sensor MAZDA MAZDA 2023 Service Manual

NOTE
The headlights and other exterior lights may not turn off immediately even if the
surrounding area becomes well-lit because the light sensor determines that it is
night time if the surrounding area is cont inuously dark for several minutes such as
inside long tunnels, traffic jams inside tunnels, or in indoor parking lots.
If the headlight switch and the windshie ld wiper switch are in AUTO, and the
wipers are operated at low or high speed by the auto wiper control for several
seconds, bad weather conditions are determined and the headlights may be
turned on.
The sensitivity of the auto-light control may be changed.
Refer to the Settings section in the Mazda Connect Owner's Manual.
▼Headlight High-Low Beam
The headlights switch between high
and low beams by moving the lever
forward or backward.

1. High beam
2. Low beam

When the headlight high-beams are
on, the headlight high-beam indicator
light is turned on.

▼ Flashing the Headlights
When the ignition is switched ON, and
regardless of the headlight position,
the headlights switch to high beams
while the lever is being pulled.

1. OFF
2. Headlight flashing

The headlight high-beam indicator
light in the instrument cluster
illuminates simultaneously. The lever
will return to the normal position when
released.

When Driving
Switches and Controls
4-60
Mazda3_8LC2-EA-22G_Edition1_new
2022-5-20 11:26:10

Switch Posi-tion Wiper operation
MIST Operation while pulling up lev-
er
OFF Stop
INT Intermittent LO Low speedHI High speed
Variable-speed intermittent wipers
Set the lever to the intermittent
position and choose the interval timing
by rotating the switch.
Rotate the switch upward (FAST
direction) to shorten the interval time
of the wiper operation, and rotate the
switch downward (SLOW direction) to
lengthen it.

1. Switch
With auto-wiper control

1. Indicator light
Switch Posi- tion Wiper operation
MIST Operation while pulling up lev-
er
OFF Stop
AUTO
*1Auto control
LO Low speed HI High speed
*1 When the wiper lever is switched to the AUTO position, the indicator light turns on.
Auto-wiper control*
When the wiper lever is in the AUTO
position, the rain sensor senses the
amount of rainfall on the windshield
and turns the wipers on or off
automatically (off ―intermittent―low
speed ―high speed).

The sensitivity of the rain sensor can be
adjusted by turning the switch on the
wiper lever.
From the center position (normal),
rotate the switch upward (+ direction)
for higher sensitivity (faster response)
or rotate it downward (- direction) for
less sensitivity (slower response).

1. Switch
2. Higher sensitivity
3. Center position
4. Less sensitivity
When Driving
Switches and Controls
*Some models.4-65
Mazda3_8LC2-EA-22G_Edition1_new 2022-5-20 11:26:10

CAUTION
Do not shade the rain sensor by
adhering a sticker or a label on the
windshield. Otherwise the rain
sensor will not operate correctly.
When the ignition is switched ON
and the wiper lever is in the AUTO
position, the windshield wipers may
operate automatically in the
following cases:
 The area of the windshield above
the rain sensor is touched or wiped
with a cloth.
 The windshield or the rain sensor
area in the cabin is hit.
When the ignition is switched ON
and the wiper lever is in the AUTO
position, do not touch the
windshield or the windshield wipers
Otherwise, the windshield wipers
will operate automatically which
could catch your fingers or damage
the windshield wipers.
When removing ice or snow, or
cleaning the windshield, always
make sure the wiper lever is in the
OFF position.
NOTE
Switching the auto-wiper lever from
the OFF to the AUTO position while
driving activates the windshield
wipers once, after which they
operate according to the rainfall
amount.
The auto-wiper control may not
operate when the rain sensor
temperature is about －10 °C (14 °F)
or lower, or about 85 °C (185 °F) or
higher.
If the windshield is coated with
water repellent, the rain sensor may
not be able to sense the amount of
rainfall correctly and the auto-wiper
control may not operate properly.
If dirt or foreign matter (such as ice
or matter containing salt water)
adheres to the windshield above the
rain sensor, or if the windshield is
iced, it could cause the wipers to
move automatically. However, if the
wipers cannot remove this ice, dirt or
foreign matter, the auto-wiper
control will stop operation. In this
case, set the wiper lever to the low
speed position or high speed
position for manual operation, or
remove the ice, dirt or foreign matter
by hand to restore the auto-wiper
operation.
If the auto-wiper lever is left in the
AUTO position, the wipers could
operate automatically from the effect
of strong light sources,
electromagnetic waves, or infrared
light because the rain sensor uses an
optical sensor. It is recommended
that the auto-wiper lever be
switched to the OFF position other
than when driving the vehicle under
rainy conditions.
When Driving
Switches and Controls
4-66
Mazda3_8LC2-EA-22G_Edition1_new 2022-5-20 11:26:10

