2009 Acura RL sensor

CONT INUED
Your seat belt system includes lap/
shoulder belts in all seating positions.
The f ront seat belts are also
equipped with automatic seat belt
tensioners and, on models with
collision mitigation brake system
(CMBS), seat belt e-pretensioners.The seat belt system
includes an indicator on the
instrument panel and a beeper to
remind you and your passengers to
f asten your seat belts.
This system monitors the f ront seat
belts. If you turn the ignition switch
to the ON (II) position bef ore your
seat belt is f astened, the beeper will
sound and the indicator will f lash. If
your seat belt is not f astened bef ore
the beeper stops, the indicator will
stop f lashing but remain on.
If a f ront passenger does not f asten
their seat belt, the indicator will
come on about 6 seconds af ter the
ignition switch is turned to the ON
(II) position. You will also see a ‘‘FASTEN SEAT
BELT’’ or ‘‘FASTEN PASSENGER
SEAT BELT’’ message on the multi-
inf ormation display (see page ).
When no one is sitting in the f ront
passenger’s seat, or a child or small
adult is riding there, the indicator
should not come on and the beeper
should not sound.
This system uses the same sensors
as the front airbags to monitor
whether the f ront seat belts are
latched or unlatched, and how much
weight is on the f ront passenger’s
seat (see pages and ). If either the driver or a f ront
passenger does not f asten their seat
belt while driving, the beeper will
sound and the indicator will f lash
again at regular intervals.
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Seat Belt System Components
Additional Inf ormation About Your Seat Belts
Driver and Passenger Saf ety
21
2009 RL

The e-pretensioners do not activate
when the seat belts are not worn or
when the vehicle stability assist
(VSA) of f indicator on the
instrument panel is on.
For added saf ety, the f ront seat belts
are equipped with e-pretensioners
that work in combination with the
collision mitigation brake system
(CMBS) (see page ) and the
brake pedal assist f unction (see page ). If your vehicle gets too close to the
vehicle ahead of it in your lane, the
driver’s e-pretensioner slightly
retracts the seat belt to alert the
driver of the approaching vehicle. If
a collision with the vehicle in f ront of
you is likely, the e-pretensioners on
both front seats retract the seat belts
with enough f orce to properly
restrain you and your f ront
passenger. After they activate, the
e-pretensioners release the retracted
seat belts.
To get the f ull benef it of the
e-pretensioners, you and your f ront
passenger must sit normally in your
seats and wear your seat belts
properly (see page ).
In addition, the f ront passenger’s
e-pretensioner does not activate
when the passenger’s airbag is
automatically turned off because the
weight sensor detects a child in the
f ront passenger’s seat.
If the automatic seat belt tensioners
are activated by a collision, both
f ront seat belts and all related
components must be
replaced (see page ). If only the
e-pretensioners were activated, no
components need to be replaced.
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419
416
On models with Collision Mitigation Brake System
Seat Belt e-pretensioners
Additional Inf ormation About Your Seat Belts
24
2009 RL

Î
Î
:On models with CMBS
A irbag System Components
Additional Inf ormation About Your Airbags
26
(1)
(2)
(3) (4)
(5) (8)
(7)
(6) (4)(5)
(10)
(9)
(9)
(6) Driver’s Seat Position Sensor
(7) Front Passenger’s Seat Weight Sensors
(8) Passenger Airbag Off Indicator
(9) Side Impact Sensors (First)
(10) Occupant Detection System (ODS) Sensors (1) Driver’s Airbag
(2) Front Passenger’s Airbag
(3) Control Unit
(4) Front Seat Belt Tensioners/
Seat Belt e-pretensioners
(5) Side Airbags
2009 RL

Î
ÎYour airbag system includes:
Two side airbags, one f or the
driver and one f or a f ront
passenger. The airbags are stored
in the outer edges of the seat-
backs. Both are marked ‘‘SIDE
AIRBAG’’ (see page ).
Two side curtain airbags, one f or
each side of the vehicle. The
airbags are stored in the ceiling,
above the side windows. The front
and rear pillars are marked ‘‘SIDE
CURTAIN AIRBAG’’ (see page ).
Two SRS (supplemental restraint
system) f ront airbags. The driver’s
airbag is stored in the center of
the steering wheel; the f ront
passenger’sairbagisstoredinthe
dashboard. Both are marked ‘‘SRS
AIRBAG’’ (see page ).
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: On models with CMBSCONT INUED
Additional Inf ormation About Your Airbags
Driver and Passenger Saf ety
27
(15)
(14)
(13)
(11) (13)
(12)
(11) e-pretensioner Control Unit
(12) Front Impact Sensors
(13) Side Impact Sensors (Second)
(14) Rear Safing Sensor
(15) Side Curtain Airbags
2009 RL

