WIPER SWITCH INSPECTION

PROCEDURE

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

    1. Check the front wiper switch.

      1. U123724E01

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        A-1 (+S) - A-3 (+1)

        Off

        Below 1 Ω

        A-2 (+B) - A-3 (+1)

        MIST

        LO

        A-2 (+B) - A-4 (+2)

        HI

        A-9 (AUTO) - A-10 (E)

        AUTO

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

        Table 1. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)

    2. Check the adjusting ring.

      1. U123725E01

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        A-7 (VR1) - A-8 (VR2)

        Adjusting ring moved from (+) to (-)

        Below 10 to 2700 Ω
        Tip:

        The rain sensor sensitivity can be adjusted by the windshield wiper switch adjusting ring.

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

        Table 2. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)

    3. Check the front washer switch.

      1. U123726E01

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        B-2 (EW) - B-3 (WF)

        On

        Below 1 Ω

        Off

        10 kΩ or higher

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

        Table 3. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)

    4. Check the rear wiper switch.

      1. U123728E02

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        B-2 (EW) - B-6 (C1R)

        LO

        Below 1 Ω

        B-2 (EW) - B-7 (+1R)

        HI

        B-2 (EW) - B-6 (C1R)

        Off

        10 kΩ or higher

        B-2 (EW) - B-7 (+1R)

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

        Table 4. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)

    5. Check the rear washer switch.

      1. U123727E01

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        B-2 (EW) - A-5 (WR)

        On

        Below 1 Ω

        Off

        10 kΩ or higher

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

        Table 5. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)

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

    1. Check the front wiper switch.

      1. U123729E02

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        A-1 (+S) - A-3 (+1)

        INT

        Below 1 Ω

        Off

        A-2 (+B) - A-3 (+1)

        MIST

        LO

        A-2 (+B) - A-4 (+2)

        HI

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

        Table 6. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)

    2. Check the front washer switch.

      1. U123730E01

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        B-2 (EW) - B-3 (WF)

        On

        Below 1 Ω

        Off

        10 kΩ or higher

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

        Table 7. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)
    3. U123731E01

      Check the intermittent operation.

      Table 8. Text in Illustration

      *1

      Component without harness connected

      (Windshield Wiper Switch Assembly)

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

      2. Connect the positive (+) lead of the battery to terminal A-2 (+B) and the negative (-) lead to terminals B-2 (EW) and A-1 (+S).

      3. Turn the wiper switch to the INT position.

      4. Connect the positive (+) lead of the battery to terminal A-1 (+S) for 5 seconds.

      5. Connect the negative (-) lead of the battery to terminal A-1 (+S). Operate the intermittent wiper relay and check the voltage between terminals A-3 (+1) and B-2 (EW).

        OK

        Voltage changes as shown in the illustration below.

        E056399E55

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

    4. U123732E01

      Check the front washer operation.

      Table 9. Text in Illustration

      *1

      Component without harness connected

      (Windshield Wiper Switch Assembly)

      1. Turn the wiper switch off.

      2. Connect the positive (+) lead of the battery to terminal A-2 (+B) and the negative (-) lead to terminals A-1 (+S) and B-2 (EW).

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

      4. Turn the washer switch on and off, and check the voltage between terminals A-3 (+1) and B-2 (EW).

        OK

        Voltage changes as shown in the illustration below.

        E125344E41

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

    5. Check the rear wiper switch.

      1. U123734E01

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        B-2 (EW) - B-6 (C1R)

        LO

        Below 1 Ω

        B-2 (EW) - B-7 (+1R)

        HI

        B-2 (EW) - B-6 (C1R)

        Off

        10 kΩ or higher

        B-2 (EW) - B-7 (+1R)

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

        Table 10. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)
    6. U123733E01

      Check the rear washer switch.

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

        Standard Resistance

        Tester Connection

        Switch Condition

        Specified Condition

        B-2 (EW) - A-5 (WR)

        On

        Below 1 Ω

        Off

        10 kΩ or higher

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

        Table 11. Text in Illustration

        *1

        Component without harness connected

        (Windshield Wiper Switch Assembly)