sensor MAZDA CX90 2024 Workshop Manual

How to Use the Rear
Cross Traffic Alert (RCTA)
Operating the RCTA
The RCTA operates when all of the
following conditions are met.
The vehicle is about to be driven in
reverse.
The system detects an approaching
vehicle.
When the RCTA operates, the driver is
notified of the danger by flashing of
the BSM warning lights, a warning
indication, and a warning sound.
NOTE
The system may operate even if a
vehicle is not approaching
depending on the conditions around
your vehicle.
The RCTA may not operate normally
if any of the following conditions is
met.
The rear side radar sensors cannot
detect an object.
Refer to Radar Sensors on page
5-131.
The vehicle speed when reversing
is about 15 km/h (9 mph) or
faster.
A vehicle is approaching directly
from the rear of your vehicle.
A vehicle is approaching at an
angle from the rear of your vehicle.
If a Mazda genuine trailer hitch is
used, the RCTA is automatically
turned off when the trailer's
electrical connector is connected.
When pulling a trailer other than
with a Mazda genuine trailer hitch,
or while an accessory such as a
bicycle carrier is installed to the rear
of the vehicle, turn off the RCTA.
Otherwise, the radar’s radio waves
will be blocked causing the RCTA to
not operate normally.
The brightness of the BSM warning
lights is linked to the panel light
control.
Refer to Dashboard Illumination on
page 5-35.
Turning off the RCTA
There are 2 ways to turn off the RCTA.
Turn off the RCTA using Mazda
Connect.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
Turn off the RCTA using the
i-ACTIVSENSE OFF switch.
Refer to How to Use the
i-ACTIVSENSE OFF switch on page
5-126.
Driving
Rear Cross Tra ffi c Alert (RCTA)
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NOTE
The distance-between-vehicles can be set to 4 levels: Long, medium, short, and
extremely short distance.
The distance-between-vehicles differs depending on the vehicle speed, and the
slower the vehicle speed, the shorter the distance.
Close proximity warning
If your vehicle approaches a vehicle ahead while in headway control, a warning
sound and a display cautions you.
1. “Depress Brake Pedal”
NOTE
The close proximity warning may not be activated in the following cases.
The vehicle is driven at the same speed as the vehicle ahead.Directly after the MRCC is set.Immediately after the accelerator pedal is released.Another vehicle cuts into the driving lane.Do not use the MRCC under conditions in which the close proximity warnings are
frequently activated.
The MRCC is canceled temporarily
If any of the following conditions is met, the MRCC is canceled temporarily.
The brake pedal is depressed.The CANCEL switch is pressed one time.The DSC has operated.The Smart Brake Support (SBS) has operated.The front radar sensors cannot detect target objects.The parking brake is applied.Any door is opened.The driver’s seat belt is unfastened.The frequency of the braking operation by the MRCC is high.
If the MRCC is temporarily canceled, it will resume operation at the previously set
speed by pressing the RES switch.
Driving
Mazda Radar Cruise Control (MRCC)
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Active driving display
The CTS is temporarily canceled
Constant speed/Headway control function
If any of the following conditions is met, the constant speed/headway control
function is temporarily canceled.
The brake pedal is depressed.The CANCEL switch is pressed one time.The DSC has operated.The Smart Brake Support (SBS) has operated.The front radar sensors cannot detect target objects.The parking brake is applied.Any door is opened.The driver’s seat belt is unfastened.The frequency of the braking operation by the CTS is high.
If the constant speed/headway control function is temporarily canceled, it will
resume operation at the previously se t speed by pressing the RES switch.
Steering assist function
If any of the following conditions is met, the steering assist function is temporarily
canceled. The steering assist function is automatically restored when its operation
conditions are met.
The constant speed/headway control function is canceled.White (yellow) lane lines cannot be detected or a vehicle ahead cannot be
recognized.
The turn signal lever is operated.The steering wheel is operated abruptly.Hands are off the steering wheel.The vehicle is making a sharp curve.The vehicle crosses a lane line.The width of the vehicle lane is narrow or wide.
NOTE
The notification method when the steering assist function is canceled can be
changed.
Refer to the Settings section in the Mazda Connect Owner's Manual.
Driving
Cruising &
Tra ffi c Support (CTS)
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Warnings and Cautions
for Using the Emergency Lane Keeping (ELK)
WARNING
Do not rely completely on the ELK.
The ELK has limitations. Do not rely
completely on the system and always
stay on course using the steering
wheel.
 The ELK is not an automated driving
system. Over reliance on the system
could lead to an accident.
 The detection range of the camera
and sensors is limited. If the steering
wheel operation assist is operated
without detecting a two-wheeled
vehicle near the detecting vehicle, it
could result in an accident.
Do not use the ELK under the
following conditions. Otherwise, it
may result in an accident.
The vehicle is driven on slippery
roads such as icy roads,
snow-covered roads, and unpaved
roads.
 Tires other than the specified size are
used, such as when tire chains or
temporary spare tires are used.
 (Blind Spot Assist)
The vehicle is driven on roads other
than expressways and highways.
 (Blind Spot Assist and Head-on
traffic avoidance assist)
The rear bumper around a rear side
radar sensor is deformed.
Driving
Emergency Lane Keeping (ELK)
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Refer to Forward Sensing Camera
(FSC) on page 5-127.
The rear side radar sensors cannot
detect target objects correctly.
Refer to Radar Sensors on page
5-131.
The width of the vehicle lane is
narrow or wide.
The vehicle is driven on a section
with a closed lane or temporary
lane due to construction.
The vehicle is driven on a forked
road or junction.
If the driver operates the steering
wheel while the steering wheel
operation assist is operating , the
steering wheel operation assist is
canceled.
When the Blind Spot Assist is
temporarily canceled
The Blind Spot Assist goes on stand-by
when any of the following conditions is
met. The Blind Spot Assist is
automatically restored when its
operation conditions are met.
The accelerator pedal is depressed
abruptly.
The brake pedal is depressed.The steering wheel is operated
abruptly.
The TCS/DSC is operating.The TCS/DSC is turned off.Multiple vehicles are traveling in the
detecting area near your vehicle.
Head-on traffic avoidance assist
*
The Head-on traffic avoidance assist
operates
When all the following conditions are
met, the Head-on traffic avoidance
assist operates to assist the steering
wheel operation.
The vehicle speed is about 64 km/h
(40 mph) or faster.
The vehicle is driven on a straight
road or gentle curve.
The system detects white (yellow)
lane lines on both sides.
The CTS steering assist function is
not operating.
The system determines that your
vehicle may collide with a vehicle
approaching in the oncoming lane.
While the steering wheel operation
assist is operating , the screen display
notifies the driver.
Instrument cluster (i-ACTIVSENSE
display)
Instrument cluster (Other than
i-ACTIVSENSE display)
Driving
Emergency Lane Keeping (ELK)
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Active driving display

Furthermore, if the possibility of a road
departure increases, a screen display
and a warning sound notify the driver
of the danger. Operate the steering
wheel according to the screen display.
Instrument cluster
Active driving display
NOTE
The Head-on traffic avoidance assist
may not operate normally when any
of the following conditions is met.
The Forward Sensing Camera (FSC)
cannot detect target objects.
Refer to Forward Sensing Camera
(FSC) on page 5-127.
The front radar sensors cannot
detect target objects.
The width of the vehicle lane is
narrow or wide.
The vehicle is driven on a section
with a closed lane or temporary
lane due to construction.
The vehicle is driven on a forked
road or junction.
If the driver operates the steering
wheel while the steering wheel
operation assist is operating, the
steering wheel operation assist is
canceled.
When the Head-on traffic avoidance
assist is temporarily canceled
The Head-on traffic avoidance assist
goes on stand-by when any of the
following conditions is met. The
Head-on traffic avoidance assist is
automatically restored when its
operation conditions are met.
