Lexus SC 430 2004 Manual page 68

(n) Vehicle Stability Control System Warning
Lights
These lights warn that there is a problem somewhere in the
vehicle stability control system or traction control system.
If the "VSC" warning light and "VSC OFF" indicator light come
on, have your vehicle checked by Lexus dealer as soon as
possible.
The lights will come on when the ignition switch is turned to
"ON", and will go off after about a few seconds.
The lights may stay on for 60 seconds after the ignition switch
is turned to the "ON" position. It is normal if they go out after
a while.
Depressing the brake pedal repeatedly may turn on the lights.
It is normal if they go out after a few seconds.
If the "VSC" warning light and "VSC OFF" indicator light come
on, the vehicle stability control system does not activate,
however, it is no problem to continue your driving.
GAUGES, METERS AND SERVICE REMINDER INDICATORS
(o) Low Tire Pressure Warning Light and
Chimes
This light and chimes warn you that the tire inflation pressure
is low. This light comes on when the ignition switch is turned
to the "ON" position and goes off after a few seconds. This
means the low tire pressure warning light is operating properly.
If the warning light does not go off, or comes on or blinks during
driving, or the chimes sound, this indicates that tire inflation
pressure is low. Make sure there is no flat tire. If the warning
light comes on again even after air is put in the tires, a tire may
still be flat.
If this warning light comes on, the action you must take is
completely different depending on the type of tires used. You
must understand how to distinguish tires between standard
tires and run-flat tires in order to operate your vehicle safely
and should refer to page 341.
If you drive over about 180 km/h (112 mph) with the tires not
inflated at the designated pressure for high speed driving, the
warning light may turn on. If the tires are at the designated
pressure for ordinary speed driving, decreasing the speed will
turn off the warning light. (For the designated pressure for high
speed driving, see "Specifications" on page 326.)
This warning light may turn on due to natural causes such as
natural air leaks or tire inflation pressure changes caused by
temperature. In this case, adjusting the tire inflation pressure
will turn off the warning light. For details about adjusting the tire
inflation pressure, see "Checking tire inflation pressure" on
page 329.
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