Lexus 2003 LS Owner's Manual page 65

At this time, vibration may occur. However, if you depress the
accelerator pedal more firmly and slowly, you can drive your
vehicle at low speeds. Have your Lexus checked by your
Lexus dealer as soon as possible.
Even if the abnormality of the electronic throttle control system
is corrected during low speed driving, the system may not be
recovered until the engine is stopped and the ignition switch is
turned to "ACC" or "LOCK" position.
Emissions inspection and maintenance (I/M) programs
Your vehicle may not pass a state emission inspection if the
malfunction indicator lamp remains on. Contact your Lexus
dealer to check your vehicle's emission control system and
OBD (On–Board Diagnostics) system before taking your
vehicle for the inspection.
For details, see "Emissions inspection and maintenance (I/M)
programs" on page 340.
GAUGES, METERS AND SERVICE REMINDER INDICATORS
(g) Master Warning Light
If any system malfunctions, this warning light comes or flashes
together with a warning tone, and a warning message appears
in the multi–information display. When the cause of the
problem is eliminated, the warning tone and message on the
display will turn off.
(h) "ABS" Warning Light
The light comes on when the ignition switch is turned to the
"ON" position. If the anti–lock brake system and the brake
assist system work properly, the light turns off after a few
seconds. Thereafter, if either of the systems malfunctions, the
light comes on again.
When the "ABS" warning light is on (and the brake system
warning light is off), the anti–lock brake system, the brake
assist system, the traction control system and/or the vehicle
skid control system do/does not operate, but the brake system
still operates conventionally.
When the "ABS" warning light is on (and the brake system
warning light is off), the anti–lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces.
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