MAZDA MODEL MX-5 MIATA POWER RETRACTABLE HARDTOP 2008 Workshop Manual

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Passenger seat weight sensors
Your vehicle is also equipped with the passenger air bag deactivation indicator light. The
deactivation indicator light illuminates when the key is used to turn the passenger air bag
off or the automatic function operates based on the passenger seat weight sensors. These
sensors are located under both of the passenger seat rails. These sensors determine the total
seated weight on the passenger seat. The SAS unit is designed to prevent the passenger
front and side air bags and seat belt pretensioner system from deploying if the total seated
weight is less than approximately 30 kg (66 lb).
To reduce the chance of injuries caused by deployment of the passenger air bag, the system
deactivates the passenger front and side air bags and also the seat belt pretensioner system
when:
lThere is no passenger in the passenger seat. (The passenger air bag deactivation
indicator light does not illuminate.)
lThe total seated weight on the passenger seat is less than approximately 30 kg (66 lb).
(The passenger air bag deactivation indicator light illuminates.)
This system shuts off the passenger front and side air bags and seat belt pretensioner
system, so make sure the passenger air bag deactivation indicator light illuminates
according to the following table.
The air bag/seat belt pretensioner system warning light flashes and the passenger air bag
deactivation indicator light illuminates if the sensors have a possible malfunction. If this
happens, the passenger front and side air bags and seat belt pretensioner system will not
deploy.
Passenger air bag deactivation indicator light
This indicator light illuminates to remind you that the passenger front and side air bags and
seat belt pretensioner will not deploy during a collision.
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SRS Air Bags
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If the passenger weight sensors are working properly, the indicator light illuminates when
the ignition switch is turned to the ON position. After a specified period of time it goes out.
The passenger air bag deactivation indicator light illuminates or is off under the following conditions:Total seated weight on the passenger seat Passenger air bag
deactivation indicator light Passenger front and side
air bags Passenger seat belt
pretensioner system
Empty (Not occupied)
*OFF OFFOFF
Less than approx. 30 kg
(66 lb) ON
OFFOFF
Approx. 42 kg (93 lb) or
more OFF
ONON
If the passenger air bag has been deactivated using the key, the passenger air bag deactivation indicator light will
remain illuminated as long you leave the passenger air bag turned off, and the chart above no longer applies.
Refer to Passenger air bag deactivation switch on page 2-32.
* If the passenger seat belt is buckled, the passenger air bag deactivation indicator light illuminates, however this does not indicate a malfunction.
If the passenger air bag deactivation indicator light does not illuminate when the ignition
switch is turned to the ON position and does not illuminate as indicated in the above chart,
do not allow a child to sit in the passenger seat and consult an Authorized Mazda Dealer as
soon as possible. The system may not work properly in an accident. You must deactivate
the passenger air bag using the key (page 2-32) and consult an Authorized Mazda Dealer.
WARNING
Do not decrease the total seated weight on the front passenger seat: When an adult or large child sits on the passenger seat, decreasing the total seated
weight on the passenger seat from the total seated weight of approximately 42 kg
(93 lb) required for air bag deployment is dangerous. The passenger seat weight
sensors will detect the reduced total seated weight condition and the passenger front
and side air bags and seat belt pretensioner system will not deploy during an
accident. The passenger will not have the supplementary protection of the air bag,
which could result in serious injury. Decreasing the total seated weight on the
passenger seat from the total seated weight of approximately 42 kg (93 lb) could
result in an air bag not deploying under the following conditions, for example:
ØLuggage or other items placed under the passenger seat or between the passenger
seat and center console that push up the passenger seat bottom.
Ø The passenger seat occupant sits in a manner such that the occupant's entire
weight is not placed on the seat sitting too close to the door.
Ø Any accessories which might decrease the total seated weight on the passenger
seat are attached to the passenger seat.
The passenger front and side air bags and seat belt pretensioner systems will
deactivate if the total seated weight on the passenger seat is close to 30 kg (66 lb)
and they will reactivate before the weight exceeds 42 kg (93 lb).
