Component Location

Seats

COMPONENT LOCATION

NOTE: Left-Hand Drive (LHD) shown; Right-Hand Drive (RHD) similar.







OVERVIEW

All vehicles, except those manufactured to North American Specification (NAS), are installed with manually operated front seats as standard. Options available include electrically power operated front seats without memory function, and an electrically power operated driver's seat with memory functionality. The front seats may also be provided with arm rests to improve driver and front passenger comfort.

NAS vehicles are installed with power operated front seats as standard. The front seats feature arm rests to improve driver and front passenger comfort. A driver's power operated seat with memory functionality is provided as an option for NAS vehicles.

Depending on vehicle specification and trim level, vehicles may also feature front heated seats and a lumbar support system. Lumbar support is provided as a manual or electrically operated system, and is only available for the driver's seat.

The rear seat is manufactured to the same specification for all vehicles, and is provided with ISOFIX child safety seat restraints.

All seats incorporate adjustable head restraints. Depending on the vehicle specification the seats are upholstered in either all cloth, cloth/leather/PVC, leather/PVC or all PVC finish.

FRONT SEAT CONSTRUCTION

The front seat base is manufactured from high strength steel extrusions designed to exceed current legal strength requirements. The seat base is molded to form an anti-submarine hollow that will retain the occupant in the seat during a front end collision. The seat backrest is manufactured from high strength steel and features a wire suspension system to provide increased comfort. The backrest is attached at both sides of the seat base with a high strength steel bracket and pivot.

The seat base and backrest are inlayed with formed sections of dual hardness, molded foam to form the seat squab and cushion. The seats are designed to provide support, comfort and an ergonomic position for the driver and passenger.

The driver and passenger front seats are provided with additional safety features. The front driver's seat is installed with a seat position sensor; the front passenger seat is installed with an occupancy classification system sensor (dependant on vehicle specification) and an occupancy detection system. Both the driver's and passenger seat safety features provide inputs to control the deployment of the air bags and seat belt pre-tensioners.

The front seat belt buckles are mounted integrally with the seats to provide increased anchorage and occupant restraint.

MANUALLY OPERATED FRONT SEATS







The manually operated front seats provide a 4-way adjustable passenger seat with forward-rearward, incline-recline functions, and a 6-way adjustable driver's seat with forward-rearward, raise-lower and incline-recline functions. Operation of the seat adjustment levers will move the seat in the corresponding direction.

FRONT POWER OPERATED NON-MEMORY SEATS







The driver's non-memory seat is 6-way adjustable with forward-rearward, raise-lower and incline-recline functions; the passenger non-memory seat is 4-way adjustable with forward-rearward, incline-recline functions. Height adjustment is not required for the passenger seat.

Front Non-Memory Seat Switch Pack and Motors







Movement of the seat is achieved using the control switch pack located on the outboard side of the seat. The seat control switches directly operate the corresponding seat adjustment motors, mounted to the seat frame and backrest.

The seat adjustment motors are a permanent magnet motor type, coupled to a rack and pinion assembly.

DRIVER'S POWER OPERATED MEMORY SEAT







The driver's power operated seat with memory is 6-way adjustable and comprises the same control components as the front non-memory seat. The seat incorporates a power seat module located under the seat frame that allows up to 3 memory positions for the seat to be stored and recalled. If memory exterior mirrors are installed, the power seat module also initiates movement of the exterior mirrors by transmitting a command signal to the front door control modules when the seat memory position is recalled. The front door control modules are used to store and recall the memory exterior mirror positions.

Power Seat Module







The power seat module is connected in the wiring between the seat switch pack and seat adjustment motors. The module contains a non-volatile Electrically Erasable Programmable Read Only Memory (EEPROM).

The power seat module monitors the seat positions and stores information provided by the seat track Hall sensors. The Hall sensors are incorporated within the seat adjustment motors. All seat memory values and current seat motor positions are stored in the EEPROM.

In the event of a power loss, when power is restored the current motor positions are recalled from the EEPROM memory and adopted as the current positions. This will allow the relative memory positions to be retained without any need to recalibrate the power seat module.

The power seat module is able to be 'flashed' for service updates or interrogated using the Land Rover approved diagnostic equipment.

