Power Windows System Description

Power Windows System Description

Auto Reverse Power Window Operation

The system is composed of the power window master switch, the front passenger's power window switch, the driver's power window motor and the front passenger's power window motor.

The driver's and front passenger's power window motors incorporate a Hall IC unit (pulser), which generates pulses during the motor's operation and sends the pulses to the driver's and front passenger's power window control units, As soon as the driver's and front passenger's power window control units detect a change in pulse frequency from the Hall IC unit (pulser), the driver's and front passenger's power window control units make the power window motor stop and reverse. If the window is more than halfway closed, it will reverse to the half open position. If the window is less than halfway closed, it will stop and reverse about 2 inches. This is to prevent pinching an obstacle during auto-up operation. The auto reverse operation is not active when the switch is held in the up position.