Lexus LX 470 Owner's Manual page 247

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The anti−lock brake system becomes operative after the
vehicle has accelerated to a speed in excess of approximately
10 km/h (6 mph). It stops operating when the vehicle
decelerates to a speed below approximately 5 km/h (3 mph).
Depressing the brake pedal on slippery road surfaces such as
on the manhole cover, the steel plate under the construction,
joints in the bridge, etc. on a rainy day tends to activate the
anti−lock brake system.
You may hear a click or motor 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 anti−lock
brake system is in the self−check mode, and does not indicate
a malfunction.
When the anti−lock brake system is activated, the
following conditions may occur. They do not indicate a
malfunction of the system:
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 to the forward.
STARTING AND DRIVING
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:
D Driving on rough, gravel or snow−covered roads.
D Driving with tire chains installed.
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