The accelerator pedal is depressed
abruptly.
The brake pedal is depressed.The steering wheel is operated
abruptly.
The TCS/DSC is operating.The TCS/DSC is turned off.Multiple vehicles are traveling in the
detecting area near your vehicle.
Turning off the ELK
There are 2 ways to turn off the ELK.
Turn off the ELK using Mazda
Connect.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
Turn off the ELK using the
i-ACTIVSENSE OFF switch.
Refer to How to Use the
i-ACTIVSENSE OFF switch on page
5-126.

When the ELK is turned off, the ELK
OFF indicator
turns on.
Driving
Emergency Lane Keeping (ELK)
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Smart Brake Support(SBS)
*
SBS is a system designed to avoid
collisions and reduce damage in the
event of a collision by controlling the
brakes. Sensors and camera equipped
on the vehicle detect objects, and
operate brake control if there is a
possibility of your vehicle colliding with
the object.
One part of the SBS functions when
you are driving forward and the other
part functions when you are driving in
reverse.
Forward drive detection
Forward drive detection has the
following 4 functions.
Forward detection function
*
The forward detection function is
designed to assist the driver in avoiding
collisions with objects (vehicles ahead,
pedestrians, bicycles, and motorcycles)
at the front and to reduce damage in
the event of a collision.
If there is a possibility of your vehicle
colliding with a target object at the
front, you are notified of possible
danger by a screen display and a
warning sound. Furthermore, if the
possibility of a collision increases,
brake control is performed to avoid
collision and reduce damage in the
event of a collision.
In addition, when the driver depresses
the brake pedal, the brakes are applied
firmly and quickly to assist.
Tu r n -A c ro s s Tra ffi c*
The Turn-Across Traffic is designed to
assist the driver in avoiding a collision
with a vehicle approaching in the
opposite direction when making a left
turn at an intersection and to reduce
damage in the event of a collision.
If there is a possibility of your vehicle
colliding with a vehicle approaching in
the opposite direction when you make
a left turn at an intersection, you are
notified of possible danger by a screen
display and a warning sound.
Furthermore, if the possibility of a
collision increases, brake control is
performed to avoid collision and
reduce damage in the event of a
collision.
Driving
Smart Brake Support (SBS)
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Rear Crossing*
The Rear Crossing is designed to avoid
collision and reduce damage in the
event of a collision with a vehicle
approaching from the rear sides.
If there is a possibility of your vehicle
colliding with a vehicle approaching
from the rear sides, you are notified of
possible danger by a screen display
and a warning sound. Furthermore, if
the possibility of a collision increases,
brake control is performed to avoid
collision and reduce damage in the
event of a collision.
Warnings and Cautions
for Using the Smart Brake Support (SBS)
WARNING
Do not rely completely on the SBS.
The SBS is only designed to reduce
damage in the event of a collision.
Over reliance on the system leading to
the accelerator pedal or brake pedal
being mistakenly operated could result
in an accident.
Heed the following cautions so that
the SBS can operate normally.
Do not modify the suspensions.
 Handle the Forward Sensing Camera
(FSC) appropriately. Otherwise, the
Forward Sensing Camera (FSC) may
not be able to detect target objects,
which could result in an accident.
Refer to Forward Sensing Camera
(FSC) on page 5-127.
 Handle the radar sensors
appropriately. Otherwise, the radar
sensors may not be able to detect
target objects, which could result in
an accident.
Refer to Radar Sensors on page
5-131.
 Handle the ultrasonic sensors
appropriately. Otherwise, the
ultrasonic sensors may not be able to
detect target objects, which could
result in an accident.
Refer to Ultrasonic Sensors on page
5-135.
 Handle the rear camera
appropriately. Otherwise, the rear
camera may not be able to detect
target objects, which could result in
an accident.
Driving
Smart Brake Support (SBS)
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1. “BRAKE!”

Active driving display
1. “BRAKE!”
NOTE
If any of the following conditions is
met, the forward detection function
may not operate normally.
