Toyota Yaris: Wiper And Washer System / Front Wiper Motor Circuit

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

DESCRIPTION

The windshield wiper relay assembly controls the windshield wiper motor assembly through this circuit.

WIRING DIAGRAM

PROCEDURE

1.

PERFORM ACTIVE TEST USING GTS (FRONT WIPER LO OPERATION / FRONT WIPER HI OPERATION)

(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 Wiper Lo Operation

Function to operate the windshield wiper motor assembly in LO

OFF or ON

-

Front Wiper Hi Operation

Function to operate the windshield wiper motor assembly in HI

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

Front Wiper Lo Operation

Body Electrical > Main Body > Active Test

Tester Display

Front Wiper Hi Operation

OK:

Windshield wiper motor assembly operates normally.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

Click here

NG

REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY

OK

3.

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

(a) Disconnect the A50 and A49 windshield wiper relay assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A50-2 (+1) - A43-1 (+1)

Always

Below 1 Ω

A50-4 (+2) - A43-4 (+2)

Always

Below 1 Ω

A49-6 (+SM) - A43-3 (+S)

Always

Below 1 Ω

A50-2 (+1) or A43-1 (+1) - Body ground

Always

10 kΩ or higher

A50-4 (+2) or A43-4 (+2) - Body ground

Always

10 kΩ or higher

A49-6 (+SM) or A43-3 (+S) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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

*a

Front view of wire harness connector

(to Windshield Wiper Motor Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A43-5 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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