Emergency Brake Lights - Volvo XC 90 Owner's Manual

STARTING AND DRIVING

Emergency brake lights

The emergency brake lights activate in the event
of hard braking/rapid deceleration at most nor-
mal driving speeds or if the ABS system is acti-
vated. This function causes an additional taillight
on each side of the vehicle to illuminate to help
alert vehicles traveling behind.
Once the emergency brake lights have been acti-
vated, if the driver releases the brake pedal, the
brake lights will return to their normal function.
Related information
•
Brakes (p. 324)
•
Hazard warning flashers (p. 135)
•
Brake lights (p. 134)
328
Hill Descent Control (HDC)
HDC is a type of low-speed automatic engine
brake and makes it possible to increase or
decrease the vehicle's speed on steep downhill
gradients using only the accelerator pedal, with-
out applying the brakes. HDC is integrated into
Off Road
the drive mode.
HDC is particularly useful when driving down
steep hills with rough surfaces, and where the
road may have slippery patches.
WARNING
HDC does not function in all situations, and is
a supplementary braking aid. The driver has
full responsibility for driving in a safe manner.
Function
HDC allows the vehicle to roll forward or in
reverse at very low speed with enhanced engine
braking. However, speed can be adjusted with
the accelerator pedal. When the accelerator
pedal is released, the vehicle will return to very
low speed.
The driver can use the brakes to slow or stop the
vehicle at any time.
HDC is activated along with Low Speed Control
(LSC), which together make driving on slippery
surfaces at low speeds easier.
When HDC and LSC are activated, this changes
the response from the accelerator pedal and
engine.
Activating HDC
HDC only functions at low speeds.
Using the driving mode control*
Off Road
Select the driving mode to activate
HDC.
Select a different drive mode to turn HDC off. If
this is done while the vehicle is on a steep down-
grade, engine braking will decrease gradually.
NOTE
When LSC with HDC is activated by the
Road
drive mode, the feel of the accelerator
pedal and engine response will change.
The function is deactivated when driving at
higher speeds and must be reactivated at
lower speeds if so desired.
* Option/accessory, for more information, see Introduction.
Off