2017 MAZDA MODEL CX-3 sensor

4–186
When Driving
i-ACTIVSENSE
*Some models.
Radar Sensor (Front) *
Your vehicle is equipped with a radar sensor (front).
The following systems also use the radar sensor (front).
 


 Mazda Radar Cruise Control (MRCC)



 Distance Recognition Support System (DRSS)



 Smart Brake Support (SBS)
The radar sensor (front) functions by detecting the radio waves reÀ ected off a vehicle ahead
or an obstruction sent from the radar sensor.
The radar sensor (front) is mounted behind the front emblem.

Radar sensor (front)

If the Smart Brake Support/Smart City Brake Support (SBS/SCBS) Warning Light (amber)
is illuminated, the area around the radar sensor may be dirty. Refer to “Warning Guidance”
in the centre display (Type B audio).
Refer to If a Warning Light Turns On or Flashes on page 7-49 .

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When Driving
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CAUTION
Heed the following precautions to assure correct operation of each system.  
 Do not adhere stickers (including transparent stickers) to the surface of the radiator
grille and front emblem in and around the radar sensor (front), and do not replace
the radiator grille and front emblem with any product that is not a genuine product
designed for use with the radar sensor (front).
  The radar sensor (front) includes a function for detecting soiling of the radar sensor's
front surface and informing the driver, however, depending on the conditions, it may
require time to detect or it may not detect plastic shopping bags, ice or snow. If this
occurs, the system may not operate correctly, therefore always keep the radar sensor
(front) clean.
  Do not install a grille guard. 
 If the front part of the vehicle has been damaged in a vehicle accident, the position of
the radar sensor (front) may have moved. Stop the system immediately and always
have the vehicle inspected at an Authorised Mazda Repairer.
  Do not use the front bumper to push other vehicles or obstructions such as when
pulling out of a parking space. Otherwise, the radar sensor (front) could be hit and its
position deviated.
  Do not remove, disassemble, or modify the radar sensor (front). 
 For repairs, replacement or paint work around the radar sensor (front), consult an
Authorised Mazda Repairer.
  Do not modify the suspension. If the suspension are modi¿ ed, the vehicle's posture
could change and the radar sensor (front) may not be able to correctly detect a vehicle
ahead or an obstruction.

4–18 8
When Driving
i-ACTIVSENSE
NOTE
  Under the following conditions, the radar sensor (front) may not be able to detect
vehicles ahead or obstructions correctly and each system may not operate normally.
 


 The rear surface of a vehicle ahead does not reÀ ect radio waves effectively, such as
an unloaded trailer or an automobile with a loading platform covered by a soft top,
vehicles with a hard plastic tailgate, and round-shaped vehicles.
 


 Vehicles ahead with low vehicle height and thus less area for reÀ ecting radio waves.



 Visibility is reduced due to a vehicle ahead casting off water, snow, or sand from its
tyres and onto your windscreen.
 


 The luggage compartment is loaded with heavy objects or the rear passenger seats
are occupied.
 


 Ice, snow, or soiling is on the front surface of the front emblem.



 During inclement weather such as rain, snow, or sand storms.



 When driving near facilities or objects emitting strong radio waves. 

 Under the following conditions, the radar sensor (front) may not be able to detect
vehicles ahead or obstructions.
 


 The beginning and end of a curve.



 Roads with continuous curves.



 Narrow lane roads due to road construction or lane closures.



 The vehicle ahead enters the radar sensor's blind spot.



 The vehicle ahead is running abnormally due to accident or vehicle damage.



 Roads with repeated up and down slopes



 Driving on poor roads or unpaved roads.



 The distance between your vehicle and the vehicle ahead is extremely short.



 A vehicle suddenly comes close such as by cutting into the lane. 

 To prevent incorrect operation of the system, use tyres of the same speci¿ ed size,
manufacturer, brand, and tread pattern on all four wheels. In addition, do not use
tyres with signi¿ cantly different wear patterns or tyre pressures on the same vehicle
(Including the temporary spare tyre).
  If the battery power is weak, the system may not operate correctly. 
 If the vehicle is driven on a road with little traf¿ c and few vehicles ahead or
obstructions for the radar sensor (front) to detect, the sensor detects that the radar
sensor (front) is dirty and the Smart Brake Support/Smart City Brake Support (SBS/
SCBS) Warning Light (amber) may be temporarily turned on. However, it does not
indicate a malfunction.

