Description & Operation (page 4 of 26)

 

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

 -

Cross link valve

16

 -

Rear valve block

17

 -

Rear LH corner valve

18

 -

Rear LH air spring damper module

19

 -

Inlet air filter

20

 -

Pilot exhaust valve

21

 -

Exhaust

22

 -

Air silencer

23

 -

Pressure relief and exhaust valve

24

 -

Motor temperature sensor

25

 -

Electric motor

 

Vehicle height changes are prevented if the air suspension control module receives a 'Door Open' signal from the 
Central Junction Box (CJB).