sensor MAZDA MODEL 3 HATCHBACK 2020 (in English) Service Manual

â–¼Pre-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 4-155
Reverse driving
Smart Brake Support [Rear]
(SBS-R).................................... page 4-157
Smart Brake Support [Rear Crossing]
(SBS-RC).................................. page 4-161
â–¼Camera 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 Sens
ing Camera (FSC).
ï‚·High Beam Control system (HBC)
ï‚·Lane Departure Warning System
(LDWS)
ï‚·Traffic Sign Recognition System (TSR)
ï‚·Distance & Speed Alert (DSA)
ï‚·Driver Attention Alert (DAA)
ï‚·Driver Monitoring (DM)
ï‚·Mazda Radar Cruise Control (MRCC)
ï‚·Mazda Radar Cruise Control with Stop
& Go function (MRCC with Stop & Go
function)
ï‚·Lane-keep Assist System (LAS)
ï‚·Traffic Jam Assist (TJA)
ï‚·Smart Brake Support (SBS)
The Forward Sensin g Camera (FSC) is
installed at the top of the windshield near
the rearview mirror.
Refer to Forward Sensing Camera (FSC)
on page 4-200.
Front radar sensor
The front radar sensor detects radio waves
reflected off a vehicle ahead sent from the
radar sensor. The following systems use
the front radar sensor.
ï‚·Distance & Speed Alert (DSA)
ï‚·Mazda Radar Cruise Control (MRCC)
ï‚·Mazda Radar Cruise Control with Stop
& Go function (MRCC with Stop & Go
function)
ï‚·Traffic Jam Assist (TJA)
ï‚·Smart Brake Support (SBS)
The front radar sensor is mounted behind
the radiator grille.
Refer to Front Radar Sensor on page
4-204.
Front side radar sensor
The front side radar sensors detects radio
waves reflected off a vehicle ahead sent
from the radar sensor. The following
systems use the front side radar sensor.
ï‚·Front Cross Traffic 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
4-206.
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Rear side radar sensor
The rear side radar sensors detects radio
waves reflected off a vehicle approaching
from the rear or an obstruction sent from
the radar sensors. The following systems
use the rear side radar sensor.
ï‚·Blind Spot Monitoring (BSM)
ï‚·Rear Cross Traffic Alert (RCTA)
ï‚·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
4-208.
Rear/rear corner/rear side ultrasonic
sensor
The ultrasonic sensor detects ultrasonic
waves reflected off obstructions at the rear
sent from the ultr asonic sensors. The
following systems use the ultrasonic
sensor.
ï‚·Smart Brake Support [Rear] (SBS-R)
ï‚·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 4-209.
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 4-210.
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.
ï‚·Driver Monitoring (DM)
The driver monitoring camera is mounted
in the center display.
Refer to Driver Monitoring Camera on
page 4-211.
â–¼ i-ACTIVSENSE Status Symbol
(Warning/Risk Avoidance Support
System)
*
The system notifies t
he 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).
ï‚·Lane Departure Warning System
(LDWS)
ï‚·Blind Spot Monitoring (BSM)
ï‚·Distance & Speed Alert (DSA)
ï‚·Front Cross Traffic Alert (FCTA)
ï‚·Rear Cross Traffic Alert (RCTA)
ï‚·Lane-keep Assist System (LAS)
NOTE
The status of the system turned on using
the personalization feature is displayed.
When Driving
i-ACTIVSENSE
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ï‚·The vehicle speed is about 10 km/h
(6.3 mph) or faster.
ï‚·The BSM will not operate under the
following circumstances.
ï‚·The vehicle speed falls below about
10 km/h (6.3 mph) even though the
i-ACTIVSENSE warning indication/
warning light is turned off.
ï‚·The shift lever (manual transmission)/
selector lever (automatic
transmission) is shifted to reverse (R)
and the vehicle is reversing.
ï‚·The turning radius is small (making a
sharp turn, turning at intersections).
ï‚·In the following cases, the
i-ACTIVSENSE warning indication/
warning light turns on and operation of
the system is stopped. If the
i-ACTIVSENSE warning indication/
warning light remains illuminated, have
the vehicle inspected at an Authorized
Mazda Dealer as soon as possible.
ï‚·Some problem with the system
including the BSM warning indicator
lights is detected.
ï‚·A large deviation in the installation
position of a rear side radar sensor on
the vehicle has occurred.
ï‚·There is a large accumulation of snow
or ice on the rear bumper near a rear
side radar sensor. Remove any snow,
ice or mud on the rear bumper.
ï‚·Driving on snow-covered roads for
long periods.
