2021 MAZDA MODEL CX-30 brake sensor

Forward Sensing Camera (FSC) (page
4-198)
Front radar sensor (page 4-202)
WARNING
Do not rely completely on the MRCC
with Stop & Go function:
The MRCC with Stop & Go function
system has detection limitations
depending on the type of vehicle
ahead and its conditions, the weather
conditions, and the road conditions.
Additionally, the system may be unable
to decelerate sufficiently to avoid
hitting the vehicle ahead if the vehicle
ahead applies the brakes suddenly or
another vehicle cuts into the driving
lane in front of you, which could result
in an accident.
Always drive carefully and verify the
surrounding conditions and depress
the brake pedal or accelerator pedal
while keeping a safe distance from
vehicles ahead or on-coming vehicles.
Do not use the MRCC with Stop & Go
function system in the following
locations. Using the MRCC with Stop
& Go function system at the following
locations may result in an unexpected
accident:
General roads other than highways
(Driving under these conditions
using the MRCC with Stop & Go
function system is not possible.)
 Roads with sharp curves and where
vehicle traffic is heavy with
insufficient space between vehicles,
or roads where frequent and
repetitive acceleration and
deceleration occur (Driving under
these conditions using the MRCC
with Stop & Go function is not
possible.)
 When entering and exiting
interchanges, service areas, and
parking areas of highways (If you exit
a highway while headway control is
in use, the vehicle ahead will no
longer be tracked and your vehicle
may accelerate to the set speed.)
 Slippery roads such as ice or
snow-bound roads (Tires could spin
causing you to lose vehicle control,
or the stop hold control may not
operate.)
 Long, descending slopes (to
maintain distance between vehicles,
the system automatically and
continuously applies the brakes
which could result in the loss of
brake power.)
 Slopes with a steep gradient (The
vehicle ahead may not be detected
correctly, your vehicle may slide
while stopped by the stop hold
control, and it may accelerate
suddenly after it starts moving.)
 Two-wheeled vehicles such as
motorcycles or bicycles are ahead.
For safety purposes, switch the MRCC
with Stop & Go function system off
when it is not being used.
Leaving the MRCC with Stop & Go
function system turned on when it is
not in use is dangerous as it could
operate unexpectedly, resulting in an
accident.
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The Smart Brake Support (SBS) has
operated.
When traveling on a downslope for a
long period of time.
There is a problem with the system.The parking brake is automatically
applied during stop hold control.
The front radar sensor cannot detect
target objects (during rain, fog, snow
or other inclement weather
conditions, or when the radiator
grille is dirty).
The parking brake is applied.Any of the doors is opened.The driver's seat belt is unfastened.The operation frequency of the
braking by the MRCC with Stop &
Go function control is high.
Resuming control
If the MRCC with Stop & Go function
system is canceled, you can resume
control at the previously set speed by
pressing the RES switch and after all of
the operation conditions have been
met.
NOTE
If the set speed is not indicated in the
display, the control does not resume
even if the RES switch is pressed.
Turning off the system
When the MRCC switch is pressed
while the MRCC is operating, the
MRCC turns off.
▼ Stop Hold Control
While in headway control using the
MRCC with Stop & Go function
system, your vehicle will stop when a
vehicle ahead stops. When the vehicle
is stopped and the stop hold control
operates, the MRCC with Stop & Go
function indicator light turns on.
NOTE
If the MRCC with Stop & Go
function system is canceled during
stop hold control, the vehicle is held
in its stopped position.
The parking brake is automatically
applied and the vehicle is held in its
stopped position when 10 minutes
have elapsed since the stop hold
control operated. At this time, the
MRCC with Stop & Go function
system is canceled.
The brake lights turn on during stop
hold control.
To resume driving
After the vehicle ahead starts moving
while your vehicle is stopped under
stop hold control, press the RES switch
or depress the accelerator pedal to
cancel the stop hold control and
resume driving.
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NOTE
The distance-between-vehicles differs depending on the vehicle speed, and the
slower the vehicle speed, the shorter the distance.
When the ignition is switched to ACC or OFF, the set distance-between-vehicles is
taken over automatically even when the engine is started again.

The function is temporarily canceled.
Headway control function
When the following operations are performed, the headway control function is
temporarily canceled and the TJA set indication (green) changes to the TJA standby
indication (white) at the same time.
The CANCEL switch is pressed one time.The brake pedal is depressed.(Automatic transmission vehicle)
The selector lever is in the P, N, or R position.
(Manual transmission vehicle)
The shift lever is in the R position.

In the following cases, the TJA cancel indica tion is displayed and a sound is activated
one time.
The DSC has operated.The Smart Brake Support (SBS) has operated.The vehicle is driven on a downslope for a long time.There is a problem with the system.The front radar sensor cannot detect target objects (during rain, fog , snow or other
inclement weather conditions, or when the radiator grille is dirty).
The parking brake is applied.Any of the doors is opened.The driver's seat belt is unfastened.The operation frequency of the braking by the TJA control is high.(Automatic transmission vehicle)
The parking brake is automatically applied during stop hold control.
(Manual transmission vehicle)
The vehicle speed decreases below 25 km/h (15 mph).The shift lever is in the neutral posi tion for a certain period of time.The clutch pedal is depressed for a certain period of time.The engine has stalled.

