Acura MDX 2009 Owner's Guide

How Your Front Airbags WorkIf you ever have a moderate to severe
frontal collision, sensors will detect
the vehicle's rapid deceleration.
If the rate of deceleration is high
enough, the control unit will instantly
inflate the driver's and front
passenger's airbags, at the time and
with the force needed.During a frontal crash, your seat belt
restrains your lower body and torso,
and the front airbag helps protect
your head and chest.
Although both airbags normally
inflate within a split second of each
other, it is possible for only one
airbag to deploy.
This can happen if the severity of a
collision is at the margin, or
threshold, that determines whether
or not the airbags will deploy. In
such cases, the seat belt will provide
sufficient protection, and the
supplemental protection offered by
the airbag would be minimal.
Only the driver's airbag can deploy if
there is no passenger in the front
seat, or if the advanced airbag
system has turned the passenger's
airbag off (see page34).
After inflating, the front airbags
immediately deflate, so they won't
interfere with the driver's visibility,
or the ability to steer or operate other
controls.
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The total time for inflation and
deflation is one-tenth of a second, so
fast that most occupants are not
aware that the airbags deployed until
they see them lying in their laps.
After a crash, you may see what
looks like smoke. This is actually
powder from the airbag's surface.
Although the powder is not harmful,
people with respiratory problems
may experience some temporary
discomfort. If this occurs, get out of
the vehicle as soon as it is safe to do
so.
Dual-Stage AirbagsYour front airbags are dual-stage
airbags. This means they have two
inflation stages that can be ignited
sequentially or simultaneously,
depending on crash severity.
In a
more severe
crash, both stages
will ignite simultaneously to provide
the quickest and greatest protection.
In a
less severe
crash, one stage will
ignite first, then the second stage will
ignite a split second later. This
provides longer airbag inflation time
with a little less force.
Dual-Threshold AirbagsYour front airbags are also dual-
threshold airbags. Airbags with this
feature have two deployment
thresholds that depend on whether
sensors detect the occupant is
wearing a seat belt or not.
If the occupant's belt is
not latched,
the airbag will deploy at a slightly
lower threshold, because the
occupant would need extra
protection.
If the occupant's belt is
latched,
the
airbag will inflate at a slightly higher
threshold, when the airbag would be
needed to supplement the protection
provided by the seat belt.
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2009 MDX

Advanced AirbagsYour front airbags are also advanced
airbags. The main purpose of this
feature is to help prevent airbag-
caused injuries to short drivers and
children who ride in front.
For both advanced airbags to work
properly:●Occupants must sit upright and
wear their seat belts properly.●Do not spill any liquids on or
under the seats, cover the sensors,
or put any objects or metal items
under the front seats.●Second-row passengers should not
put their feet under the front seats.
Failure to follow these instructions
could damage the sensors or prevent
them from working properly.
The driver's advanced front airbag
system includes a seat position
sensor under the seat. If the seat is
too far forward, the airbag will inflate
with less force, regardless of the
severity of the impact.
If there is a problem with the sensor,
the SRS indicator will come on, and
the airbag will inflate in the normal
manner regardless of the driver's
seating position.
The passenger's advanced front
airbag system has weight sensors
under the seat. Although Acura does
not encourage carrying an infant or
small child in front, if the sensors
detect the weight of an infant or
small child (up to about 65 lbs or 29
kg), the system will automatically
turn the passenger's front airbag off.
DRIVER'S
SEAT
POSITION
SENSOR
PASSENGER'S
SEAT
WEIGHT
SENSOR
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Be aware that objects placed on the
passenger's seat can also cause the
airbag to be turned off.
When the airbag is turned off, a
‘‘passenger airbag off ’’indicator in
the center of the dashboard comes
on (see page34).
If the weight sensors detect there is
no passenger in the front seat, the
airbag will be off. However, the
passenger airbag off indicator will
not come on.
To ensure that the passenger's
advanced front airbag system will
work properly,
do not do anything
that would increase or decrease the weight on the front passenger's seat.
This includes:●A second-row passenger pushing
or pulling on the back of the front
passenger's seat.
●Moving the front seat forcibly back
against cargo on the seat or floor
behind it.●Hanging heavy items on the front
passenger seat, or placing heavy
items in the seat-back pocket.●Moving the front passenger's seat
or seat-back forcibly back against
the folded right-side second-row
seat.
Also, make sure the floor mat behind
the front passenger's seat is hooked
to the floor mat anchor (see page
410).If it is not, the mat may
interfere with the proper operation of
the sensors and operation of the seat. How Your Side Airbags Work
If you ever have a moderate to severe
side impact, sensors will detect rapid
acceleration and signal the control
unit to instantly inflate either the
driver's or the passenger's side
airbag and activate the seat belt
tensioner on the affected side.
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Only one airbag will deploy during a
side impact. If the impact is on the
passenger's side, the passenger's
side airbag will deploy even if there
is no passenger.
To get the best protection from the
side airbags, front seat occupants
should wear their seat belts and sit
upright and well back in their seats.
Side Airbag Cutoff SystemYour vehicle has a side airbag cutoff
system designed primarily to protect
a child riding in the front passenger's
seat.
Although Acura does not encourage
children to ride in front, if the
position sensors detect a child has
leaned into the side airbag's
deployment path, the airbag will shut
off.
The side airbag may also shut off if a
short adult leans sideways, or a
larger adult slouches and leans
sideways into the airbag's
deployment path.
Objects placed on the front
passenger seat can also cause the
side airbag to be shut off.If the side airbag off indicator comes
on (see page33),have the passenger
sit upright. Once the passenger is
out of the airbag's deployment path,
the system will turn the airbag back
on, and the indicator will go out.
There will be some delay between
the moment the passenger moves
into or out of the airbag deployment
path and when the indicator comes
on or goes off.
A front seat passenger should not
use a cushion or other object as a
backrest. It may prevent the cutoff
system from working properly.
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How Your Side Curtain Airbags
WorkIn a Side ImpactIn a moderate to severe side impact,
sensors will detect rapid acceleration
and signal the control unit to
instantly inflate the side curtain
airbag and activate the seat belt
tensioner on the driver's or the
passenger's side of the vehicle.If the impact is on the passenger's
side, the passenger's side curtain
airbag will inflate even if there are no
occupants on that side of the vehicle.
In a RolloverIf the rollover sensor detects your
vehicle is about to roll over, it signals
the control unit, which immediately
deploys both side curtain airbags and
activates both front seat belt
tensioners.
The airbag on the passenger's side
will deploy, and the seat belt
tensioner will activate, even if there
are no passengers on that side of the
vehicle.
To get the best protection from the
side curtain airbags, occupants
should wear their seat belts and sit
upright and well back in their seats.
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2009 MDX

