Volvo XC90 TWIN ENGINE 2018 Owner's Manual page 442

STARTING AND DRIVING
Hill Descent Control
The function for assisting when driving downhill
12
(HDC ) is a low-speed function with increased
engine braking. The function makes it possible
to increase or decrease the vehicle's speed on
steep downhill gradients by only using the accel-
erator pedal, without applying the brakes.
The function is included in the
mode.
HDC is designed for driving on rough roads at
low speeds and downhill gradients with slippery
or otherwise difficult road surfaces. The driver
does not need to use the brake pedal but can
instead focus on steering.
WARNING
HDC is only intended to be a supplementary
braking aid and it does not function in all sit-
uations.
The driver is always ultimately responsible for
operating the vehicle in a safe manner.
Function
Hill Descent Control allows the vehicle to move
forward or backward at very low speeds assisted
by the brake system. The driver can increase the
speed by pressing the accelerator pedal. When
the accelerator pedal is released, the vehicle will
12 Hill Descent Control
Low Speed Control
13
440
return to very low speed regardless of how steep
the hill is and without the brakes needing to be
applied. The brake lights will illuminate when the
function is activated.
The driver can brake to stop or slow the vehicle
at any time by depressing the brake pedal.
HDC is activated along with Low Speed Control
Off Road
drive
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(LSC ), which facilitates and improves traction
and control on rough and slippery surfaces. The
system is intended to be used at low speeds, up
to approximately 40 km/h (25 mph).
To keep in mind when using HDC
• If the function is switched off while driving on
a steep downhill gradient, braking effect will
be gradually reduced.
HDC can be used in gear positions D and R,
•
and in manual gears 1 or 2.
• It is not possible to manually shift to third
gear or higher when HDC is active.
NOTE
When LSC with HDC is activated in the
Road
drive mode, the feel of the accelerator
pedal and engine response will change.
NOTE
This drive mode is not designed to be used
for normal street driving.
NOTE
The function is deactivated when driving at
high speeds and must be reactivated at lower
speeds if so desired.
Related information
• Activating and deactivating Hill Descent Con-
trol using the function button (p. 441)
• Changing drive mode (p. 433)
• Low Speed Control (p. 438)
• All Wheel Drive (AWD) (p. 426)
Off