2015 MAZDA MODEL CX-3 brake sensor

4–142
When Driving
i-ACTIVSENSE
NOTE
  The Smart City Brake Support (SCBS) detects a vehicle ahead by emitting a near-
infrared laser beam and receiving the beam refl ected off the refl ector of the vehicle
ahead, and then using it for the measurement. Consequently, the Smart City Brake
Support (SCBS) may not operate under the following conditions:
 


 Refl ection of the laser is poor due to the shape of the vehicle ahead.



 The vehicle ahead is signifi cantly dirty.



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



 The window washer is being used or the windscreen wipers are not used when it's
raining.
 


 The windscreen is dirty.



 The steering wheel is turned completely left or right, or the vehicle is accelerated
rapidly and comes close to the vehicle ahead.
 


 Trucks with low loading platforms and vehicles with an extremely low or high
profi le.




 Vehicles with certain shapes such as a vehicle carrier. 

 Under the following conditions, the Smart City Brake Support (SCBS) system may not
operate normally.
 


 Heavy luggage is loaded in the luggage compartment or on the rear seat.



 If there is the possibility of partial contact with a vehicle ahead.



 When driving on continuously curving roads, and entering and exiting exits.



 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.
 


 When towing a malfunctioning vehicle.



 When driving with tyres having signifi cantly different wear. 

 In the following cases, the laser sensor (front) may inadvertently determine that there
is a vehicle ahead and the Smart City Brake Support (SCBS) system may operate.
 


 Objects on the road at the entrance to a curve.



 Vehicles passing in the opposite lane while making a curve.



 Metal objects, bumps, or protruding objects on the road.



 When passing through a toll gate equipped with a bar.



 When passing under a vinyl curtain or fl ag.



 Plastic objects such as pylons.



 Two-wheeled vehicles, pedestrians, animals or standing trees. 

(Manual transaxle) If the vehicle is stopped by the SCBS operation and the clutch pedal is not depressed,
the engine stops.
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*Some models.4–14 5
When Driving
i-ACTIVSENSE
Smart Brake Support (SBS) *
Smart Brake Support (SBS) is a system which alerts the driver of a possible collision using
an indicator and warning sound in the instrument cluster while the vehicle is being driven at
about 15 km/h or faster (10 mph or faster) and the system's radar sensor (front) determines
that your vehicle may hit a vehicle ahead. Furthermore, if the radar sensor (front) determines
that a collision is unavoidable, the automatic brake control is performed to reduce damage in
the event of a collision.
In addition, when the driver depresses the brake pedal, the brakes operate more quickly to
assist the driver (vehicles with brake fl uid pre-fi ll).
WARNING
Do not rely completely on the Smart Brake Support (SBS) system and always drive
carefully:
The Smart Brake Support (SBS) is designed to reduce damage in the event of
a collision, not avoid an accident. The ability to detect an obstruction is limited
depending on the obstruction, weather conditions, or traffi c conditions. Therefore,
if the accelerator pedal or brake pedal is mistakenly operated it could result in an
accident. Always verify the safety of the surrounding area and depress the brake pedal
or accelerator pedal while keeping a safer distance from vehicles ahead or on-coming
vehicles.
CAUTION
If the vehicle is towed or you are towing something, switch the Smart Brake Support
(SBS) system off to prevent a mistaken operation.
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4–14 6
When Driving
i-ACTIVSENSE
NOTE
  The Smart Brake Support (SBS) system operates when all of the following conditions
are met:
 


 The ignition is switched ON.



 The Smart Brake Support (SBS) system is on.



 The vehicle speed is about 15 km/h or faster (10 mph or faster).



 The relative speed between your vehicle and the vehicle ahead is about 15 km/h or
faster (10 mph or faster).
 


 The Dynamic Stability Control (DSC) is not operating. 

 The Smart Brake Support (SBS) system may not operate under the following
conditions:
 


 If the vehicle is accelerated rapidly and it comes close to a vehicle ahead.



 The vehicle is driven at the same speed as the vehicle ahead.



 The accelerator pedal is depressed.



 The brake pedal is depressed.



 The steering wheel is being operated.



 The selector lever is being operated.



 The direction indicator is being used.



