sensor MAZDA MODEL CX-3 2015 (in English) Service Manual

4–155
When Driving
i-ACTIVSENSE
Laser sensor radiation data
Maximum average power:45 mW
Pulse duration:33 ns
Wavelength:905 nm
Divergence angle (horizontal×vertical):28 degrees×12 degrees
NOTE
  In the following cases, the laser sensor (front) cannot detect vehicles ahead correctly,
and each system may be unable to operate normally.
 


 The windscreen is dirty.



 Elongated luggage or cargo is loaded onto installed roof rails and covers the laser
sensor (front).
 


 Exhaust gas from the vehicle in front, sand, snow, and water vapour rising from
manholes and grating, and water splashed into the air.
 
 If there are recognizable cracks or damage caused by fl ying gravel or debris on the
windscreen, always have the windscreen replaced. Consult an Authorised Mazda
Repairer for replacement.
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*Some models.4–156
When Driving
i-ACTIVSENSE
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 Traffi c Alert (RCTA)
The radar sensors (rear) function by detecting the radio waves refl 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.

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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 Authorised Mazda
Dealer.
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4–157
When Driving
i-ACTIVSENSE
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 diffi 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 refl 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 Authorised Mazda Dealer.
  For repairs or replacement of the radar sensors (rear), or bumper repairs, paintwork,
and replacement near the radar sensors, consult an Authorised Mazda Dealer.
  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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*Some models.4–163
When Driving
Tyre Pressure Monitoring System
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 specifi 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 4-166 .
The warning light fl ashes when the system has a malfunction.
Refer to Warning Lights on page 4-37 .
ABS wheel speed sensor
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*Some models.4–17 7
When Driving
Parking Sensor System
Parking Sensor System *
The parking sensor system uses ultrasonic sensors to detect obstructions around the vehicle
while parking the vehicle in a garage or during parallel parking when the shift lever is
in reverse (R). The system is equipped with an assist device to notify the driver of the
approximate distance from the vehicle to the surrounding obstruction using a beep sound.
Rear corner sensorRear sensor
WARNING
Do not rely completely on the parking sensor system and be sure to confi rm the safety
around your vehicle visually when driving.
This system can assist the driver in operating the vehicle in the forward and 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
confi rm the safety around your vehicle visually when driving.
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4–178
When Driving
Parking Sensor System
NOTE
  Do not install any accessories within the detection ranges of the sensors. It may affect
the system operation.
  Depending on the type of obstruction and the surrounding conditions, the detection
range of a sensor may narrow, or the sensors may not be able to detect obstructions.
  The system may not operate normally under the following conditions:




 Mud, ice, or snow is adhering to the sensor area (Returns to normal operation when
removed).
 


 The sensor area is frozen (Returns to normal operation when the ice is thawed).



 The sensor is covered by a hand.



 The sensor is excessively shocked.



 The vehicle is excessively tilted.



 Under extremely hot or cold weather conditions.



 The vehicle is driven on bumps, inclines, gravel, or grass covered roads.



 Anything which generates ultrasound is near the vehicle, such as another vehicle's
horn, the engine sound of a motorcycle, the air brake sound of a large-sized vehicle,
or another vehicle's sensors.
 


 The vehicle is driven in heavy rain or in road conditions causing water-splash.



 A commercially-available wing pole or an aerial for a radio transmitter is installed to
the vehicle.
 


 The vehicle is moving towards a tall or square curbstone.



 An obstruction is too close to the sensor. 

 Obstructions under the bumper may not be detected. Obstructions that are lower than
the bumper or thin which may have been initially detected but are no longer detected
as the vehicle approaches more closely.
  The following types of obstructions may not be detected:




 Thin objects such as wire or rope



 Things which absorb sonic waves easily such as cotton or snow



 Angular shaped objects



 Very tall objects, and those which are wide at the top



 Small, short objects 

 Always have the system inspected at an expert repairer, we recommend an Authorised
Mazda Repairer if any shock is applied to the bumpers, even in a minor accident. If the
sensors are deviated, they cannot detect obstructions.
  The system may have a malfunction if the beep does not operate. Consult an expert
repairer, we recommend an Authorised Mazda Repairer.
  The beeper which indicates a system malfunction may not be heard if the ambient
temperature is extremely cold, or mud, ice, or snow adheres to the sensor area.
Remove any foreign material from the sensor area.
  When installing a trailer hitch, consult an expert repairer, we recommend an
Authorised Mazda Repairer.
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4–179
When Driving
Parking Sensor System
Sensor Detection Range
The sensors detect obstructions within the following range.
Rear sensor detection range Rear corner sensor detection rangeB AA: About 50 cm (About 19 in)
B: About 150 cm (About 59.0 in)
Park Assist Sensor System Operation
When the ignition is switched ON and the shift lever is shifted to the reverse (R), the beep
sound activates and the system is enabled for use.
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4–18 0
When Driving
Parking Sensor System
Parking Sensor Warning Beep
The beeper sounds as follows while the system is operating.
Rear Sensor
Distance detection area Distance between vehicle and obstruction Beeper sound *1
Farthest distance Approx. 150 cm—60 cm (59.0—23.0 in) Slow intermittent sound
Far distance Approx. 60—45 cm (23—17 in)
Medium intermittent sound
Middle distance Approx. 45—35 cm (17—13 in)
Fast intermittent sound
Close distance Within approx. 35 cm (13 in)
Continuous sound
*1 The rate at which the intermittent sound beeps increases as the vehicle approaches the obstruction.
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4–181
When Driving
Parking Sensor System
Rear Corner Sensor
Distance detection area Distance between vehicle and obstruction Beeper sound *1
Far distance Approx. 50—38 cm (19—14 in) Medium intermittent sound
Middle distance Approx. 38—25 cm (14.0—9.8 in)
Fast intermittent sound
Close distance Within approx. 25 cm (9.8 in)
Continuous sound
*1 The rate at which the intermittent sound beeps increases as the vehicle approaches the obstruction.
NOTE
If an obstruction is detected in a zone for 6 seconds or more, the beep sound is stopped
(except for the close-distance zone). If the same obstruction is detected in another zone,
the corresponding beep sound is heard.
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4–182
When Driving
Parking Sensor System
When Warning Beep is Activated
The system notifi es the driver of an abnormality by activating the beep sound.
Beep How to check
The beep sound is not heard. The system may have a malfunction. Have the vehicle inspected at an expert
repairer, we recommend an Authorised Mazda Repairer as soon as possible.
When the engine switch is
turned ON or if the parking
sensor detects a problem while
driving, the intermittent sound
of the buzzer is heard 1—4
times.
*1
Remove any foreign material from the sensor area. If the system does not
recover, have the vehicle inspected at an expert repairer, we recommend an
Authorised Mazda Repairer.
*1 The number of times the buzzer activates changes depending on the malfunction
location.
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