Volvo S90 TWIN ENGINE, Owner'S Manual

Page: 270 / 662

DRIVER SUPPORT
* Option/accessory. 268
Electronic stability control
Electronic Stability Control (ESC
2
) helps the
driver to avoid skidding and improves the car's
traction.
The driver display shows this
symbol when the ESC system
is engaged.
Braking from the ESC system
may be heard as a pulsing
sound, and the car may accel-
erate more slowly than expected when applying
the throttle.
The ESC system consists of the following sub-
functions:
• Stability function 3
•
Spin control and traction control system
•
Engine Drag Control
•
Trailer stability assist
WARNING
•
The stability system ESC is supplemen-
tary driver support intended to facilitate
driving and make it safer – it cannot han-
dle all situations in all traffic, weather and
road conditions.
•
ESC is not a substitute for the driver's
attention and judgement. The driver is
always responsible for ensuring the car is
driven in a safe manner, at the appropri-
ate speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.
Stability function
3
The function checks the driving and brake force
of the wheels individually in order to stabilise the
car.
Spin control and traction control system
The function is active at low speed and brakes
the drive wheels that spin so that additional trac-
tion shall be transferred from the drive wheels
that are not spinning.
The function also prevents the driving wheels
from spinning against the road surface during
acceleration.
Engine Drag Control
Engine Drag Control (EDC
4
) prevents involuntary
wheel locking, e.g. after shifting down or engine
braking when driving 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.
Trailer stability assist
* 5
Trailer stability assist (TSA
6
) stabilises a car tow-
ing a trailer in situations where they begin snak-
ing. Also see section "Trailer stability assist" for
more information.
NOTE
The TSA function is deactivated if ESC Sport
Mode is activated.
Related information
•
Sport mode for electronic stability control
(p. 269)
•
Activating/deactivating Sport mode in Elec-
tronic Stability Control (p. 269)
2
Electronic Stability Control
3 Also known as Active Yaw Control.
4 Engine Drag Control
5
Trailer stability assist is included when the Volvo genuine towbar is installed.
6 Trailer Stability Assist