Saab 9-5 2011 Owner's Manual page 52

The steering wheel and passenger
airbags are known as smart airbags.
There are two impact sensors on the
front upper beam. Very soon after the
moment of impact, these register that
the car is involved in a crash. Using
this information and data from the
central sensor in the control module,
the control module determines
whether or not to inflate the airbags.
The control module also controls
whether other components of the air‐
bag system are to be deployed: safety
belt pretensioners & inflatable cur‐
tains. Which airbag system compo‐
nents are deployed depends on
a number of factors, such as the force
of the crash and the angle of impact.
If the airbag system registers forces
equivalent to a high-speed crash, the
inflatable curtains will also be acti‐
vated.
If a fault arises in the airbag system
during a journey, the airbag control
indicator v on the main instrument
panel will come on.
The driver and passenger front air‐
bags are triggered by violent front-
end crashes. They are not activated
by minor front-end impacts, if the car
overturns or by rear and side-impacts.
Seats, restraints
Notice
If only Stage I is activated at the mo‐
ment of impact, Stage II will auto‐
matically be activated later to neu‐
tralize the gas generator in the air‐
bag.
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