2021 MAZDA MODEL 3 HATCHBACK brake

▼Pre-Crash Safety Technology
Pre-crash safety technology is designed
to assist the driver in averting collisions
or reducing their severity in situations
where they cannot be avoided.
Collision damage reduction
Forward driving
Smart Brake Support (SBS) ..................
........................................ page 4-158
Reverse driving
Smart Brake Support [Rear]
(SBS
-R).............................page 4-160
Smart Brake Support [Rear Crossing] (S
BS -RC)............................. page 4-164
▼ Camera and Sensors
Forward Sensing Camera (FSC)
The Forward Sensing Camera (FSC)
detects lane indications and recognizes
headlights, taillights and city lights
during nighttime driving. In addition, it
also detects the vehicle ahead,
pedestrians, or obstructions. The
following systems use the Forward
Sensing Camera (FSC).
High Beam Control system (HBC)Lane Departure Warning System
(LDWS)
Tra
ffic Sign Recognition System (TSR)Distance & Speed Alert (DSA)Driver Attention Alert (DAA)Mazda Radar Cruise Control
(MRCC)
Mazda Radar Cruise Control with
Stop & Go function (MRCC with
Stop & Go function)
Lane-keep Assist System (LAS)Tra
ffic Jam Assist (TJA)Smart Brake Support (SBS)
The Forward Sensing Camera (FSC) is
installed at the top of the windshield
near the rearview mirror.
Refer to Forward Sensing Camera
(FSC) on page 4-203.
Front radar sensor
The front radar sensor detects radio
waves re flected o ff a vehicle ahead
sent from the radar sensor. The
following systems use the front radar
sensor.
Distance & Speed Alert (DSA)Mazda Radar Cruise Control
(MRCC)
Mazda Radar Cruise Control with
Stop & Go function (MRCC with
Stop & Go function)
Tra ffic Jam Assist (TJA)Smart Brake Support (SBS)
The front radar sensor is mounted
behind the radiator grille.
Refer to Front Radar Sensor on page
4-207.
Front side radar sensor
The front side radar sensors detects
radio waves re flected off a vehicle
ahead sent from the radar sensor. The
following systems use the front side
radar sensor.
Front Cross Tra ffic Alert (FCTA)
The front side radar sensors are
installed inside the front bumper, one
on the left side and one on the right
side.
Refer to Front Side Radar Sensor on
page 4-209.
When Driving
i-ACTIVSENSE
4-86
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

Rear side radar sensor
The rear side radar sensors emit radio
waves and detect the radio waves
reflected off a vehicle approaching
from the rear or an obstruction. The
following systems use the rear side
radar sensor.
Blind Spot Monitoring (BSM)Rear Cross Tra ffic Alert (RCTA)Smart Brake Support [Rear Crossing]
(SBS -RC)
The rear side radar sensors are installed
inside the rear bumper, one on the left
side and one on the right side.
Refer to Rear Side Radar Sensor on
page 4-211.
Rear/rear corner/rear side ultrasonic
sensor
The ultrasonic sensor detects ultrasonic
waves reflected
o ff obstructions at the
rear sent from the ultrasonic sensors.
The following systems use the
ultrasonic sensor.
Smart Brake Support [Rear] (SBS -R)Smart Brake Support [Rear Crossing]
(SBS -RC)
The ultrasonic sensors are mounted in
the rear bumper.
Refer to Rear/Rear corner/Rear Side
Ultrasonic Sensor on page 4-212.
Front camera/side cameras/rear
camera
The front camera, side cameras, and
rear camera shoot images of the area
surrounding the vehicle. The 360°View
Monitor uses each camera.
Cameras are installed to the front
bumper, door mirrors, and rear
bumper.
Refer to Front Camera/Side Cameras/
Rear Camera on page 4-213.
Driver monitoring camera
The driver monitoring camera detects
changes in the driver's facial features
and estimates the amount of
accumulated fatigue and sleepiness of
the driver. The following systems use
the driver monitoring camera.
Driver Monitoring (DM)
The driver monitoring camera is
mounted in the center display.
Refer to Driver Monitoring Camera on
page 4-214.
▼ i-ACTIVSENSE Status Symbol
(Warning/Risk Avoidance Support
System)
*
The system noti
fies the driver of any of
the following system status using the
color or OFF indication of the
i-ACTIVSENSE status symbol
(Warning/risk avoidance support
system).
Lane Departure Warning System
(LDWS)
Blind Spot Monitoring (BSM)Distance & Speed Alert (DSA)Front Cross Tra ffic Alert (FCTA)Rear Cross Tra ffic Alert (RCTA)Lane-keep Assist System (LAS)
NOTE
The status of the system turned on
using the personalization feature is
displayed.
i-ACTIVSENSE status symbol
(warning/risk avoidance support
system) (white)
When Driving
i-ACTIVSENSE
*Some models.4-87
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

