brake sensor Acura RL 2009 Owner's Manual

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.
3132 79
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.
17 25
419
416
On models with Collision Mitigation Brake System
Seat Belt e-pretensioners
Additional Inf ormation About Your Seat Belts
24
2009 RL

This indicator comes on brief ly when
you turn the ignition switch to the
ON (II) position. If it comes on at
any other time, it indicates a
potential problem with your f ront
airbags. This indicator will also alert
you to a potential problem with your
side airbags, passenger’s side airbag
automatic cutoff system, side curtain
airbags, automatic seat belt
tensioners driver’s seat position
sensor, the f ront passenger’s weight
sensors, or, on models with ACC,
seat belt e-pretensioners. You will
also see a ‘‘CHECK AIRBAG
SYSTEM’’ message on the multi-
inf ormation display (see page ).
For more inf ormation, see page .
This indicator has two f unctions:
Itcomesonwhenyouturnthe
ignition switch to the ON (II)
position. It is a reminder to check
the parking brake. Driving with
the parking brake not f ully
released can damage the rear
brakes, axles, and tires.
If you drive without releasing the
parking brake, a beeper will sound,
and you will also see a ‘‘RELEASE
PARKING BRAKE’’ message on
the multi-information display (see
page ).
If it stays on after you have fully
released the parking brake while
the engine is running, or if it
comes on while driving, it can
indicate a problem in the brake system. You will also see a
‘‘BRAKE FLUID LOW’’ or
‘‘CHECK BRAKE SYSTEM’’
message on the multi-inf ormation
display. For more inf ormation, see
page .
This indicator comes on when you
turn the ignition switch to the ON
(II) position. If it comes on at any
other time, it indicates that the
passenger’s side airbag has
automatically shut of f . You will also
see a ‘‘PASSENGER SIDE AIRBAG
OFF’’ message on the multi-
inf ormation display (see page ).
For more inf ormation, see page .
1.
2.
35
7879
3579
508
Instrument Panel Indicators
Supplemental Restraint
System Indicator
Parking Brake and Brake System
Indicator
Side Airbag Of f Indicator
Inst rument s and Cont rols
63
U.S. Canada
U.S. Canada
2009 RL

This indicator comes on when the
security system is set. For more
inf ormation, see page .
This indicator normally comes on f or
a f ew seconds when you turn the
ignition switch to the ON (II)
position.
Itcomesonasareminderthatyou
have turned off the adaptive front
lighting system (AFS).
This indicator blinks when there is a
problem with the AFS system; you
will also see a ‘‘CHECK ADAPTIVE
FRONT LIGHTING SYSTEM’’
message on the multi-inf ormation
display (see page ). If this
happens, stop the vehicle in a saf e
place, turn the ignition switch to the
ACCESSORY (I) or the LOCK (0)
position, and restart the engine. If
the indicator does not go of f or
blinks again, take your vehicle to a
dealer to have it checked. For more
inf ormation, see page .
This indicator normally comes on f or
a f ew seconds when you turn the
ignition switch to the ON (II)
position. It also comes on as areminder that you have turned of f
the collision mitigation brake system
(CMBS).
The CMBS indicator also comes on
if dirt or other debris blocks the
radar sensor in the f ront grille. You
will also see a ‘‘CHECK CMBS
RADAR SENSOR’’ message on the
multi-inf ormation display. When you
clean the radar sensor, the indicator
should go of f the next time you turn
the ignition switch to the ON (II)
position.
If the indicator comes on at any
other time, there is a problem with
the CMBS. You will also see a
‘‘CHECK CMBS SYSTEM’’ message
on the multi-information display. If
this happens, take your vehicle to a
dealer, and have it checked. For
more information, see page .
When this indicator is on, the CMBS
is not working.
78
144 315
423
If equipped
If equipped
A daptive Front L ighting
System (A FS) IndicatorSecurity System Indicator
Collision Mitigation
Brake System (CMBS)
Indicator
Instrument Panel Indicators
Inst rument s and Cont rols
69
SECURITY SYSTEM INDICATOR
2009 RL

The radar sensor for ACC is shared
with the collision mitigation brake
system (CMBS). For more
inf ormation on the radar sensor, see
page . For more inf ormation on
CMBS, see page .
Adaptive cruise control (ACC)
consists of a radar sensor in the
f ront grille, the ACC buttons on the
steering wheel, and the ACC
f unctions of the multi-inf ormation
display.420 419
If equipped
A CC Components
A daptive Cruise Control (A CC)
Features
319
ACC INDICATOR
MULTI-INFORMATION
DISPLAY
ACC BUTTON
DISTANCE BUTTONSET/DECEL
BUTTON
RES/ACCEL BUTTON
CANCEL BUTTON
2009 RL

