Stability And Traction Control System - Volvo S40 Owner's Manual

General
The Dynamic Stability and Traction Control
system (STC/DSTC) improves the car's trac-
tion and helps the driver to avoid skidding.
A pulsing sound may be noticed during brak-
ing or acceleration when the system is in
action. The car may accelerate more slowly
than expected.
The car is equipped with either STC or DSTC
depending on market. The table shows the
integral functions of the respective systems.
Function/system STC
Active Yaw Control
Spin Control X
Traction control system X
Active Yaw Control
The function limits 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 dur-
ing acceleration.
Traction control system
The function is active at low speed and trans-
fers power from the driving wheel that is
spinning to the one that is not.
DSTC
X
X
X
06 Starting and driving

Stability and traction control system

Reduced operation
The stability system is activated automati-
cally each time the car is started.
System operation during skidding and accel-
eration can be partially deactivated.
Operation during skidding is delayed and so
allows more skidding which provides greater
freedom for dynamic driving.
Traction in deep snow or sand is improved as
acceleration is no longer limited.
Operation
– Turn thumbwheel (A) until the STC/ DSTC
menu is shown.
06
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