Seating: Adjustments Land Rover Discovery IV

Height adjustment (drivers seat only)

Pumping the handle controls seat height. Pumping the lever upwards raises the seat; downwards lowers the seat.

Recline adjustment

The angle of the backrest is adjusted by turning the rotary wheel either clockwise or anticlockwise.

Forward/backward adjustment

Lifting the tomel bar at the front of the seat and sliding the seat to the desired position achieves the forwards/backwards adjustment.

Lumber support adjustment

A hand wheel in the side of the seat provides for adjustment of lumbar support.

Folding armrest adjustment (if fitted)

Some vehicles are fitted with adjustable front seat armrests. These are used in the horizontal position or can be stowed vertically alongside the seat back rest. The horizontal position can be adjusted for height by turning the knob set into the end of the armrest.

Push and hold the switch forwards or backwards to move the seat to the desired position.

Seat back adjustment

Twist the switch forwards or backwards until the desired seat back angle is achieved.

Seat cushion height adjustment

Push the switch up or down to raise or lower the cushion.

Scheme 1

Note. On vehicles from 2008MY, the passenger seat can also be fitted with 8-way electrical adjustment.

The seat motors are a permanent magnet motor type coupled to a rack and pinion assembly. Should the motor seize or stick an internal thermal cut-out switch will trip to remove voltage from the motor. Two pins within each of the seat switch packs control the seat motors. Both pins are normally earthed. Operating the switch applies voltage to one of the pins while the other pin remains earthed. Operating the switch in the opposite direction reverses power and earth to the motor allowing the motor to run in the opposite direction.

Lumbar Adjustment - Vehicles From 2008MY

On vehicles from 2008MY the electric front seats are fitted with electric lumbar adjustment. The lumbar pump inflates a bladder in the backrest which provides extra support for the seat occupant.

Lumbar Adjustment Switch Location

Adjustment is achieved by operation of a rocker switch located on the outside of the seat, on the upper face of the side cushion trim. The switch is connected to an air pump, which inflates a lumbar bladder to provide the required lumbar adjustment. The air pump will operate for as long as the switch is operated in the inflate position. When the switch is operated in the deflate position, the switch operates a deflate solenoid to allow the air to escape from the bladder. The lumbar bladder is protected from over inflation by a pressure relief valve.

Immediate Adjustment

Pressing one of the manual adjustment switches will initiate the corresponding motor for that axis until the switch is released.

Only two seat motors can be driven at any one time. However, due to the sharing of relays, there are certain combinations of motors that cannot be driven together. The following table indicates which axis can and cannot be operated at the same time

If two axis are being driven and a third axis is requested to move, the third switch request is ignored until either of the two axis switches, already active, are released. The third axis movement may only be initiated providing the switch has been released and re-selected.

Seat adjustment can be initiated simultaneously with any mirror movement.

STEERING COLUMN ADJUST (where fitted)

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.

Scheme 2

To adjust the steering column

1. Turn the switch to the 'Column' or 'Auto' position
2. Move the switch forwards or backwards to adjust the reach
3. Move the switch up or down to adjust the rake.