Land Rover Discovery Series Ii 04my Owners Handbook Nas Rover

Transfer Gearbox
130
WARNING
DO NOT drive the vehicle at speeds in excess 
of 40 mph (60 km/h) with the differential 
locked.Driving with the differential locked at 
speeds above 40 mph (60 km/h) may, under 
certain situations affect the brake 
performance under ABS conditions.
NOTE: For a valuable introduction to off-road 
driving, which includes many useful references 
to the transfer gearbox and diff lock , see 
‘BASIC OFF-ROAD TECHNIQUES’, page 158.
IMPORTANT INFORMATION
If the vehicle is driven on...

Cruise Control
131
C ru is e C ontro lCRUISE CONTROL
Cruise control enables the driver to maintain a 
constant road speed without using the 
accelerator pedal. This is particularly useful for 
freeway cruising or for any journey where a 
constant speed can be maintained for a lengthy 
period.
The cruise control system has three switches; a 
master switch on the right hand side of the 
instrument panel and two control switches 
marked ‘SET +’ and ‘RES’ mounted on the 
steering wheel.
WARNING
DO NOT use...

Cruise Control
132
To reduce the cruising speed: 
Press the ‘RES’ switch to slow the vehicle, until 
the required speed has been reached. Then 
press the ‘SET +’ switch to establish the new 
cruising speed (remember that cruise control 
will not operate at speeds below 28 mph 
(45 km/h).
To increase the set cruising speed:
Press and hold the ‘SET +’ switch - the vehicle 
will accelerate automatically. Release the 
switch as soon as the desired speed has been 
reached.
Alternatively, the set speed can be...

Brakes
133
B ra kesFOOT BRAKE
For your safety, the hydraulic braking system 
operates through dual circuits. If one circuit 
should fail, the other will continue to function. 
However, in the event of brake failure where 
only one circuit is operational, the vehicle 
should only be driven at slow speed to the 
nearest qualified retailer. In these 
circumstances, exercise extreme caution and 
be aware that increased brake pedal travel, 
greater pedal pressure, and longer stopping 
distances will be...

Brakes
134
WARNING
If the brake warning light should illuminate 
while the vehicle is in motion, bring the 
vehicle to a halt as quickly as traffic 
conditions and safety permit and seek 
qualified assistance before continuing. 
DO NOT pump the brake pedal - the braking 
system may lose any remaining power 
assistance available.
PARKING BRAKE 
Unlike most other vehicles, the handbrake 
operates on the rear propeller shaft, and NOT 
on the road wheels. This may result in slight 
movement of the vehicle...

Brakes
135
The purpose of the anti-lock braking system 
(ABS) is to allow efficient braking without wheel 
locking - thereby allowing the driver to retain 
steering control of the vehicle whilst braking.
Under normal braking conditions, (where 
sufficient road surface friction exists to reliably 
bring the vehicle to a halt without the wheels 
locking), ABS will not be activated. However, 
should the braking force exceed the available 
adhesion between the tires and the road 
surface, then ABS will...

Brakes
136
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 - remember, in 
normal circumstances, anti-lock braking 
operates only AFTER one or more roadwheels 
has reached the limit of its grip. It cannot 
reliably compensate for driver error or 
inexperience on difficult off-road surfaces.
Note the following:
•Under ABS control, heavy braking on a dry...

Traction Control
137
T ra ctio n C ontro lELECTRONIC TRACTION CONTROL
The purpose of electronic traction control is to 
maintain forward or rearward momentum of the 
vehicle when one or more wheels are spinning 
while others have good grip, e.g. 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...

Hill Descent Control
138
Hill Des cen t C ontrolHILL 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 the transfer 
gearbox is in low range, gears are engaged with 
the vehicle travelling at less than 31 mph (50 
km/h).
Press the switch (illustrated above) to...

Hill Descent Control
139
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 (e.g. the angle of the descent levels 
out significantly), fade-out may be achieved 
deliberately by deselecting HDC while the 
system is...