electrical
- Fuse(s)
- Damaged wiring harness
- Loose or corroded connector(s)
- Circuitry open/shorted

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, refer to the New Generation STAR Tester manual.
6. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
- CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
- NO RESP/NOT EQUIP for GEM, go to Pinpoint Test A. A: No Communication With the Module - Generic Electronic
- SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for the GEM.

NOTE: For vehicles built prior to February 5, 1998, the following criteria must be met when performing the GEM On-Demand Self-Test: headlamps and parklamps must be off and the power windows must be completely up. Failure to meet this criteria will result in DTCs B1577 and B2357 being set. For vehicles built after February 5, 1998, the following criteria must be met when performing the GEM On-Demand Self-Test: headlamps and parklamps must be on. Failure to meet this criteria will result in DTC B1575 being set.

7. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. GEM Diagnostic Trouble Code Index
8. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Diagnosis by Symptom