Automatic front seat belt
tensioners (see page ).
Sensors that can detect a
moderate to severe front impact or
side impact.
Sensors that can detect whether a
child is in the passenger’s side
airbag path and signal the control
unit to turn the airbag of f (see
page ).
On models with CMBS, f ront seat
belt e-pretensioners (see page ).An indicator on the instrument
panel that alerts you to a possible
problem with your airbags,
sensors, seat belt tensioners (see
page ), or, on models with
CMBS, seat belt e-pretensioners
(see page ).
An indicator on the instrument
panel that alerts you that the
passenger’s side airbag has been
turned of f (see page ).
An indicator on the dashboard that
alerts you that the passenger’s
f ront airbag has been turned of f
(see page ).
Emergency backup power in case
your vehicle’s electrical system is
disconnected in a crash.
A driver’s seat position sensor that
monitors the distance of the seat
from the front airbag. If the seat is
too f ar f orward, the airbag will
inf late with less f orce (see page
).
A sophisticated electronic system
that continually monitors and
records inf ormation about the
sensors, the control unit, the
airbag activators, the seat belt
tensioners, and driver and f ront
passenger seat belt use when the
ignition switch is in the ON (II)
position.
Sensors that can detect whether
the driver’s seat belt and the f ront
passenger’s seat belt are latched
or unlatched (see page ). Weight sensors that monitor the
weight on the f ront passenger’s
seat. If the weight is about 65 lbs
(29 kg) or less (the weight of an
inf ant or small child), the
passenger’s f ront airbag will be
turned of f (see page ).
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35
31
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Additional Inf ormation About Your Airbags
28
2009 RL

CONT INUED
Af ter inf lating, the f ront airbags will
immediately def late, so they won’t
interf ere with the driver’s visibility,
or the ability to steer or operate
other controls.
The total time for inflation and
def lation is one-tenth of a second, so
f ast that most occupants are not
aware that the airbags deployed until
they see them lying in their laps.
During a f rontal crash, your seat belt
restrains your lower body and torso,
and the f ront airbag helps protect
your head and chest.
Although both airbags normally
inf late within a split second of each
other, it is possible f or 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
suf f icient protection, and the
supplemental protection of f ered by
the airbag would be minimal.
If you ever have a moderate to
severe f rontal collision, sensors will
detect the vehicle’s rapid
deceleration.
If the rate of deceleration is high
enough, the control unit will instantly
inf late the driver’s and f ront
passenger’s airbags, at the time and
with the f orce needed. Only the driver’s airbag will deploy if
there is no passenger in the f ront
seat, or if the advanced airbag
system has turned the passenger’s
airbag off (see page ).
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Additional Inf ormation About Your Airbags
How Your Front Airbags Work
Driver and Passenger Saf ety
29
2009 RL

Your f ront airbags are also dual-
threshold airbags. Airbags with this
f eature 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 ,
the airbag will deploy at a slightly
lower threshold, because the
occupant would need extra
protection.
Your f ront airbags are dual-stage
airbags. This means they have two
inf lation stages that can be ignited
sequentially or simultaneously,
depending on crash severity.
In a crash, both stages
will ignite simultaneously to provide
the quickest and greatest protection.
In a crash, one stage will
ignite first, then the second stage
will ignite a split second later. This
provides longer airbag inf lation time
with a little less force.
After a crash, you may see what
looks like smoke. This is actually
powder f rom the airbag’s surf ace.
Although the powder is not harmf ul,
people with respiratory problems
mayexperiencesometemporary
discomf ort. If this occurs, get out of
the vehicle as soon as it is saf e to do
so.
If the occupant’s belt is , the
airbag will inf late at a slightly higher
threshold, when the airbag would be
needed to supplement the protection
provided by the seat belt.
Additional Inf ormation About Your Airbags
Dual-T hreshold A irbags
not lat ched
Dual-Stage A irbags
more severeless severe latched
30
2009 RL

CONT INUED
Your f ront 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 f ront.
For both advanced airbags to work
properly:Occupants must sit upright and
wear their seat belts properly.
Back-seat passengers should not
put their f eet under the f ront seats.
Failure to f ollow these instructions
could damage the sensors or prevent
them f rom 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
inf late with less f orce, 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 inf late in the normal
manner regardless of the driver’s
seating position.The passenger’s advanced f ront
airbag system has weight sensors
under the seat. Although Acura does
not encourage carrying an inf ant or
small child in f ront, if the sensors
detect the weight of an inf ant or
small child (up to about 65 lbs or 29
kg), the system will automatically
turn the passenger’s front airbag off.
Do not spill any liquids on or
under the seats, cover the sensors,
or put any objects or metal items
under the f ront seats.
Be aware that objects placed on the
passenger’s seat can also cause the
airbag to be turned off.
Additional Inf ormation About Your Airbags
Advanced Airbags
Driver and Passenger Saf ety
31
DRIVER’S
SEAT
POSITION
SENSORPASSENGER’S
SEAT WEIGHT
SENSOR
2009 RL