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Smart Brake Support(SBS)
*
▼Smart Brake Support (SBS)
The SBS alerts the driver of a possible
collision using the warning indications
in the display and a warning sound if
the front radar sensor and Forward
Sensing Camera (FSC) determine that
there is the possibility of a collision
with a vehicle ahead, pedestrian, or a
bicycle. Furthermore, if a collision is
unavoidable, the automatic brake
control is performed to reduce damage
in the event of a collision. In addition,
when the driver de
presses the brake
pedal, the brakes are applied firmly
and quickly to assist.
(Vehicles with Driver Monitoring
(DM))
When the SBS determines that the
driver is not paying attention to the
road using the driver monitoring
camera and it determines that there is
the possibility of a collision with an
obstruction, the SBS activates the
collision warning earlier than normal.
WARNING
Do not rely completely on the SBS:
The SBS is only designed to reduce
damage in the event of a collision.
The ability to detect obstructions is
limited depending on the obstructions,
weather conditions, or traffic
conditions. Over reliance on the
system leading to the accelerator pedal
or brake pedal being mistakenly
operated could result in an accident.
CAUTION
In the following cases, turn the system
off to prevent an unexpected
operation.
 The vehicle is being towed or when
towing another vehicle.
 The vehicle is on a chassis roller.
 When driving on rough roads such as
in areas of dense grass or off-road.
See the next page on how to turn
off
the system.
Refer to Stopping the Smart Brake
Support (SBS) System Operation on
page 4-157.
Operation conditions
The SBS operates when all of the
following conditions are met.
The ignition is switched ON.The SBS is on.The i-ACTIVSENSE warning
indication/warning light is not
turned on.
(Object is vehicle ahead)
The vehicle speed is about 4 km/h
(2 mph) or higher.
(Object is a pedestrian or bicycle)
The vehicle speed is between about
10 to 80 km/h (6.2 to 50 mph).
The DSC does not operate.
NOTE
Under the following conditions, the
SBS may not operate.
If there is the possibility of hitting
only a part of a vehicle or
obstruction ahead.
You are driving your vehicle at the
same speed as the vehicle ahead.
When the driver deliberately
performs driving operations
(accelerator operation, steering
wheel operation).
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The accelerator pedal is depressed
abruptly.
The brake pedal is being
depressed.
The steering wheel is being
operated.
The selector lever is being shifted.The turn signal lever is being
operated.
When warnings and messages,
such as a dirty windshield, related
to the Forward Sensing Camera
(FSC) or front radar sensor are
being displayed on the
multi-information display.
The SBS may operate under the
following conditions.
There is an object in the road at
the entrance to a curve (including
guardrails and snow banks).
Passing an approaching vehicle
while rounding a curve.
When crossing a narrow bridge,
and passing through low gates,
narrow gates, car washing
machines, or tunnels.
When passing through a toll gate.When entering an underground
parking area.
There is a metal object, bump, or a
protruding object on the road.
If you suddenly come close to a
vehicle ahead.
There is an animal, wall, or tree.Notifies the driver with a warning
indication on the multi-information
display and the active driving display
(vehicles with active driving display)
while the system is operating.
If a malfunction is detected or the
system temporarily stops the
function due to dirty sensors (such as
radar sensor or Forward Sensing
Camera (FSC)), the i-ACTIVSENSE
warning indication/warning light
turns on and a message is displayed
on the multi-information display.
On a manual transmission vehicle,
the engine stops if the clutch pedal is
not depressed when the vehicle is
stopped by the SBS brake operation.
If the vehicle is stopped by the SBS
brake operation and the brake pedal
is not depressed, the SBS brake is
automatically released after about 2
seconds.
▼ Collision Warning
When there is a possibility of a
collision with a vehicle ahead, the
collision warning sound is activated
continuously and a warning is
displayed on the multi-information
display and the active driving display.
Multi-information display
1. “BRAKE!” message is displayed

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Active driving display
1. “BRAKE!” message is displayed
NOTE
The collision warning sound is
activated intermittently while the SBS
brake or brake assist (SBS brake
assist) is operating.
The operation distance and volume
of the collision warning can be
changed.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
▼Stopping the Smart Brake Support
(SBS) System Operation
The SBS can be changed to inoperable.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
When the SBS is canceled, the SBS OFF
indicator light turns on.
NOTE
When the ignition is switched OFF
while the SBS is canceled, the SBS is
automatically enabled the next time
the ignition is switched ON.
Smart Brake Support
[Rear] (SBS-R)
*
▼Smart Brake Support [Rear]
(SBS-R)
The SBS-R is a system which is
designed to reduce damage in the
event of a collision by operating the
brake control (SBS brake) when the
system’s sensors detect an obstruction
at the rear of the vehicle while driving
at a speed of about 2 to 8 km/h (2 to
4 mph) and the system determines that
a collision is unavoidable.
WARNING
Do not rely completely on the SBS-R
system:

