sensor MAZDA MODEL CX-3 2019 (in English) Owner's Guide

Radar sensors (rear)
The radar sensors (rear) function by detecting the radio waves reflected off a vehicle
approaching from the rear or an obstruction sent from the radar sensors. The following
systems also use the radar sensors (rear).
•Blind Spot Monitoring (BSM)
•Rear Cross Traffic Alert (RCTA)
The radar sensors (rear) are installed inside the rear bumper, one each on the left and right
sides.
Refer to Radar Sensors (Rear) on page 4-138.
When Driving
i-ACTIVSENSE
4-79
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

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

•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

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 (if the Forward Sensing
Camera (FSC) does not recognize a speed limit sign).
•In the following cases, display of the speed limit sign stops.
•The Forward Sensing Camera (FSC) recognizes the speed limit sign and the vehicle is
driven for a certain distance after passing the sign.
•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 30 km/h (19 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
4-99
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

Distance Recognition Support System (DRSS)*
The DRSS measures the distance between your vehicle and a vehicle ahead using a radar
sensor (front) while the vehicle speed is about 30 km/h (19 mph ) or faster, and if your
vehicle approaches a vehicle ahead more closely than what is ap propriate for maintaining
distance between the vehicles according to the vehicle speed, a notification in the active
driving display is indicated to advise you to keep a safe dista nce from the vehicle ahead.
WA R N I N G
Do not rely completely on the DRSS and always drive carefully:
The ability to detect a vehicle ahead is limite d depending on the type of vehicle ahead, the
weather conditions, and the traffic conditions. Therefore, if the accelerator and brake pedals
are not operated correctly it could lead to an accident. Always verify the safety of the
surrounding area and depress the brake pedal or accelerator pedal while keeping a safer
distance from vehicles ahead or on-coming vehicles.
NOTE
•The DRSS operates when all of the following conditions are met:
•The ignition is switched ON.
•The DRSS is on.
•The selector lever is in a position other than reverse (R).
•The vehicle speed is 30 km/h or faster (19 mph or faster).
•The objects which activate the system are 4-wheeled vehicles.
•The DRSS may also operate in the presence of motorcycles and bicycles.
•The DRSS may not operate normally under the following conditions:
•The Dynamic Stability Control (DSC) has a malfunction.
•The vehicle ahead is traveling at an extremely slow speed.
•The system does not operate with the following objects:
•Vehicles approaching in the opposite direction.
•Stationary objects (stopped vehicles, obstructions)
When Driving
i-ACTIVSENSE
4-102*Some models.
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

The RCTA warning indication in the rearview monitor also synchronizes with the Blind
Spot Monitoring (BSM) warning indicator light on the door mirro rs.
WA R N I N G
Always check the surrounding area visually before actually putting the vehicle in reverse:
The system is only designed to assist you in checking for vehicles at the rear when putting the
vehicle in reverse. Due to certain limitations with the operation of this system, the Blind Spot
Monitoring (BSM) warning indicator lights may not flash or it might be delayed even though
a vehicle is behind your vehicl e. Always make it your responsibility as a driver to check the
rear.
NOTE
•In the following cases, the Blind Spot Monitoring (BSM) OFF Indicator Light turns on
and operation of the system is stopped. If the Blind Spot Monitoring (BSM) OFF Indicator
Light remains illuminated, have the vehicle inspected at an Authorized Mazda Dealer as
soon as possible.
•Some problem with the system including the Blind Spot Monitoring (BSM) warning
indicator lights has occurred.
•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).
•Driving on snow-covered roads for long periods.
•The temperature near the radar sensors becomes extremely hot due to driving for long
periods on slopes during the summer.
When Driving
i-ACTIVSENSE
4-105
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

•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.
•The vehicle speed when reversing is about 10 km/h (6 mph) or faster.
•The radar sensor (rear) 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.)
Your vehicle
•A vehicle is approaching directly from the rear of your vehicle.
Your vehicle
•The vehicle is parked on a slant.
Your vehicle
•Directly after the Blind Spot Monitoring (BSM) system becomes operable using the
personalization feature.
•Radio wave interference from a radar sensor equipped on a nearby parked vehicle.
•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.
•Snow or ice adheres to the door mirrors.
•The front door glass is fogged or covered in snow, frost or dirt.
•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 vehicl e. Otherwise, the radio waves emitted by the
radar will be blocked causing the system to not operate normally.
When Driving
i-ACTIVSENSE
4-106
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