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 4-101
High Beam Control System
(HBC).............................. page 4-101
Left/right side and rear side detection
Lane Departure Warning System
(LDWS)............................ page 4-103
Blind Spot Monitoring (BSM)...............
........................................ page 4-107
Road sign recognition
Traffic Sign Recognition System
(TSR)................................ page 4-112
Inter-vehicle distance recognition
Distance & Speed Alert (DSA) .............
........................................ page 4-118
Front obstruction detection when
approaching a crosswalk
Front Cross Traffic Alert (FCTA) ............
........................................ page 4-123
Rear obstruction detection when
leaving a parking space
Rear Cross Traffic Alert (RCTA) .............
........................................ page 4-126
Full-surround recognition
360° View Monitor........... page 4-177
Driver fatigue detection
Driver Attention Alert (DAA) ...............
........................................ page 4-119
Driver Monitoring (DM).... page 4-121
Driver support systems
Inter-vehicle distance
Mazda Radar Cruise Control
(MRCC)........................... page 4-130
Mazda Radar Cruise Control with Stop
& Go function (MRCC with Stop & Go
function).......................... page 4-139
Lane departure
Lane-keep Assist System (LAS) .............
........................................ page 4-164
Inter-vehicle distance and lane
keeping
Traffic Jam Assist (TJA)........ page 4-150
When Driving
i-ACTIVSENSE
4-96*Some models.
Mazda3_8LC2-EA-22G_Edition1_new
2022-5-20 11:26:10

▼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
Smart Brake Support (SBS) ..................
........................................ page 4-168
▼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 ffi c
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)Traffic Jam Assist (TJA)Smart Brake Support (SBS) forward
drive detection
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 4-211.
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.
Distance & Speed Alert (DSA)Mazda Radar Cruise Control
(MRCC)
Mazda Radar Cruise Control with
Stop & Go function (MRCC with
Stop & Go function)
Traffic Jam Assist (TJA)Smart Brake Support (SBS) forward
drive detection
The front radar sensor is mounted
behind the radiator grille.
Refer to Front Radar Sensor on page
4-215.
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.
Front Cross Tra ffi c 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 4-218.
When Driving
i-ACTIVSENSE
4-97
Mazda3_8LC2-EA-22G_Edition1_new 2022-5-20 11:26:10

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 Traffic Alert (RCTA)Smart Brake Support (SBS) reverse
drive detection
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 4-219.
Rear/rear corner ultrasonic sensor
The ultrasonic sensor detects ultrasonic
waves reflected
off obstructions at the
rear sent from the ultrasonic sensors.
The following systems use the
ultrasonic sensor.
Smart Brake Support (SBS) reverse
drive detection
The ultrasonic sensors are mounted in
the rear bumper.
Refer to Rear/Rear corner Ultrasonic
Sensor on page 4-221.
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 4-221.
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 4-222.
▼ i-ACTIVSENSE Status Symbol
(Warning/Risk Avoidance Support
System)
*
The system notifies 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 Traffic Alert (FCTA)Rear Cross Traffic 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
4-98*Some models.
Mazda3_8LC2-EA-22G_Edition1_new
2022-5-20 11:26:10

