Mazda 3 Hatchback (2018 year). Manual - part 15

Switching to cruise control function

When the MODE switch is pressed until
the system switches to the cruise main
indication (white) while the MRCC
system is turned on, the system switches to
the cruise control function.
When the system switches to the cruise
control function, the cruise main
indication (white) is displayed in the
instrument cluster and the active driving
display to notify the driver as follows:



The MRCC set indication (green) or the
MRCC main indication (white) is turned
off, and the cruise main indication
(white) is turned on.

WARNING

Always turn off the cruise control function
when it is not in use:
Leaving the cruise control function turned
on when it is not in use is dangerous as it
could operate unexpectedly, resulting in an
accident.

How to set the speed

Adjust the system to the desired vehicle
speed using the accelerator pedal.
When the SET  or SET  switch is
pressed, the cruise set indication (green) is
turned on and headway control begins.

NOTE



The system may not be able to maintain
the set speed constantly depending on
driving conditions such as steep up or
down slopes.



The speed will continue increasing while
the SET  switch is pressed and held.
The speed will continue decreasing
while the SET  switch is pressed and
held.

How to increase the set speed

The set speed can be increased using the
following operations:

To increase speed using the SET
switch

Press and hold the SET  switch and
release the switch at the desired speed.
The set speed can be adjusted
incrementally (1 km/h (1 mph)
increments) by pressing the switch and
releasing it immediately. For example, if
the switch is pressed 4 times, the set speed
increases by about 4 km/h (4 mph).

To increase speed using accelerator
pedal

Depress the accelerator pedal and press the
SET  or SET  switch at the desired
speed.
If the switch is not operated, the system
returns to the set speed after you release
your foot from the accelerator pedal.

How to Decrease the Set Speed

Press the SET  switch continuously and
release the switch at the desired speed.
The set speed can be adjusted
incrementally (1 km/h (1 mph)
increments) by pressing the switch and
releasing it immediately. For example, if
the switch is pressed 4 times, the set
vehicle speed decreases by about 4 km/h
(4 mph).

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Cancelling the function

When the cruise control function is
canceled and the RES switch is pressed
while the vehicle speed is 25 km/h (16
mph) or faster, the speed returns to the
original set speed.

Cancelling using OFF/CAN switch

When the OFF/CAN switch is pressed
once, the cruise control function is
cancelled.

Automatically cancel

The cruise control function is canceled
automatically in the following cases.



The brake pedal is depressed.



The parking brake is applied.

(Manual transaxle)



The clutch pedal is depressed.



The shift lever is shifted to neutral
position.

(Automatic transaxle)



The selector lever is shifted to P or N
position.

NOTE



If the vehicle speed decreases by about
15 km/h (9.4 mph) or more than the set
speed, the cruise control function may
be canceled.



When the vehicle speed is less than 21
km/h (13 mph), the cruise control
function is canceled. In this case, the
vehicle speed will not return to the
original set speed even if the vehicle is
accelerated to 25 km/h (16 mph) or
faster and the RES switch is pressed.
Reset the cruise control function.

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Lane-keep Assist System (LAS) & Lane Departure

Warning System (LDWS)

*

The LAS&LDWS alerts the driver that the vehicle may be deviating from its lane and it
provides steering assistance to help the driver stay within the vehicle lanes.
The Forward Sensing Camera (FSC) detects the white lines (yellow lines) of the vehicle
lane in which the vehicle is traveling and if the system determines that the vehicle may
deviate from its lane, it operates the electric power steering to assist the driver's steering
operation. The system also alerts the driver by activating a lane departure warning sound,
vibrating the steering wheel, and indicating an alert in the display. Use the system when you
drive the vehicle on roads with white (yellow) lines such as expressways and highways.
Refer to Forward Sensing Camera (FSC) on page 4-131.

Forward Sensing 
Camera (FSC)

WARNING

Do not rely completely on the LAS&LDWS:

The LAS&LDWS is not an automatic driving system. In addition, the system is not designed

to compensate for a driver's lack of caution, and over-reliance on the system could lead to
an accident.

The detection ability of the LAS&LDWS is limited. Always stay on course using the steering

wheel and drive with care.

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*Some models.

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Do not use the LAS&LDWS in the following cases:
The system may not operate adequately according to the actual driving conditions, resulting
in an accident.

