LR3/Disco 3
GENERAL
NOTE:
The dynamic suspension system is a four corner air suspension system which is fitted to higher specification vehicles in
place of the conventional damper and coil spring suspension used on non-air suspension models.
The dynamic suspension system is electronically controlled by an air suspension control module which controls the air
supply unit, reacts to inputs from four height sensors and distributes air around the system via valve blocks.
The main air suspension system components are:
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Air suspension control module
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Air supply unit
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Four height sensors
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Three valve block assemblies
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Reservoir
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Air harness
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Four suspension air spring damper modules.
The four corner air suspension system maintains the vehicle height under all operating conditions by controlling the mass
of air in the air springs. The air suspension control module uses signals from the four height sensors to maintain the
correct suspension height. This is achieved by operating pneumatic control valves to increase or decrease the mass of air
in the air spring damper modules.
The air suspension system has three driver selectable, pre-determined ride heights. A driver interface indicates the
selected ride height and direction of movement. Additional information is also relayed to the driver via the instrument
cluster message center (where fitted) and by audible warnings also transmitted by the instrument cluster.
Height changes can only be made when the engine is running and the driver's and passenger doors are closed.
Access height can be selected with the engine not running, within 40 seconds of moving the ignition switch to the off
position provided the driver's door has not been opened in this time.
5
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Rear RH height sensor
6
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Rear RH air spring damper module
7
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Air supply unit silencer
8
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Rear LH air spring damper module
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Air filter
10
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Rear valve block
11
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Rear LH height sensor
12
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Upper acoustic cover
13
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Lower acoustic cover
14
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Air supply unit
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Reservoir valve block
16
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Air reservoir
17
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Front LH height sensor
18
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Front LH air spring damper module
19
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Front valve block
This section covers the air suspension control system.
Front suspension is detailed in a separate section. For additional information, refer to Front Suspension (204-01
Front Suspension, Description and Operation).
Rear suspension is detailed in a separate section. For additional information, refer to Rear Suspension (204-02
Rear Suspension, Description and Operation).
Terrain Response™ is detailed in a separate section. For additional information, refer to Ride and Handling
Optimization (204-06 Ride and Handling Optimization, Diagnosis and Testing).
