Brake Assist System - Volvo XC90 Owner's Manual

When Auto-hold is off, Hill Start Assist (HSA) will
be activated to help prevent the vehicle from roll-
ing backwards when starting up a hill.
Instrument panel symbol
Symbol Explanation
The symbol in the instrument
panel illuminates when this func-
tion is using the normal brakes to
keep the vehicle stationary.
This symbol in the instrument
panel illuminates when Auto-hold
is using the parking brake to keep
A
the vehicle stationary
B
A US models
B Canadian models
Related information
•
Hill Start Assist (p. 335)
•
Brake functions (p. 332)

Brake assist system

The Brake Assist System (BAS) increases brak-
ing force, thereby helping reduce braking dis-
tance.
The system monitors the driver's braking habits
and increases braking force when necessary.
Brake force can be increased up to the point at
which the ABS system is activated. The function
is deactivated when pressure on the brake pedal
decreases.
NOTE
•
When BAS is activated, the brake pedal
will go down farther than usual. Depress
the pedal as long as necessary.
•
Braking will stop when the pedal is
released.
Related information
•
Brakes (p. 330)
STARTING AND DRIVING
Braking effect after a collision
In the event of a collision in which the airbags or
seat belt pretensioners deploy or if a collision
with an animal is detected, the vehicle's brakes
are applied to help prevent or mitigate a secon-
dary collision.
Maintaining control of the vehicle after a collision
may be difficult. To help avoid or mitigate the
effect of a secondary collision, the brakes are
applied automatically to help bring the vehicle to
a stop.
The brake lights and hazard warning flashers will
be activated and the flashers will remain on after
the vehicle has come to a standstill. The parking
brake will then be applied automatically.
In a situation where stopping the vehicle may not
be desirable, the driver can override this system
by pressing the accelerator pedal.
This feature can only function if the brake system
is intact after the collision.
Related information
•
Brake functions (p. 332)
•
Airbag system (p. 83)
•
Rear Collision Warning (RCW) (p. 277)
333