Power Lumbar Description w/oA45

The driver and passenger power lumbar systems each consist of a 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 with AC9

The driver and passenger adaptive seat systems each consist of a lumbar switch, adaptive lumbar module, 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. Push forward on the lumbar control switch in order to increase the support. Push rearward on the control switch in order to decrease the support. The adaptive lumbar module will respond to the inputs by either adding air to the bladder or releasing air from the bladder in the seat back.

Press the top of the lumbar control switch where it is marked AUTO in order to activate the adaptive seat function. The adaptive lumbar module will inflate the system, take a reading, then automatically adjust the support by supplying a pulse width modulated signal to the lumbar pump motor in order to release air from the bladders to a suggested comfort level, or add air to the bladders when needed. 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 the support.

press 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 with A45

The memory lumbar system consists of the memory seat module (MSM) and 2 lumbar motors. Each lumbar motor (horizontal and vertical) has a position sensor attached to it. Both lumbar motors are controlled by the MSM and 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 horizontal position is moved forward and backward by one motor. When the MSM receives an input to move the lumbar backward, the MSM supplies battery positive voltage (B+) and ground to run the lumbar horizontal motor in order to move the lumbar back away from the driver's back. When the MSM receives a lumbar forward input, the MSM will supply power to the same motor, however, the voltage and ground will be applied on the opposite control circuits to the motor. The voltage polarity is reversed and the motor will run in the opposite direction, moving the lumbar forward 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 lumbar support. This decreases the stress on each motor. If a lumbar support reaches the end-of-travel due a soft stop and the seat switch is released and then activated again, the motor will run to move the lumbar support a short distance farther, to the end of it's physical travel limit.

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

Refer to Memory Seat Description .

Refer to Memory Seat Description .

Power Lumbar Description with AM3

The driver and passenger massaging lumbar systems consists of a 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 option can be found on both memory and non-memory seats. Momentarily moving the lumbar switch in the up direction activates the massage feature. The lumbar vertical motor will then move the lumbar support 50 mm (1.96 in) in the up and down direction, and will run continuously this way for 10 minutes or until the lumbar switch is pushed to cancel operation. Manually moving the lumbar switch in either the up or down positions will cancel the massage feature and will move the lumbar support in the desired direction. The lumbar horizontal support can be adjusted during the massage cycle by moving the lumbar switch in either the forward or backward direction. When equipped with memory, the lumbar massage will continue its normal massage operation during a memory recall. When massage has ceased, the lumbar vertical motor will return the lumbar support to the programed position.