Driving on roads with tight curves.
Driving under bad weather conditions (rain, fog, and snow).
Slippery roads such as ice or snow-bound roads.
Roads with heavy traffic and insufficient distance between vehicles.
Roads with no white (yellow) lane lines.
Narrow roads resulting from road construction or lane closures.
The vehicle is driven on a temporary lane or section with a closed lane resulting from road

construction where there may be multiple white (yellow) lane lines or they are interrupted.

Vehicle is driven on roads other than expressways and highways.
The tire pressures are not adjusted to the specified pressure.
Tires of a different specified size are used, such as an emergency spare tire.

CAUTION

Heed the following cautions so that the LAS&LDWS can operate normally.

Do not modify the suspensions.
Always use wheels of the specified type and size for the front and rear wheels. Consult an

Authorized Mazda Dealer for tire replacement.

NOTE



When the turn signal lever is operated for a lane change, the LAS&LDWS is
automatically disabled. The LAS&LDWS becomes operational again when the turn signal
lever is returned and the system detects white (yellow) lane lines while the vehicle is being
driven normally within its vehicle lane.



If the steering wheel, accelerator pedal, or brake pedal is operated abruptly and the
vehicle moves close to a white (yellow) line, the system determines that the driver is
making a lane change and the LAS&LDWS operation is temporarily canceled. The
LAS&LDWS becomes operational again when the system detects white (yellow) lane lines
while the vehicle is being driven normally within its vehicle lane.



If the vehicle deviates from its lane repeatedly within a short period of time, the
LAS&LDWS may not operate.



When white (yellow) lane lines are not detected, the LAS&LDWS does not operate.



Under the following conditions, the LAS&LDWS may not be able to detect white (yellow)
lane lines correctly and it may not operate normally.



If an object placed on the dashboard is reflected in the windshield and picked up by the
camera.

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

Heavy luggage is loaded in the luggage compartment or on the rear seat and the
vehicle is tilted.



The tire pressures are not adjusted to the specified pressure.



Tires other than conventional tires are equipped.



Vehicle is driven on an intersection or junction, or on a forked road.



The white (yellow) lane lines are less visible because of dirt or fading/patchiness.



A vehicle in front of your vehicle is running near a white (yellow) lane line making it
less visible.



A white (yellow) lane line is less visible because of bad weather (rain, fog, or snow).



The vehicle is driven on a temporary lane or section with a closed lane resulting from
construction where there may be multiple white (yellow) lane lines or they are
interrupted.



A misleading line is picked up on the road such as a temporary line for construction, or
because of shade, lingering snow, or grooves filled with water.



The surrounding brightness suddenly changes such as when entering or exiting a
tunnel.



The illumination of the headlights is weakened because of dirt or the optical axis is
deviated.



The windshield is dirty or foggy.



The windshield, camera is fogged (water droplets).



Back-light is reflected off the road surface.



The road surface is wet and shiny after rain, or there are puddles on the road.



The shade of a guardrail parallel to a white (yellow) lane line is cast on the road.



The width of the driving lane is narrow or wide.



Driving on roads with tight curves.



The road is excessively uneven.



The vehicle is shaken after hitting a road bump.



There are two or more adjacent white (yellow) lane lines.



There are various road markings or lane markings of various shapes near an
intersection.

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▼ System Operation

If the LAS&LDWS OFF indicator light in the instrument cluster turns off when the ignition
is switched ON, the system goes on standby.
 
If the LAS&LDWS OFF indicator light in the instrument cluster turns on when the ignition
is switched ON, press the LAS&LDWS OFF switch so that the system goes on standby.

Drive the vehicle in the center of the vehicle lane while the system is on standby. The
system becomes operational when all of the following conditions are met.



The engine is running.



The vehicle speed is about 60 km/h (37 mph) or faster.



The system detects white (yellow) lane lines.
(If the system only detects a white (yellow) line on either the left or right the system only
operates for a departure in the direction being detected.)



The driving lane is neither narrow nor wide.

 
The LAS&LDWS goes on stand-by status in the following cases:



The system cannot detect white (yellow) lane lines.



The vehicle speed is less than about 60 km/h (37 mph).



The ABS/TCS/DSC is operating.



The DSC is turned off.
(If the DSC is turned off while the system is operational, a warning beep is heard and the
system goes on standby.)



