WIPER SWITCH > INSPECTION

for Preparation Click here



1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (w/o Rain Sensor)


  1. LHD, RHD Light Control Switch LH Side Type:



      E171721E26

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Front Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-1 (+S) - H27-3 (+1)
      		OFF
      		Below 1 Ω
      INT
      H27-2 (+B) - H27-3 (+1)
      		MIST
      LO
      H27-2 (+B) - H27-4 (+2)
      		HI
      Front Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-2 (EW) - H28-3 (WF)
      		ON
      		Below 1 Ω
      OFF
      		10 kΩ or higher
      Rear Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-6 (C1R) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-7 (+1R) - H28-2 (EW)
      H28-6 (C1R) - H28-2 (EW)
      		INT
      		Below 1 Ω
      H28-7 (+1R) - H28-2 (EW)
      		HI
      		Below 1 Ω
      Rear Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-5 (WR) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-7 (+1R) - H28-2 (EW)
      H27-5 (WR) - H28-2 (EW)
      		WASH
      		Below 1 Ω
      H27-5 (WR) - H28-2 (EW)
      		ON + WASH
      		Below 1 Ω
      H28-7 (+1R) - H28-2 (EW)

      If the result is not as specified, replace the windshield wiper switch assembly.
      Text in Illustration 
      *a
      		Component without harness connected
      (Windshield Wiper Switch Assembly)

    2. Check the intermittent operation.

      1. Connect a voltmeter positive (+) lead to terminal H27-3 (+1) and a negative (-) lead to terminal H28-2 (EW).
      2. Connect an auxiliary battery positive (+) lead to terminal H27-2 (+B) and a negative (-) lead to terminal H28-2 (EW) and H27-1 (+S).
      3. Turn the wiper switch to the INT position.
      4. Connect an auxiliary battery positive (+) lead to terminal H27-1 (+S) for 5 seconds.

      5. Connect an auxiliary battery negative (-) lead to terminal H27-1 (+S). Operate the intermittent wiper relay and check the voltage between terminals H27-3 (+1) and H28-2 (EW).

        OK:
        Voltage changes as shown in the illustration.



        E056399E62

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

        Text in Illustration 
        *a
        		Voltage between terminals H27-3 (+1) and H28-2 (EW)
        		*b
        		FAST: Connect auxiliary battery negative lead to terminal H27-1 (+S)
        *c
        		SLOW: Connect auxiliary battery negative lead to terminal H27-1 (+S)
        		-
        		-



  1. RHD Light Control Switch RH Side Type:



      E169424E23

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Front Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-4 (+S) - H27-2 (+1)
      		OFF
      		Below 1 Ω
      INT
      H27-3 (+B) - H27-2 (+1)
      		MIST
      LO
      H27-3 (+B) - H27-1 (+2)
      		HI
      Front Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-2 (EW) - H28-1 (WF)
      		ON
      		Below 1 Ω
      OFF
      		10 kΩ or higher
      Rear Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-5 (C1R) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-4 (+1R) - H28-2 (EW)
      H28-5 (C1R) - H28-2 (EW)
      		INT
      		Below 1 Ω
      H28-4 (+1R) - H28-2 (EW)
      		HI
      		Below 1 Ω
      Rear Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-10 (WR) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-4 (+1R) - H28-2 (EW)
      H27-10 (WR) - H28-2 (EW)
      		WASH
      		Below 1 Ω
      H27-10 (WR) - H28-2 (EW)
      		ON + WASH
      		Below 1 Ω
      H28-4 (+1R) - H28-2 (EW)

      If the result is not as specified, replace the windshield wiper switch assembly.
      Text in Illustration 
      *a
      		Component without harness connected
      (Windshield Wiper Switch Assembly)

    2. Check the intermittent operation.

      1. Connect a voltmeter positive (+) lead to terminal H27-2 (+1) and a negative (-) lead to terminal H28-2 (EW).
      2. Connect an auxiliary battery positive (+) lead to terminal H27-3 (+B) and a negative (-) lead to terminal H28-2 (EW) and H27-4 (+S).
      3. Turn the wiper switch to the INT position.
      4. Connect an auxiliary battery positive (+) lead to terminal H27-4 (+S) for 5 seconds.

