User Manual - Page 383

For 2017 XC90 T8 TWIN ENGINE PLUG-IN HYBRID.

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STARTING AND DRIVING
* Option/accessory, for more information, see Introduction.
381
When HDC and LSC are activated, this changes
the response from the accelerator pedal and
engine.
Activating HDC
This function can be activated in different ways,
depending on how the vehicle is equipped.
Using the drive mode control*
Select the Off Road drive mode to activate the
function.
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.
From the center display's Function view
Models without the drive mode
control have a button for
Hill
Descent Control in the center
display's Function view.
Tap the button to activate. A light in the but-
ton illuminates when the function is acti-
vated.
NOTE
The function is deactivated when driving at
higher speeds and must be reactivated at
lower speeds if so desired.
Related information
Brake functions (p. 378)
Low Speed Control (LSC) (p. 428)
Drive modes (p. 420)
Hill Start Assist
Hill Start Assist (HSA) helps prevent the vehicle
from rolling backwards when starting up a hill. If
you are backing up a hill, HSA helps prevent the
vehicle from rolling forward.
HSA makes it easier to start or back up on a hill
by retaining pressure on the brake pedal for sev-
eral seconds after the pedal has been released in
order to keep the vehicle at a standstill.
The brakes will be released after several seconds
or when the driver presses the accelerator pedal.
HSA is available even if the Auto-hold braking
function is turned off.
Related information
Brake functions (p. 378)
Auto-hold brake function (p. 379)
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