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07 Driver support
07
* Option/accessory, for more information, see Introduction.
183
Electronic stability control (ESC) -
general
Stability system ESC (Electronic Stability
Control) helps the driver to avoid skidding and
improves the car's traction.
The activation of the ESC system
during braking may be noticed as a
throbbing sound. The car may
accelerate slower than expected
when the accelerator 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 appli-
cable road traffic rules and regulations are
followed.
The ESC system consists of the following
functions:
•
Active Yaw Control
•
Spin Control
•
Traction control system
•
Engine drag control - EDC
•
Corner Traction Control - CTC
•
Driver Steering Recommendation – DSR
•
Trailer Stability Assist* - TSA
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 reduces engine power if the
drive wheels slip against the underlying sur-
face in order to maintain stability and traction.
Traction control system
The function is active at low speed and trans-
fers power from the driving wheel that is spin-
ning to the one that is not.
Engine drag control - EDC
EDC (Engine Drag Control) prevents involun-
tary wheel locking, e.g. after shifting down or
engine braking when driving in low gears on
slippery road surfaces.
Involuntary wheel locking while driving can,
amongst other things, impair the driver's abil-
ity to steer the car.
Corner Traction Control - CTC
CTC (Corner Traction Control) compensates
for understeer and allows higher than normal
acceleration in a bend without wheelspin on
the inner wheel, e.g. on an arcing motorway
entrance road to quickly reach the prevailing
traffic speed.
Driver Steering Recommendation – DSR
DSR (Driver Steering Recommendation) helps
the driver steer the car in the right direction
when there is reduced traction or when the
ABS system engages.
The primary role of the DSR function is to
help the driver steer in the right direction
when the car is skidding.
DSR engages by applying slight torque to the
steering wheel in the direction in which the
car should be steered to maintain/achieve
maximum possible traction and stabilise the
car.
Trailer Stability Assist* - TSA
1
Trailer stability assist (p. 308) function is to
stabilise the car and trailer combination if it
begins to snake. For more information, see
Driving with a trailer (p. 301).
NOTE
The function is deactivated if the driver
selects Sport mode.
Related information
•
Electronic stability control (ESC) - opera-
tion (p. 184)
•
Electronic stability control (ESC) - sym-
bols and messages (p. 185)
1
Trailer Stability Assist is included in the installation of the Volvo genuine towbar.
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