ï‚·The temperature near the rear side
radar sensor becomes extremely hot
due to driving for long periods on
slopes during the summer.
ï‚·The battery voltage has decreased.
ï‚·Under the following conditions, the rear
side radar sensor cannot detect target
objects or it may be difficult to detect
them.
ï‚·The rear bumper around the rear side
radar sensor is deformed.
ï‚·Radio wave interference from a radar
sensor equipped on a nearby vehicle.
ï‚·The approaching vehicle is 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.
ï‚·A vehicle is in the detection area at
the rear in an adjacent driving lane
but it does not approach. The BSM
determines the condition based on
radar detection data.
ï‚·A vehicle is traveling alongside your
vehicle at nearly the same speed for
an extended period of time.
ï‚·Vehicles approaching in the opposite
direction.
ï‚·A vehicle in an adjacent driving lane
is attempting to pass your vehicle.
ï‚·A vehicle is in an adjacent lane on a
road with extremely wide driving
lanes. The detection area of the rear
side radar sensor is set at the road
width of expressways.
ï‚·In the following case, the flashing of the
BSM warning in dicator light, and the
activation of the warning sound and the
warning screen indicator display may
not occur or they may be delayed.
ï‚·A vehicle makes a lane change from a
driving lane two lanes over to an
adjacent lane.
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ï‚·Driving on steep slopes.
ï‚·Crossing the summit of a hill or
mountain pass.
ï‚·When there is a difference in the
height between your driving lane and
the adjacent lane.
ï‚·Directly after the BSM system
becomes operable by changing the
setting.
ï‚·If the road width is extremely narrow,
vehicles two lanes over may be detected.
The detection area of the rear side radar
sensor is set according to the road width
of expressways.
ï‚·The BSM warning indicator light may
turn on and the vehicle detection screen
may be displayed in the display in
reaction to stationary objects
(guardrails, tunnels, sidewalls, and
parked vehicles) on the road or the
roadside.
1. Objects such as guardrails andconcrete walls running alongside the
vehicle.

1. Places where the width between guardrails or walls on each side of
the vehicle narrows.

1. The walls at the entrance and exits of tunnels, turnouts.

ï‚·A BSM warning indicator light may
flash or the warning beep may be
activated several times when making a
turn at a city intersection.
ï‚·Turn off the BSM while pulling a trailer
or while an accessory such as a bicycle
carrier is installed to the rear of the
vehicle. Otherwise, the radar’s radio
waves will be blocked causing the
system to not operate normally.
ï‚·In the following cases, it may be difficult
to view the illumination/flashing of the
BSM warning indicator lights equipped
on the door mirrors.
ï‚·Snow or ice is adhering to the door
mirrors.
ï‚·The front door glass is fogged or
covered in snow, frost or dirt.
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ï‚·The rear side radar sensor of the BSM
may be regulated under the radio wave
related laws of the country where the
vehicle is driven. If this system is used
abroad, it may be necessary to turn off
the system.
Refer to Rear Side Radar Sensor on
page 4-208.
ï‚·The system switches to the Rear Cross
Traffic Alert (RCTA) function when the
shift lever (manual transmission) or the
selector lever (automatic transmission)
is shifted to the reverse (R) position.
Refer to Rear Cross Traffic Alert
(RCTA) on page 4-114.
â–¼ Blind Spot Monitoring (BSM)
Warning Indicator Lights/Display
Indicator/Blind Spot Monitoring
(BSM) Warning Beep
The BSM system notifies the driver of the
presence of vehicles in adjacent lanes or at
the rear of the vehicle using the BSM
warning indicator light
, the warning sound
and the display indica tor while the systems
are operational.
BSM warning indicator lights
The BSM warning indicator lights are
equipped on the left and right door
mirrors. The warning indicator lights turn
on when a vehicle approaching from the
rear in an adjacent lane is detected.
When the ignition is switched ON, the
warning indicator light turns on
momentarily and then turns off after a few
seconds.
Function for cancelling illumination
dimmer
If the BSM warning i ndicator lights turn
on when the parking lights are turned on,
the brightness of the BSM warning
indicator lights is dimmed.
If the BSM warning i ndicator lights are
difficult to see due to glare from
surrounding brightness when traveling on
snow-covered roads or under foggy
conditions, press the dimmer cancellation
button to cancel the dimmer and increase
the brightness of BSM warning indicator
lights when they turn on.
Refer to Dashboard Illumination on page
4-18.
Display indicator
The detected approaching vehicle and
warning are displayed in the
multi-information display and active
driving display (vehicles with active
driving display).
Multi-information Display
When Driving
i-ACTIVSENSE
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â–¼Traffic Sign Display Indication
The following traffic signs are displayed
on the active driving display/instrument
cluster.
