Driving Assist Systems - Lexus ES 250 Owner's Manual

Driving assist systems

To keep driving safety and perfor-
mance, the following systems oper-
ate automatically in response to
various driving situations. Be aware,
however, that these systems are
supplementary and should not be
relied upon too heavily when oper-
ating the vehicle.
Summary of the driving assist
systems
ABS (Anti-lock Brake System)
■
Helps to prevent wheel lock when the
brakes are applied suddenly, or if the
brakes are applied while driving on a
slippery road surface
Brake assist
■
Generates an increased level of brak-
ing force after the brake pedal is
depressed when the system detects a
panic stop situation
VSC (Vehicle Stability Control)
■
Helps the driver to control skidding
when swerving suddenly or turning on
slippery road surfaces. Provides coop-
erative control of the ABS, TRC, VSC
and EPS. Helps to maintain directional
stability when swerving on slippery
road surfaces by controlling steering
performance.
Secondary Collision Brake (if
■
equipped)
When the SRS airbag sensor detects a
4-5. Using the driving support systems
collision and the system operates, the
brakes and brake lights are automati-
cally controlled to reduce the vehicle
speed and help reduce the possibility
of further damage due to a secondary
collision.
TRC (Traction Control)
■
Helps to maintain drive power and pre-
vent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads
Active Cornering Assist (ACA)
■
Helps to prevent the vehicle from drift-
ing to the outer side by performing
inner wheel brake control when
attempting to accelerate while turning
Hill-start assist control
■
Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill
EPS (Electric Power Steering)
■
Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel
AVS (Adaptive Variable Suspen-
■
sion System) (if equipped)
By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
the road and driving conditions, this
system helps riding comfort with supe-
rior vehicle stability, and helps good
vehicle posture
Also, the damping force changes
depending on the selected driving
mode. (P.265)
305
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