Up to 3 different seat positions are able to be stored in the power seat module. Seat positions are stored in memory by pressing the memory button (M), and then 1 of the 3 memory store buttons (1, 2, 3) within 5 seconds. The memory buttons are located on the switch pack. The switch pack memory buttons allow the driver to control the memory storage and recall operations for the seat and exterior mirrors. The switch pack buttons are non-latching, momentary action switches.

On vehicles installed with a high-line instrument cluster and the ignition switched on, the seat position memory store commands are displayed in the message center and a single chime is sounded to confirm the new seat position is saved.

NOTE: Low-line instrument clusters are not installed to vehicles equipped with a memory seat system.

The power seat module provides the following driver selectable functions:
^ Seat and exterior mirror memory recall
^ Immediate seat adjustment.

For further operating details of the driver selectable functions, refer to 'Principles of Operation'.

The activity of the seat is automatically monitored by the power seat module. The module will react to motors that are not functioning correctly to an operation request, and will also aim to reduce power consumption during periods of inactivity.

The power seat module provides the following automatic monitoring functions:
^ Stall detection mode
^ Sleep mode
^ Battery monitor mode.

For further operating details of the automatic monitoring functions, refer to 'Principles of Operation'.

Calibration of Power Seat Module

If the power seat module is replaced in service, the replacement module must be calibrated using the Land Rover approved diagnostic equipment. The calibration routine is necessary for the power seat module to reset the seat datum values.

FRONT SEAT HEATING







Depending on vehicle specification, seat heating is available for both the manually operated and the power operated seats. A heating element is incorporated within each seat cushion and squab. A seat heating module and electrical wiring is located beneath each front seat.

The seat heating modules are connected on the LIN bus to the ATC, and are also hardwired to the AJB for the power supply. A ground terminal from each seat heating module completes the circuit.

LUMBAR SUPPORT







Depending on the vehicle specification, the driver's seat only may incorporate a manually operated or a power operated lumbar support system.

Manually Operated Lumbar Support

The manual adjust lumbar support system is operated by a hand-wheel located on the side of the backrest. The handwheel is connected with a cable to a flexible plate mounted behind the backrest squab. As the hand-wheel rotates, the plate is distorted and is forced to bow toward or away from the seat squab. The manual adjust system provides a high level of control over the increase in lumbar support.

Power Operated Lumbar Support

The power operated lumbar support system features a single motor driven pump and air cells. The air cells are mounted behind the seat squab. The lumbar motor is controlled using the lumbar switch mounted to the seat frame. Operation of the lumbar switch will energize the lumbar motor, and drive the pump to inflate or deflate the air cells.

Power for the lumbar motor is supplied and controlled by the CJB, via a battery-saver timer relay to the lumbar control switch. The lumbar control switch directs the voltage via a hardwired connection to the lumbar motor.

Lumbar position is not stored within the power seat module.

REAR SEAT







The rear seat is a 60/40 split configuration, and is designed to fold in order to increase luggage capacity. Removal of the rear seat head rests will allow the seat to fold completely flat to the floor.

The rear seat is manufactured from 2 high strength steel extrusions that are joined at each end with a high strength steel bracket and pivot. The rear seat base is formed with an anti-submarine shelf that will retain the rear occupants in the seat during a front end collision.

The seat base and backrest are inlayed with formed sections of dual hardness molded foam that form the seat squab and cushion. The seats provide excellent support and comfort for the rear occupants.

An injection molded armrest with stowage tray is mounted in the center of the backrest, and may be folded down from the rear seat when the center position is not occupied.

ISOFIX fastening points are manufactured on the rear seat frame and are provided for secure fastening of compatible child safety seats to the 2 outer seat positions. The ISOFIX fastenings provide the safest method of child safety seat restraint, as the child safety seat is not able to roll or become detached from the rear seat, even during severe vehicle maneuvers.

CONTROL DIAGRAM - FRONT POWER OPERATED NON-MEMORY SEATS (SHEET 1 OF 3)

NOTE: A = Hardwired; N = Medium speed Controller Area Network (CAN) bus; O = LIN bus.







CONTROL DIAGRAM - DRIVER'S POWER OPERATED MEMORY SEAT (SHEET 2 OF 3)

NOTE: A = Hardwired; N = Medium speed CAN bus; O = LIN bus.







CONTROL DIAGRAM - FRONT SEAT HEATING (SHEET 3 OF 3)

NOTE: A = Hardwired; N = Medium speed CAN bus; O = LIN bus.