Land Rover Discovery Series Ii Owners Handbook Nas Rover

							Brakes
98 Additional operating information
While anti-lock braking is designed to operate
equally effectively in off-road driving
conditions, on certain surfaces total reliance
on the system may be unwise. Anti-lock
braking cannot reliably compensate for driver
error or inexperience on difficult off-road
surfaces.
Note the following:
· Under ABS control, heavy braking on a dry
road may produce tyre noise and slight
marking of the road surface. Neither need
cause concern.
· On soft or deep surfaces such as powdery
snow, sand or gravel, and on extremely
rough ground, braking distances with ABS
may be greater than those achievable with
a non-ABS system, even though improved
steering would be experienced. This is
because the natural action of locked
wheels on soft surfaces is to build up a
wedge of surface material in front of the
wheels, which assists in stopping.
· The driver should always take account of
the surface to be travelled over and the
fact that brake pedal reactions will be
different from those experienced on a
non-ABS vehicle.
· When maximum braking is required on
loose or bumpy surfaces, full braking
effort should be applied.· If the vehicle is stopped on a very steep
slope where little traction is available, it
may slide with the wheels locked because
there is no wheel rotation to signal
movement to the system. To counteract
this, briefly release the brakes to permit
some wheel movement, then re-apply the
brakes to allow the system to gain control
at a suitable speed.
· Before driving off-road, read and
thoroughly understand the Off-road
driving section of this handbook. 
						

							Brakes
99
Warning light
The anti-lock braking system
incorporates a monitoring
system, which checks that all the electrical
components are in working order, as soon as
the starter switch is turned on and also at
frequent intervals during your journey.
The warning light on the instrument panel is
an important part of this system. The light
should illuminate for approximately 3 seconds
when the starter switch is turned to position
II and then extinguish.
If the light illuminates while driving, or
remains illuminated for more than 3 seconds
after the starter switch is turned on, a fault
has been detected by the self monitoring
system and full ABS control may not be
available - consult your dealer at the earliest
opportunity.
In such circumstances, while the foundation
braking system remains fully operational, ABS
may not be available and driving techniques
appropriate to a non ABS vehicle should be
employed. 
						

							Traction control
100 ELECTRONIC TRACTION CONTROL
The purpose of electronic traction control is to
aid traction when one or more wheels are
spinning while others have good grip, eg. if
one wheel is on ice and others are on tarmac.
The system works by applying the brake to a
spinning wheel in order to transfer torque to
the remaining wheels.
NOTE:Traction control can operate up to
speeds of 62 mph (100 km/h).
Warning light
The instrument panel has a traction control
warning (TC) which illuminates for a
minimum of 2 seconds whenever the system
is active and also illuminates as a bulb check
(for approximately 3 seconds) when the
starter switch is turned to position II.
If there is a fault with the system, the warning
light will illuminate continuously and remain
illuminated when the vehicle is stopped, in
which case you should contact your dealer at
the earliest opportunity.
NOTE:Faults with the ETC system will
invariably cause the Hill Descent Control
warning light to illuminate too. In most cases
the ABS and brake system lights will also
illuminate. 
						

							Hill Descent Control
101
H2656
HILL DESCENT CONTROL
Hill Descent Control (HDC) operates in
conjunction with the anti-lock braking system
to provide greater control in off-road
situations particularly when descending
severe gradients.
To select HDC
HDC can be selected with the vehicle in any
gear, but will only operate when low range
gears are engaged with the vehicle travelling
at less than 31 mph (50 km/h).
Press the switch (illustrated above) to select
HDC.
If low range gears are engaged, the HDC
information light (GREEN) on the instrument
panel will illuminate (if low range gears have
NOT been selected, the light will flash and the
warning chime will sound continuously).
To deselect HDC, press the switch a second
time (the information light will extinguish and
a single warning sound will chime).Hill descent control in action
During a descent, if engine braking is
insufficient to control the vehicle speed, HDC
(if selected) automatically operates the brakes
to slow the vehicle and maintain a speed
relative to the selected gear and the
accelerator pedal position.
When driving off-road, HDC can be
permanently selected, to ensure that control is
maintained whenever low range gears are
engaged. ABS and traction control are still
fully operational and will assist if the need
arises.
NOTE:With HDC selected, gear changes can
be carried out in the normal way.
If the brake pedal is depressed when HDC is
active, HDC is overridden and the brakes will
perform as normal (a pulsation might be felt
through the brake pedal). If the brake pedal is
then released, HDC will recommence
operating if necessary.
In extreme circumstances, the HDC system
may cause brake temperatures to exceed their
pre-set limits. If this occurs, the HDC failure
warning light (AMBER) will start to flash and
the warning chime will sound continuously.
During this time HDC will function as normal. 
						

