Mazda 3 (2018 year). Instruction — part 17

Do not disassemble or modify the Forward Sensing Camera (FSC).

Disassembly or modification of the Forward Sensing Camera (FSC) will cause a malfunction
or mistaken operation. Consequently, each system may not operate normally which could
lead to an unexpected accident.

Heed the following cautions to assure the correct operation of the Forward Sensing Camera

(FSC).

Be careful not to scratch the Forward Sensing Camera (FSC) lens or allow it to get dirty.
Do not remove the Forward Sensing Camera (FSC) cover.
Do not place objects on the dashboard which reflect light.
Always keep the windshield glass around the camera clean by removing dirt or fogging.

Use the windshield defroster to remove fogging on the windshield.

Consult an Authorized Mazda Dealer regarding cleaning the interior side of the

windshield around the Forward Sensing Camera (FSC).

Consult an Authorized Mazda Dealer before performing repairs around the Forward

Sensing Camera (FSC).

The Forward Sensing Camera (FSC) is installed to the windshield. Consult an Authorized

Mazda Dealer for windshield repair and replacement.

When cleaning the windshield, do not allow glass cleaners or similar cleaning fluids to

get on the Forward Sensing Camera (FSC) lens. In addition, do not touch the Forward
Sensing Camera (FSC) lens.

When performing repairs around the rearview mirror, consult an Authorized Mazda

Dealer.

Consult an Authorized Mazda Dealer regarding cleaning of the camera lens.
Do not hit or apply strong force to the Forward Sensing Camera (FSC) or the area around

it. If the Forward Sensing Camera (FSC) is severely hit or if there are cracks or damage
caused by flying gravel or debris in the area around it, stop using the following systems
and consult an Authorized Mazda Dealer.

High Beam Control System (HBC)
Lane-keep Assist System (LAS) & Lane Departure Warning System (LDWS)
Traffic Sign Recognition System (TSR)
Smart City Brake Support (SCBS)
Smart Brake Support (SBS)

The direction in which the Forward Sensing Camera (FSC) is pointed has been finely

adjusted. Do not change the installation position of the Forward Sensing Camera (FSC) or
remove it. Otherwise, it could result in damage or malfunction.

Always use tires for all wheels that are of the specified size, and the same manufacturer,

brand, and tread pattern. In addition, do not use tires with significantly different wear
patterns on the same vehicle as the system may not operate normally.

When Driving

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The Forward Sensing Camera (FSC) includes a function for detecting a soiled windshield

and informing the driver, however, depending on the conditions, it may not detect plastic
shopping bags, ice or snow on the windshield. 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.

NOTE



In the following cases, the Forward Sensing Camera (FSC) cannot detect target objects
correctly, and each system may be unable to operate normally.



The height of the vehicle ahead is low.



You drive your vehicle at the same speed as the vehicle ahead.



Headlights are not turned on during the night or when going through a tunnel.



In the following cases, the Forward Sensing Camera (FSC) may not be able to detect
target objects correctly.



Under bad weather condition, such as rain, fog and snow.



The window washer is being used or the windshield wipers are not used when it's
raining.



Ice, fog, snow, frost, rainfall, dirt, or foreign matter such as a plastic bag is stuck on the
windshield.



Trucks with low loading platforms and vehicles with an extremely low or high profile.



When driving next to walls with no patterning (including fences and longitudinally
striped walls).



The taillights of the vehicle ahead are turned off.



A vehicle is outside the illumination range of the headlights.



The vehicle is making a sharp turn, or ascending or descending a steep slope.



Entering or exiting a tunnel.



Heavy luggage is loaded causing the vehicle to tilt.



Strong light is shone at the front of the vehicle (back light or high-beam light from
on-coming vehicles).



There are many light emitters on the vehicle ahead.



When the vehicle ahead is not equipped with taillights or the taillights are turned off at
nighttime.



Elongated luggage or cargo is loaded onto installed roof rails and covers the Forward
Sensing Camera (FSC).



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



When towing a malfunctioning vehicle.



The vehicle is driven with tires having significantly different wear.



The vehicle is driven on down slopes or bumpy roads.



There are water puddles on the road.

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

The surroundings are dark such as during the night, early evening, or early morning, or
in a tunnel or indoor parking lot.



The illumination brightness of the headlights is reduced or the headlight illumination is
weakened due to dirt or a deviated optical axis.



The target object enters the blind spot of the Forward Sensing Camera (FSC).



A person or object bursts onto the road from the shoulder or cuts right in front of you.



You change lanes and approach a vehicle ahead.



When driving extremely close to the target object.



