2021 MAZDA MODEL 3 HATCHBACK parking sensors

i-ACTIVSENSE*
▼i-ACTIVSENSE
i-ACTIVSENSE is a collective term
covering a series of advanced safety
and driver support systems which
make use of cameras and sensors. The
systems consist of active safety and
pre-crash safety systems.
These systems are designed to assist
the driver in safer driving by reducing
the load on the driver and helping to
avert collisions or reduce their severity.
However, because each system has its
limitations, always drive carefully and
do not rely solely on the systems.
▼Active Safety Technology
Active Safety Technology supports safer
driving by helping the driver to
recognize potential hazards and avert
accidents.
Driver awareness support systems
Nighttime visibility
Adaptive Front Lighting System
(AFS).................................. page 4-90
High Beam Control System
(HBC).................................page 4-90
Left/right side and rear side detection
Lane Departure Warning System
(LDWS).............................. page 4-92
Blind Spot Monitoring (BSM)...............
.......................................... page 4-96
Road sign recognition
Tra
ffic Sign Recognition System
(TSR)................................ page 4-101
Inter-vehicle distance recognition
Distance & Speed Alert (DSA) .............
........................................ page 4-108
Front obstruction detection when
approaching a crosswalk
Front Cross Tra ffic Alert (FCTA) ............
........................................ page 4-113
Rear obstruction detection when
leaving a parking space
Rear Cross Tra ffic Alert (RCTA) .............
........................................ page 4-116
Full-surround recognition
360°View Monitor............ page 4-168
Driver fatigue detection
Driver Attention Alert (DAA) ...............
........................................ page 4-109
Driver Monitoring (DM).... page 4-111
Driver support systems
Inter-vehicle distance
Mazda Radar Cruise Control
(MRCC)........................... page 4-120
Mazda Radar Cruise Control with Stop
& Go function (MRCC with Stop & Go
function).......................... page 4-128
Lane departure
Lane-keep Assist System (LAS) .............
........................................ page 4-154
Inter-vehicle distance and lane
keeping
Tra ffic Jam Assist (TJA)........ page 4-139
When Driving
i-ACTIVSENSE
*Some models.4-85
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An object that reflects the radio
waves of the radar such as a
parked vehicle, guardrail, or wall is
directly next to your vehicle.
Vehicles are stopped in the area
around your vehicle such as during
heavy tra ffic.
A vehicle approaching from the
front or side of your vehicle slows
down.
A vehicle approaching from the
front or left side of your vehicle
makes a right or left turn directly in
front of your vehicle.
A vehicle or pedestrian moves in
the parking lot or on the sidewalk
in the area surrounding your
vehicle.
After making a left or right turn, an
on-coming vehicle is present.
When passing an on-coming
vehicle.
A vehicle overtakes your vehicle
while it is stopped.
Your vehicle is in an area where
strong radio waves or electrical
noise may occur such as near a
television tower or power plant.
Under the following conditions, the
front side radar sensor cannot detect
approaching vehicles or it might be
di fficult to detect them, and the
system may not operate normally.
The front side radar sensor
detection area is obstructed by a
nearby wall or vehicle.
Directly after the system becomes
operable.
Radio wave interference from a
radar sensor equipped on a nearby
vehicle.
The approaching vehicle has any of
the following shapes.
a) The size of the vehicle body is extremely small.
b) The vehicle height is extremely low or high.
c) A special type of vehicle with a complex shape
A vehicle suddenly enters the
detection area from the front or
side of your vehicle.
A vehicle that has stopped
suddenly starts to move.
Multiple objects move at the same
time.
The vehicle is driven in bad
weather conditions such as heavy
rain, fog , snow, or sand storms.
The vehicle is driven on a sharp
curve or on bumpy roads.
An object that re flects the radio
waves of the radar such as a
parked vehicle, guardrail, or wall is
directly next to your vehicle.
A vehicle approaches while turning
(Such as roundabout)
The vehicle is driven at an
extremely slow speed.
In the following cases, the system
turns on the i-ACTIVSENSE warning
indication/warning light and
operation of the system is stopped. If
the i-ACTIVSENSE warning
indication/warning light remains on,
have the vehicle inspected by an
Authorized Mazda Dealer as soon as
possible.
Some problem with the system has
occurred.
The front side radar sensor
installation position is greatly
deviated.
There is a large accumulation of
snow or ice on the front bumper
near a front side radar sensor.
The temperature near the radar
sensors becomes extremely hot
due to driving for a long time on
slopes during the summer.
The battery voltage has decreased.
When Driving
i-ACTIVSENSE
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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

