Toyota Yaris: Wiper And Washer System / Washer Motor Circuit

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Exterior / Wiper / Washer / Wiper And Washer System / Washer Motor Circuit

DESCRIPTION

When the windshield washer motor and pump assembly receives signals from the windshield wiper switch assembly, it operates to spray washer fluid from the washer nozzle sub-assemblies.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses of circuits related to this system before performing the following procedure.

HINT:

The wiper and washer system uses the CXPI communication system. First, confirm that there is no malfunction in the CXPI communication system.

PROCEDURE

1.

PERFORM ACTIVE TEST USING GTS (FRONT WASHER RELAY)

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Front Washer Relay

Function to operate the windshield washer motor and pump assembly (Front)

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

Front Washer Relay

OK:

Windshield washer motor and pump assembly operates normally.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY

Click here

NG

REPLACE WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - WINDSHIELD WIPER RELAY ASSEMBLY)

(a) Disconnect the A50 windshield wiper relay assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A50-6 (IGWS) - Body ground

Ignition switch ON

11 to 14 V

*a

Front view of wire harness connector

(to Windshield Wiper Relay Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - BODY GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A50-5 (EWS) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A50-1 (+WR) - A44-1 (B)

Always

Below 1 Ω

A50-7 (-WR) - A44-2 (SW)

Always

Below 1 Ω

A50-1 (+WR) or A44-1 (B) - Body ground

Always

10 kΩ or higher

A50-7 (-WR) or A44-2 (SW) - Body ground

Always

10 kΩ or higher

OK

REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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