sensor MAZDA CX90 2024 Service Manual

Warnings and Cautionsfor Using the FuelRequirements
CAUTION
 USE ONLY UNLEADED FUEL.
Leaded fuel is harmful to the catalytic
converter and oxygen sensors and
will lead to deterioration of the
emission control system and or
failures.
 This vehicle can only use oxygenated
fuels containing no more than 10 %
ethanol by volume. Damage to the
vehicle may occur when ethanol
exceeds this recommendation, or if
the gasoline contains any methanol.
Stop using gasohol of any kind if your
vehicle engine is performing poorly.
 Never add fuel system additives
other than a Mazda genuine
product, otherwise the emission
control system could be damaged.
Consult an Authorized Mazda Dealer
for details.
Emission Control System
This vehicle is equipped with an
emission control system (the catalytic
converter is part of this system) that
enables the vehicle to comply with
existing exhaust emissions
requirements.
NOTE
Under U.S. federal law, any
modification to the
original-equipment emission control
system before the first sale and
registration of a vehicle is subject to
penalties. In some states, such modification made on a used vehicle
is also subject to penalties.
While the engine is off, the sound of
a valve opening and closing can be
heard at the rear of the vehicle,
however this does not indicate an
abnormality. The vehicle has a
self-checking device and it operates
while the engine is off.
Driving
Refueling
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Radar Sensors*
The radar sensor detects objects by
sending radio waves in a specific
direction and receiving the reflected
waves back.
Ve h i c l e f ro n t
1. Front radar sensor*
2. Front side radar sensors*

Ve h i c l e rea r
1. Rear side radar sensors*
CAUTION
 Heed the following cautions so that
the radar sensors can function
normally.
 Do not modify the suspensions.
 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 with significantly different
wear patterns or tire pressures on
the same vehicle (including
temporary spare tire).
Do not spray highly pressurized
water against the radar sensors or
rub them strongly.
 Do not apply stickers on parts near
the radar sensors.
 If foreign matter adheres to parts
near the radar sensors, remove it
and switch the vehicle power OFF.
The foreign matter detection status
is reset by switching the vehicle
power OFF.
 Consult an Authorized Mazda
Dealer if you need to repair,
replace, or paint parts near the
radar sensors.
 Do not install any parts that cover
the front of the radar sensors.
 Do not replace the radiator grille
and emblem with anything other
than genuine products.
 If strong force is applied to parts near
the radar sensors, the direction of
the radar sensor may become
deviated and each system may not
operate normally. Stop each system
immediately and have the vehicle
inspected by an Authorized Mazda
Dealer.
NOTE
The radar sensors include a function
for detecting abnormalities in the
sensor, soiling of the sensor’s front
surface, and informing the driver. If a
message appears on the screen that
can be addressed, follow the
directions of the message.
Front radar sensor
The following systems utilize the front
radar sensor.
Distance & Speed Alert (DSA)Mazda Radar Cruise Control
(MRCC)
Cruising & Traffic Support (CTS)
Driving
Radar Sensors
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Smart Brake Support (SBS) forward
drive detection
NOTE
When driving on roads with few
vehicles ahead, a message may
temporarily be displayed on the
screen indicating that the front radar
sensor is dirty.
When the vehicle is driven on roads
in which there is an elevated road on
one side, the front radar sensor
function may be restricted
temporarily.
If the lead-acid battery power is
weak, the front radar sensor
detection function may decrease and
each system may not operate
normally.
When any of the following
conditions is met, the front radar
sensor may not be able to detect
vehicles ahead or obstructions
correctly.
During inclement weather.Front visibility is reduced.The vehicle is driven near facilities
or objects emitting strong radio
waves.
The rear surface of a vehicle ahead
does not reflect radio waveseffectively.
A vehicle ahead has limited areas
that can reflect radio waves.
Your vehicle is tilted.Foreign matter is adhering to parts
near the front radar sensor.
When any of the following
conditions is met, the front radar
sensor may detect vehicles in the
adjacent lane or surrounding
obstructions, or it may not be able to
detect vehicles ahead or
obstructions.
The vehicle is entering or exiting a
curve.
The vehicle is driven on a
continuously curving road.
The vehicle is driven on roads with
repeated up and downslopes.
The vehicle is driven on roads with
narrow lanes.
The vehicle is driven on poor roads
or unpaved roads.
The vehicle ahead enters the front
radar sensor’s blind spot.
The distance to the vehicle ahead
is extremely close.
The vehicle ahead is being driven
in an unstable condition.
A vehicle suddenly comes close
such as by cutting into your lane.
Front side radar sensors
The following system utilizes front side
radar sensors.
