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Home >> Lexus >> 2012 >> HS 250h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System/Washer System (Diagnostics & Circuit Tests) >> Wiper And Washer System >> Circuit Tests >> Front Wiper Motor Circuit >> Procedure

Front Wiper Motor Circuit: Procedure

  1. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY 
    1. Remove the windshield wiper motor assembly. Refer to COMPONENTS .
    2. Check low speed operation.
      Fig 1: Identifying Windshield Wiper Motor Assembly
      GTY279467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Connect a battery positive (+) lead to terminal 1 (+1) and a negative (-) lead to terminal 5 (E), and check that the motor operates at low speed.

      OK

      Motor operates at low speed.

    3. Check high speed operation.

      Connect a battery positive (+) lead to terminal 4 (+2) and a negative (-) lead to terminal 5 (E), and check that the motor operates at high speed.

      OK

      Motor operates at high speed.

      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Windshield Wiper Motor Assembly)

    NG → See step   5 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - BATTERY AND BODY GROUND) 
    1. Disconnect the A30 windshield wiper motor connector.
      Fig 2: Identifying A30 Windshield Wiper Motor Connector
      GTY266733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A30-2 (B) - Body ground Power switch on (IG) 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A30-5 (E) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Windshield Wiper Motor Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR - WINDSHIELD WIPER RELAY) 
    1. Disconnect the F101 windshield wiper relay assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A30-1 (+1) - F101-2 (+1) Always Below 1 Ω
      A30-1 (+1) - Body ground Always 10 kΩ or higher
      A30-4 (+2) - F101-3 (+2) Always Below 1 Ω
      A30-4 (+2) - Body ground Always 10 kΩ or higher
      A30-3 (+S) - F101-10 (+SM) Always Below 1 Ω
      A30-3 (+S) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE  
  5. REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY. Refer to  COMPONENTS 
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