Frelander 2. Manual — part 714

Terrain response

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This program should be selected once the need
for a special program has passed. Once the
special program has been deselected, all of the
vehicle systems will return to their normal
settings except HDC. HDC will remain active if
it was selected manually.

Grass-Gravel-Snow

This program should be used
where a firm surface is covered
with loose, or slippery material.

Surfaces covered in water, ice, slime, grass,
gravel, shale, pebbles, or a thin coating of sand
for example.

Note: For deep gravel it is recommended that
the Sand program is selected.

In slippery conditions, it may be beneficial to
pull away in a higher gear than usual.

For information on the fitment and use of snow
chains. See USING SNOW CHAINS
(page 192).

For information on the fitment and use of
winter tyres. See USING WINTER TYRES
(page 183).

Note: If the vehicle is unable to gain traction in
deep snow, switching DSC off may help. DSC
should be switched on again as soon as the
difficulty is overcome. See USING TRACTION
CONTROL (page 139).

Mud-Ruts

This program should be used for
crossing terrain that is muddy,
rutted, soft, or uneven.

Sand

This program should be used for
terrain which is predominantly soft
dry sand, or deep gravel.

Note: If the vehicle is unable to gain traction in
extremely soft, dry sand, switching DSC off
may help. DSC should be switched on again as
soon as the difficulty is overcome. See USING
TRACTION CONTROL (page 139).

If the sand to be crossed is damp/wet, and
sufficiently deep to cause the wheels to sink
into the surface, the Mud-Ruts program should
be used.

System difficulties

Note: Selection of an inappropriate special
program will not endanger the driver, nor will it
immediately damage the vehicle. However, if
continued, use of an incorrect program will
impair the vehicle's response to the terrain,
and can reduce the durability of the drive
systems.

If the system becomes partially inoperable for
any reason, it may not be possible to select
special programs. A warning will be given
when selection of a special program is
attempted. If the Terrain response system
becomes totally inoperable, all of the program
indicators will be switched off, and the
message centre will display the relevant
message.

If a participating vehicle system becomes
temporarily inoperable, the General program
will be automatically selected. Once the system
returns to normal operation, the previously
active program will be re-activated unless the
ignition has been turned off in the mean time.

Terrain response messages

Messages relating to the terrain response
system are displayed on the message centre.
See INFORMATION MESSAGES (page 99).

Most of the messages that appear will be for
information only, and require no driver
intervention, SAND PROGRAM SELECTED for
example.

135

Terrain response

R

Messages that require driver intervention are
shown in the following table.

Message

Meaning

What to do?

PROGRAM CHANGE IN

PROGRESS

Conditions exist which

temporarily prevent selection

of a new program.

If conditions change within 60

seconds, the chosen program

will be activated. If the

message is prompted by

electronic coupling overheat

the delay will be longer. A

separate message will also be

displayed.

SYSTEM FAULT SPECIAL

PROGRAMS NOT AVAILABLE

A fault exists which renders the

Terrain Response programs

unavailable.

Use extreme caution if

travelling off road, and seek

qualified assistance

immediately.

RECOMMEND COMMAND

SHIFT FOR DEEP SOFT SAND

In extreme sand conditions, it

may be beneficial to select

Command Shift to improve

driver control.

Select Command Shift if

required.

Hill descent control (HDC)

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Hill descent control (HDC)

PRINCIPLE OF OPERATION

HDC operates in conjunction with ABS to
provide greater control when off-road,
particularly when descending steep slopes.
HDC operation is fully automatic when
engaged.

During a hill descent when driving off-road,
engine braking is used to control the speed of
descent. If engine braking alone is insufficient
to control the vehicle's speed, HDC will slow
the vehicle using the braking system. HDC will
control the descent speed relative to the gear
selected and accelerator position.

If the vehicle is fitted with a manual
transmission, HDC should only be used in first,
or reverse gears. If the vehicle is fitted with an
automatic transmission, HDC should only be
used in D, R, or CommandShift 1. When in D
the vehicle will select the most appropriate
gear.

Note: HDC is automatically selected by some
of the Terrain response special programs.

Gradient release control (GRC)

With HDC activated, if the vehicle is stopped on
a slope using the footbrake, GRC will become
active. When the footbrake is released GRC will
automatically delay the brake release to allow
take up of drive, and build up of engine torque.
The brakes will then gradually release to allow
the vehicle to move smoothly away under the
control of HDC.

GRC operates in forward and reverse, and
requires no driver intervention.

Before driving off-road

Before venturing off-road it is absolutely
essential that inexperienced drivers become
fully familiar with the vehicle's controls. In
particular, CommandShift, Hill Descent Control
(HDC), and the Terrain Response system.

Basic information and off-road driving
techniques can be found in the off-road driving
handbook available on-line at
http://www.ownerinfo.landrover.com

Off-road driver training should be undertaken
by anyone intending to drive off-road. Training
is available at your nearest Land Rover
Experience centre. More details can be found at
http://www.landroverexperience.com

137

Hill descent control (HDC)

R

USING HDC

Selecting HDC

HDC can be selected at speeds below 80 km/h
(50 mph). To select HDC, press and release the
HDC on/off switch.

The green HDC indicator will
illuminate continuously at speeds
below 50 km/h (30 mph) to indicate

that HDC is fully active.

If the vehicle speed exceeds 80 km/h (50 mph)
HDC will disengage, and the HDC indicator will
extinguish.

If HDC has been selected, and the vehicle
speed rises above 50 km/h (30 mph) HDC is
suspended, and the HDC indicator will flash. A
message will appear in the message centre to
confirm the suspension of HDC.

HDC operation

With HDC engaged, the speed of descent can
be altered using the cruise control steering
wheel switches. + increases the speed, and —
decreases the speed.

To increase speed press, and hold, the + switch
until the desired speed is achieved. When the
switch is released, the speed will be
maintained.

To decrease speed press, and hold, the —
switch until the desired speed is achieved.
When the switch is released, the speed will be
maintained.

To increase or decrease speed gradually, tap
the + or — switch as required. Each tap of the
switch will increase, or decrease the speed in
increments of 0.5 km/h (0.3 mph). The
accelerator pedal can also be used to increase
speed, up to the threshold in each gear.

Note: Each gear has a pre-determined
minimum speed.

Descent speed will only increase on a slope
steep enough to provide additional
momentum. Therefore, use of the + switch on
a gentle slope may not increase the speed.

When using HDC in vehicles fitted with a
manual transmission, depressing the clutch
pedal will prevent HDC from controlling the
speed of descent.

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