Lexus ES300 Owner's Manual page 146

COMFORT ADJUSTMENT
This SRS airbag system has an indicator to inform the driver
of operating problems. If either of the following conditions
occurs, this indicates a malfunction of the airbags. Contact
your Lexus dealer as soon as possible to service the vehicle.
D When the ignition key is turned to the "ON" position, the light
does not come on, stays on or flashes.
D The light comes on or starts flashing while driving.
If the light stays on, it indicates that the SRS front airbags have
a problem. If the light flashes, the SRS side and curtain shield
airbags have a problem.
132
16E470
In the following cases, contact your Lexus dealer as soon as
possible:
D Any of the SRS airbags have been inflated.
D The front of the vehicle and portion of the doors (shaded in
the illustration) were involved in an accident that was not
severe enough to cause the SRS airbags to inflate.