The
SBS-R system is only designed to
reduce damage in the event of a
collision. Over reliance on the system
leading to the accelerator pedal or
brake pedal being mistakenly
operated could result in an accident.
 To assure the correct operation of
the SBS-R, heed the following
cautions.
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Do not apply a sticker to a rear
ultrasonic sensor and rear camera.
Otherwise, the rear ultrasonic
sensor and rear camera may not be
able to detect vehicles or
obstructions which could result in
an accident.
 Do not disassemble a rear
ultrasonic sensor and rear camera.
 If cracks or damage caused by
flying gravel or debris is visible
around a rear ultrasonic sensor and
rear camera, stop using the SBS-R
system immediately and have your
vehicle inspected by an Authorized
Mazda Dealer. If the vehicle
continues to be driven with cracks
or scratch marks left around an
ultrasonic sensor, the system may
operate unnecessarily and cause
an unexpected accident.
Refer to Stopping the Smart Brake
Support [Rear] (SBS-R) System
Operation on page 4-160.
 Consult an Authorized Mazda
Dealer for rear bumper removal.
Do not modify the suspension:
If the vehicle height or inclination is
changed, the SBS-R system may not
operate correctly because it cannot
detect obstructions correctly.
Do not apply a strong force to a rear
ultrasonic sensor and rear camera:
When washing the vehicle, do not
spray highly pressurized water against a
rear ultrasonic sensor and rear camera,
or rub it strongly. In addition, do not
hit the rear bumper forcefully when
loading and unloading cargo.
Otherwise, the sensors may not detect
obstructions correctly which could
cause the SBS-R system to not operate
normally, or it could operate
unnecessarily.CAUTION
 When driving
off-road in areas where
there is grass or foliage, it is
recommended that the SBS-R system
be turned off.
 Always use tires of the specified size
and the same manufacturer, brand,
and tread pattern on all 4 wheels. In
addition, do not use tires with
significantly
different wear patterns
on the same vehicle. Otherwise, the SBS-R system may not operate
normally.
 If ice or snow is stuck on the rear
ultrasonic sensor and rear camera
they may not be able to detect
obstructions correctly depending on
the conditions. In such cases, the
system may not be able to perform
controls correctly. Always drive
carefully and pay attention to the
rear of the vehicle.
NOTE
The vehicle posture changes
depending on the accelerator pedal,
brake pedal and steering wheel
operations, which could make it
difficult for the system to recognize
an obstruction, or it could facilitate
unnecessary detection. In such cases,
the SBS-R may or may not operate.
The SBS-R system will operate under
the following conditions.
The engine is running for 3 seconds
or more.
The shift lever (manual
transmission vehicle) or the
selector lever (automatic
transmission vehicle) is in the R
(reverse) position.
i-ACTIVSENSE warning indication/
warning light is not displayed in the
multi-information display.
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The vehicle speed is between
about 2 to 8 km/h (2 to 4 mph).
The SBS-R is not turned off.The DSC is not malfunctioning.In the following cases, the rear
ultrasonic sensor and rear camera
cannot detect obstructions and the
SBS-R may not operate.
The height of the obstruction is
low such as low walls or trucks
with low loading platforms.
The height of the obstruction is
high such as trucks with high
loading platforms.
The obstruction is small.The obstruction is thin such as a
signpost.
The surface of the obstruction is
not pointed vertically relative to
the vehicle.
The obstruction is soft such as a
hanging curtain or snow stuck to a
vehicle.
The obstruction is shaped
irregularly.
The obstruction is extremely close.In the following cases, the rear
ultrasonic sensor and rear camera
cannot detect obstructions correctly
and the SBS-R may not operate.
Something is stuck on the bumper
near a rear ultrasonic sensor.
The brake or accelerator pedal is
operated.
There is another obstruction near
one obstruction.
During inclement weather such as
rain, fog and snow.
High or low humidity.High or low temperaturesStrong winds.The path of travel is not
flat.Heavy luggage is loaded in the
luggage compartment or on the
rear seat.
Objects such as a wireless antenna,
fog light, or illuminated license
plate is installed near a rear
ultrasonic sensor.
The orientation of a rear ultrasonic
sensor has deviated for reasons
such as a collision.
The vehicle is affected by other
sound waves such as the horn,
engine noise, ultrasonic sensor of
another vehicle.
In the following cases, a rear
ultrasonic sensor and rear camera
may detect something as a target
obstruction which could cause the
SBS-R system to operate.
There is a steep slope or bump.There are wheel blocks or a
curbstone.
There are hanging curtains, gate
poles such as at toll gates and
railroad crossing.
When traveling near objects such
as foliage, barriers, vehicles, walls,
and fences along a road.
When driving off-road in areas
where there is grass and forage.
When passing through low gates,
narrow gates, car washing
machines, and tunnels.
A trailer is connected.An exterior accessory such as a
bicycle carrier is installed around a
rear ultrasonic sensor.
(Manual transmission)
If the vehicle is stopped by the SBS-R
operation and the clutch pedal is not
depressed, the engine stops.
When the system operates, the user
is notified by the multi-information
display.
The collision warning beep sounds
intermittently while the SBS-R brake
is operating.
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