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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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•a readiness light and tone
•a diagnostic module
•and the electrical wiring which connects the components
The diagnostic module monitors its own internal circuits and the
supplemental air bag electrical system wiring (including the impact
sensors), the system wiring, the air bag system readiness light, the air
bag back up power and the air bag ignitors.
Several air bag system components get hot after inflation. Do not
touch them after inflation.
If the air bag has deployed,the air bag will not function
again and must be replaced immediately.If the air bag is not
replaced, the unrepaired area will increase the risk of injury in a
collision.
Front passenger sensing system
The front passenger sensing system will turn off the front passenger’s
frontal airbag under certain conditions. For side airbag equipped
vehicles, the front passenger sensing system will turn off the passenger
seat side airbag if the seat is empty (unless for some reason the safety
belt is properly buckled). The front passenger sensing system works with
sensors that are part of the front passenger’s seat and safety belt. The
sensors are designed to detect the presence of a properly-seated
occupant and determine if the front passenger’s frontal airbag should be
enabled (may inflate) or not.
The front passenger sensing system is designed to meet the regulatory
requirements of Federal Motor Vehicle Safety Standard (FMVSS) 208
and is designed to turn off the front passenger’s frontal airbag if:
•the front passenger seat is unoccupied, or has small/medium objects in
the front seat,
•the system determines that an infant is present in a rear-facing infant
seat that is installed according to the manufacturer’s instructions,
•the system determines that a small child is present in a forward-facing
child restraint that is installed according to the manufacturer’s
instructions,
•the system determines that a small child is present in a booster seat,
•a front passenger takes his/her weight off of the seat for a period of
time,
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•A smaller person, such as a child who has outgrown child restraints,
or a small adult occupies the front passenger seat.
Even with the front passenger sensing system, children 12 and
under should be properly restrained in the back seat.
When the front passenger seat is
occupied and the sensing system
has turned off the passenger’s
frontal airbag, thepassenger airbag
offorpass airbag offindicator will light and stay lit to remind you that
the front passenger frontal airbag is off. When the front passenger seat is
not occupied (empty seat) or in the event that the front passenger
frontal airbag is enabled (may inflate), the indicator light will be unlit.
Thepass airbag offindicator light is located on the top right corner of
the center stack of the instrument panel above the radio. To confirm the
indicator light is functional, it will momentarily illuminate when the
ignition is turned to the ON position.
The front passenger sensing system is designed to turn off the front
passenger’s frontal airbag when a rear facing infant seat, a forward-facing
child restraint, or a booster seat is detected. If the child restraint has
been installed and the indicator is not lit, then turn the vehicle off,
remove the child restraint from the vehicle and reinstall the restraint
following the child restraint manufacturer’s directions.
The front passenger sensing system is designed to enable (may inflate)
the right front passenger’s frontal airbag anytime the system senses that
a person of adult size is sitting properly in the front passenger seat.
When the passenger sensing system has allowed the airbag to be
enabled, the indicator will be unlit and stay unlit to remind you that the
airbag is enabled (may inflate).
If a person of adult-size is sitting in the front passenger’s seat, but the
passenger airbag offorpass airbag offindicator is lit, it is possible
that the person isn’t sitting properly in the seat. If this happens, turn the
vehicle off and ask the person to place the seatback in the full upright
position, sit upright in the seat, centered on the seat cushion, with the
person’s legs comfortably extended. Restart the vehicle and have the
person remain in this position for about two minutes. This will allow the
system to detect that person and enable the passenger’s airbag. If the
indicator lamp remains lit even after this, the occupant should be advised
to ride in the rear seat.
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After all occupants have adjusted their seats and put on safety belts, it’s
very important that they continue to sit upright with their back against
the seatback, with their feet comfortably extended on the floor while the
vehicle is still in motion. Sitting improperly can increase the chance of
injury in a crash event. For example, if an occupant slouches, lies down,
turns sideways, sits forward, leans forward or sideways, or puts one or
both feet up, the chance of injury during a crash is greatly increased.
Sitting improperly out of position or with the seat back reclined
too far can take off weight from the seat cushion and affect the
decision of the passenger sensing system, resulting in serious injury or
death in a crash. Always sit upright against your seatback, with your
feet on the floor.
The front passenger sensing system may detect small or medium objects
placed on the seat cushion. For most objects that are in the front
passenger seat, the passenger airbag will be disabled. Even though the
passenger airbag is disabled, thepass airbag offlight may or may not
be illuminated according to the table below.
ObjectsPass Airbag Off
Indicator LightPassenger Airbag
Empty seat Unlit Disabled
Small (i.e. 3 ring binder,
small purse, bottled water)Unlit Disabled
Medium (i.e. heavy briefcase,
fully packed luggage)Lit Disabled
Empty seat, Small or medium
object with safety belt
buckledLit Disabled
In case there is a problem with the
passenger sensing system, the
airbag readiness light in the
instrument cluster will stay lit. DO
NOT attempt to repair or service the system; take your vehicle
immediately to the dealer.
The front passenger airbag is not designed to offer protection to
an occupant in the center seating position.
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An out of position front center occupant could affect the
decision of the front passenger sensing system.
