2021 MAZDA MODEL 3 HATCHBACK brake

Distance-between-vehiclesguideline
(at 80 km/h (50 mph) vehicle speed) Indication on display
Indication on multi-information display Indication on active driving dis-
play
*1
Extremely short (about 25 m (82
ft))
*1 Displays a pop-up image when the CANCEL switch is operated.
NOTE
The distance-between-vehicles di ffers 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.

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In the following cases, the TJA cancel indication 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.

Steering assist function
If any of the following conditions occurs, the steering assist function is temporarily
canceled.
The headway control function is canceled.White (yellow) lane lines cannot be detected or a vehicle ahead cannot be
recognized.
Your vehicle speed is more than about 64 km/h (40 mph).The accelerator pedal is operated.The turn signal lever is operated.The vehicle is being driven on a sharp curve.The width of a lane is excessively narrow or wide.The vehicle crosses a lane line.The driver takes his/her hands o ff the steering wheel.The steering wheel is operated abruptly.There is a problem with the system.The temperature in the Forward Sensing Camera (FSC) is too high or too low.The windshield around the Forward Sensing Camera (FSC) is foggy.The windshield around the Forward Sensing Camera (FSC) is blocked by an
obstruction, causing poor forward visibility.

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NOTE
If the set speed is not indicated on the display, the system does not operate even if
the RES switch is pressed.
After the operation, the steering assist operation may not operate for a period of 5
seconds at the most until the lane lines are detected or a vehicle ahead is
recognized.

Tu r n i n g o ff
When the TJA switch is pressed while the TJA is operating, the TJA turns o ff.
▼ Shift-up/Shift-down Request
Display (Manual Transmission)
The shift-up or shift-down request
display might be displayed while the
TJA is operating. When this occurs, shift
gears because the gear position is not
appropriate.
Request Indication on display
Shift up Shift Up to a Higher Gear
Shift down Shift Down to a Lower Gear
NOTE
If the gears are not shifted up even
though the shift-up request
indication is displayed, load will be
applied to the engine and the TJA
might be automatically canceled or
engine damage could occur.
If the gears are not shifted down
even though the shift-down request
indication is displayed, the TJA might
be automatically canceled or engine
stalling could occur.
▼ Stop Hold Control (Automatic
Transmission)
While in headway control using the
TJA, your vehicle will stop when a
vehicle ahead stops. When the vehicle
is stopped and the stop hold control
operates, the TJA indicator light turns
on.
NOTE
Even if the TJA is temporarily
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
or longer have passed since the stop
hold control operated. When this
occurs, the TJA is temporarily
canceled.
The brake lights turn on during stop
hold control.

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▼System Operation
When the ignition is switched ON, the
i-ACTIVSENSE status symbol (warning/
risk avoidance support system) (white)
turns on and the system goes on
standby.
NOTE
If the i-ACTIVSENSE status symbol
(warning/risk avoidance support
system) (white) does not turn on, the
system is canceled using the
i-ACTIVSENSE OFF switch or the
personalization feature.
Operation conditions
When all of the following conditions
are met, the i-ACTIVSENSE status
symbol (warning
/risk avoidance
support system) on the
multi-information display changes
from white to green and the system
becomes operational.
The vehicle speed is about 64 km/h
(40 mph) or faster.
The system detects white (yellow)
lane lines.
NOTE
When the system does not detect a
white (yellow) lane line on one side
only, the system does not operate on
the side that is not being detected.
When temporarily canceling the
system
The LAS goes on standby in the
following cases: The LAS operation is
automatically restored when the
system's operation conditions are met.
The system cannot detect white
(yellow) lane lines.
The vehicle speed is less than about
56 km/h (35 mph).
The turn signal lever is operated.The accelerator pedal is depressed
abruptly.
The TCS/DSC is operating.The DSC is turned o ff.The steering wheel is operated.The brake pedal is operated.
The function is temporarily stopped.
The LAS stops functioning in the
following cases:
The temperature in the forward
sensing camera (FSC) is too high or
too low.
The windshield around the forward
sensing camera (FSC) is foggy.
The windshield around the forward
sensing camera (FSC) is blocked by
an obstruction, causing poor forward
visibility.
Strong light (such as sunlight, or
headlights (high-beam) of
on-coming vehicles) is directed at
the forward sensing camera (FSC).
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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 depresses 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
o ff 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 o ff-road.
See the next page on how to turn off
the system.
Refer to Stopping the Smart Brake
Support (SBS) System Operation on
page 4-160.
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 4-163.
 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 o ff-road in areas where
there is grass or foliage, it is
recommended that the SBS-R system
be turned o ff.
 Always use tires of the speci fied size
and the same manufacturer, brand,
and tread pattern on all 4 wheels. In
addition, do not use tires with signi ficantly di fferent 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.
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