Page 257 of 624

The SCBS is a system which operates in response to a vehicle ahead. The system may not be
able to detect or react to 2- wheeled vehicles or pedestrians.
CAUTION
In the following cases, turn the system
off to prevent a mis-operation:
The vehicle is being towed or when towing another vehicle.
The vehicle is on a chassis roller.
When driving on rough roads such as in areas of dense grass or off-road.
Refer to Stopping the Smart City Brake Suppor t (SCBS) system Operation on page 4-127 on
how to turn off the SCBS system.
NOTE
The SCBS system will operate under the following conditions.
The engine is running.
The Smart Brake Support/Smart City Brake Support (SBS/SCBS) system warning light
(amber) does not illuminate.
(Rear-end collision warning)
The vehicle speed is about 4 to 80 km/h (2 to 50 mph).
(Brake control (Smart City Brake Support (SCBS) brake))
The vehicle speed is about 4 to 30 km/h (2 to 18 mph).
The SCBS system is not turned off.
Under the following conditions, the SCBS system may not operate normally:
The SCBS system will not operate if the dr iver is deliberately performing driving
operations (accelerator pedal and steering wheel).
If there is the possibility of partial contact with a vehicle ahead.
The vehicle is driven on a slippery road surface such as wet roads or icy or snow-bound
roads.
The braking performance is adversely affected due to cold temperatures or wet brakes.
The vehicle is driven at the same speed as the vehicle ahead.
The accelerator pedal is depressed.
The brake pedal is depressed.
The steering wheel is being operated.
The selector lever is being operated.
When Driving
i-ACTIVSENSE
4-125
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21
Page 258 of 624

In the following cases, the Forward Sensing Camera (FSC) determines that there is a
vehicle ahead and the SCBS may operate.
Objects on the road at the entrance to a curve.
Vehicles passing in the opposite lane while making a curve.
Metal objects, bumps, or protruding objects on the road.
When passing through a toll gate.
When passing through low gates, narrow gates, car washing machines, or tunnels.
If you suddenly come close to a vehicle ahead.
2-wheeled vehicles, pedestrians, animals or standing trees.
Vehicle is driven with some of the tires having significant wear.
(Manual transaxle)
If the vehicle is stopped by the Smart City Brake Support (SCBS) operation and the clutch
pedal is not depressed, the engine stops.
▼Smart City Brake Support (SCBS)
Indicator Light (Red)
If the Smart City Brake Support (SCBS) is
operating, the indicator light (red) flashes.
▼Collision Warning
If there is the possibil
ity of a collision with
a vehicle ahead, the beep sounds
continuously and a warning is indicated in
the active driving display.
NOTE
The operation distance and volume of the
collision warning can be changed. Refer
to Personalization Features on page 9-
12.
▼ Automatic Brake
Operation Display
The automatic brake operation display is
indicated on the active driving display
after the SCBS is operated.
NOTE
The collision warning beep sounds
intermittently while the SCBS brake or
brake assist (SCBS brake assist) is
operating.
If the vehicle is stopped by the SCBS
operation and the brake pedal is not
depressed, the warning beep sounds one
time after about 2 seconds and the SCBS
brake is automatically released.
When Driving
i-ACTIVSENSE
4-126
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21
Page 259 of 624
▼Stopping the Smart City Brake
Support (SCBS) System Operation
The SCBS system can be temporarily
deactivated.
Refer to Personalization Features on page
9-12.
When the SCBS system is turned off, the
Smart City Brake Support (SCBS) OFF
indicator light turns on.
When the engine is restarted, the system
becomes operational.
When Driving
i-ACTIVSENSE
4-127
Mazda3_8GE4-EA-17F_Edition1
2017-4-7 11:59:21
Page 260 of 624

Smart Brake Support (SBS)*
The SBS system alerts the driver of a possible collision using a display and warning sound
if the radar sensor (front) and the Forward Sensing Camera (FSC ) determine that there is the
possibility of a collision with a vehicle ahead while the vehicle is being driven at about 15
km/h or faster (10 mph or faster). Furthermore, if the radar se nsor (front) and the Forward
Sensing Camera (FSC) determines that a collision is unavoidable , the automatic brake
control is performed to reduce da mage in the event of a collision.
In addition, whe n the driver depresses the brake ped al, the brakes are applied firmly and
quickly to assist. (Brake Assist (SBS brake assist))
WA R N I N G
Do not rely completely on the SBS system and always drive carefully:
The SBS is designed to reduce damage in the event of a collision, not avoid an accident. The
ability to detect an obstruction is limited de pending on the obstruction, weather conditions,
or traffic conditions. Therefore, if the accelerator pedal or brake pedal is mistakenly operated it
could result in an accident. Always verify the safety of the surrounding area and depress the
brake pedal or accelerator pedal while keeping a safer distance from vehicles ahead or
on-coming vehicles.
CAUTION
In the following cases, turn the system off to prevent a mis-operation:
The vehicle is being towed or when towing another vehicle.
The vehicle is on a chassis roller.
When driving on rough roads such as in areas of dense grass or
off-road.
NOTE
The SBS system operates when all of the following conditions are met:
The ignition is switched ON.
The SBS system is on.
The vehicle speed is about 15 km/h or faster (10 mph or faster).
The relative speed between your vehicle and the vehicle ahead is about 15 km/h or
faster (10 mph or faster).
The Dynamic Stability Control (DSC) is not operating.
When Driving
i-ACTIVSENSE
4-128*Some models.
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21
Page 261 of 624

The SBS system may not operate under the following conditions:
If the vehicle is accelerated rapidly and it comes cl ose to a vehicle ahead.
The vehicle is driven at the same speed as the vehicle ahead.
The accelerator pedal is depressed.
The brake pedal is depressed.
The steering wheel is being operated.
The selector lever is being operated.
The turn signal is being used.
When the vehicle ahead is not equipped with taillights or the taillights are turned off.
When warnings and messages, such as a dirty windshield, related to the Forward
Sensing Camera (FSC) are being di splayed in the center display.
Although the objects which activate the syst em are four-wheeled vehicles, the radar
sensor (front) could detect the following objects, determine them to be an obstruction, and
operate the SBS system.
Objects on the road at the entrance to a curve (including guardrails and snow banks).
A vehicle appears in the opposite lane while cornering or rounding a curve.
When crossing a narrow bridge.
When passing under a low gate or through a tunnel or narrow gate.
When entering an underground parking area.
Metal objects, bumps, or protruding objects on the road.
If you suddenly come close to a vehicle ahead.
When driving in areas where there is high grass or forage.
Two-wheeled vehicles such as motorbikes or bicycles.
Pedestrians or non-metallic objects such as standing trees.
When the system operates, the user is notified by the active driving display.
The SBS warning indication (amber) turn s on when the system has a malfunction.
Refer to Warning Lights on page 4-24.
When Driving
i-ACTIVSENSE
4-129
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21
Page 262 of 624
▼Smart Brake Support (SBS)
Indicator Light (Red)
If the SBS is operating,
the indicator light
(red) flashes.
▼ Collision Warning
If there is the possibil
ity of a collision with
a vehicle ahead, the beep sounds
continuously and a warning is indicated in
the active driving display.
▼ Stopping The Smart Brake Support
(SBS) System Operation
The SBS system can be temporarily
deactivated.
Refer to Personalizat
ion Features on page
9-12.
When the SBS system is turned off, the
SBS OFF indicator light turns on.
When the engine is restarted, the system
becomes operational.
NOTE
If the SBS system operation is turned off,
the Smart City Brake Support (SCBS)
system operation is turned off
simultaneously.
When Driving
i-ACTIVSENSE
4-130
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21
Page 263 of 624

Forward Sensing Camera (FSC)
Your vehicle is equipped with a Forward Sensing Camera (FSC). The Forward Sensing
Camera (FSC) is positioned near t he rearview mirror and used by the following systems.
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)
Forward Sensing Camera (FSC)
The Forward Sensing Camera (FSC) determines the conditions ahead of the vehicle while
traveling at night and detects traffic lanes. The distance in w hich the Forward Sensing
Camera (FSC) can detect objects varies depending on the surroun ding conditions.
WA R N I N G
Do not modify the suspension:
If the vehicle height or inclination is changed, the system will not be able to correctly detect
vehicles ahead. This will result in the system not operating normally or mistakenly operating,
which could cause a serious accident.
CAUTION
Do not apply accessories, stickers or film to the windshield near the Forward Sensing
Camera (FSC).
If the area in front of the Forward Sensing Camera (FSC) lens is obstructed, it will cause the
system to not operate correctly. Consequently, each system may not operate normally
which could lead to an unexpected accident.
When Driving
i-ACTIVSENSE
4-131
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21
Page 264 of 624

Do not disassemble or modify the Forward Sensing Camera (FSC).
Disassembly or modification of the Forward Se nsing 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 regard ing cleaning the interior side of the
windshield around the Forw ard 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 rearvi ew 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 no t use tires with significantly different wear
patterns on the same vehicle as the system may not operate normally.
When Driving
i-ACTIVSENSE
4-132
Mazda3_8GE4-EA-17F_Edition1 2017-4-7 11:59:21