Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GTP8
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 -           ]
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for HV Model): Front Wiper Motor Circuit; 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]

Front Wiper Motor Circuit

DESCRIPTION

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

WIRING DIAGRAM

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

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

(a) Remove the windshield wiper motor assembly.

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(b) Inspect the windshield wiper motor assembly.

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NG

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OK

3.

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

(a) Disconnect the A55 and A56 windshield wiper relay connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A55-2 (+1) - A31-1 (+1)

Always

Below 1 Ω

A55-4 (+2) - A31-4 (+2)

Always

Below 1 Ω

A56-6 (+SM) - A31-3 (+S)

Always

Below 1 Ω

A55-2 (+1) or A31-1 (+1) - Body ground

Always

10 kΩ or higher

A55-4 (+2) or A31-4 (+2) - Body ground

Always

10 kΩ or higher

A56-6 (+SM) or A31-3 (+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) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A31-5 (E) - Body ground

Always

Below 1 Ω

OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR