2004 FORD FREESTAR sensor

How does the air bag supplemental restraint system work?
The air bag SRS is designed to
activate when the vehicle sustains
longitudinal deceleration sufficient
to cause the 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 of the
type sufficient to cause activation.
Front 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 (to lubricate the bag) or
sodium compounds (e.g., baking
soda) that result from the
combustion process that inflates the
air bag. Small amounts of sodium
hydroxide may be present which
may irritate the skin and eyes, but
none of the residue is toxic.
While the system 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. Thus, it is extremely important that occupants be
properly restrained as far away from the air bag module as possible while
maintaining vehicle control.
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
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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.
The SRS consists of:
•driver and passenger air bag modules (which include the inflators and
air bags).
•side air bags (if equipped). Refer toSide air bag systemlater in this
chapter.
•one or more impact and safing sensors.
•a readiness light and tone.
•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.
Front passenger sensing system
The front passenger sensing system will turn off the front passenger’s
frontal air bag under certain conditions. The driver’s air bag and side air
bag are not part of the front passenger sensing system. 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 air bag 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 air bag if:
•the front passenger seat is unoccupied,
•an infant or small child weighing less than 50 pounds (23 kg) is in the
front seat, either in a child restraint, in a booster seat, or sitting
directly on the vehicle seat,
•a front passenger takes his/her weight off the seat for a period of time
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
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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.
How does the side air bag system work?
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 airbag 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 seat 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, even if the respective seat is not
occupied. The air bag was designed to inflate between the door panel
and occupant to further enhance the protection provided 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 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
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
145

All occupants of the vehicle including the driver should always
wear their safety belts even when an air bag SRS and Safety
Canopy
system is provided.
To reduce risk of injury, do not obstruct or place objects in the
deployment path of the inflatable Safety Canopy
.
How does the Safety Canopysystem work?
The design and development of the
Safety Canopy
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 airbags (including the Safety
Canopy
).
The Safety Canopy
system
consists of the following:
•An inflatable nylon curtain with a
gas generator concealed behind
the headliner and above the doors
(one on each side of vehicle).
•A headliner designed to flex open above the side doors to allow Safety
Canopy
deployment.
•The same warning light, electronic control and diagnostic unit as used
for the front airbags.
•Two crash sensors mounted under the front seats (one on each side).
•Two crash sensors located at the c-pillar behind the rear doors (one
on each side).
•Rollover sensor in the restraints control module (RCM).
The Safety Canopy
system, in combination with seat belts, can help
reduce the risk of severe injuries in the event of a significant side impact
collision or rollover event.
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
147

Children 12 years old and under should always be properly restrained in
the second or third row seats. The Safety Canopy
will not interfere
with children restrained using a properly installed child or booster seat
because it is designed to inflate downward from the headliner above the
doors along the side window opening.
The Safety Canopy
system is designed to activate when the vehicle
sustains lateral deceleration sufficient to cause the side crash sensor to
close an electrical circuit that initiates Safety Canopy
inflation or when
a certain likelihood of a rollover event is detected by the rollover sensor.
The Safety Canopy
is mounted to roof side-rail sheet metal, behind the
headliner, along the entire side of the vehicle. In certain lateral collisions
or rollover events, the Safety Canopy
system will be activated,
regardless of which seats are occupied. In certain rollover events, the
Safety Canopy
on both sides of the vehicle will be inflated, regardless
of which seats are occupied. The Safety Canopy
is designed to inflate
between the side window area and occupants to further enhance
protection provided in side impact collisions and rollover events.
The fact that the Safety Canopy
did not activate 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. The Safety
Canopy
is designed to inflate in certain side impact collisions or
rollover events, not in rear impact, frontal or near-frontal collisions,
unless the collision causes sufficient lateral deceleration or rollover
likelihood.
Several Safety Canopy