Tire chains or a temporary spare tire is installed.



The vehicle ahead has a special shape. For example, a vehicle towing a trailer house or
a boat, or a vehicle carrier carrying a vehicle with its front pointed rearward.



If the Forward Sensing Camera (FSC) cannot operate normally due to backlight or fog,
the system functions related to the Forward Sensing Camera (FSC) are temporarily
stopped and the following warning lights turn on. However, this does not indicate a
malfunction.



High Beam Control System (HBC) warning light (amber)



Lane-keep Assist System (LAS) & Lane Departure Warning System (LDWS) warning
light



Smart Brake Support/Smart City Brake Support (SBS/SCBS) warning light (amber)



If the Forward Sensing Camera (FSC) cannot operate normally due to high temperatures,
the system functions related to the Forward Sensing Camera (FSC) are temporarily
stopped and the following warning lights turn on. However, this does not indicate a
malfunction. Cool down the area around the Forward Sensing Camera (FSC) such as by
turning on the air conditioner.



High Beam Control System (HBC) warning light (amber)



Lane-keep Assist System (LAS) & Lane Departure Warning System (LDWS) warning
light



Smart Brake Support/Smart City Brake Support (SBS/SCBS) warning light (amber)



If the Forward Sensing Camera (FSC) detects that the windshield is dirty or foggy, the
system functions related to the Forward Sensing Camera (FSC) are temporarily stopped
and the following warning lights turn on. However, this does not indicate a problem.
Remove the dirt from the windshield or press the defroster switch and defog the
windshield.



High Beam Control System (HBC) warning light (amber)



Lane-keep Assist System (LAS) & Lane Departure Warning System (LDWS) warning
light



Smart Brake Support/Smart City Brake Support (SBS/SCBS) warning light (amber)

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

If there are recognizable cracks or damage caused by flying gravel or debris on the
windshield, always have the windshield replaced. Consult an Authorized Mazda Dealer
for replacement.

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Radar Sensor (Front)

Your vehicle is equipped with a radar sensor (front).
The following systems also use the radar sensor (front).



Distance Recognition Support System (DRSS)



Mazda Radar Cruise Control (MRCC)



Smart Brake Support (SBS)

The radar sensor (front) functions by detecting the radio waves reflected off a vehicle ahead
or an obstruction sent from the radar sensor.
The radar sensor (front) is mounted behind the front emblem.

Radar sensor (front)

If the Smart Brake Support/Smart City Brake Support (SBS/SCBS) 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 7-25.

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 (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.

Do not install a grille guard.
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.

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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 are 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.

NOTE



Under the following conditions, the radar sensor (front) may not be able to detect vehicles
ahead or obstructions correctly and each system may not operate normally.



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 rear 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 strong radio waves.



Under the following conditions, the radar sensor (front) 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 damage.



Roads with repeated up and down slopes



Driving on poor roads or unpaved roads.



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

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

If the vehicle is driven on a road with little traffic and few vehicles ahead or obstructions
for the radar sensor (front) to detect, the sensor detects that the radar sensor (front) is
dirty and the Smart Brake Support/Smart City Brake Support (SBS/SCBS) Warning Light
(amber) may be temporarily turned on. However, it does not indicate a malfunction.

When Driving

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Radar Sensors (Rear)

Your vehicle is equipped with radar sensors (rear). The following systems also use the radar
sensors (rear).



Blind Spot Monitoring (BSM)



Rear Cross Traffic Alert (RCTA)

The radar sensors (rear) function by detecting the radio waves reflected off a vehicle
approaching from the rear or an obstruction sent from the radar sensor.

Sedan

Hatchback

Radar sensors (rear)

Radar sensors (rear)

The radar sensors (rear) are installed inside the rear bumper, one each on the left and right
sides.
Always keep the surface of the rear bumper near the radar sensors (rear) clean so that the
radar sensors (rear) operate normally. Also, do not apply items such as stickers.
Refer to Exterior Care on page 6-63.

CAUTION

If the rear bumper receives a severe impact, the system may no longer operate normally. Stop
the system immediately and have the vehicle inspected at an Authorized Mazda Dealer.

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NOTE



The detection ability of the radar sensors (rear) has limitations. In the following cases,
the detection ability may lower and the system may not operate normally.



The rear bumper near the radar sensors (rear) has become deformed.



Snow, ice or mud adheres to the radar sensors (rear) on the rear bumper.



Under bad weather conditions such as rain, snow and fog.



Under the following conditions, the radar sensors (rear) cannot detect target objects or it
may be difficult to detect them.



