sensor MAZDA CX9 2023 Service Manual

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 2 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 light 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 wh
ile 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.
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, authorization from the
country where the vehicle is driven might be required.
The system switches to the Rear Cross Traffic Alert function when the selector lever is
shifted to the reverse (R) position.
Refer to Rear Cross Traffic Alert (RCTA) on page 4-141.
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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.
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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
multi-information display is indicated to advise you to keep a safe distance 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 limited depending on th e 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 po sition 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)
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The RCTA warning indication in the 360° view monitor also synchronizes with the
Blind Spot Monitoring (BSM) warni ng indicator light on the door mirrors.
Mazda Connect
(Type A)Mazda Connect
(Type B)
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 ch
ecking for vehicles at the rear when putting the
vehicle in reverse. Due to certain limitations wi th 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 vehicle. 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.
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The temperature near the radar sensors 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.
The vehicle speed when reversing is about 10 km/h (6.3 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 at an angle.
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.
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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 Cruise 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 4-98)
Forward Sensing Camera (FSC) (page 4-239)
Radar sensor (front) (page 4-244)
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 tr affic is heavy and there is insufficient space
between vehicles.
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When traveling on a downslope for a
long period of time.
There is a problem with the system.
The engine has stalled.
Any of the doors is opened.
The driver's seat belt is unfastened.
The parking brake 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 Stop & Go function
system is canceled, you can resume
control at the previ ously 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/CANCEL switch 2 times
while the MRCC with Stop & Go function
system is operating to switch off the
system.
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Smart City Brake Support [Reverse] (SCBS R)*
The SCBS R is a system which is designed to reduce damage in the event of a collision by
operating the brake control (SCBS brake) when the system’s ultr asonic sensors detect an
obstruction at the rear of the vehicle while driving at a speed of about 2 to 8 km/h (2 to 4
mph) and the system determines that a collision is unavoidable.
Reverse Ultrasonic sensor (rear)
WA R N I N G
Do not rely completely on the SCBS R system:

The SCBS R system is only designed to reduce damage in the event of a collision. Over
reliance on the system leading to the accel erator pedal or brake pedal being mistakenly
operated could result in an accident.
 To assure the correct operation of the SCBS R, heed the following cautions.
 Do not apply a sticker to an ultrasonic sens or (rear) (including transparent stickers).
Otherwise, the ultrasonic sensor (rear) may no t be able to detect vehicles or obstructions
which could result in an accident.
 Do not disassemble an ultrasonic sensor (rear).
 If cracks or damage caused by flying gravel or debris is visible around an ultrasonic
sensor (rear), stop using the SCBS R system immediately and have your vehicle inspected
by an Authorized Mazda Dealer. If the vehi cle continues to be driven with cracks or
scratch marks left around an ultrasonic sensor, the system may operate unnecessarily
and cause an unexpected accident.
Refer to Stopping the Smart City Brake Supp ort [Reverse] (SCBS R) System Operation on
page 4-181.
 Consult an Authorized Mazda Dealer for rear bumper replacement.
Do not modify the suspension:
If the vehicle height or inclination is change d, the SCBS R system may not operate correctly
because it cannot detect obstructions correctly.
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Do not apply a strong force to an ultrasonic sensor (rear):
When washing the vehicle, do not spray highly pressurized water against an ultrasonic sensor
(rear), or rub it strongly. In addition, do no t hit the rear bumper forcefully when loading and
unloading cargo Otherwise, the sensors may no t detect obstructions correctly which could
cause the SCBS R system to not operate normally, or it could operate unnecessarily.
CAUTION
 When driving off-road in areas where there is gr ass or foliage, it is recommended that the
SCBS R system be turned off.
 Always use tires of the specified size and the same manufacturer, brand, and tread pattern
on all 4 wheels. In addition, do not use tires wi th significantly different wear patterns on the
same vehicle. Otherwise, the SCBS R system may not operate normally.
 If ice or snow is stuck on the ultrasonic sensors (rear) they may not be able to detect
obstructions correctly depending on the condit ions. In such cases, the system may not be
able to perform controls correctly. Always dr ive carefully and pay attention to the rear of
the vehicle.
NOTE
The vehicle posture changes depending on the accelerator pedal, brake pedal and
steering wheel operations, which could make it difficult for the system to recognize an
obstruction, or it could facilitate unnecessary detection. In such cases, the SCBS R may or
may not operate.
The SCBS R system will operate under the following conditions.
The engine is running.
The selector lever is in the R (reverse) position.
“Reverse Smart City Brake Support Malfunction” is not displayed in the
multi-information display.
The vehicle speed is between about 2 to 8 km/h (2 to 4 mph).
The SCBS R is not turned off.
The DSC is not malfunctioning.
The SCBS R operates using ultrasonic sensors (rear) which detect obstructions at the rear
by emitting ultrasonic waves and then receiving the returning waves reflected off the
obstructions.
In the following cases, the ultrasonic sensors (rear) cannot detect obstructions and the
SCBS R may not operate.
The height of the obstruction is low such as low walls or trucks with low loading
platforms.
The height of the obstruction is high such as trucks with high loading platforms.
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The obstruction is small.
The obstruction is thin such as a signpost.
The obstruction is positioned away from the center of the vehicle.
The surface of the obstruction is not pointed vertically relative to the vehicle.
The obstruction is soft such as a hanging curtain or snow stuck to a vehicle.
The obstruction is shaped irregularly.
The obstruction is extremely close.
In the following cases, the ultrasonic sensors (rear) cannot detect obstructions correctly
and the SCBS R may not operate.
Something is stuck on the bumper near an ultrasonic sensor (rear).
The steering wheel is turned sharply, or the brake or accelerator pedal is operated.
There is another obstruction near one obstruction.
During inclement weather such as rain, fog and snow.
High or low humidity.
High or low temperatures
Strong winds.
The path of travel is not flat.
Heavy luggage is loaded in the luggage compartment or on the rear seat.
Objects such as a wireless antenna, fog light, or illuminated license plate is installed
near an ultrasonic sensor (rear).
The orientation of an ultrasonic sensor (r ear) has deviated for reasons such as a
collision.
The vehicle is affected by other sound wave s such as the horn, engine noise, ultrasonic
sensor of another vehicle.
In the following cases, an ultrasonic sensor (rear) may detect something as a target
obstruction which could cause the SCBS R system to operate.
Driving on a steep slope.
Wheel blocks.
Hanging curtains, gate poles such as at toll gates and railroad crossing.
When traveling near objects such as foliage, barriers, vehicles, walls, and fences along
a road.
When driving off-road in areas where there is grass and forage.
When passing through low gates, narrow gates, car washing machines, and tunnels.
A towing bar is installed or a trailer is connected.
During the SCBS R brake control, the brake pedal may move rearward or become stiff.
The brakes are operating, but continue to depress the brake pedal.
When the system operates, the user is notified by the multi-information display.
The Smart City Brake Support (SCBS) warning indication (amber) turns on when the
system has a malfunction.
Refer to Taking Action on page 7-37.
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