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Wiper Switch (HI Speed) Circuit: Procedure

  1. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ECU - FRONT CONTROLLER) 
    1. Disconnect the combination switch ECU connector.
      Fig 1: Identifying Combination Switch ECU Connector Terminals
      GTY187209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 1G connector from the front controller.
      Fig 2: Identifying Front Controller Connector Terminals
      GTY177937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Condition
      D13-3 - 1G-4 Always Below 1 Ω
      1G-4 - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ECU - BODY GROUND) 
    1. Disconnect the combination switch ECU connector.
      Fig 3: Identifying Combination Switch ECU Connector Terminals
      GTY187209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Condition
      D13-5 - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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