Test G-2: Any Windshield Wiper Switch Position Malfunction
- Check input signals from windshield wiper switch. See INPUT SIGNAL CHECK FUNCTION under SELF-DIAGNOSTIC SYSTEM. If input signal test shows a fault, check windshield wiper input circuit. See TEST O-18: WINDSHIELD & REAR WIPER SWITCH CIRCUIT CHECKS . If input signal test is okay, go to next step.
- Disconnect wiper motor 5-pin connector. Using fused jumper wires, apply battery voltage to wiper motor connector terminal No. 3 and ground wiper motor connector terminal No. 5. See Figure . Wiper should operate at low speed. Go to next step.
- Apply battery voltage to wiper motor connector terminal No. 4 (Blue/Yellow wire) and ground wiper motor connector terminal No. 5 (Black wire). Wiper should operate at high speed. If wiper operates as specified, go to next step. If wiper does not operate as specified, replace wiper motor.
- Check wiper motor connector and front-ECU connector A-09X for loose, damaged or corroded terminals. If problem exists, repair connector(s) as necessary and retest wiper operation. If problem does not exist, go to next step.
- Check for open or short in Yellow/Black wire between wiper motor connector terminal No. 2 and front-ECU connector A-09X terminal No. 7. See Figure . Check for open or short in Blue/Orange wire between wiper motor connector terminal No. 3 and front-ECU connector A-09X terminal No. 11. Check for open or short in Blue/Yellow wire between wiper motor connector terminal No. 4 and front-ECU connector A-09X terminal No. 12. If problem exists, repair appropriate wire and retest wiper operation. If problem does not exist, replace front-ECU and retest wiper operation.