Toyota Tundra. Manual — part 765

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking
the suspected areas in the order they are listed. Replace parts as necessary.

Wiper and washer system

WIPER AND WASHER SYSTEM

Other

OTHER

DATA LIST / ACTIVE TEST

1. DATA LIST

HINT:

Symptom

Suspected Area

Refer To

Front wiper and washer system
does not operate

Windshield wiper switch

INSPECTION

Windshield wiper motor

INSPECTION

Harness or connector

-

Front wiper system does not
operate in LO or HI

WIPER fuse

-

Windshield wiper switch

INSPECTION

Windshield wiper motor

INSPECTION

Harness or connector

-

Front wiper system does not
operate in INT

WIPER fuse

-

Windshield wiper switch

INSPECTION

Windshield wiper motor

INSPECTION

Harness or connector

-

Front washer system does not
operate

WSH fuse

-

Windshield wiper switch

INSPECTION

Windshield washer motor and
pump

REMOVAL

Harness or connector

-

Front wiper arms do not return to
their original positions when
wiper switch is turned off

Windshield wiper motor

INSPECTION

Harness or connector

-

Symptom

Suspected Area

Refer To

Washer fluid level warning
system does not operate

Washer fluid level warning switch
circuit

WASHER FLUID LEVEL

WARNING SWITCH CIRCUIT

Meter / gauge system

PROBLEM SYMPTOMS

TABLE

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Wiper & Washer - Tundra

Using the Techstream to read the DATA LIST allows values or status of switches, sensors, actuators and
other items to be read without removing any parts. This non-intrusive inspection can be very useful
because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading
the DATA LIST information early in troubleshooting is one way to save diagnostic time.

a. Warm up the engine.

b. Turn the ignition switch OFF.

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch ON.

e. Turn the tester on.

f. Enter the following menus:

Techstream - Select: Body / Combination Meter / Data List.

g. According to the display on tester, read the "Data List".

Techstream

COMBINATION METER

WASHER FLUID LEVEL WARNING SWITCH CIRCUIT

DESCRIPTION

When the volume of washer fluid decreases below a certain level (when the washer fluid level warning switch is
turned ON), the combination meter warns the driver through the master warning light illumination, and the
warning message on the multi-information display*.

HINT:

*: w/ Multi-information display

WIRING DIAGRAM

NOTE:

In the table below, the values listed under "Normal Condition" are
reference values. Do not depend solely on these reference values when
deciding whether a part is faulty or not.

Tester

Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

Washer

Switch

Washer fluid level warning switch / ON or
OFF

ON: Washer jar is
empty
OFF: Washer jar is full

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Wiper & Washer - Tundra

Fig. 4: Washer Fluid Level Warning Switch - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. READ VALUE OF TECHSTREAM (WASHER FLUID LEVEL WARNING SWITCH)

a. Check the DATA LIST for proper functioning of the washer fluid level warning switch.

Techstream

COMBINATION METER

OK: On tester screen, each item changes between ON and OFF according to above chart.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

2. CHECK WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY

a. Disconnect the A27 switch connector.

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

Standard resistance

WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY

Tester

Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

Washer

Switch

Washer fluid level warning switch / ON or
OFF

ON: Washer jar is
empty
OFF: Washer jar is full

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Wiper & Washer - Tundra

Fig. 5: Checking Washer Fluid Level Warning Switch Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE WASHER FLUID LEVEL WARNING SWITCH ASSEMBLY

OK: Go to next step

3. CHECK HARNESS AND CONNECTOR (WASHER FLUID LEVEL WARNING SWITCH

COMBINATION METER)

a. Disconnect the A27 switch connector.

b. Disconnect the J28 meter connector.

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

Standard resistance

WASHER FLUID LEVEL WARNING SWITCH COMBINATION METER

Tester Connection

Condition

Specified Condition

A27-1 (S) - A27-2 (E) Washer jar is empty

Below 1 ohms

A27-1 (S) - A27-2 (E) Washer jar is full

10 kohms or higher

Tester Connection

Condition Specified Condition

A27-1 (S) - J28-10 (WLVL) Always

Below 1 ohms

A27-2 (E) - Body ground

Always

Below 1 ohms

A27-1 (S) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Wiper & Washer - Tundra