Special air suspension modes (Discovery 3)

Control functions when opening doors

If one or more doors are opened during a change in vehicle height when the vehicle is stationary, the air suspension control unit limits further height changes. A door open signal is transmitted from the CJB to the air suspension control unit via the high speed CAN bus. This allows the vehicle to remain level at a preset height so that loading conditions can be changed.

In addition, a door status signal is transmitted from the CJB to the air suspension control module via a permanent wire connection. This signal provides information about the door status when the high speed CAN bus is switched off, such as during periodic levelling.

The corresponding mode lamp on the air suspension switch will light and the height increase or decrease lamp will flash.

If all doors are closed within 90 seconds, the height change will resume. If 90 seconds have passed and all doors have not been closed, the height change will be stopped. The mode lamps corresponding to the selected height and the set height will light. The height change can be initiated again using the switch, however, if the vehicle is moving at a speed of more than 8 km/h, the control unit will continue to raise or lower the vehicle to the set height.

Advanced mode

If the car sits on its bottom and the traction control system is activated, the air suspension control unit automatically increases the mass of air supplied to the elastic pneumatic elements to lift the car over the obstacle. The extended mode is activated automatically; it is not possible to select it manually.

When the air suspension control unit switches to the advanced mode, the off-road mode lamp flashes if the vehicle height is higher than the off-road mode height. The off-road and on-road mode lamps flash if the suspension is between the off-road mode height and the on-road mode height. The on-road and on-road mode lamps flash if the suspension is between the on-road mode height and the on-road mode height. In addition, a message is displayed on the message center display.

To exit the advanced mode, briefly press the air suspension switch up or down, or drive at a speed greater than 3 km/h for 45 seconds.

(The article was copied from a resource: «www.LRman.ru»)

Additional lift in advanced mode

This feature has been added to new models to further increase ground clearance in Extended Mode. When Extended Mode is engaged and automatic vehicle height raising is complete, the driver can raise the vehicle further. This can be particularly useful when Extended Mode is engaged when driving on soft ground.

Additional lifting is possible after the height increase lamp goes out. Press and hold the switch in the upper position for 3 seconds while pressing the brake pedal. An audible signal from the instrument cluster confirms receipt of the request. The lifting symbol lights up while the vehicle is being raised.

Working in the presence of obstacles that prevent changing the suspension height

If the air suspension control unit detects that an obstacle prevents the suspension from changing height, it stops all suspension movement. This can be caused by jacking up the vehicle, attempting to lower the vehicle onto an object, or an obstacle limiting the vehicle's lift.

The air suspension switch lamps operate as in the advanced mode and the same message is displayed in the message center display. To reactivate the air suspension system, briefly move the air suspension switch up or down, or drive at a speed greater than 3 km/h for 45 seconds.

High speed driving mode

New models have a high-speed driving mode. The high-speed driving mode is activated only automatically. In this mode, the car is lowered by 20 mm to improve control. This function works completely automatically and is "invisible" to the driver.

If the vehicle speed exceeds 160 km/h for more than 5 seconds, the air suspension control unit switches to high-speed driving mode. The suspension returns to the road driving height when the vehicle speed is less than 130 km/h for more than 30 seconds. This function does not work if a trailer is attached to the towbar.

Periodic alignment

When the vehicle is parked, the air suspension control unit is activated two hours after the ignition is switched off, and then every six hours. The vehicle height is checked and if it is not within the specified range, small downward adjustments may be made automatically.

Vehicle transportation mode

The vehicle's towing mode is factory-set. In this mode, the suspension is locked for safe towing. Towing mode can be switched on and off using Land Rover approved diagnostic equipment.

When the ignition is switched off, the car will lower itself onto the compression buffers. This prevents the fastening bands from loosening in the event of air leakage from the elastic pneumatic elements.

When the engine is turned on, the compressor unit starts working and lifts the car so that it can be unloaded. When the ignition is turned off, the car will again lower itself onto the compression buffers. When the upper position of the transport mode is reached, the instrument panel gives an audible signal.