Lexus ES300 Owner's Manual page 258

STARTING AND DRIVING
"ABS" warning light
" 1 U.S.A. 2 Canada
Vehicles without vehicle skid control system—
The light comes on when the ignition key is turned to the "ON"
position. If the anti lock brake system works properly, the light
turns off after a few seconds. Thereafter, if either of the
systems malfunctions, the light comes on again.
When the "ABS" warning light is on (and the brake system
warning light is off), the anti lock brake system does not
operate, but the brake system still operates conventionally.
When the "ABS" 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.
244
If either of the following conditions occurs, this indicates
a malfunction somewhere in the parts monitored by the
warning light. Contact your Lexus dealer as soon as
possible to service the vehicle.
D The light does not come on when the ignition key is turned
to the "ON" position, or remains on.
D The light comes on while you are driving.
A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If the "ABS" warning light remains on together with the
brake system warning light, immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the anti lock brake system will fail
but also the vehicle will become extremely unstable
during braking.
Vehicles with vehicle skid control system—
The light comes on when the ignition key is turned to the "ON"
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.