Auto Wiper System: Inspection: Notes

WARNING: This page is about a different car, the 2021 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.

Symptoms	Probable defective part
Wiper does not operate. Ref. to WIPER AND WASHER SYSTEMS>Auto Wiper System>INSPECTION>WIPER DOES NOT OPERATE .	Sensor assembly rain failure Combination switch (wiper) failure Body integrated unit failure Wiper motor assembly failure Ambient sensor failure Harness and connector failure Wiper Relay unit failure
INT operation time does not change if the sensitivity volume switch is operated. Ref. to WIPER AND WASHER SYSTEMS>Auto Wiper System>INSPECTION>INT OPERATION TIME DOES NOT CHANGE IF THE SENSITIVITY VOLUME SWITCH IS OPERATED .	Sensor assembly rain failure Combination switch (wiper) failure Body integrated unit failure Harness and connector failure
INT operation intermittent time does not change according to the vehicle speed. Ref. to WIPER AND WASHER SYSTEMS>Auto Wiper System>INSPECTION>INT OPERATION INTERMITTENT TIME DOES NOT CHANGE ACCORDING TO THE VEHICLE SPEED .	VDC CM failure Body integrated unit failure Sensor assembly rain failure
Wipers operate when it is not raining. Ref. to WIPER AND WASHER SYSTEMS>Auto Wiper System>INSPECTION>WIPERS OPERATE WHEN IT IS NOT RAINING .	Sensor assembly rain failure Body integrated unit failure Combination switch (wiper) failure Harness and connector failure Wiper motor assembly failure Wiper relay unit failure
Front wipers do not operate when washer switch is operated. (Washer fluid injection is normal.) Ref. to WIPER AND WASHER SYSTEMS>Auto Wiper System>INSPECTION>FRONT WIPER DOES NOT OPERATE WHEN WASHER SWITCH IS OPERATED (WASHER FLUID INJECTION IS NORMAL) .	Body integrated unit failure Wiper motor assembly failure Harness and connector failure Wiper relay unit failure