sensor MAZDA MODEL 3 4-DOOR 2016 Service Manual

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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) Forward Obstruction Warning (FOW)
The radar sensor (front) functions by detecting the radio waves reflected 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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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 (fr ont) 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 guar d. If the front part of the vehicle has been damaged in a vehicle accident, the posi\
tion
of the radar sensor (front) may have moved. Stop the system immediately and
always have the vehicle inspected at an Authorized Mazda Dealer.
 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
Authorized Mazda Dealer. Do not modify the suspension. If the suspension ar e modified, 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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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 reflect 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 reflecting radio waves. Visibility is reduced due to a vehicle ahead casting off water, snow, or sand from its
tires and onto your windshield. The trunk/luggage compartment is loaded with heavy objects or the r ear 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 str ong 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 damag\
e.  Roads with repeated up and down slopes Driving on poor r oads or unpaved roads. The distance between your vehicle and the vehicle ahead is extr emely short. A vehicle suddenly comes close such as by cutting into the lane.
 To prevent incorrect operation of the system, use tires of the same specified size,
manufacturer, brand, and tread pattern on all four wheels. In addition, do not use tires
with significantly different wear patterns or tire pressures on the same vehicle. (Including
the temporary spare tire)
 If the battery power is weak, the system may not operate correctly. When driving on roads with little traffic 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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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:
 Never remove the sensor. A removed sensor will not meet the conditions for a class 1M laser under the IEC
60825-1 specification and therefore eye safety cannot be assured. Do not peer into the sensor using optical instruments with a magnification 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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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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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) shou\
ld 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.
NOTE
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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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 specified
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 flashes when the system has a malfunction.
Refer to Warning Lights on page 4-21.
ABS wheel speed sensor
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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). Airflow 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.
NOTE
Use the temperature control dial to
increase the air flow 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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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). Airflow
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.
NOTE
Use the temperature control dial to
increase the air flow 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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Maintenance and Care
Owner Maintenance
Wiper Blades
CAUTION
 Hot waxes applied by automatic car
washers have been known to affect the
wiper's ability to clean windows.
 To prevent damage to the wiper blades,
do not use gasoline, kerosene, paint
thinner, or other solvents on or near
them.
 When the wiper lever is in the AUTO
position and the ignition is switched ON,
the wipers may move automatically in
the following cases:
 If the windshield above the rain
sensor is touched. If the windshield above the rain
sensor is wiped with a cloth. If the windshield is struck with a hand
or other object. If the rain sensor is struck with a hand
or other object from inside the vehicle.
Be careful not to pinch hands or fingers
as it may cause injury, or damage the
wipers. When washing or servicing the
vehicle, make sure the wiper lever is in
the OFF position.
Contamination of either the windshield or
the blades with foreign matter can reduce
wiper effectiveness. Common sources are
insects, tree sap, and hot wax treatments
used by some commercial car washes.
If the blades are not wiping properly,
clean the window and blades with a good
cleaner or mild detergent; then rinse
thoroughly with clean water. Repeat if
necessary.
Replacing W indshield Wiper
Blades
When the wipers no longer clean well, the
blades are probably worn or cracked.
Replace them.
CAUTION
To prevent damage to the wiper arms
and other components, do not try to
sweep the wiper arm by hand.
NOTE
When raising both windshield wiper arms,
raise the driver's side wiper arm first.
When lowering the wiper arms, slowly
lower the wiper arm from the passenger's
side first while supporting it with your
hand. Forcefully lowering the wiper arms
could damage the wiper arm and blade,
and may scratch or crack the windshield.
1. Raise the wiper arm.
2. Open the clip and slide the blade
assembly in the direction of the arrow.
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