system components get hot
after inflation. Do not touch them
after inflation.
If the Safety Canopy
system has deployed,the Safety
Canopy
will not function again unless replaced. The
Safety Canopy
system (including the A, B, C, and D pillar
trim) must be inspected and serviced by a qualified technician
in accordance with the vehicle service manual.If the Safety
Canopy
is not replaced, the unrepaired area will increase the risk of
injury in a collision.
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Seating and Safety Restraints
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Brake Assist (if equipped as part of the AdvanceTracsystem)
The Brake Assist system provides full braking force during panic braking
situations. It detects a rapid application of the brake pedal and
maximizes the amount of brake booster assist, helping the driver to
achieve maximum braking pressure. Once a panic brake application is
detected, the system will remain activated as long as the brake pedal is
depressed. The system is deactivated by releasing the brake pedal.
When the system activates, the brake pedal will travel with very little
effort; this is normal.
Parking brake
To set the parking brake, pull the
handle up as far as possible. The
BRAKE warning lamp will illuminate
and will remain illuminated until the
parking brake is released.
To release, press and hold the
button, pull the handle up slightly,
then push the handle down.
Always set the parking
brake fully and make sure
that the gearshift is securely
latched in P (Park).
ADVANCETRACSTABILITY ENHANCEMENT SYSTEM
(IF EQUIPPED)
The AdvanceTrac
system helps the driver maintain the stability and
steer-ability of the vehicle. The system integrates anti-lock braking
system (ABS) and Traction Control
and a more advanced function to
further enhance the stability of the vehicle.
AdvanceTrac
constantly monitors the vehicle motion relative to the
driver’s intended course. This is done by using added sensors that
compare the steering inputs from the driver with the actual motion of
the vehicle. AdvanceTrac
determines whether an engine torque
reduction or brake application is needed to help control the vehicle. If
the vehicle begins to rotate excessively left or right, spin out, or slide
sideways, the system will attempt to correct the excessive motion. If the
vehicle does not respond to steering inputs, the system will attempt to
increase the turning response of the vehicle.
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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If the vehicle is stuck in snow or mud or when driving in deep sand,
switching off the AdvanceTrac
system may be beneficial so the wheels
are allowed to spin. If your vehicle seems to lose engine power while
driving in deep sand or very deep snow, switching off the AdvanceTrac

stability enhancement feature will restore full engine power and will
enhance momentum through the obstacle.
Some drivers may notice a slight movement of the brake pedal when the
AdvanceTrac
performs a system self-check. During AdvanceTrac

operation you may experience the following:
•A rumble or grinding noise
•A slight deceleration of the vehicle
•The TRAC ACTIVE indicator light will illuminate
•If your foot is on the brake pedal, you will feel a vibration in the
pedal.
•If the driving condition is severe and your foot is not on the brake, the
brake pedal will move to apply higher brake forces. You may also hear
a whoosh of air from under the instrument panel during this severe
condition.
All these conditions are normal during AdvanceTrac
operation.
If the AdvaceTrac system is activated for an extended period of time, the
brake portion of the system will shut down to allow the brakes to cool
down. A limited AdvanceTrac
function using only engine power
reduction will still help control the wheels from over-spinning. When the
brakes have cooled down, the system will again function normally.
Anti-lock braking is not affected by this condition and will function
normally during the cool-down period.
Do not alter or modify your vehicle’s suspension or steering; the
resulting changes to the vehicle’s handling can adversely affect
the AdvanceTrac
system. Also, do not install a stereo
loudspeaker near the front center console or under either front
seat. The speaker vibrations can adversely affect the
AdvanceTrac
sensors located in this area.
Aggressive driving in any road conditions can cause you to lose
control of your vehicle increasing the risk of severe personal
injury or property damage. The occurrence of an AdvanceTrac
event
is an indication that at least some of the tires have exceeded their
ability to grip the road; this may lead to an increased risk of loss of
vehicle control, vehicle rollover, personal injury and death. If you
experience a severe road event, SLOW DOWN.
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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OFF indicator remains illuminated when the system is disabled. If the
indicator light illuminates when the RSS is not turned off, it may indicate
a failure in the RSS.
The system defaults toenabledevery time the ignition is turned on.
Press the control to disable or enable the system.
Keep the RSS sensors (located on the rear bumper/fascia) free
from snow, ice and large accumulations of dirt (do not clean the
sensors with sharp objects). If the sensors are covered, it will
affect the accuracy of the RSS.
If your vehicle sustains damage to the rear bumper/fascia, leaving
it misaligned or bent, the sensing zone may be altered causing
inaccurate measurement of obstacles or false alarms.
DRIVING THROUGH WATER
If driving through deep or standing water is unavoidable, proceed very
slowly especially if the depth is not known. Never drive through water
that is higher than the bottom of the hubs (for trucks) or the bottom of
the wheel rims (for cars). Traction or brake capability may be limited
and your vehicle may stall. Water may also enter your engine’s air intake
and severely damage your engine.
Once through the water, always dry the brakes by moving your vehicle
slowly while applying light pressure on the brake pedal. Wet brakes do
not stop the vehicle as quickly as dry brakes.Driving through deep
water where the transmission vent tube is submerged may allow
water into the transmission and cause internal transmission
damage.
VEHICLE LOADING – WITH AND WITHOUT A TRAILER
This section will guide you in the proper loading of your vehicle and/or
trailer, to keep your loaded vehicle weight within its design rating
capability, with or without a trailer. Properly loading your vehicle will
provide maximum return of vehicle design performance. Before loading
your vehicle, familiarize yourself with the following terms for determining
your vehicle’s weight ratings, with or without a trailer, from the vehicle’s
Safety Certification Label and Tire and Load Information Label:
Base Curb Weight– is the weight of the vehicle including a full tank of
fuel and all standard equipment. It does not include passengers, cargo, or
optional equipment.
Vehicle Curb Weight– is the weight of your new vehicle when you
picked it up from your dealer plus any aftermarket equipment.
2004 Windstar(win)
Owners Guide (post-2002-fmt)
USA English(fus)
Driving
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