							Hill Descent Control
102 To avoid further cause for brake temperatures
to rise, engage an appropriate low gear for
steep descents and avoid descending hills at
higher than the minimum descent speed. If
the failure warning light continues to flash,
the HDC system will gradually fade out (see
HDC fade-out).
HDC fade-out
HDC fade-out gradually decreases the HDC
brake intervention with the effect that the rate
of hill descent will increase. If this occurs the
HDC information light will flash and the
warning chime will sound for the period that
HDC takes to fade. HDC will be disabled
completely once the descent is complete.
If required (eg. the angle of the descent levels
out significantly), fade-out may be achieved
deliberately by deselecting HDC while the
system is operating.
If a fault with the HDC system is detected, or if
the braking system reaches a pre-set
temperature due to extreme conditions, HDC
will automatically fade out.Warning lights
HDC information light - GREEN:
The light illuminates briefly as a
bulb and system check when the
starter switch is turned to position II and also
when HDC is selected.
If HDC is selected when the operating gears
(LOW range) are engaged, the light will
illuminate continuously.
If HDC has been selected but the systems
operating criteria are not met (i.e. gearbox still
in high range or vehicle speed too high), the
information light will flash and the warning
chime will sound continuously.
If the light flashes while HDC is active, normal
functionality may seize and HDC fade out
may be induced.
HDC failure light - AMBER:
The light illuminates briefly as a
bulb and system check when the
starter switch is turned to position II.
If the light illuminates at any other time, either
a fault has occurred which affects the
functionality of the system, or over-use of the
system has been detected, in which case HDC
may fade out.
NOTE:System faults which cause the failure
light to illuminate after the initial system
checks, or whilst driving, will be accompanied
by the warning chime sounding 3 times. 
						

							Active cornering enhancement
103
H2605
WARNING
If the warning light illuminates RED a
system fault has occurred that may result in
serious damage to vehicle components.
Stop the vehicle and switch off the engine as
soon as safety permits.
Active Cornering Enhancement
(if fitted)
Active Cornering Enhancement (ACE) is a
patented feature unique to Land Rover. The
system is designed to eliminate vehicle body
lean at low cornering speeds and reduce body
lean at higher cornering speeds, while
maintaining a soft, car-like, suspension for
straight line travelling. On uneven surfaces
and rough tracks, the ACE system will adjust
the suspension according to the vehicle speed
and roughness of the surface to provide
improved passenger comfort.
The ACE system automatically compensates in
off-road conditions to provide maximum
articulation and improved traction..
The system is entirely automatic in operation
and cannot be influenced by the driver in any
way. However, the functionality of the ACE
warning light in the instrument panel is very
important and drivers should be aware of the
following: 
						

							Active cornering enhancement
104 Warning light
The warning light illuminates RED when the
starter switch is turned on (to position II).
After two seconds, the RED illumination
changes to AMBER and, after a further two
seconds, the light extinguishes. This process
is a system check that takes place every time
the vehicle is used. Provided the ACE system
is operating correctly, illumination will not
occur at any other time.
If illumination occurs while driving, a fault
with the system is indicated, as follows:
If the light shows RED(a flashing red light,
which changes to constant illumination after
two minutes, and is accompanied by a
warning chime):
This indicates a system fault that may result in
serious damage to vehicle components and
reduced ACE performance. You must stop the
vehicle as soon as safety permits and switch
off the engine. DO NOT CONTINUE DRIVING!
Seek qualified assistance immediately.
If the light shows AMBER(constant
illumination):
This indicates a system fault that will result in
reduced ACE performance, but will not leave
the vehicle in a dangerous condition. You may
continue driving, but reduce speed, take
additional care, and consult a Land Rover
dealer at the earliest opportunity. 
						

