brake Acura RL 2009 Service Manual

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

If the system senses a likely collision
with a vehicle or object ahead of you,
it alerts you with an audible and a
visual alarm.The audible alarm is a constant
beeping sound; the visual alert is an
amber colored BRAKE message that
f lashes on the multi-inf ormation
display. If these alarms come on,
take the appropriate means to
prevent a collision (apply the brakes,
change lanes, etc.).To turn the CMBS off, press the
CMBS OFF switch on the dashboard
f or about 1 second. When you do this,
a beeper sounds, a CMBS indicator
on the instrument panel comes on,
and a CMBS OFF message appears
on the multi-information display. To
turn the system back on, press the
switch again for about 1 second.
Collision Alarm CMBS OFF Switch
Collision Mitigation Brake System (CMBS)
422
CMBS OFF SWITCH
2009 RL

The CMBS will automatically
recover when these conditions are
improved.
Any of the conditions below can
cause the CMBS to shut of f . When
the system shuts off, the CMBS
indicator in the instrument panel
comes on, and a CHECK CMBS
SYSTEM message appears on the
multi-inf ormation display f or about 5
seconds.
An abnormal tire condition is
detected (wrong tire size, f lat tire,
etc.).
Extended of f -road or mountainous
driving.
Driving your vehicle with the
parking brake applied.
Driving your vehicle in bad
weather(rain,fog,snow,etc.).
A dirty emblem on the f ront grille.
When you turn the ignition switch to
the ON (II) position, the CMBS is
turned on if it was on previously.
Automatic Shut Of f
Collision Mitigation Brake System (CMBS)
Driving
423
2009 RL

The CMBS indicator normally comes
on under these conditions:When you manually turn of f the
system.
When the system shuts off
automatically.
When you drive in bad weather
(rain, snow, f og, etc.). When the VSA system indicator
comes on (see page ).
When you turn the ignition switch
to the ON (II) position, the CMBS
indicator should come on f or a f ew
seconds, then go of f . If the
indicator comes on at any other
time and a CHECK CMBS
SYSTEM message appears on the
multi-inf ormation display, there is
a problem with the CMBS. You
can still drive your vehicle, but
CMBS will not be operating. Have
your vehicle checked by a dealer.
If anything covers the f ront grille
(dirt, mud, dry leaves, wet snow,
etc.).
This indicator comes on f or several
seconds when you turn the ignition
switch to the ON (II) position. It also
comesonandstaysonwhenyou
turn the CMBS off by pressing the
CMBS OFF switch.
To turn the CMBS back on, make
sure the vehicle is stopped and the
ignition switch is in the ON (II)
position, then press the CMBS OFF
switch f or about 1 second. 435
CMBS Indicator
Collision Mitigation Brake System (CMBS)
424
CMBS INDICATOR
2009 RL

A vehicle cuts in f ront of you and
brakes suddenly.
When you accelerate rapidly and
approach the vehicle ahead of you
at high speed.Driving in heavy, stop-and-go
traffic.
The vehicle ahead of you is a
motorcycle or other small vehicle.
Immediately af ter you drive of f .
The CMBS may not activate under
some conditions. Here are a f ew
examples:
The distance between your vehicle
and the vehicle ahead of you is too
short.
A vehicle cuts in f ront of you at a
slow speed.
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Limitations
Collision Mitigation Brake System (CMBS)
Driving
425
YOUR VEHICLE
YOUR VEHICLE
2009 RL

Even with little or no chance of a
collision, the CMBS may activate
under these conditions:
A vehicle suddenly crosses in f ront
of you. When you approach or pass a
vehicle ahead of you that is
turning lef t or right in an
intersection.
When you change lanes quickly,
then overtake the vehicle ahead of
you.
Collision Mitigation Brake System (CMBS)
426
YOUR VEHICLE
YOUR VEHICLE
The CMBS is not designed to detect
pedestrians.
2009 RL

When you pass a low bridge at
high speed.When you approach train tracks at
the bottom of a hill and you do not
apply the brakes.Because of the road condition
(curved, winding, etc.) or the state of
your vehicle (turning angle, lane
position, etc.), CMBS can sometimes
mistake a stationary object (light
pole, traf f ic sign, etc.) as a vehicle
ahead of you and temporarily
operate. This is normal.
When you go over a sharp-edged
speed bump at high speed.
When you go over areas of
construction on the road surface.
Collision Mitigation Brake System (CMBS)
Driving
427
LOW BRIDGE
RAILS YOUR VEHICLE
SIGN, POLE, etc.
2009 RL