Front Cross Traffic Alert (FCTA)Smart Brake Support (SBS) Front
Crossing
NOTE
When any of the following
conditions is met, the front side
radar sensors may not be able to
detect target objects.
During inclement weather.The vehicle is driven on a sharp
curve or on bumpy roads.
Radar sensor from an adjacent
vehicle causes radio wave
interference.
The detection range of a front side
radar sensor is obstructed by an
adjacent wall or vehicle, or the
radar is reflected.
A vehicle suddenly enters the
detection range from the front or
side of your vehicle.
Driving
Radar Sensors
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The target object is extremely
small.
The target object is extremely low/
high.
A vehicle approaches while
turning.
A vehicle that has stopped
suddenly starts to move.
Multiple objects move at the same
time.
The bumper around a front side
radar sensor is deformed.
Foreign matter is adhering to the
bumper around a front side radar
sensor.
The temperature near a front side
radar sensor is extremely hot.
The front side radar sensors may not
detect the following target objects.
Animals.Pedestrians.Bicycles and small motorcycles
moving at a low speed.
Shopping carts.Stationary objects on the road or
roadside.
Vehicles with shapes that may not
reflect radar waves.
Rear side radar sensors
The following systems utilize rear side
radar sensors.
Blind Spot Monitoring (BSM)Blind Spot Monitoring (BSM) Vehicle
Exit Warning
Rear Cross Traffic Alert (RCTA)Smart Brake Support (SBS) Rear
Crossing
Emergency Lane Keeping (ELK) Blind
Spot Assist
NOTE
When any of the following
conditions is met, the rear side radar
sensors may not be able to detect
target objects.
During inclement weather.The vehicle is driven on a sharp
curve or on bumpy roads.
Radar sensor from an adjacent
vehicle causes radio wave
interference.
The detection range of a front side
radar sensor is obstructed by an
adjacent wall or vehicle, or the
radar is reflected.
A vehicle suddenly enters the
detection range from the front or
side of your vehicle.
The target object is extremely
small.
The target object is extremely low/
high.
A vehicle approaches while
turning.
A vehicle that has stopped
suddenly starts to move.
Multiple objects move at the same
time.
The bumper around a rear side
radar sensor is deformed.
Foreign matter is adhering to the
bumper around a rear side radar
sensor.
The temperature near a rear side
radar sensor is extremely hot.
When towing a trailer.The rear side radar sensors may not
detect the following target objects.
Animals.Pe de st r ia ns .Bicycles and small motorcycles
moving at a low speed.
Shopping carts.Stationary objects on the road or
roadside.
Driving
Radar Sensors
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Vehicles with shapes that may notreflect radar waves.
A vehicle is trav eling alongside
your vehicle at nearly the same
speed for an extended period of
time.
Driving
Radar Sensors
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Ultrasonic Sensors*
The ultrasonic sensors detect objects
by sending ultrasonic waves in a
specific direction and receiving the
reflected waves back.
Front ultrasonic sensors
*
Rear ultrasonic sensors
Detection ranges of ultrasonic sensors
1. About 50 cm (20 in)
2. About 1 m 50 cm (59 in)
3. About 1 m (39.3 in)
CAUTION
 Heed the following cautions so that
the ultrasonic sensors can function
normally.
 Do not modify the suspensions.
 Do not spray highly pressurized
water against the ultrasonic sensors
or rub them strongly.
 Do not apply stickers on the
ultrasonic sensors.
 Consult an Authorized Mazda
Dealer if you need to repair,
replace, or paint the bumper.
 Depending on the type of target
object and surrounding conditions,
the distance at which the ultrasonic
sensors can detect target objects may
be shortened or the target objects
may not be detected. Always confirm
the safety around the vehicle visually
when driving.
 If strong force is applied to parts near
the ultrasonic sensors, the direction
of the ultrasonic sensor may become
deviated and each system may not
operate normally. Stop each system
immediately and have the vehicle
inspected by an Authorized Mazda
Dealer.
NOTE
The ultrasonic sensors include a
function for detecting abnormalities
in the sensor, soiling of the sensor’s
front surface, and informing the
driver. If a message appears on the
screen that can be addressed, follow
the directions of the message.
When any of the following
conditions is met, the ultrasonic
sensors may not be able to detect
target objects, and each system may
not operate normally.
Driving
Ultrasonic Sensors
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Target object is thin such as wire,
rope, or poles.
Target object absorbs waves easily
such as cotton or snow.
Target object has an angular shape.Target object is tall and wide at the
upper part.
Target object height is low.There are multiple target objects.Target objects are too close to the
sensors.