 When the vehicle ahead is not equipped with tail lights or the tail lights are turned
off.
 


 When warnings and messages, such as a dirty windscreen, related to the Forward
Sensing Camera (FSC)/laser sensor (front) are being displayed in the centre display.
 
 Although the objects which activate the system are four-wheeled vehicles, the radar
sensor (front) could detect the following objects, determine them to be an obstruction,
and operate the Smart Brake Support (SBS) system.
 


 Objects on the road at the entrance to a curve (including guardrails and snow banks).



 A vehicle appears in the opposite lane while cornering or rounding a curve.



 When crossing a narrow bridge.



 When passing under a low gate or through a tunnel or narrow gate.



 When entering an underground parking area.



 Metal objects, bumps, or protruding objects on the road.



 If you suddenly come close to a vehicle ahead.



 When driving in areas where there is high grass or forage.



 Two-wheeled vehicles such as motorbikes or bicycles.



 Pedestrians or non-metallic objects such as standing trees. 

 When the system operates, the user is notifi ed by the fl ashing Smart Brake Support
(SBS) indicator light (red) and the active driving display.
  The Smart Brake Support (SBS) warning light (amber) turns on when the system has a
malfunction. Refer to Warning/Indicator Lights on page 4-36 .
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*Some models.4–151
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).
 


 Mazda Radar Cruise Control (MRCC)



 Distance Recognition Support System (DRSS)



 Smart Brake Support (SBS)
The radar sensor (front) functions by detecting the radio waves refl 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 C/D audio).
Refer to If a Warning Light Turns On or Flashes on page 7-35 .
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4–153
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 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 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.
NOTE
  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
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 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.4–154
When Driving
i-ACTIVSENSE
Laser Sensor (Front) *
Your vehicle is equipped with a laser sensor (front). The laser sensor (front) is positioned
near the rearview mirror and used by the following systems.
 


 Smart Brake Support (SBS)



 Smart City Brake Support (SCBS)
Laser sensor (front)
CAUTION
Heed the following precautions to assure correct operation of the system.


 Keep the windscreen clean at all times. 
 Do not apply stickers to the surface of the windscreen (including transparent stickers). 
 If cracks or damage caused by fl ying gravel or debris is visible near the laser sensor
(front), stop using the system immediately and have your vehicle inspected by an
Authorised Mazda Repairer.
 See the next page on how to turn off the system. Refer to Personalisation Features on
page 9-13 .
  Do not apply a coating agent to the windscreen. 
 When replacing the windscreen wipers or windscreen, consult an Authorised Mazda
Repairer.
  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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4–178
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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*Some models.7–47
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
Signal Warning Action to be taken
(Amber)
Smart Brake
Support/Smart
City Brake Support
(SBS/SCBS)
Warning Light
*
The light turns on if the windscreen or the
radar sensor are dirty, or there is a malfunction
in the system.
(Vehicles with type C/type D audio)
Verify the reason why the warning light
is illuminated on the centre display (page
7-35 ).
If the reason why the warning light is
illuminated is due to a dirty windscreen,
clean the windscreen.
If the warning light is illuminated because
of a dirty radar sensor, clean the front
emblem.
For any other reasons, have the vehicle
inspected at an expert repairer, we
recommend an Authorised Mazda Repairer.
(Vehicles without type C/type D audio)
If the reason why the warning light is
illuminated is due to a dirty windscreen,
clean the windscreen. For any other
reasons, have the vehicle inspected at
an expert repairer, we recommend an
Authorised Mazda Repairer.
KEY Warning Light
Take the appropriate action and verify that the warning light turns off.
Signal Cause Action to be taken
(Red)
(Flashing) The advanced key battery is dead. Replace the key battery (page 6-39 ).
The advanced key is not within the
operation range.
Bring the advanced key into the operation
range (page 3-7 ). The advanced key is placed in areas inside
the cabin where it is diffi cult for the key to
be detected.
A key from another manufacturer similar to
the advanced key is in the operation range. Take the key from another manufacturer
similar to the advanced key out of the
operation range.
Without the ignition switched off, the
advanced key is taken out of the cabin, and
then all the doors are closed. Bring the advanced key back into the
cabin.
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