Wiper Switch Inspection


  1. INSPECT WIPER AND WASHER SWITCH ASSEMBLY

Wiper Switch -- Inspection



1. INSPECT WIPER AND WASHER SWITCH ASSEMBLY


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Wiper And Washer.Wiper Switch.Wiper Switch Inspection

  1. Measure the resistance of the switch.

    Standard resistance:
    Windshield wiper switch
    Tester Connection
    		Switch Condition
    		Specified Condition
    B-2 (+1) - B-3 (+B)
    		MIST
    		Below 1 Ω
    B-2 (+1) - B-4 (+S)
    		OFF
    		Below 1 Ω
    B-2 (+1) - B-4 (+S)
    		INT
    		Below 1 Ω
    B-2 (+1) - B-3 (+B)
    		LO
    		Below 1 Ω
    B-1 (+2) - B-3 (+B)
    		HI
    		Below 1 Ω
    Windshield washer switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A-1 (WF) - A-2 (EW)
    		OFF
    		10 kΩ or higher
    A-1 (WF) - A-2 (EW)
    		ON
    		Below 1 Ω
    Rear wiper and washer switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A-2 (EW) - B-10 (WR)
    		WASH
    (Rear wiper switch ON position side)
    		Below 1 Ω
    A-2 (EW) - B-10 (WR)
    		OFF
    		10 kΩ or higher
    A-4 (+1R) - B-10 (WR)
    		OFF
    		10 kΩ or higher
    A-2 (EW) - A-4 (+1R)
    		OFF
    		10 kΩ or higher
    A-2 (EW) - A-4 (+1R)
    		ON
    		Below 1 Ω
    A-2 (EW) - B-10 (WR)
    		WASH
    (Rear wiper switch ON position side)
    		Below 1 Ω
    A-4 (+1R) - B-10 (WR)
    		WASH
    (Rear wiper switch ON position side)
    		Below 1 Ω
    A-2 (EW) - A-4 (+1R)
    		WASH
    (Rear wiper switch ON position side)
    		Below 1 Ω
    If the result is not as specified, replace the switch assembly.


  1. Check the intermittent operation.

    1. Connect the voltmeter's positive (+) lead to terminal B-2 (+1) and the negative (-) lead to terminal A-2 (EW).

    2. Connect the battery's positive (+) lead to terminal B-3 (+B) and the negative (-) lead to terminals A-2 (EW) and B-4 (+S).

    3. Turn the wiper switch to the INT position.

    4. Connect the battery's positive (+) lead to terminal B-4 (+S) for 5 seconds.



    5. Connect the battery's negative (-) lead to terminal B-4 (+S). Operate the intermittent wiper relay and check the voltage between terminals B-2 (+1) and A-2 (EW).

      OK:
      Refer to illustration below.


      Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Wiper And Washer.Wiper Switch.Wiper Switch Inspection

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


  1. Check the washer operation.

    1. Turn the wiper switch OFF.

    2. Connect the battery's positive (+) lead to terminal B-3 (+B) and the negative (-) lead to terminals B-4 (+S) and A-2 (EW).

    3. Connect the voltmeter's positive (+) lead to terminal B-2 (+1) and the negative (-) lead to terminal A-2 (EW).



    4. Turn the washer switch ON and OFF, and check the voltage between terminals B-2 (+1) and A-2 (EW).

      OK:
      Refer to illustration below.


      Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Wiper And Washer.Wiper Switch.Wiper Switch Inspection

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