Toyota 4Runner manuals

Toyota 4Runner: 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

-

OK:

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


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

2.

INSPECT LEVEL WARNING SWITCH ASSEMBLY

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



NG

REPLACE WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY


OK

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


NG

REPLACE WASHER WIRING ASSEMBLY


OK

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.

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

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


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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