If it is necessary to modify an advanced front airbag system to
accommodate a person with disabilities, contact the Ford Customer
Relationship Center at the phone number shown in the Customer
Assistance section of this Owners Guide.
Any alteration/modification to the front passenger seat may
affect the performance of the front passenger sensing system.
Side air bag system (if equipped)
Do not place objects or mount equipment on or near the air bag
cover on the side of the seatbacks of the front seats or in front
seat areas that may come into contact with a deploying air bag. Failure
to follow these instructions may increase the risk of personal injury in
the event of a collision.
Do not use accessory seat covers. The use of accessory seat
covers may prevent the deployment of the side air bags and
increase the risk of injury in an accident.
Do not lean your head on the door. The side air bag could injure
you as it deploys from the side of the seatback.
Do not attempt to service, repair, or modify the air bag SRS, its
fuses or the seat cover on a seat containing an air bag. See your
Ford or Lincoln Mercury dealer.
All occupants of the vehicle should always wear their safety belts
even when an air bag SRS is provided.
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How does the side air bag system work?
The design and development of the side air bag system included
recommended testing procedures that were developed by a group of
automotive safety experts known as the Side Air Bag Technical Working
Group. These recommended testing procedures help reduce the risk of
injuries related to the deployment of side air bags.
The side air bag system consists of
the following:
•An inflatable nylon bag (air bag)
with a gas generator concealed
behind the outboard bolster of
the driver and front passenger
seatbacks.
•A special seat cover designed to
allow air bag deployment.
•The same warning light,
electronic control and diagnostic
unit as used for the front air
bags.
•Two crash sensors located under
the outboard side of the front
seats, attached to the floor.
Side air bags, in combination with safety belts, can help reduce the risk
of severe injuries in the event of a significant side impact collision.
The side air bags are fitted on the outboard side of the seatbacks of the
front seats. In certain lateral collisions, the air bag on the side affected
by the collision will be inflated. The front passenger sensing system will
turn off the passenger seat side air bag if the seat is empty. The air bag
was designed to inflate between the door panel and occupant to further
enhance the protection provided to occupants in side impact collisions.
The air bag SRS is designed to activate when the vehicle sustains lateral
deceleration sufficient to cause the sensors to initiate 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 of the type sufficient to cause activation. Side air bags are designed
to inflate in side-impact collisions, not roll-over, rear-impact, frontal or
near-frontal collisions, unless the collision causes sufficient lateral
deceleration.
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Several air bag system components get hot after inflation. Do not
touch them after inflation.
If the side air bag has
deployed,the air bag will
not function again. The side
air bag system (including the
seat) must be inspected and
serviced by a qualified
technician in accordance with
the vehicle service manual.If
the air bag is not replaced, the
unrepaired area will increase the
risk of injury in a collision.
Determining if the system is operational
The SRS uses a readiness light in the instrument cluster or a tone to
indicate the condition of the system. Refer toAir bag readinesssection
in theInstrument Clusterchapter. Routine maintenance of the air bag is
not required.
A difficulty with the system is indicated by one or more of the following:
•The readiness light will either
flash or stay lit.
•The readiness light will not
illuminate immediately after
ignition is turned on.
•A series of five beeps will be heard. The tone pattern will repeat
periodically until the problem and/or light are repaired.
If any of these things happen, even intermittently, have the SRS serviced
at your dealership or by a qualified technician immediately. Unless
serviced, the system may not function properly in the event of a
collision.
Disposal of air bags and air bag equipped vehicles
See your local dealership or qualified technician. Air bags MUST BE
disposed of by qualified personnel.
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SAFETY RESTRAINTS FOR CHILDREN
See the following sections for directions on how to properly use safety
restraints for children. Also seeAir bag supplemental restraint system
(SRS)in this chapter for special instructions about using air bags.
Important child restraint precautions
You are required by law to use safety restraints for children in the U.S.
and Canada. If small children (generally children who are four years old
or younger and who weigh 40 lb. [18 kg] or less) ride in your vehicle, you
must put them in safety seats made especially for children. Many states
require that children use approved booster seats until they are eight
years old. Check your local and state or provincial laws for specific
requirements regarding the safety of children in your vehicle. When
possible, always place children under age 12 in the rear seat of your
vehicle. Accident statistics suggest that children are safer when properly
restrained in the rear seating positions than in the front seating position.
Never let a passenger hold a child on his or her lap while the
vehicle is moving. The passenger cannot protect the child from
injury in a collision.
Always follow the instructions and warnings that come with any infant or
child restraint you might use.
Children and safety belts
If the child is the proper size, restrain the child in a safety seat. Children
who are too large for child safety seats (as specified by your child safety
seat manufacturer) should always wear safety belts.
Follow all the important safety restraint and air bag precautions that
apply to adult passengers in your vehicle.
If the shoulder belt portion of a combination lap and shoulder belt can
be positioned so it does not cross or rest in front of the child’s face or
neck, the child should wear the lap and shoulder belt. Moving the child
closer to the center of the vehicle may help provide a good shoulder belt
fit.
Do not leave children, unreliable adults, or pets unattended in
your vehicle.
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