sensor MAZDA MODEL 3 HATCHBACK 2015 (in English) Service Manual

*Some models.4–150
When Driving
i-ACTIVSENSE
Radar Sensor (Front) *
Your vehicle is equipped with a radar sensor (front).
The following systems also use the radar sensor (front).
 


 Smart Brake Support (SBS)



 Mazda Radar Cruise Control (MRCC)



 Distance Recognition Support System (DRSS)
The radar sensor (front) functions by detecting the radio waves refl ected off a vehicle ahead
or an obstruction sent from the radar sensor (front).
The radar sensor (front) is mounted behind the front emblem.
Radar sensor (front)
If the Smart Brake Support (SBS) warning light (amber) is illuminated, the area around the
radar sensor (front) 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 7-32 .
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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 modifi 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.
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4–152
When Driving
i-ACTIVSENSE
NOTE
  In the following cases, the radar sensor (front) may not be able to detect vehicles ahead
or obstructions.
 


 The rear surface of a vehicle ahead does not refl 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 refl 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 boot/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. 

 In the following cases, the radar sensor (front) may detect vehicles in the opposite
lane or surrounding obstructions, or it 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 specifi ed size,
manufacturer, brand, and tread pattern on all four wheels. In addition, do not use
tyres with signifi 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. 
 When driving on roads with little traffi c and few vehicles ahead or obstructions for the
radar sensor (front) to detect, Smart Brake Support/Smart City Brake Support (SBS/
SCBS) warning light (amber) temporarily illuminates, however, this does not indicate
a problem.
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*Some models.4–153
When Driving
i-ACTIVSENSE
Laser Sensor (Front) *
The Smart City Brake Support (SCBS) laser sensor (front) is installed at the top of the
windscreen near the rearview mirror.
Laser sensor (front)
Always keep the surface of the windscreen around the laser sensor (front) clean to assure
proper operation of the Smart City Brake Support (SCBS) system.
WARNING
As there is the possibility of eye damage occurring from the laser, always heed the
following precautions:
 
 Never remove the sensor. 
 A removed sensor will not meet the conditions for a class 1M laser under the IEC
60825-1 specifi cation and therefore eye safety cannot be assured.

 Do not peer into the sensor using optical instruments with a magnifi cation function
such as magnifying glasses, and microscopic and objective lenses within a distance
of 100 mm (3.94 in) from the sensor.
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4–154
When Driving
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Laser sensor radiation data
Maximum average power: 45 mW
Pulse duration: 33 ns
Wavelength: 905 nm
Divergence angle (horizontal×vertical): 28 degrees×12 degrees
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*Some models.4–155
When Driving
i-ACTIVSENSE
Radar Sensors (Rear) *
The radar sensors (rear) for the rear vehicle monitoring system are equipped inside the rear
bumper, one each on the left and right sides.
Saloon
Radar sensors (rear)
Hatchback
Radar sensors (rear)
The surface area of the rear bumper near the radar sensors (rear) should always be clean so
that the rear vehicle monitoring system operates correctly. Do not apply stickers or similar
objects to the rear bumper.
Refer to Exterior Care on page 6-71 .
NOTE
Consult an Authorised Mazda Dealer for radar sensors (rear) repairs and replacement, or
repair, replacement or painting of the rear bumper near the radar sensors (rear).
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*Some models.4–161
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 4-164 .
The warning light fl ashes when the system has a malfunction.
Refer to Warning Lights on page 4-41 .
ABS wheel speed sensor
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4–16 8
When Driving
Rear View Monitor
Displayable Range on the Screen
The images on the screen may be different from the actual conditions.
(Screen display)
Boot lid (saloon)/
garnish (hatchback) Obstruction detection
indication in parking
sensor system.
Bumper
Object
Some models (Actual view)
NOTE
  The displayable range varies depending on the vehicle and road conditions. 
 The displayable range is limited. Objects under the bumper or around the bumper ends
cannot be displayed.
  The distance appearing in the displayed image is different from the actual distance
because the rear view parking camera is equipped with a specifi c lens.

 Some optionally installed vehicle accessories may be picked up by the camera. Do not
install any optional parts that can interfere with the camera view, such as illuminating
parts or parts made of refl ective material.

 It may be diffi cult to see the display under the following conditions, however, it does
not indicate a malfunction.
 


 In darkened areas.



 When the temperature around the lens is high/low.



 When the camera is wet such as on a rainy day or during periods of high humidity.



 When foreign material such as mud is stuck around the camera.



 When the camera lens refl ects sunlight or headlight beams. 

 Image display may be delayed if the temperature around the camera is low.
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*Some models.4–175
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 vehicle is driven
at a speed of about 10 km/h (6 mph) or less. 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 and obstruction detection indication
* .
Front sensor Rear sensorRear sensor
Front Rear
Saloon Hatchback
Front corner sensor Rear corner sensor Rear corner 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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4–176
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.
 (With front sensor and front corner sensor) The system may have a malfunction if the beep does not operate or the indicator light
does not illuminate when the park assist sensors switch is turned on. Consult an expert
repairer, we recommend an Authorised Mazda Repairer.
 (Without front sensor and front corner sensor) The system may have a malfunction if the beep does not operate. Consult an expert
repairer, we recommend an Authorised Mazda Repairer.
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