Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Wiper and Washer Switch Circuit

DESCRIPTION

The condition of the windshield wiper switch assembly is detected and sent to the steering sensor in this circuit.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Chassis / Steering Angle Sensor / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Wiper OFF Switch	Front wiper switch OFF position signal	OFF or ON	OFF: Front wiper switch not in OFF position ON: Front wiper switch in OFF position	-
Wiper Auto/Int Switch	Front wiper switch INT position signal	OFF or ON	OFF: Front wiper switch not in INT position ON: Front wiper switch in INT position	-
Wiper Lo Switch	Front wiper switch LO position signal	OFF or ON	OFF: Front wiper switch not in LO position ON: Front wiper switch in LO position	-
Wiper Hi Switch	Front wiper switch HI position signal	OFF or ON	OFF: Front wiper switch not in HI position ON: Front wiper switch in HI position	-
Wiper Mist Switch	Front wiper switch MIST position signal	OFF or ON	OFF: Front wiper switch not in MIST position ON: Front wiper switch in MIST position	-
Washer Switch	Washer switch ON position signal	OFF or ON	OFF: Front washer switch not in ON position ON: Front washer switch in ON position	-
Intermittent Time Volume	Intermittent time adjustment switch condition	Shortest, Shorter, Longer, Longest	Shortest: P4 Shorter: P3 Longer: P2 Longest: P1	*

Chassis > Steering Angle Sensor > Data List

OK:

The Techstream display changes correctly in response to the windshield wiper switch assembly operation.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Remove the windshield wiper switch assembly.

Click here

(b) Inspect the windshield wiper switch assembly.

Click here

REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY

3.	INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here

(b) Inspect the steering wheel switch housing.

Click here

REPLACE STEERING SENSOR

REPLACE STEERING WHEEL SWITCH HOUSING

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Can Communication System(for Hv Model): Parking Assist ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Parking Assist ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Panoramic View Monitor / Circumference Monitoring Camera Control Module" is indicated on the "Communication Bus Check" screen of the Techstream. ...

Toyota Avalon (XX50) 2019-2022 Owners Manual