Last Modified: 11-29-2007 1.6 J
Service Category: Vehicle Exterior Section: Wiper/Washer
Model Year: 2008 Model: Sequoia Doc ID: RM0000025IK004X
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: DESCRIPTION (2008 Sequoia)

Washer Motor Circuit

DESCRIPTION

  • The main body ECU controls the rear washer motor.
  • Perform this inspection with the back door window glass fully closed.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (REAR WIPER WASHER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Rear Wiper Washer Motor Relay

Rear Wiper Washer motor operation

ON/OFF

-

OK:

Rear washer motor operates.

OK

2.

INSPECT FUSE (WSH)

(a) Remove the WSH fuse from the main body ECU.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

WSH fuse

Always

Below 1 Ω

(c) Reinstall the WSH fuse.

OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY - REAR WASHER MOTOR)

(a) Disconnect the A42 rear washer motor and pump assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A42-1 - Body ground

Ignition switch ON and rear washer switch OFF

Below 1 V

Ignition switch ON and rear washer switch ON

11 to 14 V

(c) Reconnect the rear washer motor and pump assembly connector.

OK

4.

INSPECT REAR WASHER MOTOR AND PUMP ASSEMBLY

(a) Remove the rear washer motor and pump assembly.



(b) Connect the battery positive (+) lead to terminal 1 and the negative (-) lead to terminal 2.

(c) Check that the rear washer motor operates.

OK:

Rear washer motor operates.

(d) Reinstall the rear washer motor and pump assembly.

OK

5.

INSPECT RR WSH RELAY

(a) Remove the RR WSH relay from the engine room relay block.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

When battery voltage is not applied to terminals 1 and 2

10 kΩ or higher

When battery voltage is applied to terminals 1 and 2

Below 1 Ω

(c) Reinstall the RR WSH relay.

OK

6.

CHECK HARNESS AND CONNECTOR (RR WSH RELAY - BATTERY)

(a) Remove the RR WSH relay from the engine room relay block.

(b) Disconnect the DB main body ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Terminals 1 - DB-6

Always

Below 1 Ω

Terminals 1 or DB-6 - Body ground

Always

10 kΩ or higher

Terminals 5 - DB-6

Always

Below 1 Ω

Terminals 5 - Body ground

Always

10 kΩ or higher

(d) Reinstall the RR WSH relay.

OK

7.

CHECK HARNESS AND CONNECTOR (RR WSH RELAY - REAR WASHER MOTOR)

(a) Remove the RR WSH relay from the engine room relay block.

(b) Disconnect the A42 rear washer motor and pump assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Terminals 3 - A42-1

Always

Below 1 Ω

Terminals 3 or A42-1 - Body ground

Always

10 kΩ or higher

(d) Reinstall the RR WSH relay.

(e) Reconnect the rear washer motor and pump assembly connector.

OK

8.

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

(a) Remove the RR WSH relay from the engine room relay block.

(b) Disconnect the H2 main body ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Terminals 2 - H2-14 (RWMR)

Always

Below 1 Ω

Terminals 2 or H2-14 (RWMR) - Body ground

Always

10 kΩ or higher

(d) Reinstall the RR WSH relay.

(e) Reconnect the main body ECU connector.

OK

9.

CHECK HARNESS AND CONNECTOR (REAR WASHER MOTOR - BODY GROUND)

(a) Disconnect the A42 rear washer motor and pump assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A42-2 - Body ground

Always

Below 1 Ω

(c) Reconnect the rear washer motor and pump assembly connector.

OK

10.

CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

(a) Disconnect the DA main body ECU connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

DA-1 - Body ground

Always

11 to 14 V

(c) Reconnect the main body ECU connector.

OK

11.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION SWITCH, BODY GROUND)

(a) Disconnect the DD main body ECU connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

DD-43 - Body ground

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

DD-62 - Body ground

Always

Below 1 Ω

(d) Reconnect the main body ECU connector.

OK