The Forward Sensing Camera (FSC)
cannot detect target objects.
Refer to Forward Sensing Camera
(FSC) on page 5-127.
The front radar sensor cannot
detect target objects.
Refer to Radar Sensors on page
5-131.
When there is the possibility of a
partial contact with a target object.
The driver deliberately performs
driving operations (accelerator pedal
operation, steering wheel operation,
selector lever operation, and turn
signal lever operation).
If any of the follo wing conditions is
met, the forward detection function
may operate.
An animal or object on the road is
detected.
Passing an approaching vehicle
while rounding a curve.
Vehicle is passing through a narrow
gate or a gate with a low ceiling.
There is a metal object, bump, or a
protruding object on the road.
(Vehicles with Driver Monitoring
(DM))
If the system determines that the
driver is not paying attention to the
road, it activates the collision
warning earlier than normal.
If the forward detection function
performs brake control and the
vehicle is stopped, the system will
continue to hold the brakes for a
brief time unless there is an
operation performed by the driver.
The operation distance and volume
of the collision warning can be
changed.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
The Turn-Across Tra ffi c operation
conditions*
The Turn-Across
Tra ffi c operates when
all of the following conditions are met.
The vehicle speed is about 4 km/h
to 20 km/h (3 mph to 12 mph).
The left turn signal light is turned on
and the vehicle is turning left.
A lane line between your vehicle and
the vehicle approaching in the
opposite direction is detected.
The system determines that there is a
possibility of collision with an object
ahead.
When the Turn-Across Tra ffi c operates,
the driver is notified of the danger by
the screen display and warning sound.
Furthermore, if the possibility of a
collision increases, brake control is
performed.
Instrument cluster
Driving
Smart Brake Support (SBS)
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1. “BRAKE!”

Active driving display
1. “BRAKE!”
NOTE
If any of the following conditions is
met, the Turn-Across Traffic may not
operate normally.
The Forward Sensing Camera (FSC)
cannot detect target objects.
Refer to Forward Sensing Camera
(FSC) on page 5-127.
The front radar sensor cannot
detect target objects.
Refer to Radar Sensors on page
5-131.
The vehicle approaching in the
opposite direction is a
two-wheeled vehicle or a bicycle.
All of or only a part of a vehicle
approaching in the opposite
direction is hidden and it cannot
be recognized.
The speed of the on-coming
vehicle is too slow or too fast.
Turning at a large intersection with
two lanes or more on one side.
The accelerator pedal or brake
pedal is being operated.
The steering wheel is being
operated in the straight-ahead
position.
T h e Tu r n -A c ro s s Tra ffi c m ay n o t
operate depending on the country
where the vehicle is driven.
If any of the following conditions is
met, the Turn-Across Tra ffi c may
operate.
The steering wheel is turned
towards the on-coming traffic lane
with a vehicle approaching in the
opposite direction.
Turning right after or right before
an oncoming vehicle passes.
The direction of movement of a
vehicle approaching in the
opposite direction cannot be
predicted due to sudden right/left
turning or sudden deceleration.
The brakes are released by the brake
co n t ro l o f t h e Tu r n -A c ro s s Tra ffi c a s
soon as the danger of a collision
passes.
When Front Crossing is Operating
*
The Front Crossing operates when all
of the following conditions are met.
The vehicle is traveling straight at a
speed of about 5 km/h to 20 km/h
(3 mph to 12 mph).
The DSC/TCS is not operating.When an approaching vehicle is
traveling straight in a direction
perpendicular to your vehicle.
The approaching vehicle is traveling
at a constant speed within the range
of about 20 km/h to 60 km/h (12
mph to 37 mph).
The system determines that there is a
possibility of a collision with a
vehicle approaching from the front.
NOTE
Front Crossing may not operate
normally if any of the following
conditions is met.
If the front side radar sensors
cannot detect any target objects,
Front Crossing may not operate
correctly.
Refer to Radar Sensors on page
5-131.
Driving
Smart Brake Support (SBS)
5-202*Some models.
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