Ford 2002 Explorer Manual page 73

Seating and Safety Restraints
How does the air bag supplemental restraint system work?
The air bag SRS is designed to
activate when the vehicle sustains a
longitudinal deceleration sufficient
to cause the air bag sensors to close
an electrical circuit that initiates air
bag inflation. The fact that the air
bags did not inflate in a collision
does not mean that something is
wrong with the system. Rather, it
means the forces were not sufficient
enough to cause activation. Air bags
are designed to inflate in frontal and
near-frontal collisions, not rollover, side-impact, or rear-impacts unless
the collision causes sufficient longitudinal deceleration.
The air bags inflate and deflate
rapidly upon activation. After air bag
deployment, it is normal to notice a
smoke-like, powdery residue or
smell the burnt propellant. This may
consist of cornstarch, talcum
powder or sodium compounds which
may irritate the skin and eyes, but
none of the residue is toxic.
While the SRS is designed to help
reduce serious injuries, contact with
a deploying air bag may also cause
abrasions, swelling or temporary
hearing loss. Because air bags must
inflate rapidly and with considerable
force, there is the risk of death or
serious injuries such as fractures, facial and eye injuries or internal
injuries, particularly to occupants who are not properly restrained or are
otherwise out of position at the time of air bag deployment. It is
extremely important that occupants be properly restrained as far away
from the air bag module as possible while maintaining vehicle control.
The SRS consists of:
• driver and passenger air bag modules (which include the inflators and
air bags)
• one or more impact and safing sensors
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