When Driving
i-ACTIVSENSE
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Rear view/rear wide view
The image from the rear of the
vehicle is displayed on the center
display.
The image from the rear assists the
driver in checking the rear of the
vehicle by displaying guide lines on
the displayed image taken from the
rear of the vehicle.
Parking sensor
If there are any obstructions near the
vehicle while the top view/side view
is displayed, an obstruction
detection indication turns on around
the bumper in the center display.
The parking sensors use ultrasonic
sensors to detect obstructions
around the vehicle when the vehicle
is driven at low speeds, such as
during garage or parallel parking,
and notifies the driver of the
approximate distance from the
vehicle to the surrounding
obstruction using sound and an
obstruction detection indication.
Refer to Parking Sensor System on
page 4-238.
Front Cross Tra ffic Alert (FCTA)
If there is the possibility of a collision
with an approaching vehicle while
the front view/front wide view/side
view is displayed, a warning is
displayed on the center display.
The Front Cross Traffi c Alert (FCTA) is
designed to assist the driver in
checking both sides of the vehicle
when the vehicle starts to drive at an
intersection.
Refer to Front Cross Tra ffic Alert
(FCTA) on page 4-113.
Rear Cross Tra ffic Alert (RCTA)
If there is the possibility of a collision
with an approaching vehicle while
the rear view/rear wide view is
displayed, a warning is displayed on
the center display.
The Rear Cross Tra ffic Alert (RCTA)
uses rear side radar sensor to detect
vehicles approaching from the rear
left and right sides of the vehicle,
and it assists the driver in checking
the rear of the vehicle while reversing
by flashing the Blind Spot Monitoring
(BSM) warning lights and activating
the warning sound.
Refer to Rear Cross Tra ffic Alert
(RCTA) on page 4-116.
360°View Monitor Range
1. Cameras
2. Ultrasonic sensors
3. Front/Rear side radar sensors
When Driving
i-ACTIVSENSE
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Parking Sensor System*
▼Pa r k i n g S e n s o r Sys t e m
The parking sensors use ultrasonic sensor
s which detect obstructions around the
vehicle when the vehicle is driven at low speeds, such as during garage or parallel
parking , and a buzzer sound and detection indicator notify the driver of the
approximate distance from the vehicle to the surrounding obstruction.

