2014 MAZDA MODEL 3 4-DOOR sensor

4–65
When Driving
Radar Sensor
Radar Sensor
Your vehicle is equipped with a radar sensor.
The following systems also use the radar sensor.
 y Mazda Radar Cruise Control (MRCC) y Forward Obstruction Warning (FOW)
The radar sensor functions by detecting the radio waves refl ected off a vehicle ahead or an
obstruction sent from the radar sensor.
The radar sensor is mounted behind the front emblem.
Radar Sensor
If the Forward Obstruction Warning (FOW) indicator light (amber) is illuminated, the area
around the radar sensor may be dirty. Refer to “Warning Guidance” in the type B audio
display.
Refer to If a Warning Light Turns On or Flashes on page 7-24 .
/C\FCA&('#*A'FKVKQPKPFD/C\FCA&('#*A'FKVKQPKPFD

4–66
When Driving
Radar Sensor
CAUTION
Heed the following precautions to assure correct operation of each system.


4–67
When Driving
Radar Sensor
NOTE
 y In the following cases, the radar sensor may not be able to detect vehic\
les ahead or
obstructions.
 y 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.
 y Vehicles ahead with low vehicle height and thus less area for refl 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 may detect vehicles in the oppo\
site 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 damag\
e.  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 specifi ed size,
manufacturer, brand, and tread pattern on all four wheels. In addition, do not use tires
with signifi 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 traffi c and few vehicles ahead or obstructions for the
radar sensor to detect, Forward Obstruction Warning/Smart City Brake Support (FOW/
SCBS) indicator light temporarily illuminates, however, this does not indicate a problem.
/C\FCA&('#*A'FKVKQPKPFD/C\FCA&('#*A'FKVKQPKPFD

*Some models.4–72
When Driving
Brake
Smart City Brake Support (SCBS) *
The Smart City Brake Support (SCBS) system is designed to reduce damag\
e in the
event of a collision by operating the brake control (SCBS brake) when \
the system's laser
sensor detects a vehicle ahead and determines that a collision with the \
vehicle ahead is
unavoidable. It may also be possible to avoid a collision if the relativ\
e speed between your
vehicle and the vehicle ahead is less than about 15 km/h (9.3 mph).
In addition, when the driver depresses the brake pedal while the system \
is in the operation
range at about 4 to 30 km/h (2 to 18 mph), the brakes are applied fi\
rmly and quickly to
assist. (Brake Assist (SCBS brake assist))
Laser sensor
WARNING
Do not rely on the Smart City Brake Support System (SCBS) as a substitute for safe
driving: The Smart City Brake Support (SCBS) system cannot compensate for unsafe and reckless
driving, excessive speed, tailgating (following another vehicle too closely), and driving on
slippery roads such as wet, snowy, and icy roads (reduced tire friction and road contact
because of water on the road surface). You can still have an accident.

/C\FCA&('#*A'FKVKQPKPFD/C\FCA&('#*A'FKVKQPKPFD

*Some models.4–75
When Driving
Brake
 y Under the following conditions, the Smart City Brake Support (SCBS) sy\
stem may not
operate normally.
 y Heavy luggage is loaded in the luggage compartment or on the rear seat. y When there is the possibility of partial contact with a vehicle or obstruction ah\
ead. y When driving on continuously curving roads, entering and exiting curves, and unstable
driving due to a vehicle accident or breakdown in a driving lane.
 y Elongated luggage or cargo is loaded onto installed roof rails and covers the laser
sensor.
 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 may inadvertently determine tha\
t there is a
vehicle ahead and the Smart City Brake Support (SCBS) system may opera\
te.
 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 fl ag. y Plastic objects such as pylons. y Two-wheeled vehicles, pedestrians, animals or standing trees.
 y If the vehicle is driven with some of the tires having signifi cant wear, the system may not
operate correctly. If the tires are returned to a normal state and the Smart City Brake
Support (SCBS) indicator light still illuminates, have your vehicle in\
spected by an
Authorized Mazda Dealer.
 y When the system operates, the user is notifi ed by the fl ashing warning light and the active
driving display * . y The indicator light turns on when the system has a malfunction. Refer to Warning Lights on page 4-22 .
/C\FCA&('#*A'FKVKQPKPFD/C\FCA&('#*A'FKVKQPKPFD

4–76
When Driving
Brake
Laser Sensor Handling
The Smart City Brake Support (SCBS) laser sensor is installed at the t\
op of the windshield
near the rearview mirror.
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:


4–77
When Driving
Brake
Laser sensor radiation data
Maximum average power: 45 mW
Pulse duration: 33 ns
Wavelength: 905 nm
Divergence angle (horizontal×vertical): 28 degrees×12 degrees
/C\FCA&('#*A'FKVKQPKPFD/C\FCA&('#*A'FKVKQPKPFD

4–91
When Driving
Mazda Radar Cruise Control (MRCC)
Mazda Radar Cruise Control (MRCC)
The Mazda Radar Cruise Control (MRCC) system is designed to maintain headway control *1
according to the vehicle speed using a radar sensor to detect the distan\
ce to a vehicle ahead,
and by presetting the vehicle speed between 30 km/h (19 mph) and 145 k\
m/h (90 mph) the
driver is freed from having to constantly use the accelerator or brake p\
edals.
*1 Headway Control: Control of the distance between your vehicle and the ve\
hicle ahead detected by the Mazda Radar Cruise Control (MRCC) system.
Additionally, if your vehicle starts closing in on the vehicle ahead because, for ex\
ample, the
vehicle ahead brakes suddenly, a warning sound and a warning indication in the display are
activated simultaneously to alert you to maintain a suffi cient distance between the vehicles.
Use the Mazda Radar Cruise Control (MRCC) system on expressways and ot\
her highways
which do not require a lot of repeated acceleration and deceleration.
WARNING
Do not rely completely on the Mazda Radar Cruise Control (MRCC) system and always
drive carefully: The Mazda Radar Cruise Control (MRCC) system is designed to reduce load on the
driver, and although it maintains a constant vehicle speed, or specifi cally, it maintains
a constant distance between your vehicle and the detected vehicle ahead according to
the vehicle speed, the system has detection limitations depending on the type of vehicle
ahead and its conditions, the weather conditions, and the road conditions. Additionally,
the system may be unable to decelerate suffi ciently to avoid hitting the vehicle ahead
if the vehicle ahead applies the brakes suddenly or another vehicle cuts into the driving
lane, which could result in an accident. Always verify the safety of the surrounding area
and depress the brake pedal or accelerator pedal while keeping a safe distance from
vehicles ahead or on-coming vehicles.

/C\FCA&('#*A'FKVKQPKPFD/C\FCA&('#*A'FKVKQPKPFD