Power Seat Motor: Description and Operation

SEAT MOTORS
The MSM controls the movement of each of the above mentioned seat directional motors and the 2 lumbar motors. Refer to Lumbar Support Description and Operation (w/o A45)Lumbar Support Description and Operation (with A45)Lumbar Support Description and Operation (AM3 w/o A45)Lumbar Support Description and Operation (AM3 with A45). All of the motors operate independently of each other. Each motor contains a electronic circuit breaker (PTC), which will reset only after voltage has been removed from the motor.

There are 4 motors that move the position of the seat. These are the seat horizontal motor, front vertical motor, rear vertical motor and the recline motor. The horizontal motor moves the entire seat forward and rearward. Both vertical motors run simultaneously when the seat switch is operated in order to move the entire seat up and down. Or they can be selected independently to vertically tilt the front or rear of the seat up and down. The recline motor moves the angle of the seat back forward or rearward.

All seat motors are reversible. For example, when a seat switch is pressed to move the entire seat forward, battery positive voltage is applied through the power seat horizontal forward switch signal circuit to the MSM. In response to this signal, the MSM applies battery positive voltage through the driver seat horizontal motor forward control circuit and ground through the driver seat horizontal motor rearward control circuit to the motor. The motor runs in order to drive the entire seat forward. Moving the entire seat rearward works similarly to moving the entire seat forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction. All of the seat motors are powered this way.

The MSM provides each seat motor with a soft stop that will actually stop the motor just before the physical end-of-travel. 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.

LUMBAR VERTICAL MOTOR
The lumbar vertical motor is reversible. When commanded, it will move the lumbar support in the up and down directions. To protect itself, the motor contains an electronic circuit breaker (PTC) that opens in the event of a circuit overload and will reset only after voltage has been removed from the circuit. The lumbar vertical motor also contains a sensor to monitor the lumbar position during massage operation. The lumbar vertical motor is controlled by the massage module during manual movement and massage operation.