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Wiper Switch: Inspection

  1. WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. Continuity Check
      1. Measure the resistance according to the value(s) in the table below.
        Fig 1: Identifying Windshield Wiper Switch Connector Terminal
        G05204376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance 

        Front Wiper Switch 

        FRONT WIPER SWITCH

        Tester connection Switch operation Specified condition
        7 (+1) - 17 (+B) MIST Below 1 Ω
        7 (+1) - 16 (+S) OFF Below 1 Ω
        7 (+1) - 16 (+S) INT Below 1 Ω
        7 (+1) - 17 (+B) LO Below 1 Ω
        8 (+2) - 17 (+B) HI Below 1 Ω

        Front Washer Switch 

        FRONT WASHER SWITCH

        Tester connection Switch operation Specified condition
        2 (EW) - 11 (WF) OFF 10 kΩ or higher
        2 (EW) - 11 (WF) ON Below 1 Ω

        Rear Wiper and Washer Switch 

        REAR WIPER AND WASHER SWITCH

        Tester connection Switch operation Specified condition
        2 (EW) - 12 (WR) WASH (Rear wiper switch OFF side) Below 1 Ω
        2 (EW) - 10 (+1R)
        2 (EW) - 12 (WR)
        2 (EW) - 13 (C1R)        		 OFF 10 kΩ or higher
        2 (EW) - 13 (C1R) INT Below 1 Ω
        2 (EW) - 10 (+1R) ON Below 1 Ω
        2 (EW) - 10 (+1R)
        2 (EW) - 12 (WR)        		 WASH (Rear wiper switch OFF side) Below 1 Ω
    2. Intermittent Operation Check
      1. Connect the voltmeter (+) terminal to terminal 7 (+1) of the connector, the voltmeter (-) terminals to terminal 2 (EW) of the connector.
      2. Connect the battery (+) to terminal 17 (+B) of the connector, the battery (-) to terminal 2 (EW) and 16 (+S) of the connector.
      3. Turn the wiper switch to INT.
      4. Connect the battery (+) to terminal 16 (+S) of the connector for 5 seconds.
      5. Connect the battery (-) to terminal 16 (+S) of the connector. Operate the intermittent wiper relay and check voltage between terminal 7 (+1) and terminal 2 (EW).
        Fig 2: Checking Intermittent Operation
        G05243210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Operation Check (Front Wiper)
      1. Turn the wiper switch OFF.
      2. Connect the positive (+) lead from the battery to terminal 17 (+B) and the negative (-) lead to terminals 2 (EW) and 16 (+S).
      3. Connect the positive (+) lead from the voltmeter to terminal 7 (+1) and the negative (-) lead to terminal 2 (EW). Turn the washer switch ON and OFF and check voltage between terminal 7 (+1) and terminal 2 (EW).
        Fig 3: Checking Front Wiper Operation
        G05243211Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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