Lexus ES300 2003 Manual page 253

"TRAC OFF" indicator light comes on for a few seconds when
the ignition key is turned to "ON". It will come on again when
you push the "TRAC OFF" switch to turn off the system.
In the following cases, contact your Lexus dealer:
D The indicator light does not come on when the ignition key
is turned to "ON".
D The indicator light remains on after the ignition is turned on.
D The indicator light comes on with the normal driving mode
while driving.
"VSC" warning light
This light warns that there is a problem somewhere in the
traction control system or the vehicle skid control system.
The light will come on when the ignition key is turned to "ON"
and will go off after a few seconds.
STARTING AND DRIVING
If the light comes on while driving, the system does not work.
However, as conventional braking operates when applied,
there is no problem to continue your driving.
In the following cases, contact your Lexus dealer:
D The warning light does not come on after the ignition key is
turned to "ON".
D The warning light remains on after the ignition key is turned
to "ON".
D The warning light comes on while driving.
The "TRAC OFF" indicator light will come on when the "VSC"
warning light comes on even if the "TRAC OFF" switch is not
pushed.
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