Toyota 4Runner manuals

Toyota 4Runner: Rear Washer does not Operate

DESCRIPTION

The windshield wiper switch controls the rear washer motor and pump.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (WINDSHIELD WIPER SWITCH)

(a) Use the Data List to check if the rear washer is functioning properly (See page ).


Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Rear Washer SW Signal

Rear washer switch / ON or OFF

ON: Rear washer switch on

OFF: Rear washer switch off

-

OK:

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


NG

GO TO STEP 9


OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM (WASHER RR RELAY)

(a) Using the Techstream, perform the Active Test (See page ).


Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Rear Wiper Washer Motor Relay

WASHER RR relay operation

ON/OFF

-

OK:

The rear washer motor operates normally.


OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


NG

3.

INSPECT WASHER RR RELAY

(a) Remove the WASHER RR relay from the engine room relay block, junction block.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Battery voltage is not applied to terminals 1 and 2

10 kΩ or higher

Battery voltage is applied to terminals 1 and 2

Below 1 Ω


NG

REPLACE WASHER RR RELAY


OK

4.

CHECK HARNESS AND CONNECTOR (BATTERY - WASHER RR RELAY)

(a) Remove the WASHER RR relay from the engine room relay block, junction block.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

RR WASHER relay terminal 2 - Body ground

Ignition switch ON

11 to 14 V

RR WASHER relay terminal 2 - Body ground

Ignition switch off

Below 1 V

RR WASHER relay terminal 5 - Body ground

Ignition switch ON

11 to 14 V

RR WASHER relay terminal 5 - Body ground

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to WASHER RR Relay)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

CHECK HARNESS AND CONNECTOR (WASHER RR RELAY - MAIN BODY ECU)

(a) Remove the WASHER RR relay from the engine room relay block, junction block.

(b) Disconnect the F8 main body ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F8-2 (BW) - WASHER RR relay terminal 1

Always

Below 1 Ω

F8-2 (BW) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

6.

INSPECT REAR WASHER MOTOR AND PUMP ASSEMBLY

(a) Remove the rear washer motor and pump (See page ).



(b) Apply battery voltage to the rear wiper motor and check the operation of the rear wiper motor.

OK:

Measurement Condition

Specified Condition

Battery positive (+) → 1

Battery negative (-) → 2

Rear washer motor operation is normal


NG

REPLACE REAR WASHER MOTOR AND PUMP ASSEMBLY


OK

7.

CHECK WIRE HARNESS (REAR WASHER MOTOR AND PUMP ASSEMBLY)

(a) Disconnect the A27 level warning switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A27-5 - 1

Always

Below 1 Ω

A27-4 - 2

Always

Below 1 Ω

A27-5 - Body ground

Always

10 kΩ or higher

A27-4 - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

8.

CHECK HARNESS AND CONNECTOR (REAR WASHER MOTOR AND PUMP ASSEMBLY - WASHER RR RELAY AND BODY GROUND)

(a) Disconnect the A27 rear washer motor connector.

(b) Remove the WASHER RR relay from the engine room relay block, junction block.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A27-5 - WASHER RR relay terminal 3

Always

Below 1 Ω

A27-4 - Body ground

Always

Below 1 Ω

A27-5 - Body ground

Always

10 kΩ or higher


OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Remove the windshield wiper switch (See page ).



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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

B-5 (WR) - A-2 (EW)

Rear washer switch on

Below 1 Ω

B-5 (WR) - A-2 (EW)

Rear washer switch off

10 kΩ or higher


NG

REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY


OK

10.

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the F20 and F21 windshield wiper switch connectors.

(b) Disconnect the F10 main body ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F21-5 (WR) - F10-8 (RWSW)

Always

Below 1 Ω

F20-2 (EW) - Body ground

Always

Below 1 Ω

F21-5 (WR) - Body ground

Always

10 kΩ or higher


OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Rear Wiper does not Operate
DESCRIPTION The windshield wiper switch controls the rear wiper motor. WIRING DIAGRAM CAUTION / NOTICE / HINT HINT: Since the wiper and washer system has functions that use LIN communication, f ...

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 displa ...

Other materials about Toyota 4Runner:

Symbols used in illustrations
Safety symbol The symbol of a circle with a slash through it means “Do not”, “Do not do this”, or “Do not let this happen”. Arrows indicating operations Indicates the action (pushing, turning, etc.) used to operate switches and other de ...

Components
COMPONENTS ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

© 2016-2020 | www.to4runner.net

0.0064