Toyota 4Runner manuals

Toyota 4Runner: Inspection

INSPECTION

PROCEDURE

1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

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

Standard Resistance:

Front Wiper Switch

Tester Connection

Switch Condition

Specified Condition

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

Off

Below 1 Ω

INT

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

MIST

LO

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

HI

Front Washer Switch

Tester Connection

Switch Condition

Specified Condition

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

On

Below 1 Ω

Off

10 kΩ or higher

Rear Wiper Switch

Tester Connection

Switch Condition

Specified Condition

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

Off

10 kΩ or higher

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

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

INT

Below 1 Ω

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

HI

Below 1 Ω

Rear Washer Switch

Tester Connection

Switch Condition

Specified Condition

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

Off

10 kΩ or higher

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

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

WASH

Below 1 Ω

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

On + WASH

Below 1 Ω

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


(b) Check the intermittent operation.

  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 terminal 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.


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

    Text in Illustration

    *1

    Voltage between terminals A-3 (+1) and B-2 (EW)

    *2

    FAST: Negative lead of battery connected to terminal A-1 (+S)

    *3

    SLOW: Negative lead of battery connected to terminal A-1 (+S)

    -

    -

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