Stationary objects on a road or a road side such as small, two-wheeled vehicles,
bicycles, pedestrians, animals, and shopping carts.



Vehicle shapes which do not reflect radar waves well such as empty trailers with a low
vehicle height and sports cars.



Vehicles are shipped with the direction of the radar sensors (rear) adjusted for each
vehicle to a loaded vehicle condition so that the radar sensors (rear) detect approaching
vehicles correctly. If the direction of the radar sensors (rear) has deviated for some
reason, have the vehicle inspected at an Authorized Mazda Dealer.



For repairs or replacement of the radar sensors (rear), or bumper repairs, paintwork, and
replacement near the radar sensors, consult an Authorized Mazda Dealer.



Turn off the system while pulling a trailer or while an accessory such as a bicycle carrier
is installed to the rear of the vehicle. Otherwise, the radio waves emitted by the radar will
be blocked causing the system to not operate normally.



The radar sensors are regulated by the relevant radio wave laws of the country in which
the vehicle is driven. If the vehicle is driven abroad, authorization from the country in
which the vehicle is driven may be required.

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Cruise Control

*

With cruise control, you can set and automatically maintain any speed of more than about
25 km/h (16 mph).

WARNING

Do not use the cruise control under the following conditions:
Using the cruise control under the following conditions is dangerous and could result in loss of
vehicle control.

Hilly terrain
Steep inclines
Heavy or unsteady traffic
Slippery or winding roads
Similar restrictions that require inconsistent speed

▼ Cruise Control Switch

ON switch

RES/+ switch

SET- switch

OFF/CAN
switch

When Driving

Cruise Control

*Some models.

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NOTE
If your Mazda has the following steering switch, your Mazda is equipped with the Mazda
Radar Cruise Control (MRCC) system.
Refer to Mazda Radar Cruise Control (MRCC) on page 4-102.

CANCEL switch

RES switch

OFF switch

switch

switch

MODE switch

SET- switch

SET+ switch

▼ Cruise Main Indication (White),

Cruise Set Indication (white)/
Indicator Light (Green)

Cruise main indication (white)

The cruise main indication (white) is
displayed in the instrument cluster when
the cruise control system is activated.

Cruise set indication (white)/indicator
light (green)

The cruise set indication (white) is
displayed in the instrument cluster and the
cruise set indicator light (green) turns on
when a cruising speed has been set.

▼ Activation/Deactivation

To activate the system, press the ON
switch. The cruise main indication (white)
is displayed.
To deactivate the system, press the
OFF/CAN switch.
The cruise main indication (white) turns
off.

WARNING

Always turn off the cruise control system
when it is not in use:
Leaving the cruise control system in an
activation-ready state while the cruise
control is not in use is dangerous as the
cruise control could unexpectedly activate
if the activation button is accidentally
pressed, and result in loss of vehicle control
and an accident.

When Driving

Cruise Control

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NOTE
When the ignition is switched OFF, the
system status before it was turned off is
maintained. For example, if the ignition is
switched OFF with the cruise control
system operable, the system will be
operable when the ignition is switched ON
the next time.

▼ To Set Speed

1. Activate the cruise control system by

pressing the ON switch. The cruise
main indication (white) is displayed.

2. Accelerate to the desired speed, which

must be more than 25 km/h (16 mph).

3. Set the cruise control by pressing the

SET switch at the desired speed. The
cruise control is set at the moment the
SET switch is pressed. Release the
accelerator pedal simultaneously. The
cruise set indication (white) is
displayed and the cruise set indicator
light (green) turns on.

NOTE



The cruise control speed setting cannot
be performed under the following
conditions:



(Automatic transaxle)
The selector lever is in the P or N
position.



(Manual transaxle)
The shift lever is in the neutral
position.



The parking brake is applied.



Release the SET or RES/ switch at
the desired speed, otherwise the speed
will continue increasing while the RES/

switch is pressed and held, and

continue decreasing while the SET
switch is pressed and held (except when
the accelerator pedal is depressed).



On a steep grade, the vehicle may
momentarily slow down while
ascending, or speed up while
descending.



The cruise control will cancel if the
vehicle speed decreases below 21 km/h
(13 mph) when climbing a steep grade.



The cruise control may cancel at about
15 km/h (9 mph) below the preset speed
such as when climbing a long, steep
grade.

▼ To Increase Cruising Speed

Follow either of these procedures.

To increase speed using cruise control
switch

Press the RES/ switch and hold it. Your
vehicle will accelerate. Release the switch
at the desired speed.

Press the RES/ switch and release it
immediately to adjust the preset speed.
Multiple operations will increase the
preset speed according to the number of
times it is operated.

