Electric Seat Adjustment
Lumbar Support
On 8, 10 and 12 way seats, a 2 way lumbar support is provided which allows the lumbar inflatable cushion to be inflated or deflated as required. On 16 way seats, a 4 way lumbar support is fitted which comprises two separate cushion cells. The upper and lower cells can be inflated or deflated individually allowing greater comfort adjustment for the driver and passenger.
The lumbar support comprises an inflatable cushion located in the seat squab, a pump and solenoids. The pump is activated when the applicable seat switch is moved to the inflate position, inflating the cell(s) in the inflatable cushion. On 8 and 10 way seats, a single solenoid operated valve allows the inflatable cushion to be deflated. On 12 and 16 way seats, 4 solenoid valves control the inflation and deflation of the upper and lower inflatable cushion cells, allowing each cell to be adjusted individually.
Seat Motors
The head restraint motor is located in the upper section of each seat squab and is accessible by removal of the seat back. The motor moves a cradle which is driven in a vertical motion by a rack and pinion arrangement. The cradle has the two head restraint stems attached to it and therefore raises and lowers the head restraint as the motor moves the cradle. The motor contains a Hall sensor which supplies positional information to the driver's seat module.
The seat slide motor is an integral component of the seat frame. The motor drives on a gear on a worm drive lead screw which is integral with the floor rail. The lead screw has a stop at each end to limit the fore and aft seat movement.
The tilt motor is located below the seat. The tilt motor drives a gear on a lead screw to raise the front of the seat cushion. The motor contains a Hall sensor which supplies positional information to the driver's seat module.
The cushion extend motor is located below the seat. The motor drives a gear on a lead screw which extends or retracts the front of the seat cushion. The motor contains a Hall sensor which supplies positional information to the driver's seat module.
The height motor is located below the seat. The height motor drives a gear on a lead screw. The lead screw moves a lever mechanism which raises or lowers the seat cushion. The motor contains a Hall sensor which supplies positional information to the driver's seat module.
The squab recline motor is located in the seat back rest. The recline motor rotates a shaft which is connected the seat squab frame and raises or lowers the back rest position. The motor contains a Hall sensor which supplies positional information to the driver's seat module.