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Inspection [08/2013 - ]

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (W/O AUTO WIPER SYSTEM) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Windshield Wiper Switch Assembly (W/O Auto Wiper System) With Connector End View H25, H24
      GTY405567Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Front Washer Switch 

      FRONT WIPER SWITCH

      Tester Connection Condition Specified Condition
      H25-1 (+S) - H25-3 (+1) OFF Below 1 Ω
      INT
      H25-2 (+B) - H25-3 (+1) MIST
      LO
      H25-2 (+B) - H25-4 (+2) HI
      Tester Connection Condition Specified Condition
      H24-4 (EW) - H24-7 (WF) ON Below 1 Ω
      OFF 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Windshield Wiper Switch Assembly)

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

  2. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (W/ AUTO WIPER SYSTEM) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 2: Windshield Wiper Switch Assembly (W/ Auto Wiper System) With Connector End View H25, H24
      GTY398441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      FRONT WIPER SWITCH

      Tester Connection Condition Specified Condition
      H25-3 (+1) - H25-1 (+S) OFF Below 1 Ω
      AUTO
      H25-3 (+1) - H25-2 (+B) MIST
      LO
      H25-2 (+B) - H25-4 (+2) HI
      H25-8 (AUTO) - H25-9 (E) AUTO
      FRONT WASHER SWITCH

      Tester Connection Condition Specified Condition
      H24-4 (EW) - H24-7 (WF) ON Below 1 Ω
      OFF 10 kΩ or higher
      ADJUSTING LEVER*

      Tester Connection Condition Specified Condition
      H25-7 (VR1) - H25-6 (VR2) P1 209 to 231 Ω
      P2 114 to 126 Ω
      P3 58.9 to 65.1 Ω
      P4 Below 1 Ω

      HINT: 

      *: The rain sensor sensitivity can be adjusted by the windshield wiper switch adjusting lever.

      TEXT IN ILLUSTRATION

      *1 Windshield Wiper Switch Assembly (Adjusting Lever Position)
      *a Component without harness connected
      (Windshield Wiper Switch Assembly)

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