System Description

POWER WINDOW CONTROL SYSTEM DESCRIPTION
1. The power window control system controls the power window's UP / DOWN function using the regulator motors. The main components of this system are: 1) the multiplex network master switch (built into the driver side door); 2) and the multiplex network switches (built into the front passenger side door and rear doors). Pressing each door's switch transmits an UP / DOWN signal to its respective power window regulator motor. Pressing the master switch's passenger door power window switch or either rear door power window switch transmits a remote UP / DOWN signal through the BEAN line to the corresponding door ECU. Then the door ECU transmits the signal through the multiplex network switch to the door's power window regulator motor.

FUNCTION OF MAIN COMPONENT

MAIN COMPONENT FUNCTION CHART

Component	Outline
Multiplex Network Master Switch	Controls power window operation for all seats. When lock switch is set to lock position, window operation will be possible only for driver power window. Also uses two hall-ICs in the regulator motor to detect window position and jamming.
Multiplex Network Switch	Located on front passenger side door and rear doors. Each switch controls window operation for its respective window. Also uses two hall-ICs in the regulator motor to detect window position and jamming.
Power Window Regulator Motor	Receives switch signals and changes signals into motor activation. As a result, window position changes.

SYSTEM FUNCTION

The power window control system has the following functions:

SYSTEM FUNCTION CHART

Function	Outline
Manual UP / DOWN function	Function that raises window while multiplex network (master) switch is pulled halfway up and lowers window while switch is pushed halfway down. Window stops as soon as switch is released.
AUTO UP / DOWN function	Function that enables window to be fully opened or fully closed by one full push or pull of multiplex network (master) switch
Jam protection function	Function that automatically stops power window and moves it downward if object is jammed in power window. During key-off operation, jam protection function works for AUTO UP and manual UP operation.
Remote control function	Function that allows multiplex network master switch to control manual and AUTO UP and DOWN operations of front passenger side window and rear windows
Key-off operation function	Function that makes it possible to operate power window for approximately 43 seconds after power switch is turned ON (ACC) or OFF and driver side door or front passenger side door is not opened
Window lock function	Function where front passenger side power window and rear door power window's operations are disabled when window lock switch on power window master switch is pressed
Diagnosis	Function where power window switch detects malfunctions in power window system and makes diagnosis. Power window switch light starts blinking to inform driver of malfunction.
Fail-safe	If pulse sensor(s) (Hall IC(s)) in power window regulator motor malfunctions, power window AUTO UP and DOWN function is disabled, but remote control function is active as long as micro computer built-in multiplex network master switch operates normally
Key-linked open and close	When key is not inside vehicle, driver side door key is locked, and key inserted into driver side door key cylinder is turned and maintained in lock position for 2.3 seconds or more, multiplex network (master) switches activate power window regulator motors to close power windows while key is turned. Similarly, when driver side door is unlocked, turning and maintaining driver side door key in unlock position for 2.3 seconds or more will cause power windows to open.
Wireless transmitter-linked open	When certification ECU receives unlock signal from key continuously for 2.5 seconds or more, ECU transmits power window control signal to multiplex (master) switches. Upon receiving control signal, switches control power windows.