Toyota 4Runner: Washer Fluid Level Warning Switch Circuit

Toyota 4Runner 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 is turned on), the multi-information display in the combination meter assembly displays "LOW WASHER FLUID" to warn the driver.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM (WASHER SWITCH)

(a) Use the Data List to check if the level warning switch assembly is functioning properly (See page ).

Combination Meter

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Washer Switch	Level warning switch / ON or OFF	ON: Washer jar and tank empty OFF: Washer jar and tank full	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Washer Switch

Level warning switch / ON or OFF

ON: Washer jar and tank empty

OFF: Washer jar and tank full

OK:

On the Techstream screen, each item changes between ON and OFF according to the above chart.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT LEVEL WARNING SWITCH ASSEMBLY

(a) Inspect the level warning switch assembly (See page ).

REPLACE WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY

3.	CHECK WASHER WIRING ASSEMBLY

(a) Disconnect the A27 and LW washer wiring assembly connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A27-3 (S) - LW-1	Always	Below 1 Ω
A27-6 (E) - LW-2	Always	Below 1 Ω
A27-3 (S) or LW-1 - Body ground	Always	10 kΩ or higher
A27-6 (E) or LW-2 - Body ground	Always	10 kΩ or higher

REPLACE WASHER WIRING ASSEMBLY

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

(a) Disconnect the A27 washer wiring assembly connector.

(b) Disconnect the F14 combination meter assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A27-3 (S) - F14-27 (WLVL)	Always	Below 1 Ω
A27-6 (E) - Body ground	Always	Below 1 Ω
A27-3 (S) or F14-27 (WLVL) - Body ground	Always	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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