Operation

OPERATION

A positive and negative battery connection to the two motor terminals will cause the power window motor to rotate in one direction. Reversing the current through these same two connections will cause the motor to rotate in the opposite direction.

Because the Body Control Module (BCM) drives the window, it can sense when the top and bottom travel has been reached and stop driving the window regardless of the window switch position (no hall pulses within 50 mSeconds). The BCM considers the Hall Effect faulted if no pulses are sensed when the window is driven up and down. When this condition is detected, the BCM will activate the motor until the switch is released or a stuck fault is set (10 seconds). In addition, each power window motor is equipped with an integral self-resetting circuit breaker to protect the motor from overloads.

The driver side motor is controlled directly by the BCM. The passenger side motor receives current through a window up relay and a window down relay. These are located near the steering column. The up and down window relays are controlled by the BCM.

There is also a 30 Amp fuse in the Power Distribution Center (PDC) to protect the passenger window circuits. The BCM protects the driver window circuits (10 amps).