As required by the FCC:This device complies with Part 15 of theFCC rules. Operation is subject to thef ollowing two conditions: (1) This devicemay not cause harmf ul interf erence, and(2) this device must accept anyinterf erence received, includinginterf erence that may cause undesiredoperation.
Changes or modif ications not expresslyapproved by the party responsible f orcompliance could void the user’sauthority to operate the equipment.
This device complies with IndustryCanada Standard RSS-210.Operation is subject to the f ollowing twoconditions: (1) this device may not causeinterf erence, and (2) this device mustaccept any interf erence that may causeundesired operation of the device.
Themainpurposeof theCMBSisto
reduce the severity of injuries
caused by an unavoidable collision.
While the CMBS may help to alert
you and minimize the severity of a
collision, it may not activate in every
dangerous situation.
Even with the CMBS, it is still your
responsibility to operate the brake
pedal and steering wheel
appropriately, according to the
driving conditions.
Important Saf ety Reminder
Collision Mitigation Brake System (CMBS)
428
2009 RL

The vehicle stability assist (VSA)
system helps to stabilize the vehicle
during cornering if the vehicle turns
more or less than desired. It also
assists you in maintaining traction
while accelerating on loose or
slippery road surf aces. It does this
by regulating the engine’s output and
by selectively applying the brakes.When VSA activates, you will see the
VSA activation indicator blink (see
page ).
If this indicator comes on while
driving, pull to the side of the road
when it is saf e, and turn of f the
engine. Reset the system by
restarting the engine. If the VSA
system indicator stays on or comes
back on while driving, have the VSA
system inspected by your dealer.
When VSA activates, you may notice
that the engine does not respond to
the accelerator in the same way it
does at other times. There may also
be some noise f rom the VSA
hydraulic system. You will also see
the VSA activation indicator blink.
The VSA system cannot enhance the
vehicle’s driving stability in all
situations and does not control your
vehicle’s entire braking system. It is
still your responsibility to drive and
corner at reasonable speeds and to
leave a sufficient margin of safety. If the indicator does not come on
when the ignition switch is turned to
the ON (II) position, there may be a
problem with the VSA system. Have
your dealer inspect your vehicle as
soon as possible (see page ).
When the VSA system indicator
comes on, you will also see a
‘‘CHECK VSA SYSTEM’’ message
on the multi-information display.
Without VSA, your vehicle still has
normal braking and cornering ability,
but it does not have VSA traction and
stability enhancement.
The main f unction of the
VSA system is generally known as
Electronic Stability Control (ESC).
The system also includes a traction
control f unction. 65
65
VSA A ctivation Indicator
VSA System Indicator
Vehicle Stability A ssist (VSA), aka Electronic Stability Control (ESC), System
Driving
435
NOTE:
2009 RL

Always use saf ety chains when you
tow a trailer. Make sure the chains
are secured to the trailer and hitch,
and that they cross under the tongue
and can catch the trailer if it
becomes unhitched. Leave enough
slack to allow the trailer to turn
corners easily, but do not let the
chains drag on the ground.If you choose electric brakes, be
sure they are electronically actuated.
Do not attempt to tap into your
vehicle’s hydraulic system. No
matter how successf ul it may seem,
any attempt to attach trailer brakes
to your vehicle’s hydraulic system
will lower braking ef f ectiveness and
create a potential hazard.
Seeyourtrailerdealerorrental
agency f or more inf ormation on
installing electric brakes.Trailer lights and equipment must
comply with f ederal, state/province,
and local regulations. Check with
your local trailer sales or rental
agencies f or the requirements in the
area where you plan to tow, and use
only equipment designed f or your
vehicle.
Since lighting and wiring vary by
trailer type and brand, you should
have a qualified technician install a
suitable connector between the
vehicle and the trailer. Improper
equipment or installation can cause
damage to your vehicle’s electrical
system and af f ect your vehicle
warranty.
There are two common types of
trailer brakes: surge and electric.
Surge brakes are common f or boat
trailers, since the brakes will get wet.
CONT INUED
Saf et y Chains T railer L ight s
Trailer Brakes
Towing a Trailer
Driving
439
2009 RL