Toyota LEXUS LS430 2005 Manual page 207

OCCUPANT RESTRAINT SYSTEMS
16L330b
The indicator comes on when the ignition switch is turned
to the "ON" position. It goes off after about 6 seconds.
This means the SRS front airbags are operating properly.
This warning light system monitors the airbag sensor
assembly, front airbag sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver's seat position sensor, driver's seat belt buckle switch,
occupant detection sensor, front passenger's seat belt buckle
switch, seat belt pretensioner assemblies, inflators, warning
light, interconnecting wiring and power sources. (For details,
see "Service reminder indicators and warning buzzers" on
page 82.)
188
If any of the following conditions occurs, this indicates a
malfunction of the airbags or seat belt pretensioners. Contact
your Lexus dealer as soon as possible.
D When the ignition switch is turned to the "ON" position, the
light does not come on or remains on for more than 6
seconds.
D The light comes on while driving.