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Wiper Switch: Inspection

WARNING: This page is about a different car, the 2006 Scion tC. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      Front wiper switch 

      Tester Connection Condition 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
    2. Measure the resistance of the switch connector terminals when the washer switch is operated.

      Standard resistance 

      Front washer switch 

      Tester Connection Condition Specified Condition
      2 (EW) -11 (WF) OFF 10 kΩ or higher
      2 (EW) -11 (WF) ON Below 1 Ω
    3. Check the intermittent operation.
      1. Connect the voltmeter positive (+) terminal to terminal 7 (+1) of the connector and the voltmeter negative (-) terminal to terminal 2 (EW).
      2. Connect the battery positive (+) lead to terminal 17 (+B) and the battery negative (-) lead to terminals 2 (EW) and 16 (+S).
      3. Turn the wiper switch to the INT position.
      4. Connect the battery positive (+) lead to terminal 16 (+S) of the connector for 5 seconds.
        Fig 1: Identifying Terminal Connector
        G04224239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Connect the battery negative (-) lead to terminal 16 (+S) of the connector. Operate the intermittent wiper relay.
      6. Check the voltage between terminals 7 (+1) and 2 (EW).
      Fig 2: Voltage Timing Chart
      G04224240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check the front washer operation.
      1. Turn the wiper switch off.
      2. Connect the battery positive (+) lead to terminal 17 (+B) of the connector and the battery negative cable to terminals 16 (+S) and 2 (EW).
      3. Connect the voltmeter positive (+) terminal to terminal 7 (+1) of the connector and the voltmeter negative (-) terminal to terminal 2 (EW).
      4. Turn the washer switch on and off, and check the voltage between terminals 7 (+1) and 2 (EW).
      Fig 3: Voltage Timing Chart
      G04224241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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