Increasing speed with a single RES/
switch operation

Instrument cluster display for vehicle
speed indicated in km/h: 1 km/h (0.6 mph)
Instrument cluster display for vehicle
speed indicated in mph: 1 mph (1.6 km/h)

When Driving

Cruise Control

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To increase speed using accelerator
pedal

Depress the accelerator pedal to accelerate
to the desired speed. Press the SET
switch and release it immediately.

NOTE
Accelerate if you want to speed up
temporarily when the cruise control is on.
Greater speed will not interfere with or
change the set speed. Take your foot off
the accelerator to return to the set speed.

▼ To Decrease Cruising Speed

Press the SET switch and hold it. The
vehicle will gradually slow.
Release the switch at the desired speed.

Press the SET switch and release it
immediately to adjust the preset speed.
Multiple operations will decrease the
preset speed according to the number of
times it is operated.

Decreasing speed with a single SET
switch operation

Instrument cluster display for vehicle
speed indicated in km/h: 1 km/h (0.6 mph)
Instrument cluster display for vehicle
speed indicated in mph: 1 mph (1.6 km/h)

▼ To Resume Cruising Speed at More

Than 25 km/h (16 mph)

If the cruise control system temporarily
canceled (such as applying the brake
pedal) and the system is still activated, the
most recent set speed will automatically
resume when the RES/ switch is pressed.
If vehicle speed is below 25 km/h (16
mph), increase the vehicle speed up to 25
km/h (16 mph) or more and press the RES/

switch.

▼ To Temporarily Cancel

To temporarily cancel the system, use one
of these methods:



Slightly depress the brake pedal.



(Manual transaxle)
Depress the clutch pedal.



Press the OFF/CAN switch.

If the RES/ switch is pressed when the
vehicle speed is 25 km/h (16 mph) or
higher, the system reverts to the previously
set speed.

NOTE



If any of the following conditions occur,
the cruise control system is temporarily
canceled.



The parking brake is applied.



(Automatic transaxle)
The selector lever is in the P or N
position.



(Manual transaxle)
The shift lever is in the neutral
position.



When the cruise control system is
temporarily canceled by even one of the
applicable cancel conditions, the speed
cannot be re-set.

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Cruise Control

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

(Automatic transaxle)
The cruise control cannot be cancelled
while driving in manual mode (selector
lever shifted from D to M position).
Therefore, engine braking will not be
applied even if the transaxle is shifted
down to a lower gear. If deceleration is
required, lower the set speed or depress
the brake pedal.

▼ To Deactivate

When a cruising speed has been set
(cruise set indication (white) is
displayed/cruise set indicator light
(green) turns on)

Long-press the OFF/CAN switch or press
the OFF/CAN switch 2 times.

When a cruising speed has not been set
(cruise main indication (white) is
displayed)

Press the OFF/CAN switch.

When Driving

Cruise Control

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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 4-148.
The warning light flashes when the system has a malfunction.
Refer to Warning Lights on page 4-24.

ABS wheel speed sensor

When Driving

Tire Pressure Monitoring System

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CAUTION

Each tire, including the spare (if provided), should be checked monthly when cold and

inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your vehicle has tires of a different size than the
size indicated on the vehicle placard or tire inflation pressure label, you should determine
the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when the low tire pressure telltale illuminates, you
should stop and check your tires as soon as possible, and inflate them to the proper
pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can
lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may
affect the vehicle's handling and stopping ability.
Please note that the TPMS is not a substitute for proper tire maintenance, and it is the
driver's responsibility to maintain correct tire pressure, even if under-inflation has not
reached the level to trigger illumination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when
the system is not operating properly.
The TPMS malfunction indicator is combined with the low tire pressure telltale. When the
system detects a malfunction, the telltale will flash for approximately one minute and then
remain continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When the malfunction indicator is illuminated,
the system may not be able to detect or signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of reasons, including the installation of replacement
or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly.
Always check the TPMS malfunction telltale after replacing one or more tires or wheels on
your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to
continue to function properly.

To avoid false readings, the system samples for a little while before indicating a problem. As

a result it will not instantaneously register a rapid tire deflation or blow out.

NOTE
Because this system detects slight changes in tire conditions, the timing of the warning may
be faster or slower in the following cases:



The size, manufacturer, or the type of tires is different from the specification.



The size, manufacturer, or the type of a tire is different from the others, or the level of tire
wear is excessively different between them.



A run-flat tire, studless tire, snow tire, or tire chains are used.

When Driving

Tire Pressure Monitoring System

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