Subaru WRX & WRX STI Manuals 2017 WRX & WRX STI Owner’s Manual | Page 414

Starting and operating/Vehicle Dynamics Control system

of the Vehicle Dynamics Control system is reduced and
this should be taken into account when driving the vehicle in such a condition.
. If non-matching tires are used,
the Vehicle Dynamics Control
system may not operate correctly.
. The Vehicle Dynamics Control
system helps prevent unstable
vehicle motion such as skidding
using control of the brakes and
engine power. Do not turn off the
Vehicle Dynamics Control system unless it is absolutely necessary. If you must turn off the
Vehicle Dynamics Control system, drive very carefully according to the road surface condition.

. Traction Control Function
The traction control function is designed to
prevent spinning of the driving wheels on
slippery road surfaces, thereby helping to
maintain traction and directional control.
Activation of this function is shown by
flashing the Vehicle Dynamics Control
operation indicator light.
. Skid Suppression Function
The skid suppression function is designed
to help maintain directional stability by
suppressing the wheels’ tendency to slide
sideways during steering operations. Activation of this function is shown by flashing
of the Vehicle Dynamics Control operation
indicator light.

In the event of wheelspin and/or skidding
on a slippery road surface and/or during
cornering and/or an evasive maneuver,
the Vehicle Dynamics Control system
adjusts the engine’s output and the
wheels’ respective braking forces to help
maintain traction and directional control.
Vehicle Dynamics Control operation indicator light

7-39

NOTE
. The Vehicle Dynamics Control system may be considered normal when
the following conditions occur.
– Slight twitching of the brake
pedal is felt.
– The vehicle or steering wheel
shakes to a small degree.
– An operating sound from the
engine compartment is heard
briefly when starting the engine
and when driving off after starting
the engine.
– The brake pedal seems to jolt
when driving off after starting the
engine.
. In the circumstances shown in the
following list, the vehicle may be less
stable than it feels to the driver. The
Vehicle Dynamics Control System may
therefore operate. Such operation does
not indicate a system malfunction.
– on gravel-covered or rutted
roads
– on unfinished roads
– when the vehicle is fitted with
snow tires or winter tires
. Activation of the Vehicle Dynamics
Control system will cause operation of
the steering wheel to feel slightly
different compared to that for normal
conditions.
– CONTINUED –