Page 217 of 608
•It may be difficult to hear the LDWS
warning beep depending on the
surrounding conditions such as outside
noise.
•The volume of the LDWS warning sound
can be changed.
Refer to Personalization Features on
page 9-9.
•The type of warning sound (rumble*1/
beep) on the LDWS can be changed.
Refer to Personalization Features on
page 9-9.
*1 A rumble strip is a series of grooves in the road pavement surface positioned
at specific intervals, and when the
vehicle passes over it a vibration and
rumble sound is produced which alerts
the driver that the vehicle is departing
from the lane.
The rumble sound is a reproduction of
the sound which occurs when a vehicle
passes over a rumble strip.
Rumble
Groove
When Driving
i-ACTIVSENSE
4-89
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 218 of 608

Blind Spot Monitoring (BSM)*
The BSM is designed to assist the driver in checking the area to the rear of the vehicle on
both sides during lane changes b y notifying the driver of the presence of vehicles
approaching from the rear in an adjacent lane.
The BSM detects vehicles approaching from the rear while traveling in the forward
direction at a speed of 10 km/h (6.3 mph) or faster and notifie s the driver by turning on the
BSM warning indicator light and displaying the vehicle detectio n screen (vehicles with
active driving display).
If the turn signal lever is operated to signal a turn in the di rection in which the BSM
warning indicator light is illuminated while the approaching ve hicle is detected, the BSM
notifies the driver of possible danger by turning on the BSM wa rning indicator light, and by
activating the warning sound and the warning screen indicator d isplay (vehicles with active
driving display).
The detection area on this system covers the driving lanes on b oth sides of the vehicle and
from the rear part of the front doors to about 50 m (164 ft) behind the vehicle.
Detection areas
Your vehicle
WA R N I N G
Always check the surrounding area visually before making an actual lane change:
The system is only designed to assist you in checking for vehicles at your rear when making a
lane change. Due to certain limitations with
the operation of this system, the BSM warning
indicator light, the warning sound and the warn ing screen indicator display may not activate
or they might be delayed even though a vehicle is in an adjacent driving lane. Always make it
your responsibility as a driver to check the rear.
When Driving
i-ACTIVSENSE
4-90*Some models.
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 219 of 608

NOTE
•The BSM will operate when all of the following conditions are met:
•The ignition is switched ON.
•The BSM OFF indicator light in the instrument cluster is turned off.
•The vehicle speed is about 10 km/h (6.3 mph) or faster.
•The BSM will not operate under the following circumstances.
•The vehicle speed falls below about 10 km/h (6.3 mph) even though the BSM OFF
switch indicator light is turned off.
•The shift lever (manual transaxle)/selector lever (automatic transax le) is shifted to R
position and the vehicle is reversing.
•The turning radius is small (making a sharp turn, turning at intersections).
•In the following cases, the BSM OFF indicator light turns on and operation of the system
is stopped. If the BSM OFF indicator light re mains 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 radar sensor (rear) on the vehicle has
occurred.
•There is a large accumulation of snow or ice on the rear bumper near a radar sensor
(rear). Remove any snow, ice or mud on the rear bumper.
•Driving on snow-covered roads for long periods.
•The temperature near the radar sensors (rear) becomes extremely hot due to driving for
long periods on slopes during the summer.
•The battery voltage has decreased.
•Under the following conditions, the radar sensors (rear) cannot detect target objects or it
may be difficult to detect them.
•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 radar sensors (rear) is set at the road width of expressways.
•In the following case, the flashing of the BS M 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
4-91
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 220 of 608

•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 radar sensors (rear) 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.
Objects such as guardrails and concrete walls
running alongside the vehicle. Places where the width between guardrails or
walls on each side of the vehicle narrows.
The walls at the entrance and exits of tunnels,
turnouts.
•A BSM warning indicator ligh
t may flash or the warning beep and the warning screen
indicator display may be activated several times when making a turn at a city
intersection.
•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. Otherwis e, 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.
•The radar sensors (rear) of the BSM may be regulated under the radio wave related laws
of the country where the vehicle is driven. The sensors in this system are approved for use
in the U.S.A. (including territories), Canada, and Mexico. If a vehicle with a BSM is
driven in a country other than the U.S.A., Canada, or Mexico, the system has to be turned
off using the BSM OFF switch.
•The system switches to the Re ar Cross Traffic Alert function when the shift lever (manual
transaxle) or the selector lever (automatic tr ansaxle) is shifted to the reverse (R) position.
Refer to Rear Cross Traffic Alert (RCTA) on page 4-104.
When Driving
i-ACTIVSENSE
4-92
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 221 of 608

