Toyota Tundra. Manual — part 724

a. Disconnect the N2 master switch connector.

b. Disconnect the O5 switch connector.

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

Standard resistance

STANDARD RESISTANCE TESTER CONNECTION SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

6. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

a. Remove the master switch (see REMOVAL ).

b. Reconnect the master switch connector.

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

Standard voltage

STANDARD VOLTAGE TESTER CONNECTION SPECIFIED CONDITION

Tester Connection

Condition Specified Condition

N2-10 (U) - O5-5 (SU)

Always

Below 1 ohms

N2-18 (D) - O5-2 (SD)
N2-10 (U) or O5-5 (SU) - Body ground

Always

10 kohms or higher

N2-18 (D) or O5-2 (SD) - Body ground

Tester

Connection

Switch Condition

Specified

Condition

N2-10 (U) - N2-1

(E)

Ignition switch ON, rear RH side door power window

regulator switch OFF --> UP

Below 1 V --> 11 to

14 V

N2-18 (D) - N2-1

(E)

Ignition switch ON, rear RH side door power window

regulator switch OFF --> DOWN

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

Fig. 35: Identifying N2 Master Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (see
REMOVAL )

OK: Go TO POWER WINDOWS DO NOT OPERATE AT ALL

DRIVER SIDE POWER WINDOW AUTO DOWN FUNCTION DOES NOT OPERATE

DESCRIPTION

If the AUTO DOWN function does not operate, the cause may be one or more of the following:



The power window regulator master switch has a malfunction.



The front power window regulator motor LH (for driver side) has a malfunction.



The wiring between the power window regulator master switch and the front power window regulator
motor LH (for driver side) is open or shorted.

WIRING DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

Fig. 36: Driver Side Power Window Auto Down Function Does Not Operate Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK MANUAL UP / DOWN FUNCTION

a. Check that the manual UP/DOWN function of the power window regulator master switch can

operate the driver door power window.

OK: Manual UP/DOWN function operates normally.

NG: OTHER PROBLEM (see DRIVER SIDE POWER WINDOW DOES NOT OPERATE WITH
POWER WINDOW MASTER SWITCH )

OK: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (see
REMOVAL )

POWER WINDOWS DO NOT OPERATE AT ALL

DESCRIPTION

If all of the power windows do not operate, the power window regulator master switch may have no power or
may be malfunctioning.

WIRING DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

Fig. 37: Power Windows Do Not Operate At All Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - BATTERY AND BODY

GROUND)

a. Disconnect the N2 master switch connector.

b. Measure the voltage of the wire harness side connector.

Standard voltage

for Regular Cab:

MASTER SWITCH - BATTERY AND BODY GROUND VOLTAGE (FOR REGULAR
CAB)

for Double Cab:

MASTER SWITCH - BATTERY AND BODY GROUND VOLTAGE (FOR DOUBLE CAB)

for CrewMax:

MASTER SWITCH - BATTERY AND BODY GROUND VOLTAGE (FOR CREWMAX)

Tester Connection

Switch Condition Specified Condition

N2-15 (B) - Body ground Ignition switch ON

11 to 14 V

Tester Connection

Switch Condition Specified Condition

N2-6 (B) - Body ground Ignition switch ON

11 to 14 V

Tester Connection

Switch Condition Specified Condition

N2-6 (B) - Body ground Ignition switch ON

11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra