Seats - VIN Range: H18680->H99999
Seats - VIN Range: H18680->H99999
OVERVIEW
Two variants of driver and passenger seat are available; 12-way sports and 16-way luxury each available in 3 trim styles; Comfort, R and VDP. The front seats are equipped with the following:
- Seat control switches (seat mounted)
- Front seat cushion front height adjustment
- Front seat cushion rear height adjustment
- Front seat backrest adjustment
- Front seat head restraint adjustment
- Lumbar adjustment
- Front seat forward and backward adjustment
- Side air bag module
- Front seat backrest heating
- Front seat cushion heating
- Extendible seat-cushion (luxury variant only)
- Seat memory switches (door mounted)
- Seat heating and cooling
WARNING: Prior to removal of the front seats and before disconnecting the front seat wiring harness electrical connectors (which includes the side air bag module electrical connectors), the battery ground cable should be disconnected and a period of at least 1 minute allowed to elapse. The same amount of care should be taken when handling and storing the front seats, as would be taken when handling and storing air bag modules.
The driver and passenger front seats, although almost identical, have some unique components. The front driver seat has a seat position sensor and the front passenger seat has a occupancy sensing system. In both instances the components form an integral part of the air bag Supplemental Restraint System (SRS).
FRONT SEATS
Each front seat has a handed seat cushion, a common backrest frame and seat adjuster mechanism. Switch packs are installed on the outer side of the driver and passenger seats. Both driver and passenger seats are retained to the vehicle floorpan at four points.
The driver and passenger seats, although almost identical, have some unique components fitted. The driver seat has a seat track position sensor and the passenger seat has an occupant weight sensing system coupled with a track position sensor, both the components form an integral part of the occupant restraints system.
The front seats have a side airbag module fitted to the outer side of the front seat backrest and the front seat backrest cover has an integral chute to aid in the deployment of the side air bag.
The standard front seat is equipped with electric height adjustment, forward and rearward adjustment, seat cushion tilt, head restraint and seat backrest recline motors. The standard front seat also incorporates a two way lumbar support assembly that is fitted to the seat backrest and inflates an air filled bladder to give the required support. The electrical functions can be utilized by operating the front seat control switch and then the driver seat memory position is stored by the DDM (driver door module) using the memory switch pack mounted in the driver door trim. The driver seat can be programmed for up to three different driver seat memory configurations, the seat memory switch located in the driver door trim, can also be used to retrieve the programmed memory configurations.
In addition to the standard front seat functionality the 16 way high level front seat incorporates:
- A four way lumbar support assembly.
- An extendible seat cushion.
- Head restraints incorporating video display (optional).
Seat Base Motors
Front Seat Backrest Motors
REAR SEATS
Rear Seats
Depending on the vehicle specification the rear seats will be one of the following:
- Fixed bench style with an integral armrest.
- Electrically adjustable outer seat backrests with a bench style cushion and separate armrest.
- Electrically adjustable twin rear seats with a full floor console.
The standard rear seat is of a bench type with full width removable cushion and integral armrest.
The electrically adjustable outer seat backrests can be fitted with either a bench style cushion that incorporates both the rear seat control switches or single rear seat cushions that incorporate the rear seat control switch for the corresponding side.
Rear Seat Backrest Motors
The rear outer seat backrests are equipped with electric four way lumbar adjustment, rear seat head restraint adjustment, and rear outer seat backrest recline adjustment motors. The electrical functions can be utilized by operating the rear seat control switches and then rear outer seat backrest memory positions can be stored by the RSM (rear seat module). The rear outer seat backrest/headrest can be programmed for up to three different seat memory configurations. The seat memory switch located within the rear door trim panel can be used to retrieve the programmed memory configurations.
LUMBAR MOTORS
The front and rear seats have a two or four way lumbar motor system depending on the specification of the vehicle. The system uses a single motor driven pump, which inflates or deflates air cells, as required, to provide upper and lower lumbar support. The lumbar motors are operated from the seat control switches. Depending on the direction the switch is operated in, one of four solenoids (for 4 way lumbar) or one solenoid (for two way lumbar) housed within the solenoid pack (integral component of the lumbar assembly) is connected to the pump, which provides lumbar support by adjusting the amount of air in the appropriate cell.
SEAT MEMORY FUNCTION
he memory control module can store up to three different driver seating, mirror and steering column positions. The three, numbered memory and single memory store switches control memory storage and recall operations. Each switch is a momentary action push switch.
Memory Recall
Memory recall has three memory positions stored for the seats, steering column and exterior mirrors. The switches for this function are located within driver's door trim panel. Pressing the appropriate numbered memory switch allows the seat to start moving to the position appropriate to that memory.
The following procedure will store a memory position:
- Ensure the ignition key is in
- Ensure reverse gear is not engaged
- Manually adjust the seat to the desired position, using the seat switches
- Press and release the 'memory store' switch
- Press and release the desired numbered memory switch within 5 seconds
A single chime will be emitted from the instrument cluster to indicate that the store operation has been successful.
When a memory recall is initiated, to limit the overall current consumption, only two-seat axis will move towards their intended position at any one time. To minimize current load as the motors start, the initiation of each axis is phased with a 100ms delay between each motor starting. Memory recall occurs only when the park brake is ON for manual vehicles or the gear position is in the PARK position for automatic vehicles.
Steering Column Memory
The memory control module controls the electric adjustable steering column in a rake (up and down) and reach (in and out). The steering column can be adjusted for rake and reach by operating the rotary joystick control switch on the LH side of the steering column.
To adjust the steering column:
- Turn the switch to the 'Column' or 'Auto' position
- Move the switch forwards or backwards to adjust the reach
- Move the switch up or down to adjust the rake.
Entry/Exit Mode
Entry/Exit mode provides automatic movement of the steering column and driver's seat to allow easier entry to or exit from the vehicle.
Entry/Exit mode is selected by setting the steering column adjustment switch to the 'AUTO' position.
NOTE: If the adjustment switch is moved away from 'AUTO' whilst the steering column is tilted away, the steering column will move back to it's memorized position when the key is next inserted in the ignition. Entry/Exit mode will then be cancelled. If the adjustment switch is moved during entry/exit operation, steering column movement will stop.
HEATED SEATS
The heated seat system is available on all the seats except the standard rear seat option.
The heated seat system comprises of:
- Heated seat switches
- Backrest heater pad
- Cushion heater pad and thermostat
- FEM (front electronic module)
The FEM (front electronic module) controls the seat heating function by providing the appropriate response depending on the status of the heated seat switches. The heated seat functionality is constantly monitored by the electronic load management system (ELMS). The ELMS dictates that in circumstances where the generated electrical power is less than the electrical consumption, selected systems may be inhibited or operated using reduced power for as long as is necessary.
With the ignition in the `ON` position, pressing a heated seat switch will select the maximum heat setting for the chosen seat and is confirmed by three illuminated light emitting diodes (LED) next to the switch. A second press selects the intermediate heat setting and two LEDs are illuminated next to the switch. A third press selects the lowest heating setting, which is displayed by one LED illuminating and a fourth press will deactivate the heated seat.
If the heated seat function has been activated, it will continue to operate until one of the following conditions is met:
- A fixed period of time has expired (10 minutes)
- The function is deactivated by pressing the heated seat switch for a fourth time
- The ignition key is turned to the `ON` position
- A malfunction is detected by the FEM (front electronic module).
The heated seat function is designed to operate at temperatures below a predetermined limit and the operation may be inhibited by a heated garage, body heat or warm ambient temperatures.
CLIMATE SEATS
On vehicles fitted with climatic seats, cooling as well as heating can be delivered to the front seat occupants. Vehicles fitted with climatic seats feature 2 additional temperature switches located in the instrument panel switch pack, above the touch screen display (TSD) for operation of the front seats. The switches are momentary contact non latching switches that increase and decrease the temperature for the individual seats. The switches provide a PWM (pulse width modulation) signal to the control module.
NOTE:
- The seat heating and cooling buttons will operate as follows for each press; OFF MAXIMUM, MEDIUM, MINIMUM OFF.
- he ATC (automatic temperature control) module does not control any aspect of climatic seat operation.
The controlling software for the climatic seats is contained within a control module mounted behind the instrument panel.
Each climatic seat contains 2 climate units. Each unit contains a fan, which blows air over Peltier cells to distribute heating or cooling throughout the seat.
The climatic seat control module monitors seat heating through a NTC (negative temperature coefficient) temperature sensor located in the unit. The temperature sensor is only used to monitor seat heating. Seat cooling is open loop, with no temperature signal provided back to the control module.
Although the switch LED (light emitting diode) will illuminate if a selection is made when the ignition is switched on, the Peltier cells will not operate until the engine is running.
ACTIVE HEAD RESTRAINTS
Both front seats are fitted with mechanical active head restraints that reduce injuries to the spinal column and possible whiplash in the event of a rear collision. The 2 supports of the head restraints inside the seat backrest are attached to pressure plate in the seat back. In a collision from the rear, the occupant is pressed into the backrest, moving the pressure plate towards the rear. As the seat occupant's back and body weight presses against the pressure plate the head restraint moves upwards and forwards mechanically by means of a pivot point. The movement of the headrest cushions the occupant's head, altering the posture and reducing the relative motion between the body and the head. The head restraint then returns to it's original position using a spring return mechanism. Precise activation of the system is determined by the force with which the occupant's back is pressed against the backrest, the magnitude of the collision, and the occupant's weight.
DRIVER MEMORY SEAT CONTROL DIAGRAM
NOTE: A = Hardwired; D = High speed CAN bus
HEATED SEAT CONTROL DIAGRAM
NOTE: A = Hardwired
CLIMATE SEAT CONTROL DIAGRAM
NOTE: A = Hardwired; N = Medium speed CAN bus
