Auto Reverse Power Window Operation: Notes
The system is composed of the driver's MPCS unit, front passenger's MPCS unit, power window master switch, passenger's switches, and power window motors.
The power window motor incorporates a Hall IC unit (pulser) which generates pulses during the motor's operation and sends pulses to the driver's and front passenger's MPCS units. As soon as the power window control unit detects a change in the pulse frequency from the Hall IC unit (pulser), the power window control unit makes the power window motor stop and reverse. This is to prevent pinching your hand or fingers during auto-up operation.