Auto Reverse Power Window Operation: Notes
The system is composed of the door multiplex control unit (built into the power window master switch), front passenger's power window switch (with built-in control unit), and power window motors.
The power window motor incorporates a Hall IC (pulser) which generates pulses during the motor's operation and sends pulses to the driver's and passenger's power window control unit. As soon as the power window control unit detects a change in the frequency from Hall IC (pulser), the power window control unit makes the power window motor stop and reverse. This prevents pinching your hand or fingers during auto-up operation. The auto reverse function does not work when the power window master switch is held in the closed position.