WIPER AND WASHER SYSTEM Front Wiper Motor Circuit

DESCRIPTION

The windshield wiper ECU controls the wiper motor.

WIRING DIAGRAM

A01EOCUE05

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FRONT WIPER MOTOR)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check the front wiper motor.

      Note

      When a Body No. 5 (windshield wiper ECU) related front wiper switch is on, Active Test items related to the front wiper switch are prohibited (double operation prohibition). Check that the front wiper switches are off before performing Active Test.

      Body No. 5
      Item Test Details Control Range Diagnostic Note
      Wiper Mot (HI) Wiper motor HI operation ON / OFF -
      Wiper Mot (LO) Wiper motor LO operation ON / OFF -
      OK
      Front wiper motor operates.

    NG

    INSPECT FRONT WIPER MOTOR Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT FRONT WIPER MOTOR


    1. A01ENR1E01

      Remove the front wiper motor Click here.

    2. Apply battery voltage to the front wiper motor connector and check the speed of the front wiper motor.

      OK
      for LHD
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 1 (+1)

      Battery negative (-) → Terminal 5 (E)

      		 Motor operates at low speed

      Battery positive (+) → Terminal 4 (+2)

      Battery negative (-) → Terminal 5 (E)

      		 Motor operates at high speed
      for RHD
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 5 (+1)

      Battery negative (-) → Terminal 4 (E)

      		 Motor operates at low speed

      Battery positive (+) → Terminal 3 (+2)

      Battery negative (-) → Terminal 4 (E)

      		 Motor operates at high speed

    NG

    REPLACE FRONT WIPER MOTOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR - WINDSHIELD WIPER ECU AND BODY GROUND)


    1. A01EQ4NE03

      Disconnect the A22 motor connector.

    2. Disconnect the E89 ECU connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A22-2 (B) - E89-8 (WIG) Always Below 1 Ω
      A22-1 (+1) - E89-1 (+1)
      A22-4 (+2) - E89-2 (+2)
      A22-3 (+S) - E89-7 (+SM)
      A22-5 (E) - Body ground
      A22-3 (+S) - Body ground Always 10 kΩ or higher
      A22-2 (B) - Body ground
      A22-4 (+2) - Body ground
      A22-1 (+1) - Body ground
      for RHD
      Tester Connection Condition Specified Condition
      A22-2 (B) - E89-8 (WIG) Always Below 1 Ω
      A22-5 (+1) - E89-1 (+1)
      A22-3 (+2) - E89-2 (+2)
      A22-1 (+S) - E89-7 (+SM)
      A22-4 (E) - Body ground
      A22-1 (+S) - Body ground Always 10 kΩ or higher
      A22-2 (B) - Body ground
      A22-3 (+2) - Body ground
      A22-5 (+1) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE WINDSHIELD WIPER ECU Click here