Lexus LX 470 Owner's Manual page 245

When the "VSC/TRAC" warning light and "VSC OFF" indicator
light come on, the vehicle skid control system is not operating,
but there is no problem if you continue to drive.
In the following cases, contact your Lexus dealer:
D The "VSC/TRAC" warning light, "VSC OFF" indicator light
and slip indicator light do not come on after the ignition is
turned to on.
D The "VSC/TRAC" warning light and "VSC OFF" indicator
light remain on after the ignition is turned to on.
D The "VSC OFF" indicator light comes on while driving
without pushing the center differential lock switch.
CAUTION
D Active traction control system, vehicle skid control
system and anti−lock brake system are electronic
systems designed to help the driver maintain control
under adverse conditions. They are not a substitute
for safe driving practices. Factors including speed,
road conditions and driver steering input can all
affect whether active traction control system, vehicle
skid control system and anti−lock brake system will
be effective in preventing a loss of control. Always
keep safety driving in mind. If the slip indicator light
flashes, sounding an alarm, special care should be
taken while driving.
STARTING AND DRIVING
D Only use tires of specified size. The size,
manufacturer, brand and tread pattern for all 4 tires
should be the same. If you use the tires other than
specified, or different type or size, the vehicle skid
control system may not function correctly. When
replacing the tires or wheels, contact your Lexus
dealer. (See "Checking and replacing tires" on page
313.)
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