brake sensor Acura ZDX 2012 Owner's Manual

Seat Belt e-pretensionersOn models with Collision MitigationBraking System ™(CMBS ™)For added safety, the front seat belts
are equipped with e-pretensioners
that work in combination with the
collision mitigation braking system ™
(CMBS ™) (see page 498) and the
brake pedal assist function (see page
495). 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 front of
you is likely, the e-pretensioners on
both front seats retract the seat belts
with enough force to properly
restrain you and your front
passenger. After they activate, the e-
pretensioners release the retracted
seat belts.
To get the full benefit of the e-
pretensioners, you and your front
passenger must sit normally in your
seats and wear your seat belts
properly (see page 16).
The e-pretensioners do not activate
when the vehicle stability assist
(VSA) off indicator on the instrument
panel is on.
If the automatic seat belt tensioners
are activated by a collision, both front
seat belts and all related components
must be replaced (see page 25). If
only the e-pretensioners were
activated, no components need to be
replaced.
In addition, the front 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
front passenger's seat.Additional Information About Your Seat Belts2409/10/28 17:15:37 10 ACURA ZDX KA KC New North America Own 50 31SZN600 enu

The automatic lighting feature is
controlled by a sensor located on top
of the dashboard. Do not cover this
sensor or spill liquids on it.Fog Lights
Turn the fog lights on and off by
turning the switch next to the
headlight switch.
You can use the fog lights only when
the headlights are on low beam.
With the light switch in the AUTO
position, you can also use the fog
lights when the headlights turn on
automatically. They will go off when
the headlights turn off, or the
daytime running lights are on.Daytime Running Lights
With the headlight switch off, the
daytime running lights come on
when you turn the ignition switch to
the ON (II) position and release the
parking brake. They remain on until
you turn the ignition switch off, even
if you set the parking brake.
When the headlights are on, the
daytime running lights are off.
SUNLIGHT SENSOR
FOG LIGHT SWITCH
CONTINUED
Turn Signal and Headlights
141
Instruments and Controls
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Reverse this procedure to return the
seat-back to the upright position. Pull
on the seat-back to make sure it is
latched. If the seat-back is not
latched fully, the seat belt will not
work properly and you will see the
red indicator behind the handle as
shown.
Do not put any heavy items on the
seat-back when it is folded down.
Make sure that the folded seat-back
does not press against the front
passenger's seat, as this could cause
the weight sensors to work
improperly.
Make sure the seat-back and seat
cushion are locked securely and all
rear shoulder belts are positioned in
front of the rear seat-backs.
Make sure all items in the cargo area
are secured. Loose items can fly
forward and cause injury if you have
to brake hard (SeeCarrying Cargo
on page 465). Front Seat Heaters
On models without adaptive cruise
control (ACC)Both front seats are equipped with
seat heaters. Because of the sensors
for the side airbag cutoff system,
there is no heater in the passenger's
seat-back. The ignition switch must
be in the ON (II) position to use the
heaters. Models equipped with the keyless
access system have an engine start/
stop button instead of an ignition
switch. ON mode is the equivalent of
ON (II). For more information, see
pages 194 and 196.
Push the right side of the switch, HI,
to rapidly heat up the seat. After the
seat reaches a comfortable
temperature, select LO by pushing
the left side of the switch. This will
keep the seat warm.
Passenger's
Seat
HEATERS Driver's
Seat
Front seat
HI
LOW
CONTINUED
Seats, Front Seat Heaters
167
Instruments and Controls
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Overview
Adaptive cruise control (ACC) allows
you to maintain a set speed and keep
the vehicle ahead of you and your
vehicle at a safe distance without
having to use the accelerator pedal or
the brake pedal.
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 faster you go, the longer
the distance will be; the slower you
go, the shorter it will be.If the vehicle ahead of you slows
down suddenly or another vehicle
cuts in front of your vehicle, ACC
alerts you by sounding a beeper and
displaying a message on the multi-
information display.
The ACC radar sensor in the front
grille can detect and monitor the
distance of a vehicle up to 328 feet
(100 meters) ahead of your vehicle.
For more information on the radar
sensor, see page 499.
Important Safety Precautions
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.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, but ACC
would still try to accelerate to your
set speed.●In bad weather (rain, fog, snow,
etc.)●On a slippery road (for example a
road covered with ice or snow).
CONTINUED
Adaptive Cruise Control (ACC)
383
Features
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Canceling the ACCACC is canceled whenever you do
any of these actions:●Push the CANCEL button on the
steering wheel.●Tap the brake pedal.●Press the MAIN button. The ACC
indicator in the instrument panel
goes off.When you push the CANCEL button
or tap the brake pedal to cancel ACC,
the set cruising speed stays in
memory. When you turn on ACC
again, the speed is shown on the
multi-information display. To return
to that speed, accelerate to over 25
mph (40 km/h), then press the RES/
ACCEL button.
If you cancel ACC by pressing the
MAIN button, the previously set
cruising speed is erased from
memory.
Automatic ACC Cancelation
When ACC is automatically canceled,
the beeper sounds about 1 second,
and an ACC OFF message appears
on the multi-information display for 3
seconds.
Any of these conditions may cause
ACC to cancel:
●The vehicle speed decreases
below 22 mph (35 km/h).●Poor weather (rain, fog, snow, etc.)●When the radar sensor in the front
grille gets dirty.●The vehicle ahead of you cannot
be detected.●An abnormal tire condition is
detected, or the tires are skidding.●Driving on a mountainous road, or
driving off road for extended
periods.●Abrupt steering wheel movement.
CANCEL
BUTTON
CONTINUED
Adaptive Cruise Control (ACC)
391
Features
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MessageDescription MessageDescription
ACC has automatically canceled
because its radar sensor in the front
grille is dirty.
You will hear a beep for about 1
second. Apply the brakes immediately.
Your vehicle is too close to the
vehicle ahead of it.
You will hear a continuous beep.
If CMBS is turned off, there is no
multi-information display message
and the warning beep does not
sound.
ACC has automatically canceled
because of bad weather or other
conditions.
You will hear a beep for about 1
second. ACC needs to be checked.
Have your vehicle checked by a
dealer.
Adaptive Cruise Control (ACC)39409/10/28 17:15:37 10 ACURA ZDX KA KC New North America Own 50 31SZN600 enu

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
Collision Mitigation Braking System
™(CMBS™ )49809/10/28 17:15:37 10 ACURA ZDX KA KC New North America Own 50 31SZN600 enu

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
™(CMBS™ )50009/10/28 17:15:37 10 ACURA ZDX KA KC New North America Own 50 31SZN600 enu

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™ )
501
Driving
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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
Collision Mitigation Braking System ™(CMBS™ )50209/10/28 17:15:37 10 ACURA ZDX KA KC New North America Own 50 31SZN600 enu