Speed-Dependent Steering Force - Volvo XC 90 Owner's Manual

DRIVER SUPPORT

Speed-dependent steering force

Speed related power steering causes the steer-
ing wheel force to increase with the speed of the
car in order to give the driver enhanced sensitiv-
ity.
On motorways the steering feels firmer. When
parking and at low speed steering is light and
requires only a slight effort.
NOTE
In certain situations the power steering may
become too hot and then needs to be tempo-
rarily cooled - during this time the power
steering operates with reduced power and
turning the steering wheel may then be per-
ceived to be slightly heavier.
In parallel with the temporarily reduced steer-
ing assistance, the driver display shows a
message.
Change the steering force level*
To select the steering force level, go to the "Drive
modes" section and see the description at the
alternative INDIVIDUAL under the heading
"Selectable drive modes".
This setting is not accessible while the car is
moving.
Related information
•
Drive modes (p. 357)
254
Electronic stability control
Electronic stability control (Electronic Stability
Control — ESC) helps the driver to avoid skid-
ding and improves the car's traction.
The activation of the ESC sys-
tem during braking may be
noticed as a throbbing sound.
The car may accelerate slower
than expected when the accel-
erator pedal is depressed.
WARNING
The stability system ESC is supplementary
assistance - it cannot handle all situations in
all road conditions.
The driver always bears responsibility that the
vehicle is driven safely and that applicable
road traffic rules and regulations are followed.
The ESC system consists of the following func-
tions:
•
Active Yaw Control
•
Spin Control
•
Traction control system
•
Engine Drag Control
•
Trailer stability assist
Active Yaw Control
The function checks the driving and brake force
of the wheels individually in order to stabilise the
car.
Spin Control
The function prevents the driving wheels from
spinning against the road surface during acceler-
ation.
Traction control system
The function is active at low speed and transfers
power from the driving wheel that is spinning to
the one that is not.
Engine Drag Control
Engine Drag Control (Engine Drag Control —
EDC) prevents involuntary wheel locking, e.g.
after shifting down or engine braking when driv-
ing in low gear on slippery road surfaces.
Involuntary wheel locking while driving can,
amongst other things, impair the driver's ability to
steer the car.
* Option/accessory, for more information, see Introduction.