The vehicle is making a sharp curve.



The steering wheel is operated abruptly.



The brake pedal is depressed.



The width of a lane is excessively narrow or wide.

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NOTE



The LAS&LDWS does not operate until the system detects white (yellow) lane lines on
either the left or right.



When the system detects a white (yellow) lane line on one side only, the system will not
operate the steering wheel operation assist and the warning for the lane line on the side
that is not being detected. The steering wheel operation assist and the warning is only for
a lane deviation on the side that is being detected.



If you take your hands off the steering wheel (not holding the steering wheel), the warning
sound is activated and an alert is indicated in the active driving display.
 

If the steering wheel is held lightly, or depending on the road conditions, the system may
detect that you have released the steering wheel (not holding the steering wheel) even if
you are holding it, and display a message in the active driving display.



The timing at which the lane departure warning is activated and the steering wheel
operation assist is performed varies.



The following settings for the LAS&LDWS can be changed. Refer to Personalization
Features on page 9-12.



Steering operation assist operational/non-operational



Cancel sensitivity (likelihood of steering assist)

Vehicle lane line display
When the LAS&LDWS detects white (yellow) lines on both the left and right sides and
becomes operational, the vehicle lane lines are indicated in the active driving display.

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Auto cancel

In the following cases, the LAS&LDWS is automatically canceled and the vehicle lane lines
(stand-by) are indicated in the active driving display. In addition, when the LAS&LDWS
becomes operational, the system turns back on automatically and the vehicle lane lines
(operational) are indicated in the active driving display.



The temperature inside the camera is high or low.



The windshield around the camera is foggy.



The windshield around the camera is blocked by an obstruction, causing poor forward
visibility.

Auto cancel of warning/steering assist

When the following operations are performed, the LAS&LDWS operation is automatically
canceled. The LAS&LDWS is automatically re-enabled after the operation.



The steering wheel is operated abruptly.



The brake pedal is depressed.



The accelerator pedal is suddenly depressed.
(To cancel the automatic sensitivity cancel function, deselect “Cancel sensitivity” in the
personalization features setting.)



The turn signal lever is operated.



The vehicle crosses a lane line.

NOTE



After the operation, the LAS&LDWS operation may not operate for a period of 5 seconds
at the most until the lane lines are detected.



Under the following conditions, the LAS&LDWS cancels the warning/steering assist
automatically.



The driver takes his/her hands off the steering wheel.
(The LAS&LDWS is designed to assist the driver's steering operation and it will resume
operation automatically when the driver holds the steering wheel.)



The DSC OFF switch is pressed to cancel the DSC.

Steering operation assist OFF (non-operational)

The steering operation assist for the LAS&LDWS can be changed to non-operational (OFF).
Refer to Setting Change (Personalization Features) on page 9-12.
When the steering operation assist has been changed to inoperable (OFF), operate the
LAS&LDWS as follows:

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System operation
If the LAS&LDWS OFF indicator light in the instrument cluster turns off when the ignition
is switched ON, the system goes on standby.
 
If the LAS&LDWS OFF indicator light in the instrument cluster turns on when the ignition
is switched ON, press the LAS&LDWS OFF switch so that the system goes on standby.

Drive the vehicle in the center of the vehicle lane while the system is on standby. The
system becomes operational when all of the following conditions are met.



The system detects white (yellow) lane lines on both the right and left sides, or on either
side.



The vehicle speed is about 60 km/h (37 mph) or faster.



The vehicle is driven on a straight road or road with gentle curves.



The engine is running.

The LAS&LDWS goes on stand-by status in the following cases:



The system cannot detect white (yellow) lane lines.



The vehicle speed is less than about 60 km/h (37 mph).



The vehicle is making a sharp curve.



The vehicle is making a curve at an inappropriate speed.

NOTE



The LAS&LDWS remains on stand-by until it detects white (yellow) lines on both the left
and right sides, or on either side.



When the system detects a white (yellow) lane line on one side only, the system will not
activate warnings for the lane line on the side that is not being detected.



The distance and warning sensitivity (likelihood of a warning) which the system uses to
determine the possibility of a lane departure can be changed.
Refer to Setting Change (Personalization Features) on page 9-12.

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Vehicle lane line display
When the LAS&LDWS detects white (yellow) lines on both the left and right sides and
becomes operational, the vehicle lane lines are indicated in the active driving display.

