Lexus NX: Washer Fluid Level Warning Switch Circuit

Lexus NX Service Manual / Vehicle Exterior / Wiper / Washer / Wiper And Washer System / Washer Fluid Level Warning Switch Circuit

DESCRIPTION

When the volume of washer fluid decreases to below a certain level (when the level warning switch assembly is turned on), the multi-information display warns the driver by displaying a message.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, make sure to replace it with a new one.

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Read the Data List according to the display on the Techstream.

Click here

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Washer Switch

Level warning switch condition

ON/OFF

ON: Fluid volume is less than 600 to 800 cc (36.6 to 48.8 cu.in.)

OFF: Fluid volume is more than 600 to 800 cc (36.6 to 48.8 cu.in.)

-

Body Electrical > Combination Meter > Data List

Tester Display

Washer Switch

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

OK

GO TO METER / GAUGE SYSTEM

NG

2.

INSPECT LEVEL WARNING SWITCH ASSEMBLY

(a) Disconnect the A22 level warning switch assembly connector.

(b) Inspect the level warning switch assembly.

Click here

NG

REPLACE LEVEL WARNING SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (LEVEL WARNING SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the A22 level warning switch assembly connector.

(b) Disconnect the I10 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A22-1 (S) - I10-16 (WLVL)

Always

Below 1 Ω

A22-2 (E) - Body ground

Always

Below 1 Ω

A22-1 (S) or I10-16 (WLVL) - Body ground

Always

10 kΩ or higher

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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