467
4-5. Using the driving support systems
4
Driving
■ When the Active
TRAC/VSC/Trailer Sway Control
systems are turned off
Be especially careful and drive at a
speed appropriate to the road condi-
tions. As these are the systems to help
enhance vehicle stability and driving
force, do not turn the Active
TRAC/VSC/Trailer Sway Control sys-
tems off unless necessary.
Trailer Sway Control is part of the VSC
system and will not operate if VSC is
turned off or experiences a malfunction.
■ Replacing tires
Make sure that all tires are of the speci-
fied size, brand, tread pattern and total
load capacity. In addition, make sure that
the tires are inflated to the recom-
mended tire inflation pressure level.
The Multi Terrain ABS, Active TRAC,
Trailer Sway Control and VSC systems
will not function correctly if different tires
are installed on the vehicle.
Contact your Lexus dealer for further
information when replacing tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or
modifying the suspension will affect the
driving assist systems, and may cause a
system to malfunction.
■ Trailer Sway Control precaution
The Trailer Sway Control system is not
able to reduce trailer sway in all situa-
tions. Depending on many factors such
as the conditions of the vehicle, trailer,
road surface and driving environment,
the Trailer Sway Control system may not
be effective. Refer to your trailer owner’s
manual for information on how to tow
your trailer properly.
■ If trailer sway occurs
Observe the following precautions.
Failing to do so may cause death or seri-
ous injury.
● Firmly grip the steering wheel. Steer
straight ahead. Do not try to control
trailer swaying by turning the steering
wheel.
● Begin releasing the accelerator pedal
immediately but very gradually to
reduce speed.
Do not increase speed. Do not apply
vehicle brakes.
If you make no extreme correction with
the steering or brakes, your vehicle and
trailer should stabilize. (P.191)
■ Secondary Collision Brake
Do not rely solely upon the Secondary
Collision Brake. This system is designed
to help reduce the possibility of further
damage due to a secondary collision,
however, that effect changes according
to various conditions. Overly relying on
the system may result in death or serious
injury.
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