Toyota Lexus IS300 Manual page 264

D You may hear the anti–lock brake system operating and feel
the brake pedal pulsating and the vibrations of the vehicle
body and steering wheel. You may also hear the motor
sound in the engine compartment even after the vehicle is
stopped.
D At the end of the anti–lock brake system activation, the
brake pedal may move a little forward.
CAUTION
Do not overestimate the anti–lock brake system:
Although the anti–lock brake system assists in
providing vehicle control, it is still important to drive
with all due care and maintain a moderate speed and
safe distance from the vehicle in front of you, because
there are limits to the vehicle stability and effectiveness
of steering wheel operation even with the anti–lock
brake system on.
If tires grip performance exceeds its capability, or if
hydroplaning occurs during high speed driving in the
rain, the anti–lock brake system does not provide
vehicle control.
Anti–lock brake system is not designed to shorten the
stopping distance: Always drive at the moderate speed
and maintain a safe distance from the vehicle in front of
you. Compared with vehicles without an anti–lock
brake system, your vehicle may require a longer
stopping distance in the following cases:
STARTING AND DRIVING
D Driving on rough, gravel or snow–covered roads.
D Driving with tire chains installed.
D Driving over the steps such as the joints on the road.
D Driving on roads where the road surface is pitted or
has other differences in surface height.
Install all 4 tires of specified size at appropriate
pressure: The anti–lock brake system detects vehicle
speeds using the speed sensors for respective wheels'
turning speeds. The use of tires other than specified
may fail to detect the accurate turning speed resulting
in a longer stopping distance.
2003 IS300 from Aug. '02 Prod. (OM53439U)
251