Lexus NX: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) w/o Auto Wiper System:

Check the front wiper intermittent operation.

(1) Connect a voltmeter positive (+) lead to terminal I125-3 (+1) and a negative (-) lead to terminal I124-4 (EW).

*a Component with harness connected (Windshield Wiper Switch Assembly)

(2) Turn the power switch on (IG).

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

(4) Operate the intermittent wiper and check the voltage between terminals I125-3 (+1) and I124-4 (EW).

OK:

Voltage changes as shown in the illustration.

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

(b) Check the front washer operation.

(1) Connect a voltmeter positive (+) lead to terminal I124-7 (WF) and a negative (-) lead to terminal I124-4 (EW).

*a Component with harness connected (Windshield Wiper Switch Assembly)

(2) Turn the power switch on (IG).

(3) Turn the washer switch on and off, and check the voltage between terminals I124-7 (WF) and I124-4 (EW).

OK:

Voltage changes as shown in the following illustration.

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

(c) Check the rear washer operation.

(1) Connect a voltmeter positive (+) lead to terminal I125-5 (WR) and a negative (-) lead to terminal I124-4 (EW).

*a Component with harness connected (Windshield Wiper Switch Assembly)

(2) Turn the power switch on (IG).

(3) Turn the washer switch on and off, and check the voltage between terminals I125-5 (WR) and I124-4 (EW).

OK:

Voltage changes as shown in the following illustration.

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

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