Volvo S60 - Manual (Page 149)

04 Comfort and driving pleasure
Stability system
04
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* Option/accessory, for more information, see Introduction. 149
Introduction
The Dynamic Stability and Traction Control
system (DSTC) consists of a number of func-
tions designed help reduce wheel spin, coun-
teract skidding, and to generally help improve
directional stability.
CAUTION
A pulsating sound will be audible when the
system is actively operating and is normal.
Traction control (TC)
This function is designed to help reduce wheel
spin by transferring power from a drive wheel
that begins to lose traction to the wheel on the
opposite side of the vehicle (on the same axle).
TC is most active at low speeds.
This is one of DSTC's permanent functions and
cannot be switched off.
Active Yaw Control (AYC)
This function helps maintain directional stabil-
ity, for example when cornering, by braking
one or more of the wheels if the vehicle shows
a tendency to skid or slide laterally.
This is one of DSTC's permanent functions and
cannot be switched off.
Spin control (SC)
The spin control function is designed to help
prevent the drive wheels from spinning while
the vehicle is accelerating.
Corner Traction Control – CTC
CTC compensates for understeering and helps
provide additional stability when accelerating
through a curve by preventing the inside wheel
from spinning. This is particularly useful when
accelerating on a curving highway on-ramp.
CTC is most effective if the stability system's
Sport mode is selected. See the section about
Sport mode.
Engine Drag Control (EDC)
EDC helps keep the engine running if the
wheels show a tendency to lock, e.g., when
shifting down in the Geartronic manual shifting
mode or while using the engine's braking func-
tion on a slippery surface. If the engine were to
stop, power steering would not function, mak-
ing the vehicle more difficult to steer.
Trailer Stability Assist – TSA*
Trailer Stability Assist helps stabilize a vehicle
that is towing a trailer when the vehicle and
trailer have begun to sway. See page 263 for
more information.
This system is automatically deactivated if the
driver selects Sport mode.
Operation
Sport mode
The stability system is always activated and
cannot be switched off.
However, the driver can select Sport mode,
which offers more active driving characteris-
tics. In this mode, the engine management sys-
tem monitors movement of the accelerator
pedal and steering wheel for sportier driving by
allowing more lateral movement of the rear
wheels before DSTC is activated.
Under certain circumstances, such as when
driving with snow chains, or driving in deep
snow or loose sand, it may be advisable to
temporarily use Sport mode for maximum
tractive force.
If the driver releases pressure on the acceler-
ator pedal, DSTC will also activate to help sta-
bilize the vehicle.
To switch to Sport mode:
1. Press the My Car button in the center con-
sole control panel and select
My S60
DSTC in the menu.
2. Unselect the symbol and leave the menu
by pressing EXIT.
> This puts DSTC in Sport mode.
Sport mode remains active until the driver
switches it off in the menu or until the engine is