▼When the System Operates
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 ignition is switched ON.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 LDWS goes on standby in the
following cases: The LDWS 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.The steering wheel is operated.The brake pedal is operated.
The function is temporarily stopped.
The LDWS 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).
When Driving
i-ACTIVSENSE
4-94
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

▼Excessive Speed Warning
If the vehicle speed exceeds the speed limi
t sign displayed in the active driving
display/instrument cluster, the area around the speed limit sign flashes in amber and
the warning sound is activated at the same time. If the vehicle speed continues to
exceed the displayed speed limit sign, the indication stops flashing and remains on.
Check the surrounding conditions and adju st the vehicle speed to the legal speed
using the appropriate operation such as depressing the brake pedal.
1. Vehicle is doing 55 mph when 50 mph speed limit sign is recognized.
2. Vehicle continues to do 55 mph after 50 mph speed limit sign is recognized.
3. Active driving display indication
4. Instrument cluster

The excessive speed warning is initially set to inoperable. If you want to activate the
excessive speed warning, change the setting in the personalization features. In
addition, the warning pattern and the warning activation timing di ffer depending on
the setting contents.
Refer to the Settings section in the Mazda Connect Owner's Manual.
When Driving
i-ACTIVSENSE
4-106
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

Distance & Speed Alert(DSA)
*
▼Distance & Speed Alert (DSA)
The DSA is a system which provides
advice for maintaining the appropriate
distance between vehicles and
notifies
the driver of the recommended, safe
distance to maintain with a vehicle
ahead. The system measures the
distance between your vehicle and a
vehicle ahead while the vehicle speed
is about 30 km/h (19 mph) or faster. If
the distance between your vehicle and
a vehicle ahead is close, the system
alerts the driver of a possible collision
using an indication on the display.
WARNING
Do not rely completely on the DSA :
The ability of the system to detect a
vehicle ahead is limited depending on
the type of vehicle ahead, weather
conditions, or tra ffic conditions. In
addition, the system is not for
maintaining the distance between your
vehicle and a vehicle ahead. If you
neglect to operate the accelerator and
brake pedals correctly, it could lead to
an accident. Always check the safety of
the surrounding area and depress the
brake pedal or accelerator pedal while
keeping a safe distance from vehicles
ahead or on-coming vehicles.
Operation conditions
The DSA operates when the following
conditions are all met.
The ignition is switched ON.The DSA is turned on.The shift lever (manual transmission
vehicle) or the selector lever
(automatic transmission vehicle) is in
a position other than R.
The vehicle speed is about 30 km/h
(19 mph) or faster.
i-ACTIVSENSE status symbol
(warning/risk avoidance support
system) (green) is displayed.
NOTE
The objects which activate the
system are four-wheeled vehicles.
The DSA may also operate in the
presence of motorcycles and
bicycles.
The DSA may not operate normally
when the speed of a vehicle ahead is
too slow.
The system does not operate with
the following objects.
Vehicles approaching in the
opposite direction.
Stationary objects (stopped
vehicles, obstructions)
The DSA can be set to inoperable.
(If only the DSA is turned o ff)
Refer to the Settings section in the
Mazda Connect Owner's Manual.
(If the DSA is turned o ff by
operating the i-ACTIVSENSE OFF
switch)
Refer to i-ACTIVSENSE OFF Switch
on page 4-89.
When Driving
i-ACTIVSENSE
4-108*Some models.
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