      5. Connect an auxiliary battery negative (-) lead to terminal H27-4 (+S). Operate the intermittent wiper relay and check the voltage between terminals H27-2 (+1) and H28-2 (EW).

        OK:
        Voltage changes as shown in the illustration.



        E056399E62

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

        Text in Illustration 
        *a
        		Voltage between terminals H27-2 (+1) and H28-2 (EW)
        		*b
        		FAST: Connect auxiliary battery negative lead to terminal H27-4 (+S)
        *c
        		SLOW: Connect auxiliary battery negative lead to terminal H27-4 (+S)
        		-
        		-



2. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY (w/ Rain Sensor)


  1. LHD, RHD Light Control Switch LH Side Type:



      E171721E27

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Front Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-1 (+S) - H27-3 (+1)
      		OFF
      		Below 1 Ω
      AUTO
      H27-2 (+B) - H27-3 (+1)
      		MIST
      LO
      H27-2 (+B) - H27-4 (+2)
      		HI
      H27-9 (AUTO) - H27-10 (E)
      		AUTO
      		Below 1 Ω
      Front Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-2 (EW) - H28-3 (WF)
      		ON
      		Below 1 Ω
      OFF
      		10 kΩ or higher
      Rear Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-6 (C1R) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-7 (+1R) - H28-2 (EW)
      H28-6 (C1R) - H28-2 (EW)
      		INT
      		Below 1 Ω
      H28-7 (+1R) - H28-2 (EW)
      		HI
      		Below 1 Ω
      Rear Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-5 (WR) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-7 (+1R) - H28-2 (EW)
      H27-5 (WR) - H28-2 (EW)
      		WASH
      		Below 1 Ω
      H27-5 (WR) - H28-2 (EW)
      		ON + WASH
      		Below 1 Ω
      H28-7 (+1R) - H28-2 (EW)

      If the result is not as specified, replace the windshield wiper switch assembly.
      Text in Illustration 
      *a
      		Component without harness connected
      (Windshield Wiper Switch Assembly)



  1. RHD Light Control Switch RH Side Type:



      E169424E24

    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance:
      Front Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-4 (+S) - H27-2 (+1)
      		OFF
      		Below 1 Ω
      AUTO
      H27-3 (+B) - H27-2 (+1)
      		MIST
      LO
      H27-3 (+B) - H27-1 (+2)
      		HI
      H27-6 (AUTO) - H27-5 (E)
      		AUTO
      		Below 1 Ω
      Front Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-2 (EW) - H28-1 (WF)
      		ON
      		Below 1 Ω
      OFF
      		10 kΩ or higher
      Rear Wiper Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H28-5 (C1R) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-4 (+1R) - H28-2 (EW)
      H28-5 (C1R) - H28-2 (EW)
      		INT
      		Below 1 Ω
      H28-4 (+1R) - H28-2 (EW)
      		HI
      		Below 1 Ω
      Rear Washer Switch 
      Tester Connection
      		Switch Condition
      		Specified Condition
      H27-10 (WR) - H28-2 (EW)
      		OFF
      		10 kΩ or higher
      H28-4 (+1R) - H28-2 (EW)
      H27-10 (WR) - H28-2 (EW)
      		WASH
      		Below 1 Ω
      H27-10 (WR) - H28-2 (EW)
      		ON + WASH
      		Below 1 Ω
      H28-4 (+1R) - H28-2 (EW)

      If the result is not as specified, replace the windshield wiper switch assembly.
      Text in Illustration 
      *a
      		Component without harness connected
      (Windshield Wiper Switch Assembly)