brake ACURA ZDX 2010 Service Manual

Your vehicle is equipped with disc
brakes at all four wheels. A power
assist helps reduce the effort needed
on the brake pedal. The emergency
brake assist system increases the
stopping force when you depress the
brake pedal hard in an emergency
situation. The anti-lock brake system
(ABS) helps you retain steering
control when braking very hard.
Resting your foot on the pedal keeps
the brakes applied lightly, builds up
heat, and reduces their effectiveness
and reduces brake pad life. In
addition, fuel economy can be
reduced. It also keeps your brake
lights on all the time, confusing
drivers behind you.Constant application of the brakes
when going down a long hill builds
up heat and reduces their
effectiveness. Use the engine to
assist the brakes by taking your foot
off the accelerator and downshifting
to a lower gear.
Check the brakes after driving
through deep water. Apply the
brakes moderately to see if they feel
normal. If not, apply them gently and
frequently until they do. Be extra
cautious in your driving.
Braking System Design
The hydraulic system that operates
the brakes has two separate circuits.
Each circuit works diagonally across
the vehicle (the left-front brake is
connected with the right-rear brake,
etc.). If one circuit should develop a
problem, you will still have braking
at two wheels.
Brake Wear Indicators
All four brakes have audible brake
wear indicators.
If the brake pads need replacing, you
will hear a distinctive, metallic
screeching sound when you apply
the brake pedal. If you do not have
the brake pads replaced, they will
screech all the time. It is normal for
the brakes to occasionally squeal or
squeak when you apply them.
Braking System
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The anti-lock brake system (ABS)
helps prevent the wheels from
locking up, and helps you retain
steering control by pumping the
brakes rapidly, much faster than a
person can do it.
The electronic brake distribution
(EBD) system, which is part of the
ABS, also balances the front-to-rear
braking distribution according to
vehicle loading.You should never pump the brake pedal.Let the ABS work for you by always
keeping firm, steady pressure on the
brake pedal. This is sometimes
referred to as‘‘stomp and steer. ’’You will feel a pulsation in the brake
pedal when the ABS activates, and
may hear some noise. This is normal:
it is the ABS rapidly pumping the
brakes. On dry pavement, you will
need to press on the brake pedal
very hard before the ABS activates.
However, you may feel the ABS
activate immediately if you are trying
to stop on snow or ice.
ABS Indicator
If this indicator comes on, the anti-
lock function of the braking system
has shut down. The brakes still work
like a conventional system, but
without anti-lock. You should have
your dealer inspect your vehicle as
soon as possible.
You will also see a ‘‘CHECK ABS
SYSTEM ’’message on the multi-
information display (see page 90).
If the indicator comes on while
driving, test the brakes as instructed
on page 594.
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If the ABS indicator and the brake
system indicator come on together,
and the parking brake is fully
released, the EBD system may also
be shut down.
Test your brakes as instructed on
page 594. If the brakes feel normal,
drive slowly and have your vehicle
repaired by your dealer as soon as
possible. Avoid sudden hard braking
which could cause the rear wheels to
lock up and possibly lead to a loss of
control.Important Safety Reminders
ABS does not reduce the time or
distance it takes to stop the
vehicle.
It only helps with steering
control during braking.
ABS will not prevent a skid that
results from changing direction
abruptly, such as trying to take a
corner too fast or making a sudden
lane change. Always drive at a safe
speed for the road and weather
conditions. ABS cannot prevent a loss of
stability.
Always steer moderately
when you are braking hard. Severe
or sharp steering wheel movement
can still cause your vehicle to veer
into oncoming traffic or off the road.
A vehicle with ABS may require a
longer distance to stop on loose or
uneven surfaces, such as gravel or
snow, than a vehicle without anti-
lock.
Anti-lock Brakes (ABS)
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OverviewIf equippedThe collision mitigation braking
system™(CMBS ™) can assist you
when there is a possibility of your
vehicle hitting the vehicle in front 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 there is time to
prevent it. Here is a brief description
of what the CMBS can do:●When your speed is above 10 mph
(16 km/h), the CMBS radar
sensor in the front grille can sense
a vehicle ahead of you. When your
vehicle gets too close to the
vehicle ahead of you, the system
may activate a warning beep,
causing automatic application of
the brakes, and causing the e-
pretensioners to tighten the front
seat belts (see page 24).
