Lexus IS 250C 2014 Manual page 108

1-7. Safety information
SRS warning light
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This warning light system monitors the airbag sensor assembly, front airbag sensors,
side airbag sensor assemblies, driver's seat position sensor, driver's seat belt buckle
switch, front passenger occupant classification system (ECU and sensors), "AIR
BAG ON" indicator light, "AIR BAG OFF" indicator light, front passenger' s seat
belt buckle switch, seat belt pretensioner assemblies, airbags, interconnecting wir-
ing and power sources. (P. 492)
If the SRS airbags deploy (inflate)
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Bruising and slight abrasions may result from contact with a deploying (inflating)
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SRS airbag.
A loud noise and white powder will be emitted.
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Parts of the airbag module (steering wheel, airbag cover and inflator) as well as
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the front seats may be hot for several minutes. The airbag itself may also be hot.
The windshield may crack.
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For Safety Connect subscribers, if the SRS airbags deploy or in the event of a
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severe rear-end collision, the system is designed to send an emergency call to
the response center, notifying them of the vehicle' s location (without needing to
push the "SOS" button) and an agent will attempt to speak with the occupants
to ascertain the level of emergency and assistance required. If the occupants
are unable to communicate, the agent automatically treats the call as an emer-
gency and helps to dispatch the necessary emergency services. (P. 388)
SRS airbag deployment conditions (SRS front airbags)
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The SRS front airbags will deploy in the event of an impact that exceeds the
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set threshold level (the level of force corresponding to an approximately 12 -
18 mph [20 - 30 km/h] frontal collision with a fixed wall that does not move or
deform).
However, this threshold velocity will be considerably higher if the vehicle strikes
an object, such as a parked vehicle or sign pole, which can move or deform on
impact, or if the vehicle is involved in an underride collision (e.g. a collision in
which the front of the vehicle "underrides", or goes under, the bed of a truck, etc.).
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