Lexus 2003 SC430 Owner's Manual page 135

COMFORT ADJUSTMENT
16st04
" 1 Side airbag module (airbag and inflator)
2 Airbag module for front passenger
(airbag and inflator)
3 Side airbag sensors
4 Airbag module for driver (airbag and inflator)
5 SRS warning light
6 Airbag sensor assembly
7 Front airbag sensors
8 Door side airbag sensors
9 Occupant detection sensor
Seat belt buckle switch
10
The SRS airbag system mainly consists of the above
components, and their locations are shown in the illustration.
The airbag sensor assembly consists of a safing sensor and
airbag sensors.
118
The front airbag sensors constantly monitor the forward
deceleration of the vehicle. If an impact results in a forward
deceleration beyond the designed threshold level, the system
triggers the airbag inflators. In a severe side impact, the side
airbag sensor triggers the side airbag inflator. At this time a
chemical reaction in the inflators very quickly fills the airbags
with non–toxic gas to help restrain the forward or lateral motion
of the occupants. The front airbags then quickly deflate, so that
there is no obstruction of the driver's vision should it be
necessary to continue driving.
When the airbags inflate, they produce a loud noise and
release some smoke and residue along with non–toxic gas.
This does not indicate a fire. This smoke may remain inside
the vehicle for some time, and may cause some minor irritation
to the eyes, skin or breathing. Be sure to wash off any residue
as soon as possible to prevent any potential skin irritation with
soap and water. If you can physically and safely exit the
vehicle after a collision, you should do so at the first
opportunity.