Power Lumbar Description AL2

The left and the right power lumbar system each consist of the lumbar switch and 2 reversible motors (horizontal and vertical) that operate independently of each other. Each motor contains an electronic circuit breaker (PTC), that will reset only after voltage has been removed from the motor. The lumbar switch, located on the outboard side of each seat, directly controls the lumbar motors located in the seatback.

Power Lumbar Description AC9

The left and right adaptive seat system each consist of the lumbar switch, the adaptive lumbar module, a pump motor, and an air bladder in the seat cushion and seat back. This is a power inflate/deflate pneumatic system used for controlling seat comfort by inflating or deflating an air cell within the seat. The adaptive seat system will only operate when the ignition switch is in the ON position.

The lumbar support in the seat back may be adjusted manually. Move the lumbar switch OUT in order to increase the support. Move the lumbar switch IN in order to decrease the support. The adaptive lumbar module will respond the inputs by either adding air to the bladder or releasing air from the bladder in the seat back.

Move the lumbar switch up in the AUTO/ON position in order to have the adaptive seat adapt to the occupant. The adaptive lumbar module will automatically adjust the support by supplying a pulse width modulated signal to the lumbar pump motor in order to add air the bladders or release air from the bladders. The adaptive lumbar module will check the position of the occupant every 4 minutes. If the occupant has moved, the adaptive lumbar module will then automatically adjust again.

Move the lumbar switch down in the OFF position in order to turn off the automatic adjustment. The adaptive lumbar module will release all air from the bladders.

Power Lumbar Description A45

The memory seat system consists of the memory seat module (MSM) and 2 lumbar motors. Each lumbar motor have a position sensor attached to the motor. The MSM controls the movement of the 2 lumbar position motors, the lumbar horizontal and lumbar vertical motor. The motors operate independently of each other. Each motor contains an electronic circuit breaker (PTC), that 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, the motor supplies battery positive voltage (B+) and ground to run the lumbar horizontal motor in order to move the lumbar in, away from the driver's back. When the motor 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 vertical 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.

The memory seat module (MSM) receives the lumbar support manual movement inputs from the left 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 .

Refer to Memory Seat Description .

Power Lumbar Description AM3

The left and right massaging lumbar system consists of the lumbar switch, the lumbar massage module and 2 reversible motors (horizontal and vertical) that operate independently of each other. Each lumbar motor has a position sensor attached to it. The massaging lumbar can be found on both memory and non-memory seats. Moving the lumbar switch UP momentarily activates the massage feature. The lumbar vertical motor will move the lumbar support a total of 50mm in each direction up and down and will run continuously in an up and down motion for 10 minutes or until the lumbar switch is momentarily pushed DOWN. Manually moving the lumbar switch in the UP or DOWN positions will cancel the massage feature and will move the lumbar support in the desired direction. The lumbar support can be adjusted during the massage cycle by moving the lumbar switch in either the IN or OUT positions. When equipped with memory, the lumbar massage will continue its normal operation during a memory recall. When massage has ceased, the lumbar vertical motor will return the lumbar support to the position programmed.