Motors

The memory seat system consists of the Memory Seat Module (MSM) and 5 seat motors. Each motor has a position sensor attached to the motor. The MSM controls the movement of the 5 seat position motors. All the motors operate independently of each other. Each motor contains an electronic circuit breaker (PTC), which will reset only after voltage has been removed from the motor.

There are 3 motors that move the position of the seat. These are the horizontal motor, rear vertical motor, and front vertical motor. Both vertical motors run simultaneously when the left seat switch is operated in order to move the entire seat up and down. The recline motor moves the angle of the seatback. The headrest motor moves the height of the headrest. All motors are reversible. For example, the seat is moved forward and back by one motor. When the MSM receives an input to move the seat forward, the MSM supplies battery positive voltage (B+) and ground to run the motor in order to move the seat forward. When the MSM receives a seat back input, the MSM will supply power to the same motor, but the voltage and ground will be on the opposite motor cavities. The voltage polarity is reversed and the motor will run the opposite direction, moving the seat back. All other seat motors are also powered this way. The MSM provides each seat motor with a soft stop. The module will actually stop the motor just before the physical end-of-travel for that motor. This decreases the stress on each motor. If a motor reaches the end-of-travel due a soft stop and the seat switch is released and then activated again, the seat will move a short distance farther, to the physical travel limit.