sensor MAZDA MODEL 3 HATCHBACK 2016 (in English) Service Manual

4–109
When Driving
i-ACTIVSENSE
*Some models.
 


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


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



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



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



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


y Exhaust gas from the vehicle in front, sand, snow, and water vapor rising from
manholes and grating, and water splashed into the air.
 


y When towing a malfunctioning vehicle. 



y 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.
 


y Objects on the road at the entrance to a curve.



y Vehicles passing in the opposite lane while making a curve.



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



y When passing through a toll gate.



y When passing under a vinyl curtain or À ag.



y Plastic objects such as pylons.



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



y Vehicle is driven with some of the tires having signi¿ cant wear. 



y When the system operates, the user is noti¿ ed by the À ashing Smart City Brake Support
(SCBS) indicator light (red) and the active driving display * . 


y The Smart City Brake Support (SCBS) warning light (amber) turns on when the system
has a malfunction.
  Refer to Warning Lights on page 4-21 .
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4–113
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).
 


y Mazda Radar Cruise Control (MRCC)



y Forward Obstruction Warning (FOW)
The radar sensor (front) functions by detecting the radio waves reÀ 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 Forward Obstruction Warning (FOW) warning light (amber) is illuminated, the area
around the radar sensor (front) may be dirty. Refer to “Warning Guidance” in the center
display (Type B audio).
Refer to If a Warning Light Turns On or Flashes on page 7-24 .
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4–114
When Driving
i-ACTIVSENSE
CAUTION
Heed the following precautions to assure correct operation of each system.  


¾ 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).
 


¾ 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.
 


¾ Do not install a grille guard.



¾ 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 Authorized Mazda Dealer.
 


¾ 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.
 


¾ Do not remove, disassemble, or modify the radar sensor (front).



¾ For repairs, replacement or paint work around the radar sensor (front), consult an
Authorized Mazda Dealer.
 


¾ 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.

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4–115
When Driving
i-ACTIVSENSE
N O T E
 


y In the following cases, the radar sensor (front) may not be able to detect vehicles ahead
or obstructions.
 


y 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.
 


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



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


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


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



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



y When driving near facilities or objects emitting strong radio waves. 



y 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.
 


y The beginning and end of a curve.



y Roads with continuous curves.



y Narrow lane roads due to road construction or lane closures.



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



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



y Roads with repeated up and down slopes



y Driving on poor roads or unpaved roads.



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



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



y To prevent incorrect operation of the system, use tires of the same speci¿ ed size,
manufacturer, brand, and tread pattern on all four wheels. In addition, do not use tires
with signi¿ cantly different wear patterns or tire pressures on the same vehicle. (Including
the temporary spare tire)
 


y If the battery power is weak, the system may not operate correctly.



y When driving on roads with little traf¿ c and few vehicles ahead or obstructions for the
radar sensor (front) to detect, Forward Obstruction Warning/Smart City Brake Support
(FOW/SCBS) warning light (amber) temporarily illuminates, however, this does not
indicate a problem.

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4–116
When Driving
i-ACTIVSENSE
Laser Sensor (Front)
The Smart City Brake Support (SCBS) laser sensor is installed at the top of the windshield
near the rearview mirror.


Laser sensor (front)

Always keep the surface of the windshield around the laser sensor 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:
 


¾ Never remove the sensor.



¾ 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.
 


¾ 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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4–117
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
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4–118
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.
Sedan


Radar sensors

Hatchback


Radar sensors

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 6-68 .
N O T E
Consult an Authorized Mazda Dealer for radar sensors (rear) repairs and replacement, or
repair, replacement or painting of the rear bumper near a radar sensors (rear).

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4–123
When Driving
Tire Pressure Monitoring System
*Some models.
Tire Pressure Monitoring System *
The Tire Pressure Monitoring System (TPMS) monitors the air pressure of all four tires. If
the air pressure of one or more tires is too low, the system warns the driver by indicating the
tire pressure monitoring system warning light in the instrument cluster and operating a beep
sound. The system monitors the tire 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
tire pressure (value on the tire pressure label). Follow the procedure and perform the
initialization.
Refer to Tire Pressure Monitoring System Initialization on page 4-126 .
The warning light À ashes when the system has a malfunction.
Refer to Warning Lights on page 4-21 .


ABS wheel speed sensor
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5–11
Interior Features
Climate Control System
Windshield Defrosting and
Defogging
Set the mode selector dial to the
position and turn the fan control dial to the
desired speed.
In this position, the outside air position
is automatically selected, and when the
fan control dial is ON, the air conditioner
automatically turns on. The air conditioner
will directly dehumidify the air to the
front windshield and side windows (page
5-4 ). AirÀ ow amount will be increased.
WARNING
Set the temperature control to the hot
or warm position when defogging (

position):
Using the
position with the
temperature control set to the cold
position is dangerous as it will cause
the outside of the windshield to fog up.
Your vision will be hampered, which
could lead to a serious accident.

N O T E
Use the temperature control dial to
increase the air À ow temperature and
defog the windshield more quickly.

Sunlight/Temperature Sensor
The climate control system measures
inside and outside temperatures, and
sunlight. It then sets temperatures inside
the passenger compartment accordingly.
CAUTION
Do not obstruct either sensor,
otherwise the climate control system
will not operate properly.



Sunlight sensor



Interior temperature sensor

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5–15
Interior Features
Climate Control System
Windshield Defrosting and
Defogging
Press the windshield defroster switch.
In this position, the outside air position
is automatically selected, and the air
conditioner automatically turns on. The
air conditioner will directly dehumidify
the air to the front windshield and side
windows (on Page 5-4 ). AirÀ ow
amount will be increased.
WARNING
Set the temperature control to the hot
or warm position when defogging (

position):
Using the
position with the
temperature control set to the cold
position is dangerous as it will cause
the outside of the windshield to fog up.
Your vision will be hampered, which
could lead to a serious accident.

N O T E
Use the temperature control dial to
increase the air À ow temperature and
defog the windshield more quickly.

Sunlight/Temperature Sensor
The climate control system measures
inside and outside temperatures, and
sunlight. It then sets temperatures inside
the passenger compartment accordingly.
CAUTION
Do not obstruct either sensor,
otherwise the climate control system
will not operate properly.



Sunlight sensor



Interior temperature sensor

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