WIPER AND WASHER SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Wiper and Washer System (w/ Auto Wiper System)
Symptom	Suspected Area	Link
Front wipers do not operate at all	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front wipers do not operate in AUTO	Rain sensor	Click here
	Map light assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
When the front wiper switch is in AUTO, the rain sensor sensitivity cannot be adjusted by the windshield wiper switch adjusting switch	CAN communication line	Click here
	Windshield glass (Rain sensor sensing portion) is dirty	-
	Rain sensor	Click here
	Spiral cable with sensor sub-assembly	Click here
	Windshield wiper switch assembly	Click here
	Skid control ECU assembly	Click here
	Harness or connector	-
When the AUTO wiper ON/OFF switch is ON, auto wiper indicator does not illuminate	Lighting system	Click here
	Windshield wiper switch assembly	Click here
	Main body ECU (Multiplex network body ECU)	Click here
	Instrument panel junction block assembly	Click here
	Harness or connector	-
Front wipers do not operate in LO or MIST	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front wipers do not operate in HI	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front washer motor does not operate	Windshield washer motor and pump assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
"Washer Fluid Low" is displayed on the multi-information display	Washer fluid	-
	Level warning switch assembly	Click here
	Combination meter assembly	Click here
	Harness or connector	-
Front wipers do not operate when the front washer switch is on	Windshield wiper switch assembly	Click here
	Harness or connector	-
When the front wiper switch is off, the wiper blades do not stop (park) or stop (park) in the wrong position	Windshield wiper motor assembly (Front wiper arm installation position)	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-

Wiper and Washer System (w/o Auto Wiper System)
Symptom	Suspected Area	Link
Front wipers do not operate at all	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front wipers do not operate in INT	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front wipers do not operate in LO or MIST	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front wipers do not operate in HI	Windshield wiper motor assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
Front washer motor does not operate	Windshield washer motor and pump assembly	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-
"Washer Fluid Low" is displayed on the multi-information display	Washer fluid	-
	Level warning switch assembly	Click here
	Combination meter assembly	Click here
	Harness or connector	-
Front wipers do not operate when the front washer switch is on	Windshield wiper switch assembly	Click here
	Harness or connector	-
When the front wiper switch is off, the wiper blades do not stop (park) or stop (park) in the wrong position	Windshield wiper motor assembly (Front wiper arm installation position)	Click here
	Windshield wiper switch assembly	Click here
	Harness or connector	-

Headlight Cleaner System
Symptom	Suspected Area	Link
Headlight cleaner system does not operate when the front washer switch is operated	Headlight cleaner hose and/or headlight cleaner washer nozzle cover	-
	Headlight cleaner control relay	Click here
	Headlight cleaner motor and pump assembly	Click here
	Headlight washer actuator sub-assembly	Click here
	No. 1 headlight ECU sub-assembly RH	Click here
	Harness or connector	-
Headlight cleaner system does not operate when the front washer switch is first operated	Windshield wiper switch assembly	Click here
	Headlight cleaner control relay	Click here
	Headlight leveling ECU assembly	Click here
	Harness or connector	-