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Wiper Switch: Inspection: Inspection

WARNING: This page is about a different variant/trim than selected.
  1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying Windshield Wiper Switch Assembly Connector Terminals
      GTY234377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Front Washer Switch 

      Rear Wiper Switch 

      Rear Washer Switch 

      FRONT WIPER SWITCH

      Tester Connection Switch Condition Specified Condition
      L48-1 (+S) - L48-3 (+1) OFF Below 1 Ω
      INT
      L48-2 (+B) - L48-3 (+1) MIST
      LO
      L48-2 (+B) - L48-4 (+2) HI
      Tester Connection Switch Condition Specified Condition
      L49-2 (EW) - L49-3 (WF) ON Below 1 Ω
      OFF 10 kΩ or higher
      Tester Connection Switch Condition Specified Condition
      L49-6 (C1R) - L49-2 (EW) OFF 10 kΩ or higher
      L49-7 (+1R) - L49-2 (EW)
      L49-6 (C1R) - L49-2 (EW) INT Below 1 Ω
      L49-7 (+1R) - L49-2 (EW) HI Below 1 Ω
      Tester Connection Switch Condition Specified Condition
      L48-5 (WR) - L49-2 (EW) OFF 10 kΩ or higher
      L49-7 (+1R) - L49-2 (EW)
      L48-5 (WR) - L49-2 (EW) WASH Below 1 Ω
      L48-5 (WR) - L49-2 (EW) ON + WASH Below 1 Ω
      L49-7 (+1R) - L49-2 (EW)

      If the result is not as specified, replace the windshield wiper switch assembly.

      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Windshield Wiper Switch Assembly)
    2. Check the intermittent operation.
      1. Connect a voltmeter positive (+) lead to terminal L48-3 (+1) and a negative (-) lead to terminal L49-2 (EW).
      2. Connect a battery positive (+) lead to terminal L48-2 (+B) and a negative (-) lead to terminal L49-2 (EW) and L48-1 (+S).
      3. Turn the wiper switch to the INT position.
      4. Connect a battery positive (+) lead to terminal L48-1 (+S) for 5 seconds.
      5. Connect a battery negative (-) lead to terminal L48-1 (+S). Operate the intermittent wiper relay and check the voltage between terminals L48-3 (+1) and L49-2 (EW).

        OK

        Voltage changes as shown in the illustration.

        Fig 2: Identifying Voltage Blinking Pattern
        GTY222533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        If the result is not as specified, replace the windshield wiper switch assembly.

        TEXT IN ILLUSTRATION

        *1 Voltage between terminals L48-3 (+1) and L49-2 (EW) *2 FAST: Connect battery negative lead to terminal L48-1 (+S)
        *3 SLOW: Connect battery negative lead to terminal L48-1 (+S) - -
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