Ice, snow, or mud is adhering to
the sensor area.
Heavy rainfall or pressurized water
is applied to the sensor area.
The sensor areas are frozen.You cover the sensor with your
hand.
The area around the sensor has
received a strong impact.
The vehicle is excessively tilted.Under extremely hot or cold
weather.
Approached by an object that
generates ultrasonic waves, such as
the horn of another vehicle, the
engine noise of a motorcycle, the
air brake noise of a large vehicle,
or the sensor of another vehicle.
A commercially-available fender
pole or an antenna for a radio
transmitter is installed to the
vehicle.
The vehicle is moving towards a tall
or square curbstone, or a steep
grade.
The vehicle is moving towards an
uneven wall or stairs.
The vehicle is driven in a place with
low ceilings.
The vehicle is driven on bumpy
roads, inclines, gravel roads, dense
grass, or grating.
The ultrasonic sensor does not detect
target objects directly beneath the
bumper. Even if target objects which
are located at a position lower than
an ultrasonic sensor have been
detected, the ultrasonic sensor may
suddenly stop detecting as the
vehicle approaches the target object.
Front ultrasonic sensors
The following systems utilize front
ultrasonic sensors.
Pa r k i n g S e n s o r
Rear ultrasonic sensors
The following systems utilize rear
ultrasonic sensors.
Smart Brake Support (SBS) reverse
drive detection
Pa r k i n g S e n s o r
Driving
Ultrasonic Sensors
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Active driving display
NOTE
The BSM 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 road is on a steep slope.The road is extremely wide.You make a lane change 2 lanes or
more.
The BSM may operate when turning
at intersections in urban areas or
with stationary objects on the road
or the roadside (such as guardrails,
sidewalls, and parked vehicles).
If a Mazda genuine trailer hitch is
used, the BSM 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 BSM.
Otherwise, the radar’s radio waves
will be blocked causing the BSM 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.
When the Vehicle Exit Warning
operates*
The Vehicle Exit Warning operates
when all of the following conditions
are met.
The vehicle is stopped.Within 3 minutes after the vehicle
power is switched OFF or the vehicle
power is switched ON.
The system detects an approaching
vehicle.
When the Vehicle Exit Warning
operates, the driver is notified of the
presence of an approaching vehicle
using the warning lights and the
instrument cluster screen display
(white)
*1.
BSM warning light
Instrument cluster
*1 The instrument cluster screen display (white)
is displayed only when the instrument
cluster is set to the i-ACTIVSENSE display.
However, when the vehicle power is OFF,
Driving
Blind Spot Monitoring (BSM)
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the instrument cluster screen display (white)
is not displayed.

In addition, when the door in the
direction in which an approaching
vehicle is detected is opened, the
driver is notified of the danger by
flashing of the warning lights, the
warning sound, and the instrument
cluster warning indication (amber).
BSM warning light
Instrument cluster
NOTE
The Vehicle Exit Warning 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.
There is a parked vehicle near your
vehicle.
Moving objects are slow.The Vehicle Exit Warning is not
automatically turned off even if a
Mazda genuine trailer hitch is used.
If a trailer is towed or a bicycle
carrier is attached to the rear of the
vehicle, the radar signal may be
blocked and the Vehicle Exit Warning
may not operate correctly.
The Vehicle Exit Warning may
operate with stationary objects on
the road or the roadside (such as
guardrails, sidewalls, and parked
vehicles).
The brightness of the BSM warning
lights is linked to the panel light
control.
Refer to Dashboard Illumination on
page 5-35.
Tu r n i n g off the BSM and the Vehicle
Exit Warning
There are 2 ways to turn off the BSM
and the Vehicle Exit Warning.
Tu r n
off the BSM and the Vehicle Exit
Warning using Mazda Connect.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
Tu r n off the BSM and the Vehicle Exit
Warning using the i-ACTIVSENSE
OFF switch.
Refer to How to Use the
i-ACTIVSENSE OFF switch on page
5-126.
Driving
Blind Spot Monitoring (BSM)
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The front side radar sensors may not
detect objects and the front crosstraffic alert (FCTA) may not operate
normally.
Refer to Radar Sensors on page
5-131.
Tu r n i n g off the FCTA
There are 2 ways to turn off the FCTA.
Tu r n
off the FCTA using Mazda
Connect.
Refer to the Settings section in the
Mazda Connect Owner's Manual.
Tu r n off the FCTA using the
i-ACTIVSENSE OFF switch.
Refer to How to Use the
i-ACTIVSENSE OFF switch on page
5-126.
Driving
Front Cross Tra ffi c Alert (FCTA)
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