2001 Lexus ES300 traction control

STARTING AND DRIVING
303
You can turn off the traction control system by
pushing the ªTRAC OFFº switch. The ªTRAC OFFº
indicator/warning light will then come on. Pushing
the ªTRAC OFFº switch a second time turns the
system back on and extinguishes the ªTRAC OFFº
indicator/warning light.
You may hear a sound in the engine compartment for a
few seconds when the engine is started or just after the
vehicle is started. This means that the traction control
system is in the self
±check mode, and does not indicate
malfunction.
When the traction control system is operating, you may
feel vibration or noise of your vehicle, caused by
operation of the brakes. This indicates the system is
functioning properly.
When getting the vehicle out of mud or new snow, etc.
the traction control system will help operate to prevent
the wheels from spinning.
Traction control failure warning
The ªTRAC OFFº indicator/warning light warns that
when there is a problem somewhere in the traction
control system.
The light will come on when the ignition key is turned to
ªONº, and will go off after a few seconds.
If either of the following conditions occurs, this indicates
malfunction somewhere in the parts monitored by the
warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle.
 The light does not come after the ignition is turned to
on.
 The light is left on after the ignition is turned to on.
 The light comes on while driving without pushing
ªTRAC OFFº switch.
 The light flashes.
CAUTION
Under certain slippery road conditions, full traction of
the vehicle and power to the front wheels cannot be
maintained, even though the traction control system is
in operation. Do not drive the vehicle under any speed
or maneuvering conditions which will cause the vehicle
to lose traction. In situations where the road surface is
covered with ice or snow, your vehicle should be fitted
with snow tires or tire chains. Always drive at an
appropriate and cautious pace.

STARTING AND DRIVING
304
VEHICLE SKID CONTROLSYSTEM
The vehicle skid control system helps provide
comprehensive control of the systems such as an
anti±lock brake system, brake assist system,
traction control, engine control, etc. This system
automatically controls the output of the brakes or
engine to help prevent the vehicle from skidding
when cornering on a slippery road surface or abrupt
steering wheel operation occurs.
31E013±1

Slip indicator light
If the vehicle is going to skid during driving, the slip
indicator light flashes and an alarm sounds
intermittently.
The vehicle skid control activates when the vehicle
speed is about more than 15 km/h (9 mph). You may hear a sound in the engine compartment for a
few seconds when the engine is started or just after the
vehicle is started. This means that the vehicle skid
control is in the self±check mode and does not indicate
a malfunction.

STARTING AND DRIVING
305
31E081
You can turn off the vehicle skid control system by
pushing the ªVSC OFFº switch. The ªVSC OFFº
indicator comes on. At this time, the traction control
system also turns off. You cannot turn off either one
of them. Pushing the ªVSC OFFº switch a second
time turns the system back on and extinguishes the
ªVSC OFFº indicator light.
When you turn the ignition switch on, this system always
turns on.Vehicle skid control system failure
warning
31E047

STARTING AND DRIVING
306These lights warn that there is a problem somewhere in
the vehicle skid control system, traction control system
or brake assist system.
The lights will come on when the ignition key is turned to
ªONº, and will go off after a few seconds.
If the ªVSCº warning light and ªVSC OFFº indicator light
come
on, the vehicle skid control system, traction control
system and brake assist system do not work. However,
as conventional braking operates when applied, there is
no problem to continue your driving.
If either of the following conditions occurs, this indicates
a malfunction somewhere in the parts monitored by the
warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle:
 The ªVSCº warning light and/or ªVSC OFFº indicator
light do/does not come on after the ignition is turned
to on. 
The ªVSCº warning light and ªVSC OFFº indicator
light are left on after the ignition is turned to on.
 The ªVSCº warning light and ªVSC OFFº indicator
light come on while driving without pushing ªVSC
OFFº switch.

