Toyota Tundra. Manual — part 725

Fig. 38: Identifying N2 Master Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

for Regular Cab:

MASTER SWITCH - BATTERY AND BODY GROUND RESISTANCE (REGULATOR
CAB)

for Double Cab:

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

for CrewMax:

MASTER SWITCH - BATTERY AND BODY GROUND RESISTANCE (CREWMAX)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Tester Connection

Switch Condition Specified Condition

N2-7 (E) - Body ground

Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

N2-1 (E) - Body ground

Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

N2-1 (E) - Body ground

Always

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

KEY-OFF OPERATION FUNCTION OPERATES EVEN IF OPERATING CONDITIONS ARE NOT
SATISFIED

DESCRIPTION



When the front doors are closed and the ignition switch is turned from ON to OFF, each power window
regulator motor can control its power window operation for approximately 43 +/-1.5 seconds by receiving
operation permission signals from the main body ECU. However, when approximately 43 +/-1.5 seconds
have elapsed, or the driver side door or front passenger side door is opened within approximately 43 +/-
1.5 seconds after turning the ignition switch OFF, the power window regulator motor stops operating.



During the AUTO DOWN function operation, when 43 +/-1.5 seconds have passed and the key-off
operation is prohibited, the window operation stops immediately.



The front passenger side power window and rear power windows*1, *2 cannot be operated when the
window lock switch is pressed.

HINT:



*1: for Double Cab



*2: for CrewMax

WIRING DIAGRAM

Fig. 39: Key-Off Operation Function Operates Even If Operating Conditions Are Not Satisfied Wiring
Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK POWER WINDOW OPERATION FUNCTION AFTER IGNITION SWITCH OFF

a. Check the power window operation function after the ignition switch is turned OFF.

Result:

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

RESULT REFERENCE CHART

B: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

A: Go to Next Step

2. READ VALUE OF TECHSTREAM (DOOR COURTESY SWITCH)

a. Use the Data List to check if the main body ECU is functioning properly.

Main Body:

MAIN BODY - TECHSTREAM TESTER DISPLAY REFERENCE CHART

OK: Tester display changes normally when door courtesy switch is operated.

NG: Go TO LIGHTING SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

POWER WINDOW MASTER SWITCH

COMPONENTS

Result

Proceed to

Front side door is opened within 43 +/-1.5 seconds but power window can still operate

A

43 +/-1.5 seconds pass and power windows can still operate

B

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

D Door

Courtesy SW

Driver side door courtesy switch signal /
ON or OFF

ON: Driver door open
OFF: Driver door
closed

-

P Door

Courtesy SW

Front passenger side door courtesy switch
signal / ON or OFF

ON: Front passenger
door open
OFF: Front passenger
door closed

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

Fig. 40: Identifying Power Window Master Switch Components (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra