Only Front Wiper Auto Does Not Operate

FRONT WIPER AND WASHER SYSTEM


Only Front Wiper Auto Does Not Operate


NOTE:
When the front wiper switch is turned to INT position, front wiper operates once regardless of a rainy condition.
1.CHECK CONDITIONS OF WINDSHIELD (RAIN SENSOR DETECTION AREA)
Check rain sensor detection area of windshield for dirt such as greases.
OK or NG
OK - GO TO 2.
NG - Clean rain sensor detection area of windshield fully.
2.CHECK RAIN SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rain sensor connector.
3. Turn ignition switch ON.
4. Check voltage between rain sensor harness connector and ground.





OK or NG
OK - GO TO 3.
NG - Repair or replace harness.
3.CHECK RAIN SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rain sensor harness connector and ground.





OK or NG
OK - GO TO 4.
NG - Repair or replace harness.
4.CHECK RAIN SENSOR SIGNAL
1. Connect rain sensor connector.
2. Turn ignition switch ON.
3. Check signal between BCM harness connector and ground with oscilloscope.





OK or NG
OK - Replace rain sensor. Refer to Service and Repair.
NG - GO TO 5.
5.CHECK RAIN SENSOR SIGNAL CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and rain sensor harness connector.





3. Check continuity between BCM harness connector and ground.





OK or NG
OK - Replace BCM. Refer to Service and Repair.
NG - Repair or replace harness.