Speed limit signs
Do not enter signs
Stop signs
NOTE
Speed limit signs
ï‚·When the vehicle speed is about 1 km/h
(0.6 mph) or faster, the speed limit sign
is displayed when any one of the
following conditions are met.
ï‚·The Forward Sensing Camera (FSC)
recognizes a speed limit sign as a sign
targeted for your vehicle and the
vehicle passes it.
ï‚·The speed limit sign stored in the
navigation system is read.
ï‚·In the following cases, display of the
speed limit sign stops.
ï‚·Each sensor determines that the
vehicle has changed direction of
travel.
ï‚·The Forward Sensing Camera (FSC)
recognizes a new speed limit sign
which differs from the previous one
(displays the new speed limit sign).
ï‚·The speed limit sign stored in the
navigation system is not read within a
certain period of time (if the Forward
Sensing Camera (FSC) does not
recognize a speed limit sign, the speed
limit sign stored in the navigation
system is displayed).
ï‚·The vehicle speed exceeds the
displayed speed limit sign by 30 km/h
(19 mph) or more after a certain
period of time has elapsed since the
speed limit sign
was displayed.
(Except when there is information for
the speed limit sign in the navigation
system)
Do not enter signs
ï‚·A do not enter sign is displayed when all
of the following conditions are met.
ï‚·The vehicle speed is about 60 km/h
(37 mph) or slower.
ï‚·The Forward Sensing Camera (FSC)
recognizes a do not enter sign as a
sign targeted for your vehicle and the
vehicle passes it.
ï‚·When the Forward Sensing Camera
(FSC) recognizes the do not enter sign
and a certain period of time has elapsed
since the vehicle passed the sign, display
of the do not enter sign stops.
Stop sign
ï‚·A stop sign is displayed when all of the
following conditions are met:
ï‚·The vehicle speed is about 65 km/h
(40 mph) or slower.
ï‚·The Forward Sensing Camera (FSC)
recognizes a stop sign as a sign
targeted for your vehicle.
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NOTE
ï‚·The system may operate under the
following conditions even if a vehicle is
not approaching.
ï‚·An object that reflects the radio waves
of the radar such as a parked vehicle,
guardrail, or wall is directly next to
your vehicle.
ï‚·Vehicles are stopped in the area
around your vehicle such as during
heavy traffic.
ï‚·A vehicle approaching from the front
or side of your vehicle slows down.
ï‚·A vehicle approaching from the front
or left side of your vehicle makes a
right or left turn directly in front of
your vehicle.
ï‚·A vehicle or pedestrian moves in the
parking lot or on the sidewalk in the
area surrounding your vehicle.
ï‚·After making a left or right turn, an
on-coming vehicle is present.
ï‚·When passing an on-coming vehicle.
ï‚·A vehicle overtakes your vehicle while
it is stopped.
ï‚·Your vehicle is in an area where
strong radio waves or electrical noise
may occur such as near a television
tower or power plant.
ï‚·Under the following conditions, the front
side radar sensor cannot detect
approaching vehicles or it might be
difficult to detect them, and the system
may not operate normally.
ï‚·The front side radar sensor detection
area is obstructed by a nearby wall or
vehicle.
ï‚·Directly after the system becomes
operable.
ï‚·Radio wave interference from a radar
sensor equipped on a nearby vehicle.
ï‚·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
ï‚·A vehicle suddenly enters the
detection area from the front or side of
your vehicle.
ï‚·A vehicle that has stopped suddenly
starts to move.
ï‚·Multiple objects move at the same
time.
ï‚·The vehicle is driven in bad weather
conditions such as heavy rain, fog,
snow, or sand storms.
ï‚·The vehicle is driven on a sharp curve
or on bumpy roads.
ï‚·An object that reflects the radio waves
of the radar such as a parked vehicle,
guardrail, or wall is directly next to
your vehicle.
ï‚·A vehicle approaches while turning
(Such as roundabout)
ï‚·The vehicle is driven at an extremely
slow speed.
ï‚·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.
ï‚·Some problem with the system has
occurred.
When Driving
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ï‚·The front side radar sensor
installation position is greatly
deviated.
ï‚·There is a large accumulation of snow
or ice on the front bumper near a front
side radar sensor.
ï‚·The temperature near the radar
sensors becomes extremely hot due to
driving for a long time on slopes
during the summer.
ï‚·The battery voltage has decreased.
ï‚·The front side radar sensor of the
FCTA may be regulated under the
radio wave related laws of the country
where the vehicle is driven. If this
system is used abroad, it may be
necessary to turn off the system.
