LR3/Disco 3
OPERATING MODES
The driver can manually select, using the air suspension switch, one of four ride states:
l
ON-ROAD - this height is the normal operating height of the vehicle
l
OFF-ROAD - this height is higher than the on-road height and provides improved ground clearance, approach,
departure and breakover angles
l
ACCESS - this height is lower than the on-road height and makes entering and exiting the vehicle easier for the
occupants
l
CRAWL (Locked at access) - this height allows the vehicle to be driven at the access height at low speeds to
provide increased roof clearance in low car parks etc.
NOTE:
An additional 'TRANSPORTATION' mode is also available but is only selectable using T4.
An additional function allows the vehicle to be raised or lowered from outside of the vehicle when the vehicle is stationary.
This assists with the attachment of a trailer and is achieved using the buttons on the remote handset and the ignition
switch in the off position. The remote handset can be programmed to perform a number of additional functions. For
additional information, refer to
Handles, Locks, Latches and Entry Systems
(501 -14 Handles, Locks, Latches and Entry
Systems)
If the air suspension control module senses that the vehicle has grounded and lost traction, the control module can
temporarily increase and/or redistribute the volume of air supplied to the affected air spring(s) to maximise the available
traction. This is known as extended mode and will be indicated to the driver by the lamps on the air suspension switch
flashing.
If the air suspension control module senses that the vehicle is prevented from moving upwards or downwards during a
height change or levelling correction, the control module will adopt a safe state and further height changes will be
suspended.
If a fault is detected by the air suspension control module, the control module will reduce the system functionality
dependent on the type and severity of the fault. The control module will also store a fault code which can be retrieved
using T4. If a severe fault occurs, the control module will attempt to put the vehicle in a safe condition. A fault is relayed to
the driver by the illumination of the air suspension warning indicator, the instrument cluster message center and an
audible warning emitted from the instrument cluster.
If the detected fault is minor and does not affect vehicle safety, the air suspension warning indicator in the instrument
cluster will illuminate in an amber colour and the fault should be rectified at the earliest opportunity. If a more severe fault
is detected above 31 mph (50 km/h) vehicle speed, the warning indicator will illuminate in a red colour and the vehicle
should be driven with care until the fault is rectified. An audible warning is emitted by the instrument cluster sounder when
14
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Rear RH air spring damper module
15
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Cross link valve
16
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Rear valve block
17
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Rear LH corner valve
18
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Rear LH air spring damper module
19
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Inlet air filter
20
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Pilot exhaust valve
21
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Exhaust
22
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Air silencer
23
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Pressure relief and exhaust valve
24
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Motor temperature sensor
25
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Electric motor
Vehicle height changes are prevented if the air suspension control module receives a 'Door Open' signal from the
Central Junction Box (CJB).
