Cadillac 2005 DeVille Owner's Manual page 57

Whether your frontal airbags will or should deploy is not
based on how fast your vehicle is traveling. It depends
largely on what you hit, the direction of the impact and
how quickly your vehicle slows down.
In addition, your vehicle has "dual stage" frontal airbags,
which adjust the restraint according to crash severity.
Your vehicle is equipped with an electronic frontal sensor,
which helps the sensing system distinguish between a
moderate frontal impact and a more severe frontal
impact. For moderate frontal impacts, these airbags
inflate at a level less than full deployment. For more
severe frontal impacts, full deployment occurs. If the front
of your vehicle goes straight into a wall that does not
move or deform, the threshold level for the reduced
deployment is about 10 to 16 mph (18 to 26 km/h), and
the threshold level for a full deployment is about 18 to
24 mph (29 to 38.5 km/h). (The threshold level can vary,
however, with specific vehicle design, so that it can be
somewhat above or below this range.)
Airbags may inflate at different crash speeds. For
example:
•
If the vehicle hits a stationary object, the airbag
could inflate at a different crash speed than if
the object were moving.
•
If the object deforms, the airbag could inflate at
a different crash speed than if the object does
not deform.
•
If the vehicle hits a narrow object (like a pole) the
airbag could inflate at a different crash speed
than if the vehicle hits a wide object (like a wall).
•
If the vehicle goes into an object at an angle the
airbag could inflate at a different crash speed
than if the vehicle goes straight into the object.
The frontal airbags (driver and right front passenger) are
not intended to inflate during vehicle rollovers, rear
impacts, or in many side impacts because inflation
would not likely help the occupants.
The side impact airbags are designed to inflate in
moderate to severe side crashes. A side impact airbag
will inflate if the crash severity is above the system's
designed "threshold level." The threshold level can vary
with specific vehicle design. Side impact airbags are
not designed to inflate in frontal or near-frontal impacts,
rollovers or rear impacts, because inflation would not
likely help the occupant. A side impact airbag will
only deploy on the side of the vehicle that is struck.
In any particular crash, no one can say whether
an airbag should have inflated simply because of the
damage to a vehicle or because of what the repair costs
were. For frontal airbags, inflation is determined by
the angle of the impact and how quickly the vehicle
slows down in frontal and near-frontal impacts. For side
impact airbags, inflation is determined by the location
and severity of the impact.
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