MAZDA MODEL 3 SEDAN 2021 Owners Manual

NOTE
The warnings and brake control do not operate while depressing the accelerator
pedal.
The lowest possible speed which can be set on the TJA is 30 km/h (19 mph).(Automatic transmission vehicle)
The vehicle speed setting can be changed by operating the RES switch during stop
hold control.

Changing the distance between vehicles during headway control
The distance-between-vehicles can be set to 4 levels; Long, medium, short, and
extremely short distance.
The distance-between-vehicles is set to a shorter distance by pressing the CANCEL
switch down. The distance-between-vehicles is set to a longer distance by pressing
the CANCEL switch up.
Distance-between-vehicles guideline
(at 80 km/h (50 mph) vehicle speed) Indication on display
Indication on multi-information display Indication on active driving dis-
play
*1
Long (about 50 m (164 ft))
Medium (about 40 m (131 ft))
Short (about 30 m (98 ft))
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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 you take your hands off the steering wheel (not holding the steering wheel), the
warning sound is activated and an alert is indicated on the multi-information display
and the active driving display.
Multi-information display
Active driving display
If the steering wheel is held lightly, or depending on the road conditions, the system
determines that you have released the steering wheel (not holding the steering
wheel) even if you are holding it, and an alert is indicated on the multi-information
display and the active driving display.

To resume operation
If the TJA is temporarily canceled, it will resume operation at the previously set speed
by pressing the RES switch after all of the operation conditions have been met.
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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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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 start
driving.
NOTE
When you resume driving by pressing
the RES switch, your vehicle does not
start moving until the distance
between your vehicle and the vehicle
ahead lengthens to the specified
distance or farther.
If the TJA is temporarily canceled,
depress the accelerator pedal and
start driving the vehicle. If the TJA is
temporarily canceled, you cannot
resume driving by pressing the RES
switch when there are no vehicles in
front of your vehicle.
If the vehicle ahead starts moving
within 3 seconds after your vehicle is
stopped by the stop hold control,
headway control will continue even if
you do not resume driving your
vehicle, such as by depressing the
accelerator pedal.

Vehicle departure information
If you do not resume driving within a
few seconds after the vehicle ahead
starts moving during stop hold control,
the multi-information display
vehicle-ahead indication flashes to
urge the driver to resume driving. If you
do not resume driving after the
indicator light fl ashes, a sound is
activated to urge you to resume
driving.
Lane-keep Assist System
(LAS)
*
▼Lane-keep Assist System (LAS)
The LAS provides steering assistance to
help the driver stay within the vehicle
lane if the vehicle might be deviating.
The forward sensing camera (FSC)
detects the white lines (yellow lines) of
the vehicle lane in which the vehicle is
traveling and if the system determines
that the vehicle may deviate from its
lane, it operates the electric power
steering to assist the driver’s steering
operation. The system also alerts the
driver by displaying an alert on the
multi-information display. Use the
system when you drive the vehicle on
roads with white (yellow) lines such as
expressways and highways.
1. Forward sensing camera (FSC)
WARNING
Do not rely completely on the LAS
:
 The LAS is not an automated driving
system. In addition, the system is not
designed to compensate for a
driver’s lack of caution, and
over-reliance on the system could
lead to an accident.
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The functions of the LAS have
limitations. Always stay on course
using the steering wheel and drive
with care.
 Do not use the LAS under the
following circumstances, otherwise it
may result in an accident.
 The vehicle is driven on slippery
roads such as icy or snow-covered
roads, and unpaved roads.
 Tires of a
different
speci fied size
are used, such as a temporary
spare tire.
 Tires with
insufficient tread are
used.
 The tire pressures are not adjusted
to the
specified pressure.
 The vehicle is being used to tow a
camper or boat trailer.
 Tire chains are used.
 The vehicle is driven on roads with
lane lines other than white (yellow)
lines, such as an expressway.
CAUTION
Heed the following cautions so that
the LAS can operate normally.
Do not modify the vehicle's
suspensions.
 Always use tires of the speci fied type
and size for the front and rear
wheels. Consult an Authorized
Mazda Dealer for tire replacement.
NOTE
The system may not operate normally
under the following conditions.
The white (yellow) lane lines are less
visible because of dirt or paint
fl aking.
White (yellow) lane lines are less
visible because of bad weather (rain,
fog , or snow).
The vehicle is driven on a temporary
lane or section with a closed lane
resulting from construction where
there might be multiple white
(yellow) lane lines, or they are
interrupted.
The camera picks up an obscure line,
such as a temporary line being used
for construction, or because of
shade, unmelted snow, or grooves
filled with water.
The surrounding brightness suddenly
changes such as when entering or
exiting a tunnel.
Back-light is re flected off the road
surface.
The road surface is wet and shiny
after rain, or there are puddles on
the road.
The width of a lane is excessively
narrow.
The vehicle is driven on roads with
tight curves.
Heavy luggage is loaded in the
trunk/luggage compartment or on
the rear seat causing the vehicle to
tilt.
The vehicle is driven through a fork in
the road or a junction.
The shade of a guardrail parallel to a
white (yellow) lane line is cast on the
road.
The illumination of the headlights is
weakened because of dirt or the
optical axis is deviated at night.
The road is excessively uneven.The vehicle is shaken after hitting a
road bump.
A vehicle in front of your vehicle is
running near a white (yellow) lane
line making it less visible.
The windshield is dirty or foggy.Strong light is directed from the front
of the vehicle (such as sunlight, or
headlights (high-beam) of
on-coming vehicles).
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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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System malfunction
If there is a problem with the system,
the i-ACTIVSENSE status symbol
(warning/risk avoidance support
system) (white) and the i-ACTIVSENSE
warning indication/warning light on
the multi-information display turns on
and a message is indicated.
Refer to i-ACTIVSENSE Status Symbol
(Warning/Risk Avoidance Support
System) on page 4-87.
▼Steering Wheel Operation Assist
When the system determines that the
vehicle might be deviating from its
lane, the steering wheel operation
assist operates.
The system notifies the driver of the
direction in which the system provided
steering wheel operation assistance on
the multi-information display.
Multi-information display
NOTE
When the driver operates the steering
wheel while the steering wheel
operation assist is operating, the
steering wheel operation assistance is
canceled.
▼
System Canceling
The LAS can be set to inoperable.
(If only the LAS is turned
off )
Refer to the Settings section in the
Mazda Connect Owner's Manual.
(If the LAS is turned o ff by operating
the i-ACTIVSENSE OFF switch)
Refer to i-ACTIVSENSE OFF Switch
on page 4-89.
NOTE
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.
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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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