If the ignition is switched OFF while
you have canceled the system using
the i-ACTIVSENSE OFF switch, the
system is automatically enabled the
next time the ignition is switched
ON. However, if the system is
canceled using the personalization
features, the system is not
automatically enabled.
▼Vehicle Ahead Close Proximity
War n in g
When the system determines that the
distance between your vehicle and a
vehicle ahead is close, the
i-ACTIVSENSE status symbol (warning/
risk avoidance support system)
changes from green to amber and the
warning indication is displayed on the
multi-information display. While
checking the safety of the surrounding
area, depress the brake pedal while
keeping a safe distance from the
vehicle ahead.
Driver Attention Alert
(DAA)
*
▼Driver Attention Alert (DAA)
The DAA is a system which detects
driver fatigue and decreased
attentiveness, and encourages the
driver to take a rest.
When the vehicle is driven inside traffi
c
lane lines at about 65 to 140 km/h
(41 to 86 mph), the DAA estimates the
amount of accumulated fatigue and
decreased attentiveness of the driver
based on the information from the
Forward Sensing Camera (FSC) and
other vehicle information, and
encourages the driver to take a rest
using an indication on the
multi-information display and a
warning sound.
Use the DAA on expressways or
highways.
Refer to Forward Sensing Camera
(FSC) on page 4-203.
When Driving
i-ACTIVSENSE
*Some models.4-109
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

Mazda Radar Cruise
Control (MRCC) (Manual
Tra n s m i s s i o n )
*
▼Mazda Radar Cruise Control
(MRCC)
The MRCC system is designed to
maintain headway control*1 with a
vehicle ahead according to your
vehicle's speed using a front radar
sensor to detect the distance to the
vehicle ahead and a preset vehicle
speed without you having to use the
accelerator or brake pedals.
*1 Headway Control: Control of the distance between your vehicle and
the vehicle ahead detected by the
MRCC system.
Additionally, if your vehicle starts
closing in on the vehicle ahead such as
if the vehicle ahead brakes suddenly, a
warning sound and a warning
indication in the display are activated
simultaneously to alert you to maintain
a su fficient distance between the
vehicles.
Also refer to the fo llowing before using
the MRCC.
Front radar sensor (page 4-207)
WARNING
Do not rely completely on the MRCC :
The MRCC 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
su fficiently to avoid hitting the vehicle
ahead if the vehicle ahead applies the
brakes suddenly or another vehicle
cuts into the driving lane, 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 system in the
following locations. Using the MRCC
system at the following locations may
result in an unexpected accident:
 General roads other than highways
(Driving under these conditions
using the MRCC system is not
possible.)
 Roads with sharp curves and where
vehicle tra ffic is heavy with
insu fficient space between vehicles,
or roads where frequent and
repetitive acceleration and
deceleration occur (Driving under
these conditions using the MRCC 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.)
When Driving
i-ACTIVSENSE
4-120*Some models.
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34

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.)
 Two-wheeled vehicles such as
motorcycles or bicycles are ahead.
For safety purposes, switch the MRCC
system o ff when it is not being used.
Leaving the MRCC system turned on
when it is not in use is dangerous as it
could operate unexpectedly, resulting
in an accident.
CAUTION
 Turn the system
off when the vehicle
is running on a chassis roller.
 If your vehicle is towed or you are
towing something , switch the MRCC
system o ff to prevent an unexpected
operation.
NOTE
The MRCC system does not detect
the following as physical objects.
Vehicles approaching in the
opposite direction
Pe d e s t r i a n sStationary objects (stopped
vehicles, obstructions)
If a vehicle ahead is traveling at an
extremely low speed, the system
may not detect it correctly.
If there is a structure on the road or
an object (such as a monorail) at a
low height o ff the ground in front of
the vehicle, the system may operate.
Therefore, do not use the MRCC.
Do not use the MRCC system under
conditions in which close proximity
warnings are frequently activated.
During headway control travel, the
system accelerates and decelerates
your vehicle in conjunction with the
speed of the vehicle ahead.
However, if it is necessary to
accelerate for a lane change or if the
vehicle ahead brakes suddenly
causing you to close in on the vehicle
rapidly, accelerate using the
accelerator pedal or decelerate using
the brake pedal depending on the
conditions.
While the MRCC system is in use, it
does not cancel even if the shift lever
is operated and any intended engine
braking will not occur. If deceleration
is required, lower the vehicle speed
setting or depress the brake pedal.
While braking by the MRCC control
is operating, you might hear an
operation sound, however, this does
not indicate a problem.
The brake lights turn on while
braking by the MRCC control is
operating , however, they may not
turn on while the vehicle is on a
down slope at the set vehicle speed
or traveling at a constant speed and
following a vehicle ahead.
Stop the headway control function to
switch the system to the cruise
control function.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
When Driving
i-ACTIVSENSE
4-121
Mazda3_8JM2-EA -20H_Edition1_new 2020-7-10 17:21:34