The BSM will not operate under the
following circumstances.
The vehicle speed falls below
about 10 km/h (6.3 mph) even
though the i-ACTIVSENSE warning
indication/warning light is turnedoff.
The shift lever (manual
transmission)/selector lever
(automatic transmission) is shifted
to reverse (R) and the vehicle is
reversing.
The turning radius is small (making
a sharp turn, turning at
intersections).
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.
Some problem with the system
including the BSM warning
indicator lights is detected.
A large deviation in the installation
position of a rear side radar sensor
on the vehicle has occurred.
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.
Driving on snow-covered roads for
long periods.
The temperature near the rear side
radar sensor becomes extremely
hot due to driving for long periods
on slopes during the summer.
The battery voltage has decreased.Under the following conditions, the
rear side radar sensor cannot detect
target objects or it may be difficult to
detect them.
The rear bumper around the rear
side radar sensor is deformed.
Radio wave interference from a
radar sensor equipped on a nearby
vehicle.
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.
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.
A vehicle is traveling alongside
your vehicle at nearly the same
speed for an extended period of
time.
Vehicles approaching in the
opposite direction.
A vehicle in an adjacent driving
lane is attempting to pass your
vehicle.
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.
In the following case, the flashing of
the BSM warning indicator light, and
the activation of the warning sound
and the warning screen indicator
display may not occur or they may be
delayed.
A vehicle makes a lane change
from a driving lane two lanes over
to an adjacent lane.
Driving on steep slopes.Crossing the summit of a hill or
mountain pass.
When Driving
i-ACTIVSENSE
4-108
Mazda3_8LC2-EA-22G_Edition1_new 2022-5-20 11:26:10

When there is a difference in the
height between your driving lane
and the adjacent lane.
Directly after the BSM system
becomes operable by changing the
setting.
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.
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.

A BSM warning indicator light may
flash or the warning beep may be
activated several times when making
a turn at a city intersection.
Tu r n 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.
In the following cases, it may be
difficult to view the
illumination/
flashing of the BSM warning
indicator lights equipped on the
door mirrors.
Snow or ice is adhering to the door
mirrors.
The front door glass is fogged or
covered in snow, frost or dirt.
When Driving
i-ACTIVSENSE
4-109
Mazda3_8LC2-EA-22G_Edition1_new 2022-5-20 11:26:10

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 4-219.
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 4-126.
▼ 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
indicator 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 canceling illumination
dimmer
If the BSM warning indicator lights turn
on when the parking lights are turned
on, the brightness of the BSM warning
indicator lights is dimmed.
If the BSM warning indicator 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 4-24.
Display indicator
The detected approaching vehicle and
warning are displayed in the
multi-information display and active
driving display.
Multi-information Display
When Driving
i-ACTIVSENSE
4-110
Mazda3_8LC2-EA-22G_Edition1_new
2022-5-20 11:26:10

▼Traffic 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
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.
The Forward Sensing Camera (FSC)
recognizes a speed limit sign as a
sign targeted for your vehicle and
the vehicle passes it.
The speed limit sign stored in the
navigation system is read.
In the following cases, display of the
speed limit sign stops.
Each sensor determines that the
vehicle has changed direction of
travel.
The Forward Sensing Camera (FSC)
recognizes a new speed limit sign
which differs from the previous
one (displays the new speed limit
sign).
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).
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
A do not enter sign is displayed
when all of the following conditions
are met.
The vehicle speed is about 60
km/h (37 mph) or slower.
The Forward Sensing Camera (FSC)
recognizes a do not enter sign as a
sign targeted for your vehicle and
the vehicle passes it.
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
A stop sign is displayed when all of
the following conditions are met:
The vehicle speed is about 65
km/h (40 mph) or slower.
The Forward Sensing Camera (FSC)
recognizes a stop sign as a sign
targeted for your vehicle.
When a certain period of time has
elapsed since the stop sign was
displayed, display of the stop sign
stops.
When Driving
i-ACTIVSENSE
4-115
Mazda3_8LC2-EA-22G_Edition1_new 2022-5-20 11:26:10