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Home >> Lexus >> 2013 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System And Washer System (Diagnostics & Circuit Tests) >> Wiper And Washer System >> Circuit Tests >> Front Wiper Motor Circuit >> Procedure

Front Wiper Motor Circuit: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (FRONT WIPER MOTOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream on.
    3. Select the items below using ACTIVE TEST and then check that the front wiper motor operates.
      BODY NO. 3 (MAIN BODY ECU LH):

      Item Test Details Diagnostic Note
      Wiper Motor Hi Front wiper motor HI operation ON / OFF -
      Wiper Motor Lo Front wiper motor LO operation ON / OFF -

      OK

      Front wiper motor operates.

    NG → See step   2 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  2. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY 
    1. Remove the windshield wiper motor assembly. Refer to REMOVAL [08/2012 - ] .
      GTY149869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the LO operation.
      1. Connect the positive (+) battery lead to terminal 1 (+1) of the connector, and the negative (-) battery lead to terminal 5 (E), and check that the motor operates at low speed.
    3. Check the HI operation.
      1. Connect the positive (+) battery lead to terminal 4 (+2) of the connector, and the negative (-) battery lead to terminal 3 (+S), and check that the motor operates at high speed.

    NG → REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR - MAIN BODY ECU LH (COWL SIDE J/B LH)) 
    1. Disconnect the A19 windshield wiper motor assembly connector.
      GTY150129Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A30 main body ECU LH (cowl side J/B LH) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      LK-9 (WIG) - A19-2 (B) Always Below 1 Ω
      A30-1 (S/S) - A19-1 (+1) Always Below 1 Ω
      A30-2 (+2) - A19-4 (+2) Always Below 1 Ω
      A30-3 (S/M) - A19-3 (+S) Always Below 1 Ω
      A19-3 (+S) - Body ground Always 10 kΩ or higher
      A19-2 (B) - Body ground Always 10 kΩ or higher
      A19-4 (+2) - Body ground Always 10 kΩ or higher
      A19-5 (E) - Body ground Always Below 1 Ω
      A19-1 (+1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

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