Refer to Front Side Radar Sensor on
page 4-206.
â–¼ Canceling Operation of Front Cross
Traffic Alert (FCTA)
The FCTA can be set to inoperable.
ï‚·(If only the FCTA is turned off)
Refer to the Settings section in the
Mazda Connect Owner's Manual.
ï‚·(If the FCTA is turned off by
operating the i-ACT
IVSENSE switch)
Refer to i-ACTIVSENSE Switch on
page 4-87.
NOTE
If the ignition is switched OFF while you
have canceled the system using the
i-ACTIVSENSE swit ch, 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.
Rear Cross Traffic Alert
(RCTA)
*
â–¼Rear Cross Traffic Alert (RCTA)
The RCTA system is des
igned to assist the
driver in checking the area to the rear left
and right sides of your vehicle while your
vehicle is reversing by alerting the driver
to the presence of vehicles approaching
the rear of your vehicle.
The RCTA system detects vehicles
approaching from the rear left and right
sides of your vehicle and the rear of your
vehicle while your vehicle is being
reversed out of a parking space, and
notifies the driver of possible danger using
the Blind Spot Monitoring (BSM) warning
indicator lights and the warning buzzer.
1. Your vehicle
2. Detection areas
When Driving
i-ACTIVSENSE
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ï‚·A vehicle approaching from the rear
left and right side of your vehicle
slows down.
ï‚·A vehicle approaching from the rear
left and right side of your vehicle
makes a right or left turn directly in
front of your vehicle.
ï‚·A vehicle overtakes your vehicle while
it is stopped.
ï‚·Your vehicle is in an area where
strong radio waves or electrical noise
may occur such as near a television
tower or power plant.
ï‚·In the following cases, the
i-ACTIVSENSE warning indication/
warning light turns on and operation of
the system is stopped. If the
i-ACTIVSENSE warning indication/
warning light remains illuminated, have
the vehicle inspected at an Authorized
Mazda Dealer as soon as possible.
ï‚·Some problem with the system
including the Blind Spot Monitoring
(BSM) warning indicator lights has
occurred.
ï‚·A large deviation in the installation
position of a rear side radar sensor on
the vehicle has occurred.
ï‚·There is a large accumulation of snow
or ice on the rear bumper near a rear
side radar sensor.
ï‚·Driving on snow-covered roads for
long periods.
ï‚·The temperature near the radar
sensors becomes extremely hot due to
driving for long periods on slopes
during the summer.
ï‚·The battery voltage has decreased.
ï‚·Under the following conditions, the rear
side radar sensor cannot detect
approaching vehicles or it might be
difficult to detect them, and the system
may not operate normally.
ï‚·The vehicle speed when reversing is
about 15 km/h (9 mph) or faster.
ï‚·The rear side radar sensor detection
area is obstructed by a nearby wall or
parked vehicle. (Reverse the vehicle to
a position where the radar sensor
detection area is no longer
obstructed.)
1. Your vehicle
ï‚·A vehicle is approaching directly from
the rear of your vehicle.
1. Your vehicle
ï‚·The vehicle is parked at an angle.
1. Your vehicle

When Driving
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ï‚·Directly after the RCTA system
becomes operable using the
personalization feature.
ï‚·Radio wave interference from a radar
sensor equipped on a nearby parked
vehicle.
ï‚·In the following cases, it may be difficult
to view the illumination/flashing of the
Blind Spot Monitoring (BSM) warning
indicator lights equipped on the door
mirrors.
ï‚·Snow or ice adheres to the door
mirrors.
ï‚·The front door glass is fogged or
covered in snow, frost or dirt.
ï‚·Turn off the RCTA system while pulling
a trailer or while an accessory such as a
bicycle carrier is installed to the rear of
the vehicle. Otherwise, the radio waves
emitted by the radar will be blocked
causing the system to not operate
normally.
ï‚·The rear side radar sensor of the RCTA
may be regulated under the radio wave
related laws of the country where the
vehicle is driven. If this system is used
abroad, it may be necessary to turn off
the system.
Refer to Rear Side Radar Sensor on
page 4-208.
â–¼Canceling Operation of Rear Cross
Traffic Alert (RCTA)
The RCTA can be set to inoperable.
ï‚·(If only the RCT
A is turned off)
Refer to the Settings section in the
Mazda Connect Owner's Manual.
ï‚·(If the RCTA is turned off by
operating the i-ACTIVSENSE switch)
Refer to i-ACTIV SENSE Switch on
page 4-87.
NOTE
If the ignition is switched OFF while you
have canceled the system using the
i-ACTIVSENSE 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.
When Driving
i-ACTIVSENSE
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