Toyota Sequoia 2011 Manual page 114

Operating conditions (front airbags)
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The SRS front airbags will deploy in the event of an impact that exceeds
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the set threshold level (the level of force corresponding to an approxi-
mately 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.).
It is possible that in some collisions where the forward deceleration of the
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vehicle is very close to the designed threshold level, the SRS front air-
bags and the seat belt pretensioners may not activate together.
The SRS front passenger airbag will not activate if there is no passenger
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sitting in the front passenger seat. However, the front passenger airbag
may deploy if luggage is put in the seat, or the seat belt is fastened, even
if the seat is unoccupied. (→P. 125)
Operating conditions (side airbags & curtain shield airbags)
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The SRS side airbags & SRS curtain shield airbags will deploy in the event
of an impact that exceeds the set threshold level (the level of force corre-
sponding to the impact force produced by an approximately 3307 lb. [1500
kg] vehicle colliding with the vehicle cabin from a direction perpendicular to
the vehicle orientation at an approximate speed of 12-18 mph [20-30 km/h]).
Operating conditions (side airbags)
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The SRS side airbag on the passenger seat will activate even if there is no
passenger sitting in the front passenger seat. (→P. 125)
Operating conditions (curtain shield airbags)
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The SRS curtain shield airbags are designed to inflate when the passenger
compartment is subjected to a severe impact from the side or vehicle roll-
over. Depending on the conditions and type of accident, there are times
when the curtain shield airbags may deploy (inflate) in a front impact.
1-7. Safety information
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