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Home >> Scion >> 2012 >> iQ L4-1.3L (1NR-FE) >> Repair and Diagnosis >> Wiper and Washer Systems >> Wiper Switch >> Testing and Inspection
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Wiper Switch: Testing and Inspection





WIPER / WASHER: WIPER SWITCH: INSPECTION

1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Check the resistance.





Text in Illustration





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

Standard Resistance:

Front Wiper Switch





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

Standard Resistance:

Front Washer Switch






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

Standard Resistance:

Rear Wiper and Washer Switch






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

(b) Check the intermittent operation.

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

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

(3) Turn the wiper switch to the INT position.

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

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

OK:

Refer to the illustration below.





Text in Illustration





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

(c) Check the front washer operation.

(1) Turn the wiper switch OFF.

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

(3) Connect the positive (+) voltmeter terminal to terminal B-3 (+1) and the negative (-) voltmeter terminal to terminal A-2 (EW). Turn the washer switch on and off, and check the voltage between terminals B-3 (+1) and A-2 (EW).

OK:

Refer to the illustration below.





Text in Illustration





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

(d) Check the rear wiper switch.

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

Standard Resistance:

Rear Wiper Switch





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

(e) Check the rear washer switch.

(1) Measure the resistance of the switch.

Standard Resistance:





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