2015 MAZDA MODEL 3 HATCHBACK brake

4–141
When Driving
i-ACTIVSENSE
WARNING
Turn off the Smart City Brake Support (SCBS) when the vehicle is running on a chassis
roller or being towed:
Turn off the Smart City Brake Support (SCBS) system to prevent mistaken operation
when the vehicle is running on a chassis roller or being towed. See the next page on
how to turn off the Smart City Brake Support (SCBS).
Refer to Stopping The Smart City Brake Support (SCBS) System Operation on page
4-144 .
CAUTION
  When driving off-road in areas where there is grass or forage, it is recommended that
the Smart City Brake Support (SCBS) system be turned off.
  Always use tyres for all wheels that are of the specifi ed size, and the same
manufacturer, brand, and tread pattern. In addition, do not use tyres with signifi cantly
different wear patterns on the same vehicle as the Smart City Brake Support (SCBS)
system may not operate normally.
  The laser sensor (front) includes a function for detecting a soiled windscreen and
informing the driver, however, depending on the conditions, it may not detect plastic
shopping bags, ice or snow on the windscreen. In such cases, the system cannot
accurately determine a vehicle ahead and may not be able to operate normally. Always
drive carefully and pay attention to the road ahead.
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4–142
When Driving
i-ACTIVSENSE
NOTE
  The Smart City Brake Support (SCBS) system will not operate if the driver is
deliberately performing driving operations (accelerator pedal and steering wheel).
  The Smart City Brake Support (SCBS) system will operate under the following
conditions.
 


 The engine is running.



 The Smart City Brake Support (SCBS) warning light (amber) does not illuminate.



 The vehicle speed is between about 4 to 30 km/h (2 to 18 mph).



 The Smart City Brake Support (SCBS) system is not turned off.



 The DSC operation is not turned off using the DSC OFF switch.



 The DSC is not malfunctioning. 

 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.
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*Some models.4–14 3
When Driving
i-ACTIVSENSE
NOTE
  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.



 When passing under a vinyl curtain or fl ag.



 Plastic objects such as pylons.



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



 Vehicle is driven with some of the tyres having signifi cant wear. 

 When the system operates, the user is notifi ed by the fl ashing Smart City Brake
Support (SCBS) indicator light (red) and the active driving display * .   The Smart City Brake Support (SCBS) warning light (amber) turns on when the
system has a malfunction.
 Refer to Warning Lights on page 4-41 .
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4–14 4
When Driving
i-ACTIVSENSE
Smart City Brake Support (SCBS)
Indicator Light (Red)
If the Smart City Brake Support (SCBS) is
operating, the indicator light (red) fl ashes.
Stopping the Smart City Brake
Support (SCBS) System Operation
The Smart City Brake Support (SCBS)
system can be temporarily deactivated.
When the Smart City Brake Support
(SCBS) system is turned off, the Smart
City Brake Support (SCBS) OFF indicator
light turns on.
When the engine is restarted, the system
becomes operational.
NOTE
When the DSC OFF switch is pressed to
stop the DSC operation, the Smart City
Brake Support (SCBS) system operation
also stops and the Smart City Brake
Support (SCBS) OFF indicator light
turns on.
Without SCBS OFF switch
Refer to Personalisation Features on page
9-16 .
NOTE
If the Smart City Brake Support (SCBS)
system operation is turned off, the Smart
Brake Support (SBS) system operation
is turned off simultaneously.
With SCBS OFF switch
Press the SCBS OFF switch to turn
off the system. The Smart City Brake
Support (SCBS) OFF indicator light in the
instrument cluster will illuminate.
Press the switch again to turn the system
back on. The Smart City Brake Support
(SCBS) OFF indicator light will turn off.
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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 determines that
your vehicle may hit a vehicle ahead. Furthermore, if the radar sensor 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:
Smart Brake Support (SBS) is only designed to reduce damage in the event of a
collision. 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 miss-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 DSC OFF indicator light is not illuminated.



 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 there is the possibility of hitting only a part of a vehicle ahead.



 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. 

 Although the objects which activate the system are 4-wheeled vehicles, the radar
sensor 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 Lights on page 4-41 .
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4–147
When Driving
i-ACTIVSENSE
Smart Brake Support (SBS)
Indicator Light (Red)
If the Smart Brake Support (SBS) is
operating, the indicator light (red) fl ashes.
Collision Warning
If there is the possibility of a collision
with a vehicle ahead, the beep sounds
continuously and a warning is indicated in
the display.
Stopping The Smart Brake
Support (SBS) System Operation
The Smart Brake Support (SBS) system
can be temporarily deactivated.
Refer to Personalisation Features on page
9-16 .
When the Smart Brake Support (SBS)
system is turned off, the Smart Brake
Support (SBS) OFF indicator light turns
on.
When the engine is restarted, the system
becomes operational.
NOTE
If the Smart Brake Support (SBS)
system operation is turned off, the Smart
City Brake Support (SCBS) system
operation is turned off simultaneously.
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*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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