How the SRS Indicator Works
The SRS indicator alerts
you to a potential problem
with your airbags or seat belt
tensioners.
When you turn the ignition switch to
the ON (II) position, this indicator
comes on briefly then goes off. This
tells you the system is working
properly.
If the indicator comes on at any other
time, or does not come on at all, you
should have the system checked by
your dealer. For example:
●If the SRS indicator does not come
on after you turn the ignition
switch to the ON (II) position.●If the indicator stays on after the
engine starts.●If the indicator comes on or flashes
on and off while you drive.
You will also see a ‘‘CHECK AIRBAG
SYSTEM ’’message on the multi-
information display (see page81). If you see any of these indications,
the airbags and seat belt tensioners
may not work properly when you
need them.
Ignoring the SRS indicator can
result in serious injury or death
if the airbag systems or
tensioners do not work
properly.
Have your vehicle checked by a
dealer as soon as possible if
the SRS indicator alerts you to
a possible problem.
How the Side Airbag Off Indicator
Works
U.S. Canada
This indicator
alerts you that the
passenger's side airbag has been
automatically shut off. It does
not
mean there is a problem with your
side airbags.
When you turn the ignition switch to
the ON (II) position, the indicator
should come on briefly and then go
out (see page66).If it does not come
on, stays on, or comes on while
driving without a passenger in the
front seat, you will also see a
‘‘ PASSENGER SIDE AIRBAG OFF ’’
message on the multi-information
display. Have the system checked
(see page81).
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How the Passenger Airbag Off
Indicator WorksThis indicator alerts you that the
passenger's front airbag has been
shut off because weight sensors
detect about 65 lbs (29 kg) or less
(the weight of an infant or small
child) on the front passenger's seat.
It does
not mean
there is a problem
with the airbag. Be aware that objects placed on the
front seat can cause the indicator to
come on.
If no weight is detected on the front
seat, the airbag will be automatically
shut off. However, the indicator will
not come on.
The passenger airbag off indicator
may come on and off repeatedly if the
total weight on the seat is near the
airbag cutoff threshold.
If an adult or teenage passenger is
riding in front, move the seat as far to
the rear as possible, and have the
passenger sit upright and wear the
seat belt properly.
If the indicator comes on with no
front seat passenger and no objects
on the seat, or with an adult riding
there, something may be interfering
with the weight sensors. Look for
and remove:
●Any items under the front
passenger's seat.●Any object(s) hanging on the seat
or in the seat-back pocket.●Any object(s), such as a folded-
down back seat, that are touching
the rear of the seat-back.
If no obstructions are found, have
your vehicle checked by a dealer as
soon as possible.
PASSENGER AIRBAG OFF INDICATOR U.S.CanadaAdditional Information About Your Airbags3408/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
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Airbag Service
Your airbag systems are virtually
maintenance free, and there are no
parts you can safely service.
However, you must have your
vehicle serviced if:●An airbag ever inflates.
Any airbag
that has deployed must be
replaced along with the control
unit and other related parts. Any
seat belt tensioner that activates
must also be replaced.
Do not try to remove or replace
any airbag by yourself. This must
be done by an authorized dealer or
a knowledgeable body shop.
●The SRS indicator alerts you to a
problem.
Take your vehicle to an
authorized dealer as soon as
possible. If you ignore this
indication, your airbags may not
operate properly.
●If your vehicle has a moderate to
severe impact.
Even if your airbags
do not inflate, your dealer should
inspect the driver's seat position
sensor, the front passenger's
weight sensors, the front seat belt
tensioners, and all seat belts and
their anchors worn during a crash
to make sure they are operating
properly. Additional Safety Precautions
●Do not attempt to deactivate your
airbags.
Together, airbags and seat
belts provide the best protection.
●Do not tamper with airbag components or wiring for any
reason.
Tampering could cause
the airbags to deploy, possibly
causing very serious injury.
●Do not expose the front
passenger's seat-back to liquid.
If
water or another liquid soaks into
a seat-back, it can prevent the side
airbag cutoff system from working
properly.
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●Do not remove or modify a frontseat without consulting your
dealer.
This could make the
driver's seat position sensor or the
front passenger's weight sensors
ineffective. If it is necessary to
remove or modify a front seat to
accommodate a person with
disabilities, first contact Acura
Client Services at 800-382-2238.
●Do not cover or replace front seat- back covers without consulting
your dealer.
Improperly replacing
or covering front seat-back covers
can prevent your side airbags from
inflating during a side impact.
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2009 MDX