1. Front ultrasonic sensor*
2. Front corner ultrasonic sensor*
3. Rear ultrasonic sensor
4. Rear corner ultrasonic sensor
5. Rear side ultrasonic sensor
*
WARNING
Do not rely completely on the parking sensor system and be sure to con firm the
safety around your vehicl e visually when driving:
This system can assist the driver in operating the vehicle in the forward and
backward directions while parking. The detection ranges of the sensors are limited,
therefore, driving the vehicle while relying only on the system may cause an
accident. Always con firm the safety around your vehicle visually when driving.
When Driving
Pa r k i n g S e n s o r Sys te m
4-238*Some models.
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CAUTION
Do not install any accessories within the detection ranges of the sensors. It may
a ff ect the system operation.
 Depending on the type of obstruction and the surrounding conditions, the
detection range of a sensor may narrow, or the sensors may not be able to detect
obstructions.
NOTE
When the ignition is switched OFF, the system status before it was turned off is
maintained. For example, if the ignition is switched OFF while the parking sensor
is activated, the system will be activate d when the ignition is switched ON the
next time.
The system may not operate normally under the following conditions:
Mud, ice, or snow is adhering to the sensor area (Returns to normal operation
when removed).
The sensor area is frozen (Returns to normal operation when the ice is thawed).The sensor is covered by a hand.The sensor is excessively shocked.The vehicle is excessively tilted.Under extremely hot or cold weather conditions.The vehicle is driven on bumps, inclines, gravel, grating, or grass covered roads.Anything which generates ultrasonic wave s such as another vehicle's horn, the
engine sound of a motorcycle, the air brake sound of a large-sized vehicle, or
another vehicle's sensors approaches the vehicle.
The vehicle is driven in heavy rain or in road conditions causing water-splash.A commercially-available fender pole or an antenna for a radio transmitter is
installed to the vehicle.
The vehicle is moving towards a tall or square curbstone, or a steep grade.An obstruction is too close to the sensor.The vehicle is moving towards an uneven wall or stairs.There are multiple obstructions.The vehicle is driven in a place with low ceilings.Obstructions under the bumper cannot be detected. Obstructions which are
lower than the sensor or thin may not be detected even though they were
detected once.
The following types of obstructions may not be detected:
Thin objects such as wire, rope or polesThings which absorb sonic waves easily such as cotton or snowAngular shaped objectsVery tall objects, and those which are wide at the topSmall, short objectsAlways have the system inspected at an Authorized Mazda Dealer if any shock is
applied to the bumpers, even in a minor accident. If the sensors are deviated, they
cannot detect obstructions.
When Driving
Pa r k i n g S e n s o r Sys te m
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The system may have a malfunction if a sound is not activated or the detection
indication is not displayed even when the parking sensor OFF switch is pressed
and the parking sensor is operable. Have your vehicle inspected by an Authorized
Mazda Dealer.
The system may have a malfunction if th e indicator light does not turn on even
when the parking sensor OFF switch is turned on. Have your vehicle inspected by
an Authorized Mazda Dealer.
The system may have a malfunction if a message indicating a system malfunction is
displayed. Have your vehicle inspected by an Authorized Mazda Dealer.
A message may be displayed even when the ambient temperature is extremely
cold, or mud, ice, or snow adheres to the sensor area. Remove any foreign matter
from the sensor area.
▼ Sensor Detection Range
The sensors detect obstructions within the following range.

1. Front ultrasonic sensor detection range
2. Rear corner/Rear side ultrasonic sensor detection range
3. Rear ultrasonic sensor detection range
4. Front corner ultrasonic sensor detection range
A
: About 55.0 cm (About 21.6 in)
B : About 150 cm (About 59.0 in)
C : About 100 cm (About 39.3 in)

When Driving
Pa r k i n g S e n s o r Sys te m
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DisplayDistance between vehicle and obstruc-
tion
Without 360° view monitor
With 360° viewmonitor Front ultrasonic
sensor
*/Front cor-
ner ultrasonic sen-
sor
*
Rear ultrasonic sen-sor/Rear corner ul- trasonic sensor/
Rear side ultrasonic
sensor
*
Without front ul-trasonic sensor
and front corner
ultrasonic sensor With front ultra-
sonic sensor and
front corner ultra-
sonic sensor
RedFront ultrasonic sen-
sor:
Within approx. 35.0
cm (13.7 in)
Front corner ultra- sonic sensor:
Within approx. 25 cm (9.8 in) Rear ultrasonic sen-
sor:
Within approx. 35.0 cm (13.7 in)
Rear corner ultra-
sonic sensor/Rear
side ultrasonic sen-
sor:
Within approx. 25
cm (9.8 in)
▼Parking Sensor OFF Switch
When the switch is pressed, the
parking sensor is stopped and the
indicator light turns on.
If the switch is pressed again, the
parking sensor becomes operational
and the indicator light turns o
ff.
1. Indicator light
NOTE
(Automatic vehicle)
The detection indicator and buzzer
of the front ultrasonic sensors/front
corner ultrasonic sensors do not
operate when the selector lever is in
the P position.
The detection indicator and buzzer
sound do not activate when the
parking brake is applied.
When Driving
Pa r k i n g S e n s o r Sys te m
4-242*Some models.
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