LR3/Disco 3
Crawl mode allows the vehicle to driven at access height. The vehicle is locked in access height and can be selected at a
speed of less than 21.7 mph (35 km/h) and can be driven at low speeds to improve clearance in areas with restricted
headroom, i.e. car parks. If the vehicle exceeds 24.8 mph (40 km/h), crawl mode will be cancelled and the vehicle will
return to on-road height.
Crawl mode allows the vehicle to be driven at low speeds with the suspension locked at the access mode height. This
allows the vehicle to be driven in low car parks etc. with increased roof clearance.
Crawl mode can be selected up to 21.7 mph (35 km/h) with a long press of the switch in the down direction. The access
mode lamp and the crawl mode lamp will be illuminated. When the control module is in crawl mode, on -road mode height
will be selected automatically if the vehicle speed exceeds 25 mph (40 km/h). At 18.6 to 21.7 mph (30 to 35 km/h) a
message is displayed in the message center to warn the driver to slow down or the vehicle will raise. Crawl mode can
also be manually cancelled by moving the switch in the up direction for 1 second. The access mode lamp and the crawl
mode lamp will be extinguished.
Automatic Height Change Warnings
When the suspension is in off-road mode, access mode or crawl mode height, the air suspension control module will
change the suspension height automatically when the vehicle speed exceeds a predetermined threshold.
When the suspension is at off-road mode or crawl mode height, the control module issues a warning to advise the driver
that the vehicle is approaching the speed threshold. The instrument cluster sounder will emit a chime, a message will be
displayed in the message center and the on-road mode lamp and either the raising or lowering lamp will flash.
The off-road mode or crawl mode height speed warning is removed when the vehicle speed is reduced.
SPECIAL MODES
Door Open Functionality
If one or more of the vehicle doors are opened during a height change when the vehicle is stationary, the air suspension
control module will restrict further height change. The door open signal is transmitted by the CJB on the high speed CAN
bus and received by the air suspension control module. This keeps the vehicle level to the set height when a door opens
to allow for changes in loading conditions.
A hardwired door status signal is also transmitted from the CJB to the air suspension control module. This signal provides
door status information when the high speed CAN bus is off, i.e.; during periodic re-levelling.
The lamp on the air suspension switch for the target mode height will remain illuminated and the raising or lowering lamp
will flash.
If all of the doors are closed within 90 seconds, the height change will resume. If the 90 second period is exceeded and all
of the doors are not closed, the height change will be cancelled. The mode lamps showing the previously selected height
and the target height will be illuminated. The mode height change can be reselected by operating the switch, however, if
the vehicle is driven at speed of more than 5 mph (8 km/h) the control module will continue to raise or lower the vehicle to
the target mode height.
Extended Mode
If the vehicle becomes grounded and the traction control becomes operational, the air suspension control module
automatically increases the mass of air in the air springs to raise the vehicle clear of the obstruction. Extended mode is
activated automatically and cannot be selected manually.
When the air suspension control module has activated the extended mode, the off-road mode lamp will flash if the
suspension is above off-road mode height. The off-road mode and on-road mode lamps will flash if the suspension is
between off-road mode and on-road mode heights. The on -road mode and access mode lamps will flash if the
suspension is between on-road mode and access mode. A message will also be displayed in the message center.
To exit the extended mode, press the air suspension switch briefly in the up or down position or drive the vehicle at a
speed of more than 12.5 mph (20 km/h).
Suspension Prevented From Moving
