Toyota Tundra Service Manual: System Description

Master Switch

• Controls power window operation for all windows.
• When window lock switch is set to lock position, window operation will only be possible with driver side switch.

Power Window Switch

• Located on front passenger side door and rear doors.
• Each power window regulator switch controls power window operations for its respective window.

Power Window Regulator Motor

• Each power window switch controls power window operations for its respective window.
• Receives power window regulator switch signals and activates motor to change window position.
• Uses Hall-IC in regulator motor with ECU to detect window position and jamming.*1

Back Door Power Window Regulator Switch*2, *3

Controls power window operation for back window glass.

Back Door Power Window Regulator Motor (for Back Window Glass)*2, *3

Receives back door power window regulator switch signals and activates motor to change window position.

Manual UP function

for Driver and Front Passenger Side:

Function that raises a window while the power window switch is pulled halfway up (the window stops as soon as the power window switch is released).

for Rear Sides:

Function that raises a window while the power window switch is pulled up (the window stops as soon as the power window switch is released).

Manual DOWN function

for Driver and Front Passenger Side:

Function that lowers a window while the power window switch is pushed halfway down (the window stops as soon as the power window switch is released).

for Rear Sides:

Function that lowers a window while the power window switch is pushed down (the window stops as soon as the power window switch is released).

AUTO UP function*

Function that enables a window to be fully closed by one full pull of the power window switch.

AUTO DOWN function*

Function that enables a window to be fully opened by one full push of the power window switch.

Remote UP/DOWN function

Function that allows the master switch to control the front passenger side power window and rear power windows.

Window lock function

• Function where the power window regulator switch assembly and rear power window switch operations are disabled when the window lock switch of the master switch is pressed.
• Front passenger side power window switch and rear switches can be operated when the window lock switch is pressed again.

Key-off operation function

• Function that makes it possible to operate all power windows for approximately 45 seconds after the ignition switch is turned off when the driver side door and front passenger side door have not been opened.
• If approximately 45 seconds have passed or a front door is opened while the AUTO function is operating, window operation stops.

Jam protection function*

• Function that automatically stops a power window and moves it downward if an object is jammed in the power window.
• Jam protection function works for AUTO UP and manual UP operation.

Key-linked open and close

• When a key is not inside the vehicle, the driver side door is locked, and the key inserted into the driver side door key cylinder is turned and maintained in the lock position for 2.3 seconds or more, the main body ECU (multiplex network body ECU) activates the power window regulator motors to close all power windows while the key is turned.
• Similarly, when the driver side door is unlocked, turning and maintaining the driver side door key in the unlock position for 2.3 seconds or more will cause all power windows to open.

Diagnosis

• Function where the ECU in the power window regulator motor detects malfunctions in the power window system and makes a diagnosis.
• The power window switch light blinks to inform the driver of the malfunction.

Fail-safe

If the pulse sensor(s) (Hall IC(s)) in the power window regulator motor malfunctions, the power window AUTO UP/DOWN function is disabled.