Adaptive cruise control (ACC) allows
you to maintain a set speed and keep
the vehicle ahead of you and your
vehicle at a saf e distance without
having to use the accelerator pedal
or the brake pedal.If the vehicle ahead of you slows
down suddenly or another vehicle
cuts in f ront of your vehicle, ACC
alerts you by sounding a beeper and
displaying a message on the multi-
inf ormation display.
TheACCradarsensorinthefront
grille can detect and monitor the
distance of a vehicle up to 328 f eet
(100 meters) ahead of your vehicle.
For more inf ormation on the radar
sensor, see page .Do not use ACC under these
conditions:
In poor visibility.
In heavy traffic.
When you must slow down and
speed up repeatedly.
On winding roads.
When you enter a toll gate,
interchange, service area, parking
area, etc. In these areas, there is
no vehicle ahead of you, and ACC
would still try to accelerate to your
set speed.
In bad weather (rain, f og, snow,
etc.)
On a slippery road (f or example a
road covered with ice or snow).
As with any system, there are limits
to ACC. Inappropriate use of ACC
can result in a serious accident. Use
the brake pedal whenever necessary,
and always keep a safe distance
between your vehicle and other
vehicles.
When the vehicle ahead of you slows
down or speeds up, ACC senses the
change in distance and compensates
by accelerating or braking your
vehicle to reach the cruising speed
you previously set. The distance
between vehicles is based on your
speed: the f aster you go, the longer
the distance will be; the slower you
go, the shorter it will be.
420
Overview
Important Saf ety Precautions
A daptive Cruise Control (A CC)
320
2009 RL

Message Message DescriptionDescription
Apply the brakes immediately.
Your vehicle is too close to the vehicle
ahead of it.
You will hear a continuous beep.
ACC needs to be checked.
Have your vehicle checked by a
dealer.
ACC has automatically cancelled
because its radar sensor in the f ront
grill is dirty.
You will hear a beep about 1 second.
ACC has automatically cancelled
because of bad weather or other
conditions.
You will hear a beep about 1 second.
A daptive Cruise Control (A CC)
332
2009 RL

The CMBS does not activate if the
speed dif f erence between the two
vehicles is less than 10 mph (15
km/h). CMBS may also not
activate if you turn the steering
wheel to avoid the collision.
When the CMBS activates, the brake
lights also come on.
The collision mitigation brake
system (CMBS) can assist you when
there is a possibility of your vehicle
hitting the vehicle in f ront of you. It
is designed to reduce the speed of
your vehicle before an unavoidable
collision occurs and, if possible, to
alert you to a potential collision while
thereistimetopreventit.Hereisa
brief description of what the CMBS
can do:
When your speed is above 10 mph
(15 km/h), the CMBS radar
sensor in the f ront grille can sense
a vehicle ahead of you. When your
vehicle gets too close to the
vehicle ahead of you, the system
mayactivateawarningbeep,
causing automatic application of
the brakes, and causing the
e-pretensioners to tighten the
f ront seat belts (see page ). The CMBS consists of a radar
sensor in the f ront grille, a brake
actuator in the engine compartment,
an indicator on the instrument panel,
seat belt e-pretensioners on the f ront
seats,andanon/off switchonthe
dashboard.
24
If equipped
Overview
Collision Mitigation Brake System (CMBS)
Driving
419
RADAR SENSOR
BRAKE
ACTUATOR SEAT BELT
e-PRETENS
IONERS
2009 RL

The radar sensor is located under
the Acura emblem in the f ront grille.
If the radar sensor cover is covered
with mud, dirt, dead leaves, wet
snow, etc., or if you put a sticker on
it, the CMBS will automatically shut
of f , and the CMBS indicator on the
instrument panel will come on. You
will also see a ‘‘CHECK CMBS
RADAR SENSOR’’ message on the
multi-inf ormation display f or about 5
seconds.Always keep the radar sensor cover
clean. If it gets dirty, clean it with
water or a mild detergent. Never use
chemical solvents or polishing
powder.Do not allow anything to impact the
radarsensorortheradarsensor
cover. If either of these parts
receives a strong impact, turn off the
system by pressing the CMBS of f
switch, and have your vehicle
checked by a dealer. If the f ront
grille ever needs to be repaired,
consult a dealer f irst.
If the radar sensor cover or the radar
sensor ever needs to be removed,
take your vehicle to a dealer.
There are three bolts on the sides of
the radar sensor. Do not tamper with
these bolts, or you may cause the
system to malf unction.
Radar Sensor
Collision Mitigation Brake System (CMBS)
420
RADAR SENSOR COVER
BOLTS
(Do not tamper)
2009 RL

The radar sensor may not always
scan as intended. Here are two
examples:Thetiresarenotcorrectly
maintained. Always make sure the
tire pressures are correct (see
page ), and that the tires are
the correct size and in good
condition (see Tires on page ). Your vehicle is tilted because of a
heavy load in the rear or from
modif ications to the suspension.
Do not overload your vehicle (see
Carrying Cargo on page ), and
do not make any modif ications to
the suspension (see Accessories
and Modif ications on page ). 395
393
480 480
Collision Mitigation Brake System (CMBS)
Driving
421
When the CMBS is on, the radar sensor
constantly scans f or vehicles ahead of
you. This means that driving on a road
with a f ew or no vehicles could cause a
CHECK CMBS RADAR SENSOR
message to appear on the multi-
inf ormation display. This is normal
and not a cause f or concern.
2009 RL