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Do not increase the total seated weight on the front passenger seat:When an infant or small child sits on the passenger seat, increasing the total seated
weight on the passenger seat from the total seated weight of approximately 30 kg
(66 lb) is dangerous. The passenger seat weight sensors will detect the increased
total seated weight, which could result in the unexpected deployment of the
passenger front and side air bags and seat belt pretensioner system in an accident
and may cause serious injury. Increasing the total seated weight on the passenger
seat beyond the total seated weight of approximately 30 kg (66 lb) could result in
the passenger front and side air bags and seat belt pretensioner system deployment
in an accident under the following conditions, for example:
ØThe total seated weight of the child with the child-restraint system on the
passenger seat is approximately 30 kg (66 lb) or more.
Ø Luggage or other items are placed on the seat with the child in the child-restraint
system.
Ø The seat is washed.
Ø Liquids are spilled on the seat.
Ø The passenger seat is moved backward, and it is pushed into luggage or other
items placed behind it.
Ø Luggage or other items are placed between the passenger seat and center
console.
Ø Any accessories which might increase the total seated weight on the passenger
seat are attached to the passenger seat.
The passenger front and side air bags and seat belt pretensioner systems will
deactivate if the total seated weight on the passenger seat is less than approximately
30 kg (66 lb) and they will reactivate when the weight exceeds approximately 42 kg
(93 lb).
CAUTION
Ø To assure proper deployment of the front air bag and to prevent damage to the
sensors in the seat bottoms:
ØDo not place sharp objects on the seat bottoms or leave heavy luggage on
them.
ØDo not spill any liquids on the seats or under the seats.
Ø To allow the sensors to function properly, always perform the following:
ØAdjust the seats as far back as possible and always sit upright against the
seatbacks with seat belts worn properly.
ØIf you place your child on the passenger seat, secure the child-restraint system
properly and slide the passenger seat as far back as possible.
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SRS Air Bags
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NOTElThe system requires about 10 seconds to alternate between turning the passenger front and side
air bags and seat belt pretensioner system on or off.
lThe passenger air bag deactivation indicator light may illuminate repeatedly if luggage or other
items are put on the passenger seat, or if the temperature of the vehicle's interior changes
suddenly.
lThe passenger air bag deactivation indicator light may illuminate for 10 seconds if the total
seated weight on the passenger seat changes.
lYou must deactivate the passenger air bag using the key (page 2-32) and consult an Authorized
Mazda Dealer.
Driver and passenger buckle switches
The buckle switches on the seat belts detect whether or not the seat belts are securely
fastened and further control the deployment of the air bags.
qHow the Side Air Bags Workí
When air bag crash sensors detect a side impact of greater than moderate force, an
electrical current is sent to the inflators.
Gases are produced to inflate the side air bags and after the inflation, the side air bags
quickly deflate. However, the side air bag system for the passenger is designed to only
deploy in accordance with the total seated weight on the passenger seat.
The side air bags will function only once. After that, the side air bags will not work again
and must be replaced. Only an Authorized Mazda Dealer can replace the systems.
The side air bag will deploy only on the
side the vehicle receives the force of the
impact.
qAir Bag Activation/Deactivation
NOTE
If the passenger seat weight sensors detect a total seated weight on the passenger seat is less than
approximately 42 kg (93 lb), the passenger front and side air bags and seat belt pretensioner may not
deploy (page 2-38).
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Front air bag activation
The front air bags will inflate if the
severity of impact is above the designed
threshold level.
lHitting a solid wall straight on at
greater than about 22 km/h (14 mph).
lHitting a curb, pavement edge or hard
object.
lLanding hard or the vehicle falling.
lFrontal impact within about a 30
degree range from head-on to the
vehicle.
lDriving into a big hole or hitting the far
side of a hole.
Limitations to front air bag activation
Depending on the severity of impact, the
front air bags may not inflate in the
following cases:
lImpacts involving trees or poles cause
severe cosmetic damage but may not
have enough stopping force to activate
the air bag.
lFrontal offset impact to the vehicle
may not provide the stopping force
necessary for air bag deployment.
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lRear-ending or running under a truck's
tail gate may not provide the stopping
force necessary for air bag deployment.
Non-activation of front air bags
Front air bags will not normally inflate in
the following cases:
lCollision from the rear.
lImpact to the side, but it may deploy
the side air bags.
lVehicle roll-over, may deploy the side
air bags but not the front air bags.
