Lexus GS300 1998 Owner's Manual page 306

31G023
This light comes on when the ignition key is turned to the
"ON" position. After about a few seconds, the light will go
off.
The light may stay on for about 60 seconds after the engine
is started. It is normal if it goes out after a while.
Depressing the brake pedal repeatedly may turn on the "ABS"
warning light. It is normal if the light goes out after a few
seconds.
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.
D The light does not come on as described above, or remains
on.
D The light comes on while driving.
Even if the anti–lock brake system should fail, the brake
system will still operate conventionally. But when the "ABS"
warning light is on (and the brake system warning light is off),
anti–lock brake system is not assisting brake performance so
that the wheels could lock up during a sudden brake or
braking on slippery road surfaces. Have your vehicle
checked by your Lexus dealer as soon as possible.
STARTING AND DRIVING
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