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SAFETY 257
Dynamic Steering Torque (DST)
DST is a feature of the Electronic Stability
Control (ESC) and Electric Power Steering (EPS)
modules that provides torque at the steering
wheel for certain driving conditions in which the
ESC module is detecting vehicle instability. The
torque that the steering wheel receives is only
meant to help the driver realize optimal steering
behavior in order to reach/maintain vehicle
stability. The only notification the driver receives
that the feature is active is the torque applied to
the steering wheel.
NOTE:
The DST feature is only meant to help the driver
realize the correct course of action through
small torques on the steering wheel, which
means the effectiveness of the DST feature is
highly dependent on the driver’s sensitivity and
overall reaction to the applied torque. It is very
important to realize that this feature will not
steer the vehicle, meaning the driver is still
responsible for steering the vehicle.
Electronic Brake Force Distribution (EBD)
EBD function manages the distribution of the
braking torque between the front and rear axles
by limiting braking pressure to the rear axle.
This is done to prevent overslip of the rear
wheels to avoid vehicle instability, and to
prevent the rear axle from entering ABS before
the front axle.
Electronic Roll Mitigation (ERM)
ERM anticipates the potential for wheel lift by
monitoring the driver’s steering wheel input and
the speed of the vehicle. When ERM determines
that the rate of change of the steering wheel
angle and vehicle’s speed are sufficient to
potentially cause wheel lift, it then applies the
appropriate brake and may also reduce engine
power to lessen the chance that wheel lift will
occur. ERM can only reduce the chance of
wheel lift occurring during severe or evasive
driving maneuvers; it cannot prevent wheel lift
due to other factors, such as road conditions,
leaving the roadway, or striking objects or other
vehicles.
NOTE:
ERM is disabled anytime the ESC is in “Full Off”
mode (if equipped). See Ú page 257 for a
complete explanation of the available ESC
modes.
Electronic Stability Control (ESC)
ESC enhances directional control and stability
of the vehicle under various driving conditions.
ESC corrects for oversteering or understeering
of the vehicle by applying the brake of the
appropriate wheel(s) to counteract the above
conditions. Engine power may also be reduced
to help the vehicle maintain the desired path.
Oversteer — when the vehicle is turning more
than appropriate for the steering wheel posi-
tion.
Understeer — when the vehicle is turning less
than appropriate for the steering wheel posi-
tion.
WARNING!
Many factors, such as vehicle loading, road
conditions and driving conditions, influence
the chance that wheel lift or rollover may
occur. ERM cannot prevent all wheel lift or roll
overs, especially those that involve leaving the
roadway or striking objects or other vehicles.
The capabilities of an ERM-equipped vehicle
must never be exploited in a reckless or
dangerous manner which could jeopardize the
user's safety or the safety of others.
6
21_WK_OM_EN_USC_t.book Page 257
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