Driver's Seat Motors:
- Each motor is individually controlled by the SM via a two wire circuit providing motor activation in both directions.
- Each position motor incorporates a hall effect sensor that provides a single pulsed square wave signal for each revolution of the motor. The hall sensor is required for the memory feature of the driver's seat and as feedback for motor load protection.
- When a motor is activated, the SM also memorizes what direction the seat switch was moved to since it can not determine the exact seat position based on the hall sensor signal alone. This is required if the exact position is needed for memory storage.
Courtesy of BMW OF NORTH AMERICA, INC.