STARTING AND DRIVING
313
ªABSº warning light
31E068
The light comes on when the ignition key is turned to the
ªONº position. If the anti±lock brake system and the
brake
assist system work properly, the light turns off after
a few seconds. Thereafter, if either of the systems
malfunctions, the light comes on again.
When the ªABSº warning light is on (and the brake
system warning light is off), the anti±lock brake system,
the brake assist system, the traction control system and
the vehicle skid control system do not operate, but the
brake system still operates conventionally.
When the ªABSº warning light is on (and the brake
system warning light is off), the anti±lock brake system
does not operate so that the wheels could lock up during
a sudden braking or braking on slippery road surfaces. If either of the following conditions occurs, this
indicates a malfunction somewhere in the parts
monitored by the warning light system. Contact
your
Lexus dealer as soon as possible to service the
vehicle.
 The light does not come on when the ignition key is
turned to the ªONº position, or remains on.
 The light comes on while you are driving.
A warning light turning on briefly during operation does
not indicate a problem.

CHASSIS
425


Vehicles equipped with traction control system
To check the fluid level, simply look at the
see±through
reservoir. The level should be between
the ªMAXº and ªMINº lines on the tank.
It is normal for the brake fluid level to go down slightly as
the brake pads wear. So be sure to keep the reservoir
filled.
If the reservoir needs frequent refilling, it may indicate a
serious mechanical problem.
If the level is low, add FMVSS No.116 DOT 3 or SAE
J1703 brake fluid to the brake reservoir.
Remove and replace the reservoir cap by hand. Add
brake fluid up to the ªMAXº line.
Use only newly opened brake fluid. Once opened, brake
fluid absorbs moisture from the air, and excess moisture
can cause a dangerous loss of braking efficiency.
CAUTION
Take care when filling the reservoir because brake fluid
can harm your hands or eyes and damage painted
surfaces. If fluid gets in your hands or eyes, flush them
with clean water immediately. If you still feel
uncomfortable with your hands or eyes, go to the
doctor.

CHASSIS
435
If you have tire damage such as cuts, splits, cracks
deep enough to expose the fabric, or bulges
indicating internal damage, the tire should be
replaced.
If a tire often goes flat or cannot be properly repaired due
to the size or location of a cut or other damage, it should
be replaced. If you are not sure, consult with your Lexus
dealer.
If an air loss occurs while driving, do not continue driving
with a deflated tire. Driving even a short distance can
damage a tire beyond repair.
Any tires which are over 6 years old must be
checked by a qualified technician even if damage is
not obvious.
Tires deteriorate with age even if they have never or
seldom been used.
This also applies to the spare tire and tires stored for
future use.
Uniform tire quality grading
This information has been prepared in accordance
with regulations issued by the National Highway
Traffic
Safety Administration of the U.S. Department
of Transportation. It provides the purchasers and/or
prospective purchasers of Lexus vehicles with
information on uniform tire quality grading.
Your Lexus dealer will help answer any questions
you may have as you read this information.
DOT quality grades ± All passenger car tires must
conform to Federal Safety Requirements in addition
to these grades. Quality grades can be found where
applicable on the tire sidewall between tread
shoulder and maximum section width. For example:
Treadwear 200 Traction AA Temperature A
Treadwear ± The treadwear grade is a comparative
rating based on the wear rate of the tire when tested
under controlled conditions on a specified government
test course. For example, a tire graded 150 would wear
one and a half (1 ± 1/2) times as well on the government
course as a tire graded 100. The relative performance
of tires depends upon the actual conditions of their use,
however, and may depart significantly from the norm
due to variations in driving habits, service practices and
differences in road characteristics and climate.
Traction AA, A, B, C ± The traction grades, from highest
to lowest, are AA, A, B and C, and they represent the
tire's ability to stop on wet pavement as measured under

CHASSIS
436controlled conditions on specified government test
surfaces of asphalt and concrete. A tire marked C may
have poor traction performance.
Warning: The traction grade assigned to this tire is
based on braking (straight ahead) traction tests and
does not include cornering (turning) traction.
Temperature A, B, C
± The temperature grades are A
(the highest), B, and C, representing the tire's resistance
to the generation of heat and its ability to dissipate heat
when tested under controlled conditions on a specified
indoor laboratory test wheel. Sustained high
temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade
C corresponds to a level of performance which all
passenger car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grade for this tire established
for a tire that is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading,
either separately or in combination, can cause heat
buildup and possible tire failure.