							Self-levelling suspension
105 SELF-LEVELLING SUSPENSION
(if fitted)
When the engine is running, the self-levelling
suspension system (SLS) operates
automatically on the rear of the vehicle to
maintain a level or efficient vehicle height
regardless of vehicle load.
AUTOMATIC OPERATION
If the height of the vehicle is reduced by
additional loading (passengers occupying the
occasional rear seats or the attachment of a
trailer, for example), the SLS system
automatically increases air pressure to the
springs to compensate for the additional
weight or changed attitude of the vehicle.
Similarly, if loads are removed and the vehicle
height increases in consequence, the system
will reduce air pressure to bring the vehicle
back to a level attitude.
Extended mode
Off-road, if the vehicle becomes grounded and
traction control is induced, the SLS system
automatically pumps more air to the rear
springs to raise the body clear of the
obstruction, thereby enabling the vehicle to be
freed. This is known as Extended mode and
will cause the off-road warning light to flash.
Once forward motion is regained, the
suspension height will automatically return to
its previous setting and the warning light will
extinguish.MANUAL OPERATION
The SLS system can also be manually
controlled to either:
· Raise the rear of the vehicle by 40 mm
(approx.) to increase ground clearance
and improve the departure angle for
off-road driving. Note that this function
operates ONLY below a speed of 18 mph
(30 km/h) - above this speed, the vehicle
will automatically return to its standard
ride height.
· Lower the vehicle in order to ease loading,
or to enable various heights of trailer hitch
to be connected more easily. The SLS
system will assume automatic control -
adjusting the height of the vehicle 10
seconds after a road speed of 3 mph (5
km/h) is reached, or immediately once a
road speed of 7 mph (12 km/h) has been
achieved.
WARNING
DO NOT operate the off-road switch while
driving on the road, or when the suspension
has been manually lowered below standard
ride height - any sudden or unexpected
change to the vehicles height or attitude
could cause an inexperienced driver to lose
control, or disturb the load/weight
distribution within the vehicle.
DO NOT select off-road height while towing. 
						

							Self-levelling suspension
106
H2606
To manually raise the suspension:
With the engine running and all doors fully
closed, press the fascia-mounted off-road
mode switch (see illustration). A single
warning chime will sound, the off-road
warning light on the instrument panel will
commence flashing and the rear of the vehicle
will start to rise. Once the pre-set off-road
height has been reached, the warning light will
stop flashing and illuminate constantly
instead. Constant illumination will remain
while the vehicle is operating at off-road
height.
To return the vehicle to standard ride height,
press the off-road mode switch a second
time. Note that a single chime will sound and
the warning light will flash while the rear
suspension is lowered.
NOTE:If axle displacement is excessive,
selection of the off-road height setting may be
prohibited. In this case three warning chimes
will sound.
NOTE:If changes to or from off-road height
are prohibited (e.g. door open) the chime will
sound three times.
H2607
To manually lower the suspension:
To lower the suspension you will need a
remote suspension control (handset) - see
illustration.
With the vehicle stationary at standard ride
height, and the starter switch turned to
position II, press and hold the DOWN
button to lower the vehicle. Release the button
when the desired height has been reached.
The SLS warning light on the instrument
panel will flash and a warning chime will
sound continually while the vehicle is
lowering.
To return the vehicle to its standard ride
height, press and hold the UP button on the
handset. Again the warning light flashes (and
chime sounds) while the vehicle is rising. All
suspension movement and warning light
activity ceases once the vehicle has returned
to standard ride height.
NOTE:The SLS system will not operate while
a door is open.
NOTE:At high altitude the system will take
significantly longer to raise the vehicle. 
						

							Self-levelling suspension
107
NOTE:If this feature is subjected to excessive
use, the system will automatically disable to
prevent components from overheating. The
system has a cumulative total of three
minutes operation at any one time. If this is
exceeded the system will close down (partial
operation will return after a few minutes).
Remote SLS handset
The remote SLS handset is available as an
accessory from a Land Rover dealer.
Battery replacement is similar to the
equivalent process for the handset key. This is
described under
Locks & Alarmin the
Controls & Instrumentssection of the
handbook. Battery specification is identical.
IMPORTANT INFORMATION
Note that the handset will operate
effectively from inside the vehicle. It is
therefore important to keep it out of reach
of children at all times, and especially
while towing. When operating the
handset from inside the passenger
compartment for the purpose of lowering
the vehicle to attach a trailer, ensure that
the underside of the vehicle has been
checked for obstructions before lowering,
and that a responsible adult has been
posted outside the vehicle to supervise
the lowering process.Warning lights
Off-road- AMBER
Illuminates briefly as a bulb and system check
when the starter switch is turned to position
II and then extinguishes.
If the off-road switch is pressed:
The light flashes while the rear of the vehicle
is either; rising to off-road height, or returning
to standard ride height. The light then
illuminates constantly while the suspension
remains at off-road height.
In addition, the light will flash while Extended
mode is induced.
Self-levelling suspension- AMBER
Illuminates briefly as a bulb and system check
when the starter switch is turned to position
II and then extinguishes.
If the remote handset is operated:
The light flashes continually while the rear of
the vehicle is being lowered, or raised.
If the light illuminates constantly this indicates
a fault with the self-levelling suspension and
you should seek qualified assistance.