Side air bag activationí
The severity of impact above the designed
threshold level to one side of the vehicle
(driver or passenger side areas) will cause
a side air bag on that side to inflate, but it
will not normally deploy the front air
bags.
Limitations to side air bag activationí
Depending on the severity of impact, a
side air bag may not inflate in the
following cases:
lFrontal offset impact may not provide
enough side impact to deploy the side
air bags.
lSide impacts involving trees or poles
can cause severe cosmetic damage but
may not have enough impact force to
activate the side air bags.
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lVehicle roll-over may not provide
enough side force to deploy the side air
bags.
lSide impacts with two-wheeled
vehicles may not provide enough force
to deploy the side air bags.
Non-activation of side air bagí
A side air bag will not normally inflate in
the following cases:
lCollision from the rear.
lCollision from the front, but it may
deploy the front air bags.
qConstant Monitoring
The following components of the air bag
systems are monitored by a diagnostic
system:
lSAS unitlCrash sensorlAir bag moduleslSide crash sensorsí
lAir bag/Seat belt pretensioner system
warning light
lSeat belt pretensionerslRelated wiringlFront passenger air bag deactivation
switch
lDriver seat slide position sensorlFront passenger seat weight sensorslDriver and front passenger seat belt
buckle switches
The diagnostic module continuously
monitors the system's readiness. This
begins when the ignition switch is turned
to the ON position and continues while
the vehicle is being driven.
q Air Bag/Seat Belt Pretensioner
System Warning Light
If the air bag/seat belt pretensioner system
is working properly, the warning light
illuminates when the ignition switch is
turned to the ON position or after the
engine is cranked. The warning light turns
off after a specified period of time.
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SRS Air Bags
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A system malfunction is indicated if the
warning light constantly flashes,
constantly illuminates or does not
illuminate at all when the ignition switch
is turned to the ON position. If any of
these occur, consult an Authorized Mazda
Dealer as soon as possible. The system
may not work in an accident.
WARNING
Never tamper with the air bag/
pretensioner systems and always have
an Authorized Mazda Dealer perform
all servicing and repairs:Self-servicing or tampering with the
systems is dangerous. An air bag/
pretensioner could accidentally
activate or become disabled causing
serious injury or death.
qMaintenance
The air bag systems do not require regular
maintenance. But if any of the following
occurs, take your vehicle to an Authorized
Mazda Dealer as soon as possible:
lThe air bag system warning light
flashes.
lThe air bag system warning light
remains illuminated.
lThe air bag system warning light does
not illuminate when the ignition switch
is turned to the ON position.
lThe air bags have deployed.
lPassenger air bag deactivation
indicator light does not illuminate
when the ignition switch is turned to
the ON position or does not illuminate
as indicated in the chart or when you
manually deactivate the passenger air
bag with the key.
For more details about passenger air
bag deactivation, refer to:
lPassenger seat weight sensors (page
2-38)
lPassenger air bag deactivation
switch (page 2-32)
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WARNING
Do not operate a vehicle with damaged
air bag/seat belt pretensioner system
components:Expended or damaged air bag/seat
belt pretensioner system components
must be replaced after any collision
which caused them to deploy or
damage them. Only a trained
Authorized Mazda Dealer can fully
evaluate these systems to see that
they will work in any subsequent
accident. Driving with an expended
or damaged air bag or pretensioner
unit will not afford you the necessary
protection in the event of any
subsequent accident which could
result in serious injury or death.
Do not remove interior air bag parts: Removing any components such as
the seats, dashboard, the steering
wheel or parts containing air bag
parts or sensors is dangerous. These
parts contain essential air bag
components. The air bag could
accidentally activate and cause
serious injuries. Always have an
Authorized Mazda Dealer remove
these parts.
Dispose of the air bag properly: Improper disposal of an air bag or a
vehicle with live air bags in it can be
extremely dangerous. Unless all
safety procedures are followed, injury
can result. Ask an Authorized Mazda
Dealer how to safely dispose of an air
bag or how to scrap an air bag
equipped vehicle. NOTEIf it becomes necessary to have the components
or wiring system for the supplementary
restraint system modified to accommodate a
person with certain medical conditions in
accordance with a certified physician, contact
an Authorized Mazda Dealer, refer to
“
Customer Assistance (U.S.A.) ”(page 9-2).
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