Auto cancel
Under the following conditions, the LAS&LDWS is automatically canceled. The
LAS&LDWS is automatically re-enabled when it becomes operational.



The temperature inside the camera is high or low.



The windshield around the camera is foggy.



The windshield around the camera is blocked by an obstruction, causing poor forward
visibility.

(Auto cancel of warnings)
When the following operations are performed, the LAS&LDWS determines that the driver
intends to make a lane change and the system operation is canceled automatically. The
LAS&LDWS resumes automatically after the operation.



The steering wheel is operated abruptly.



The brake pedal is depressed.



The accelerator pedal is depressed.
(To cancel the automatic sensitivity cancel function, deselect “Warning sensitivity” in the
personalization features setting.)



The turn signal lever is operated.



The vehicle crosses a lane line.

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▼ System Canceling

When the LAS&LDWS is turned off,
press the LAS&LDWS OFF switch.

The LAS&LDWS OFF indicator light
turns on.

NOTE



In the following cases, the LAS&LDWS
is canceled automatically and the
LAS&LDWS OFF indicator light turns
on. Have your vehicle inspected at an
Authorized Mazda Dealer.



There is a malfunction in the power
steering.



There is a malfunction in the DSC.



There is a malfunction in the Forward
Sensing Camera (FSC).



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 lane-keep
system operable, the system will be
operable when the ignition is switched
ON the next time.

When the LAS&LDWS is canceled, the
vehicle lane lines are no longer indicated
in the active driving display.

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▼ Lane Departure Warning

When the system determines that the vehicle might be deviating from its lane, the following
warnings are activated:



A beep sound or rumble sound

*1

 is activated, or the steering wheel vibrates.



The LAS&LDWS warning light flashes.



The active driving display lane indication flashes (side which vehicle might be deviating
to).

Warning light (Flashes)

Active Driving Display

NOTE



If you have set the lane departure warning sound to the beep sound/rumble sound

*1

setting, the warning sound may not be heard depending on the surrounding noise
conditions.



If you have set the lane departure warning system to the steering wheel vibrations setting,
the vibration may not be felt depending on the road surface conditions.



When the setting for the steering operation assist is changed to operational, the warnings
can be set to activate/not activate. (When the setting for the steering operation assist is
changed to non-operational, the warnings cannot be set to not activate.)
Refer to Setting Change (Personalization Features) on page 9-12.

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

The LAS&LDWS can be changed to the following settings regardless of whether the
steering operation assist has been set to operational/non-operational. Always check the
setting status when driving the vehicle and make setting changes if necessary.
Refer to Setting Change (Personalization Features) on page 9-12.



Steering wheel vibration: Strong/weak



Warning sound volume



Types of warnings (steering wheel vibration/beep sound/rumble sound

*1

)

*

1 A rumble strip is a series of grooves in the road pavement surface positioned at specific

intervals, and when the vehicle passes over it a vibration and rumble sound is produced
which alerts the driver that the vehicle is departing from the lane.
The rumble sound is a reproduction of the sound which occurs when a vehicle passes
over a rumble strip.

Rumble

Groove

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Smart City Brake Support (SCBS)

*

The SCBS system alerts the driver of a possible collision using an indication in the display
and a warning sound when the Forward Sensing Camera (FSC) detects a vehicle ahead and
determines that a collision with a vehicle ahead is unavoidable while the vehicle is being
driven at a vehicle speed of about 4 to 80 km/h (2 to 50 mph). In addition, the system
reduces damage in the event of a collision by operating the brake control (Smart City Brake
Support (SCBS) brake) when the system determines that a collision is unavoidable while the
vehicle is being driven at a vehicle speed of about 4 to 30 km/h (2 to 18 mph). It may also
be possible to avoid a collision if the relative speed between your vehicle and the vehicle in
front of you is less than about 20 km/h (12 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 firmly and quickly to assist. (Brake Assist (Smart City Brake Support
(SCBS) brake assist))
 

Forward Sensing 
Camera (FSC)

WARNING

Do not rely completely on the SCBS system:

The SCBS system is only designed to reduce damage in the event of a collision. Over reliance

on the system leading to the accelerator pedal or brake pedal being mistakenly operated
could result in an accident.

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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 Support (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 driver 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.

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

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 possibility 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.

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