Flow Chart No. 4: Windshield Wipers Inoperative at Low Setting

Flow Chart No. 4 - Symptom- Windshield wipers inoperative at low selling.

Step 1
Preliminary test.
1. Check fuses for continuity; check connections for clean, tight fit; check for loose or damaged wires.




2. Do components and wiring check OK?

Step 2
On-demand self test.







1. Connect NGS Tester 49 T088 0A0 to DLC. Retrieve continuous DTCs. Perform on-demand self test.




2. Are any DTCs present?

Step 3
Check W circuit.
1. Disconnect battery ground cable.
2. Check for open in W wire between hi/lo relay and wiper motor low speed connection.




3. Is circuit OK?

Step 4
Functional test.

NOTE
^ Some abnormal drive symptoms may occur after the battery has been disconnected and reconnected. The vehicle may have to be driven 16 km (10 miles) or more to allow the PCM to relearn the adaptive strategy.




1. Reconnect battery.
2. Run wiper control functional test.
3. Energize run/park relay, then energize hi/lo relay.




4. Does windshield wiper motor change from low speed to high speed and then back to low speed?