WIPER / WASHER: WIPER AND WASHER SYSTEM (for Gasoline Model): Wiper and Washer Switch Circuit; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000001COJW
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 01/2019]
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for Gasoline Model): Wiper and Washer Switch Circuit; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

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 Fr WASH position signal	OFF or ON	OFF: Washer switch not in Fr WASH position ON: Washer switch in Fr WASH position	-
Rear Wiper Lo Switch	Rear wiper switch Rr ON position signal	OFF or ON	OFF: Rear wiper switch not in Rr ON position ON: Rear wiper switch in Rr ON position	-
Rear Wiper Hi Switch	Rear wiper switch Rr INT position signal	OFF or ON	OFF: Rear wiper switch not in Rr INT position ON: Rear wiper switch in Rr INT position	-
Rear Washer Switch	Washer switch Rr WASH position signal	OFF or ON	OFF: Washer switch not in Rr WASH position ON: Washer switch in Rr WASH position	-
Intermittent Time Volume	Intermittent time adjustment switch condition	Shortest, Shorter, Longer or Longest	Shortest: P4 Shorter: P3 Longer: P2 Longest: P1	*

*: Refer to Inspection for each position of the switch.
Click here

Chassis > Steering Angle Sensor > Data List

Tester Display
Wiper OFF Switch
Wiper Auto/Int Switch
Wiper Lo Switch
Wiper Hi Switch
Wiper Mist Switch
Washer Switch
Rear Wiper Lo Switch
Rear Wiper Hi Switch
Rear Washer Switch
Intermittent Time Volume

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 WHEEL SWITCH HOUSING

4.	CHECK HARNESS AND CONNECTOR (STEERING SENSOR - WINDSHIELD WIPER RELAY)

(a) Disconnect the A56 windshield wiper relay connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I46-2 (2S) - A56-3 (2S)	Always	Below 1 Ω
I46-2 (2S) or A56-3 (2S) - Body ground	Always	10 kΩ or higher

REPLACE WINDSHIELD WIPER RELAY

REPAIR OR REPLACE HARNESS OR CONNECTOR