Mazda Radar Cruise Control with Stop & Go function(MRCC with Stop & Go function)
*
The MRCC with Stop & Go function system is designed to maintain headway control*1
with a vehicle ahead according to your vehicle's speed using a radar sensor (front) to detect
the distance to the vehicle ahead and a preset vehicle speed without you having to use the
accelerator or brake pedals.
*1 Headway Control: Control of the distance between your vehicle and the vehicle ahead
detected by the Mazda Radar Cr uise Control (MRCC) system.
Additionally, if your vehicle s tarts closing in on the vehicle ahead such as if the vehicle
ahead brakes suddenly, a warning sound and a warning indication in the display are
activated simultaneously to alert you to maintain a sufficient distance between the vehicles.
If the vehicle ahead stops while you are following behind it, your vehicle will stop and be
held stopped automatically (stop hold control), and headway con trol will resume when you
resume driving the vehicle such a s by pressing the RES switch.
Also refer to the following before using the MRCC with Stop & G o function.
•AUTOHOLD (page 4-61)
•Forward Sensing Camera (FSC) (page 4-130)
•Radar sensor (front) (page 4-135)
WA R N I N G
Do not rely completely on the MRCC with Stop & Go function:
The MRCC with Stop & Go function system has detection limitations depending on the type of
vehicle ahead and its conditions, the weat her conditions, and the road conditions.
Additionally, the system may be unable to decelerate sufficiently to avoid hitting the vehicle
ahead if the vehicle ahead applies the brakes sudd enly or another vehicle cuts into the driving
lane, which could result in an accident.
Always drive carefully and verify the surrounding conditions and depress the brake pedal or
accelerator pedal while keeping a safer distance from vehicles ahead or on-coming vehicles.
Do not use the MRCC with Stop & Go function system in the following locations, using the
MRCC with Stop & Go function system at the following locations may result in an unexpected
accident:
 General roads other than highways (Driving under these conditions using the MRCC with
Stop & Go function system is not possible.)
 Roads with sharp curves and where vehicle
traffic is heavy and there is
insufficient space
between vehicles.
When Driving
i-ACTIVSENSE
*Some models.4-107
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

•The driver's seat belt is unfastened.

Under the following conditions, the
MRCC with Stop & Go function cancel
indication is displayed in the active
driving display and a single beep sound is
heard.
•The DSC has operated.
•The Smart Brake Support (SBS) has
operated.
•The Smart City Brake Support (SCBS)
or Advanced Smart City Brake Support
(Advanced SCBS) has operated.
•When traveling on a downslope for a
long period of time.
•There is a problem with the system.
•The engine has stalled.
•The electric parking brake (EPB) is
automatically applied during stop hold
control.
•The radar sensor (front) cannot detect
target objects (during rain, fog, snow or
other inclement weather conditions, or
when the radiator grille is dirty).
Resuming control
If the MRCC with St op & Go function
system is canceled, you can resume
control at the previously set speed by
pressing the RES switch and after all of
the operation conditions have been met.
NOTE
If the set speed is not indicated in the
display, the control does not resume even
if the RES switch is pressed.
Turning off the system
Press the OFF/CANC EL switch two times
while the MRCC with Stop & Go function
system is operating to switch off the
system.
When Driving
i-ACTIVSENSE
4-114
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14

Smart Brake Support (SBS)*
The SBS system alerts the driver of a possible collision using a display and warning sound
if the radar sensor (front) and the Forward Sens ing Camera (FSC) determine that there is the
possibility of a collision with a vehicle ahead while the vehicle is being driven at about 15
km/h or faster (10 mph or faster). Furthermore, if the radar se nsor (front) and the Forward
Sensing Camera (FSC) determines that a collision is unavoidable, the automatic brake
control is performed to reduce d amage in the event of a collision.
In addition, when the driver depresses the brake pedal, the bra kes are applied firmly and
quickly to assist. (Brake Assist (SBS brake assist))
WA R N I N G
Do not rely completely on the SBS system and always drive carefully:
The SBS is designed to reduce damage in the ev ent of a collision, not avoid an accident. The
ability to detect an obstruction is limited de pending on the obstruction, weather conditions,
or traffic conditions. Therefore, if the accelerator pe
dal or brake pedal is mistakenly operated
it could result in an accident. Always verify th e safety of the surrounding area and depress the
brake pedal or accelerator pedal while keepin g a safer distance from vehicles ahead or
on-coming vehicles.
CAUTION
In the following cases, turn the system off to prevent a mis-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
off-road.
NOTE
•The SBS system operates when all of the following conditions are met:
•The ignition is switched ON.
•The SBS system is on.
•The vehicle speed is about 15 km/h or faster (10 mph or faster).
•The relative speed between your vehicle and the vehicle ahead is about 15 km/h or
faster (10 mph or faster).
•The Dynamic Stability Control (DSC) is not operating.
•The SBS system may not operate under the following conditions:
•If the vehicle is accelerated rapidly and it comes cl ose to a vehicle ahead.
When Driving
i-ACTIVSENSE
*Some models.4-127
CX-3_8GR7-EA-18B_Edition1 2017-12-20 16:18:14