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When Driving
i-ACTIVSENSE
*Some models.
Radar Sensors (Rear) *
Your vehicle is equipped with radar sensors (rear). The following systems also use the radar
sensors (rear).
 


 Blind Spot Monitoring system (BSM)



 Rear Cross Traf¿ c Alert (RCTA)
The radar sensors (rear) function by detecting the radio waves reÀ ected off a vehicle
approaching from the rear or an obstruction sent from the radar sensor.

Radar sensors (rear)

The radar sensors (rear) are installed inside the rear bumper, one each on the left and right
sides.
Always keep the surface of the rear bumper near the radar sensors (rear) clean so that the
radar sensors (rear) operate normally. Also, do not apply items such as stickers.
Refer to Exterior Care on page 6-58 .
CAUTION
If the rear bumper receives a severe impact, the system may no longer operate normally.
Stop the system immediately and have the vehicle inspected at an expert repairer, we
recommend an Authorised Mazda Repairer.

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When Driving
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NOTE
  The detection ability of the radar sensors (rear) has limitations. In the following cases,
the detection ability may lower and the system may not operate normally.
 


 The rear bumper near the radar sensors (rear) has become deformed.



 Snow, ice or mud adheres to the radar sensors (rear) on the rear bumper.



 Under bad weather conditions such as rain, snow and fog. 

 Under the following conditions, the radar sensors (rear) cannot detect target objects or
it may be dif¿ cult to detect them.




 Stationary objects on a road or a road side such as small, two-wheeled vehicles,
bicycles, pedestrians, animals, and shopping carts.
 


 Vehicle shapes which do not reÀ ect radar waves well such as empty trailers with a
low vehicle height and sports cars.


 Vehicles are shipped with the direction of the radar sensors (rear) adjusted for each
vehicle to a loaded vehicle condition so that the radar sensors (rear) detect approaching
vehicles correctly. If the direction of the radar sensors (rear) has deviated for some
reason, have the vehicle inspected at an expert repairer, we recommend an Authorised
Mazda Repairer.
  For repairs or replacement of the radar sensors (rear), or bumper repairs, paintwork,
and replacement near the radar sensors, consult an expert repairer, we recommend an
Authorised Mazda Repairer.
  Turn off the system while pulling a trailer or while an accessory such as a bicycle
carrier is installed to the rear of the vehicle. Otherwise, the radio waves emitted by the
radar will be blocked causing the system to not operate normally.
  The radar sensors are regulated by the relevant radio wave laws of the country in
which the vehicle is driven. If the vehicle is driven abroad, authorization from the
country in which the vehicle is driven may be required.

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When Driving
i-ACTIVSENSE
*Some models.
Ultrasonic Sensor (Rear) *
The ultrasonic sensors (rear) function by emitting ultrasonic waves which are reÀ ected off
obstructions at the rear and the returning ultrasonic waves are picked up by the ultrasonic
sensors (rear).

Ultrasonic sensor (rear)
The ultrasonic sensors (rear) are mounted in the rear bumper.

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When Driving
Tyre Pressure Monitoring System
*Some models.
Tyre Pressure Monitoring System *
The Tyre Pressure Monitoring System (TPMS) monitors the air pressure of all four tyres. If
the air pressure of one or more tyres is too low, the system warns the driver by indicating the
tyre pressure monitoring system warning light in the instrument cluster and operating a beep
sound. The system monitors the tyre pressures indirectly using the data sent from the ABS
wheel speed sensors.
To allow the system to operate correctly, the system needs to be initialized with the speci¿ ed
tyre pressure (value on the tyre pressure label). Follow the procedure and perform the
initialization.
Refer to Tyre Pressure Monitoring System Initialization on page 4-201 .
The warning light À ashes when the system has a malfunction.
Refer to Warning Lights on page 4-36 .


ABS wheel speed sensor

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When Driving
Parking Sensor System
*Some models.
Parking Sensor System *
The parking sensors use ultrasonic sensors which detect obstructions around the vehicle
when the vehicle is driven at low speeds, such as during garage or parallel parking, and a
buzzer sound and detection indicator notify the driver of the approximate distance from the
vehicle to the surrounding obstruction.


Rear corner sensorRear sensor
WARNING
Do not rely completely on the parking sensor system and be sure to con¿ rm the safety
around your vehicle visually when driving:
This system can assist the driver in operating the vehicle in the backward directions
while parking. The detection ranges of the sensors are limited, therefore, driving the
vehicle while relying only on the system may cause an accident. Always con¿ rm the
safety around your vehicle visually when driving.