●The CMBS does not activate if the
speed difference between the two
vehicles is less than 10 mph (16
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 CMBS consists of a radar sensor
in the front grille, a brake actuator in
the engine compartment, an
indicator on the instrument panel,
seat belt e-pretensioners on the front
seats, and an on/off switch under the
driver's side vent.RADAR SENSOR
BRAKE
ACTUATOR SEAT BELT
e-PRETENSIONERS
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The radar sensor may not always
scan as intended. Here are two
examples:●Your vehicle is tilted because of a
heavy load in the rear or from
modifications to the suspension.
Do not overload your vehicle (see
Carrying Cargoon page 465), and
do not make any modifications to
the suspension (see Accessories
and Modifications on page 463).●The tires are not correctly
maintained. Always make sure the
tire pressures are correct (see
page 568), and that the tires are
the correct size and in good
condition (see Tires on page 567). Collision Alarm
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
flashes on the multi-information
display. If these alarms come on,
take the appropriate means to
prevent a collision (apply the brakes,
change lanes, etc.).
Collision Mitigation Braking System
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Distance between vehicles
CMBS
The radar sensor detects a vehicle E-pretensionerAudio & Visual
WARNINGS Braking
operation
Stage one There is a risk of a
collision with the
vehicle ahead, or the
distance between the
vehicles has dropped
below a certain level.
—
A beep sounds
and
‘‘BRAKE ’’
flashes on the
multi-
information
display.
—
Stage two The distance between
the two vehicles
continues to diminish.Retracts the driver's
seat belt gently a few
times, providing a
physical warning.
Lightly
applied
Stage three
ꭧ
The CMBS determines
that a collision is
unavoidable. Forcefully tightens
driver and front
passenger seat belts.
Forcefullyapplied
ꭧ : Depending on the circumstances, CMBS may not go through all of the alert stages before initiating the last stage.
YOUR
VEHICLE VEHICLE
AHEAD
YOUR
VEHICLEVEHICLE
AHEAD
YOUR
VEHICLEVEHICLE
AHEAD
CONTINUED
Collision Mitigation Braking System
™(CMBS™ )
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CMBS OFF ButtonTo turn the CMBS off, press the
CMBS OFF button under the driver's
side vent for 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 button
again for about 1 second.When you select the ON mode by
operating the engine start/stop
button (see page 194), the CMBS is
turned on if it was on previously.
Automatic Shut Off
Any of the conditions below can
cause the CMBS to shut off. When
the system shuts off, the CMBS
indicator in the instrument panel
comes on, and a CHECK CMBS
SYSTEM message appears on the
multi-information display for about 5
seconds.
●An abnormal tire condition is
detected (wrong tire size, flat tire,
etc.).●Extended off-road or mountainous
driving.●Driving your vehicle with the
parking brake applied.●Driving your vehicle in bad
weather (rain, fog, snow, etc.).●A dirty radar sensor cover on the
front grille.
The CMBS will automatically recover
when these conditions are improved.
CMBS OFF BUTTON
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Limitations
The CMBS may not activate under
some conditions. Here are a few
examples:●The distance between your vehicle
and the vehicle ahead of you is too
short.●A vehicle cuts in front of you at a
slow speed.
●A vehicle cuts in front of you and
brakes suddenly.●When you accelerate rapidly and
approach the vehicle ahead of you
at high speed.●Immediately after you drive off.
●Driving in heavy, stop-and-go
traffic.●The vehicle ahead of you is a
motorcycle or other small vehicle.
YOUR VEHICLE
YOUR VEHICLE
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●When you pass a low bridge at
high speed.●When you go over a sharp-edged
speed bump at high speed.●When you go over areas of
construction on the road surface.
●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, traffic sign, etc.) as a vehicle
ahead of you and temporarily
operate. This is normal.
LOW BRIDGE
RAILS
YOUR VEHICLE
SIGN, POLE, etc.
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Important Safety Reminder
The main purpose of the CMBS is to
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.
As required by the FCC:This device complies with Part 15 ofthe FCC rules. Operation is subjectto the following two conditions: (1)
This device may not cause harmfulinterference, and (2) this device mustaccept any interference received,including interference that maycause undesired operation.
Changes or modifications notexpressly approved by the partyresponsible for compliance could
void the user's authority to operatethe equipment.
This device complies with IndustryCanada Standard RSS-210. Operationis subject to the following twoconditions: (1) this device may notcause interference, and (2) thisdevice must accept any interference
that may cause undesired operationof the device.
Collision Mitigation Braking System ™(CMBS™ )
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