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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Front wiper and washer system
Symptom	Suspected Area	See page
Wiper and washer systems do not operate at all	ECU power source circuit	Click here
	Wiper and washer switch circuit	Click here
	Front light ECU	-
Wiper system does not operate at all	ECU power source circuit	Click here
	Wiper and washer switch circuit	Click here
	Front wiper motor circuit	Click here
	Front light ECU	-
Wiper system does not operate (LO, INT)	Wiper and washer switch circuit	Click here
	Front wiper motor circuit	Click here
	Front light ECU	-
Wiper system does not operate (HI)	Wiper switch (Hi-speed) circuit	Click here
	Front wiper motor circuit	Click here
	Front light ECU	-
Wiper system does not stop	Wiper switch (Hi-speed) circuit	Click here
	Front wiper motor circuit	Click here
	Front light ECU	-
Washer system does not operate	Wiper and washer switch circuit	Click here
	Washer motor circuit	Click here
	Front light ECU	-

Auto wiper system
Symptom	Suspected Area	See page
Auto wiper system does not operate (manual operation)	Rain sensor circuit	Click here
	Map light assembly (overhead junction block)	Click here
	Rain sensor	Click here
	Front light ECU	-

Headlight cleaner system
Symptom	Suspected Area	See page
Headlight cleaner system does not operate at all	Headlight cleaner switch circuit	Click here
	Headlight cleaner motor and relay circuit	Click here
	Headlight cleaner control relay	Click here
	Front light ECU	-
	Main body ECU (driver side junction block assembly)	-

Others
Symptom	Suspected Area	See page
Washer fluid level warning system does not operate	Washer level warning switch circuit	Click here
Washer fluid level warning system does not operate	Front light ECU	-