2014-2018 Mazda 3 4 Door When Driving -> Radar Sensor User Manual
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When Driving -> Radar Sensor for Your Mazda 3 4 Door Third Generation (2014-2018)

When Driving  
Radar Sensor  
Radar Sensor  
Your vehicle is equipped with a radar sensor.  
The following systems also use the radar sensor.  
yꢀ  
Mazda Radar Cruise Control (MRCC)  
yꢀ  
Forward Obstruction Warning (FOW)  
The radar sensor functions by detecting the radio waves reflected 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) warning light (amber) is illuminated, the area  
around the radar sensor 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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When Driving  
Radar Sensor  
CAUTION  
Heed the following precautions to assure correct operation of each system.  
¾ꢀ  
Do not adhere stickers (including transparent stickers) to the surface of the radiator  
grille and front emblem in and around the radar sensor, 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.  
¾ꢀ  
The radar sensor 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  
clean.  
¾ꢀ  
Do not install a grille guard.  
¾ꢀ  
If the front part of the vehicle has been damaged in a vehicle accident, the position of  
the radar sensor may have moved. Stop the system immediately and always have the  
vehicle inspected at an Authorized Mazda Dealer.  
¾ꢀ  
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 could be hit and its  
position deviated.  
¾ꢀ  
Do not remove, disassemble, or modify the radar sensor.  
¾ꢀ  
For repairs, replacement or paint work around the radar sensor, consult an  
Authorized Mazda Dealer.  
¾ꢀ  
Do not modify the suspension. If the suspension are modiꢀed, the vehicle's posture  
could change and the radar sensor may not be able to correctly detect a vehicle  
ahead or an obstruction.  
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When Driving  
Radar Sensor  
NOTE  
yIn the following cases, the radar sensor may not be able to detect vehicles ahead or  
obstructions.  
yThe 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.  
yVehicles ahead with low vehicle height and thus less area for reflecting radio waves.  
yVisibility is reduced due to a vehicle ahead casting off water, snow, or sand from its  
tires and onto your windshield.  
yThe trunk/luggage compartment is loaded with heavy objects or the rear passenger  
seats are occupied.  
yIce, snow, or soiling is on the front surface of the front emblem.  
yDuring inclement weather such as rain, snow, or sand storms.  
yWhen driving near facilities or objects emitting strong radio waves.  
yIn the following cases, the radar sensor may detect vehicles in the opposite lane or  
surrounding obstructions, or it may not be able to detect vehicles ahead or obstructions.  
yThe beginning and end of a curve.  
yRoads with continuous curves.  
yNarrow lane roads due to road construction or lane closures.  
yThe vehicle ahead enters the radar sensor's blind spot.  
yThe vehicle ahead is running abnormally due to accident or vehicle damage.  
yRoads with repeated up and down slopes  
yDriving on poor roads or unpaved roads.  
yThe distance between your vehicle and the vehicle ahead is extremely short.  
yA vehicle suddenly comes close such as by cutting into the lane.  
yTo 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)  
yIf the battery power is weak, the system may not operate correctly.  
yWhen driving on roads with little traffic and few vehicles ahead or obstructions for the  
radar sensor 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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