Lexus GS430 User Manual page 101

A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If either of the following conditions occurs, immediately
stop your vehicle at a safe place and contact your Lexus
dealer.
D The light does not turn off even after the parking
brake is released while the engine is running.
In this case, the brakes may not work properly and
your stopping distance will become longer. Depress
the brake pedal firmly and bring the vehicle to an
immediate stop.
D The brake system warning light remains on together
with the "ABS" warning light.
In this case, not only the anti−lock brake system will
fail but also the vehicle will become extremely
unstable during braking.
GS430 only—Any of the following conditions may occur,
but do not indicate the malfunction:
D The light may stay on for about 60 seconds after the engine
is started. It is normal if it turns off after a while.
D Depressing the brake pedal repeatedly may turn on the
warning light and buzzer. It is normal if the light turns off and
the buzzer stops sounding after a few seconds.
GAUGES, METERS AND SERVICE REMINDER INDICATORS
D You may hear a small sound in the engine compartment
after the engine is started or the brake pedal is depressed
repeatedly. This is a pump pulsating sound of the brake
system, and it is not a malfunction.
(b) Brake System Warning Light (yellow)
The light comes on when the engine switch is selected in
"IG−ON" mode.
GS430—If the engine is started, and the traction control
system, vehicle stability control system and hill−start assist
control system work properly, the light turns off after a few
seconds. Thereafter, if any part of the system malfunctions,
the light comes on again.
GS300—If the engine switch is selected in "IG−ON" mode, and
the traction control system, vehicle stability control system and
hill−start assist control system work properly, the light turns off
after a few seconds. Thereafter, if any part of the system
malfunctions, the light comes on again.
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
(c) Driver's Seat Belt Reminder Light and
Buzzer
The light and buzzer act as a reminder to have the driver buckle
up the seat belt.
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