▼Blind Spot Monitoring (BSM) Warning Indicator Lights/Blind Spot
Monitoring
(BSM) Warning Beep
The BSM or Rear Cross Traffic Ale rt (RCTA) 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 (vehicles wi th active driving display)
(BSM) while the systems are operational.
BSM warning indicator lights
The BSM warning indicator lights are equipped on the left and r ight 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 O N, the warning indicator light turns on momentarily and
then turns off after a few seconds.
Forward driving (BSM operation)
The BSM detects vehicles approaching from the rear and turns on the BSM warning
indicator lights equipped on the door mirrors according to the conditions. Additionally,
while a BSM warning indicator li ght is illuminated, if the turn signal lever is operated to
signal a turn in the direction in which the BSM warning indicat or light is illuminated, the
BSM warning indica tor light flashes.
Reverse driving (Rear Cross Traf fic Alert (RCTA) system operation)
The Rear Cross Traffic Alert (RCTA) system detects vehicles app roaching from the left and
right of your vehicle and flashes the BSM warning indicator lig hts.
When Driving
i-ACTIVSENSE
4-93
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 222 of 608

Function for cancelling 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 can cel the dimmer and increase the brightness of BSM
warning indicator lights when they turn on.
Refer to Dashboard Illumination on page 4-17.
Display indicator (Vehicles with active driving display)
The detected approaching vehicle and warning are displayed in t he active driving display
when the vehicle is moving forward (BSM operational).
The detected direction is displayed with a detection indicator (white) when an approaching
vehicle is detected. In addition , if the turn signal lever is o perated to signal a lane change
while the vehicle is detected, the display changes the color (a mber) of the warning indicator.
BSM warning beep
The BSM warning beep is activated simultaneously with the flash ing of a BSM warning
indicator light.
When Driving
i-ACTIVSENSE
4-94
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 223 of 608

▼Canceling Operation of Blind Spot
Monitoring (BSM)
The BSM and Rear C
ross Traffic Alert
(RCTA) systems are turned off and the
BSM OFF indicator light in the instrument
cluster turns on.
Vehicles with BSM OFF switch
When the BSM OFF swi tch is pressed, the
BSM and Rear Cross Traffic Alert
(RCTA) systems are turned off and the
BSM OFF indicator light in the instrument
cluster turns on.
If the switch is pressed again, the BSM
and Rear Cross Traffic Alert (RCTA)
systems become operable and the BSM
OFF indicator li ght turns off.
NOTE
When the ignition is switched OFF, the
system status before it was turned off is
maintained. For exampl e, if the ignition is
switched OFF while the BSM and Rear
Cross Traffic Alert (RCTA) systems are
operable, the BSM and Rear Cross Traffic
Alert (RCTA) systems remain operable the
next time the ignition is switched ON.
Vehicles without BSM OFF switch
The BSM system can be set to inoperable.
Refer to Personalization Features on page
9-9.
When the BSM is set to inoperable, the
BSM and Rear Cross Traffic Alert
(RCTA) systems are turned off and the
BSM OFF indicator ligh t in the instrument
cluster turns on.
NOTE
When the ignition is switched OFF, the
system status before it was turned off is
maintained. For exampl e, if the ignition is
switched OFF while the BSM and Rear
Cross Traffic Alert (RCTA) systems are
operational, the BSM and Rear Cross
Traffic Alert (RCTA) systems remain
operational the next time the ignition is
switched ON.
When Driving
i-ACTIVSENSE
4-95
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14
Page 224 of 608

Traffic Sign Recognition System (TSR)*
The TSR helps prevent the driver from overlooking traffic signs , and provides support for
safer driving by displaying traffic signs on the active driving display which are recognized
by the Forward Sensing Camera (FSC) or recorded in the navigation system while the
vehicle is driven.
The TSR displays the speed limit , do not enter, and traffic stop signs.
If the vehicle speed exceeds the speed limit sign indicated in the active drivi ng display while
the vehicle is driven, the system notifies the driver using the indication in the active driving
display and a warning sound.
NOTE
•The TSR is not supported in some countries or regions. For information concerning the
supported countries or regions, consult an Authorized Mazda Dealer.
•The TSR operates only if the navigation system SD card (Mazda genuine) is inserted in
the SD card slot. Consult an Authorized Mazda Dealer for details.
Speed limit signs and do not enter signs
When Driving
i-ACTIVSENSE
4-96*Some models.
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14