Power Lumbar Description A45 with AL2

The memory seat system consists of the memory seat module (MSM) and two lumbar motors. Each lumbar motor have a position sensor attached to it. The MSM controls the movement of the two lumbar position motors, the lumbar in/out and lumbar up/down motor. 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.

Both motors are reversible. For example, the lumbar is moved in and out by one motor. When the MSM receives an input to move the lumbar in, it supplies battery positive voltage (B+) and ground to run the lumbar in/out motor to move the lumbar in, away from the driver's back. When it receives a lumbar out 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 lumbar out, toward the driver's back. The lumbar up/down motor is also powered this way.

The MSM provides each lumbar 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 lumbar support will move a short distance farther, to the physical travel limit.

Refer to Memory Seat Description .

The memory seat module (MSM) receives the lumbar support manual movement inputs from the RH lumbar switch. When a lumbar in, out, up, or down input is received, the MSM supplies battery positive voltage (B+) to the appropriate motor and the lumbar support moves accordingly.

Refer to Memory Seat Description .