Lexus ES-300 2001 Manual page 323

STARTING AND DRIVING
These lights warn that there is a problem somewhere in
the vehicle skid control system, traction control system
or brake assist system.
The lights will come on when the ignition key is turned to
"ON", and will go off after a few seconds.
If the "VSC" warning light and "VSC OFF" indicator light
come on, the vehicle skid control system, traction control
system and brake assist system do not work. However,
as conventional braking operates when applied, there is
no problem to continue your driving.
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 "VSC" warning light and/or "VSC OFF" indicator
light do/does not come on after the ignition is turned
to on.
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D The "VSC" warning light and "VSC OFF" indicator
light are left on after the ignition is turned to on.
D The "VSC" warning light and "VSC OFF" indicator
light come on while driving without pushing "VSC
OFF" switch.