engine MAZDA MODEL CX-3 2021 Repair Manual

NOTE
In the following cases, the warnings and brakes may not operate even if your vehicle starts
closing in on the vehicle ahead.
You are driving your vehicle at the same speed as the vehicle ahead.
Directly after the MRCC with Stop & Go function system has been set.
Directly after the accelerator pedal is released.
Another vehicle cuts into the driving lane.
▼ Setting the System
The MRCC with Stop & Go function system ope
rates when all of the following conditions
are met.
Vehicle speed is 0 km/h (0 mph) to 145 km/h (90 mph)
The MRCC with Stop & Go function is turned on.
The brake pedal is not depressed.
The electric parking brake (EPB) is released (electric parking brake (EPB) indicator light
is turned off).
There is no problem with the DSC.
All the doors are closed.
The driver's seat belt is fastened.
The selector lever is in the drive (D) pos ition or manual (M) position (manual mode).
NOTE
In the following cases, the MRCC with Stop & Go function system is canceled when the
vehicle is traveling at 30 km/h (20 mph) or less and “MRCC Disabled under 30 km/h (20
mph)” is displayed in th e active driving display.
The Forward Sensing Camera (FSC) cannot de tect target objects (There is problem
with the Forward Sensing Camera (FSC) or windshield is dirty).
There is a problem with the stop hold control function.
There is a problem with the electric parking brake (EPB).
It may not be possible to set the MRCC with Stop & Go f unction system directly after
starting the engine, while the DSC operation is being checked.
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NOTE
The distance-between-vehicles differs depending on the vehicle speed, and the slower the
vehicle speed, the shorter the distance.
When the ignition is switched to ACC or OFF and then the engine is started again, the
system automatically sets the distance-between-vehicles to the previous setting.
How to change the set vehicle speed
To accelerate/decelerate using the SET
switch
When you press the SET
switch, the
vehicle accelerates and when you press the
SET
switch, it decelerates.
Short press 1 km/h (1 mph)
Long press 10 km/h (5 mph)
NOTE
For example, the set vehicle speed is
changed by pressing the SET switch four
times as follows:
The vehicle speed accelerates or
decelerates by 4 km/h (4 mph).
To increase speed using accelerator
pedal
Depress the accelerator pedal and press
and release the SET
switch 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.
CAUTION
The warnings and brake control do not
operate while the accelerator pedal is
depressed.
NOTE
The setting speed can be changed by
operating the SET
switch or SET
switch during stop hold control.
When accelerating using the SET
switch while in headway control, the set
vehicle speed can be adjusted but
acceleration is not possible. If there is
no longer a vehicle ahead, acceleration
continues until reaching the set vehicle
speed. For the set vehicle speed, check
the set vehicle speed indication in the
display.
While depressing the accelerator pedal,
the color of the MRCC with Stop & Go
function indication changes from green
to white.
Canceling the system
If any of the following operations is done,
the MRCC with Stop & Go function
cancels temporarily, the MRCC with Stop
& Go function set indication (green)
switches to the MRCC with Stop & Go
function main indication (white), and the
MRCC with Stop & Go function set
indicator light (green) turns off at the same
time.
The OFF/CANCEL switch is pressed.
The brake pedal is depressed.
The electric parking brake (EPB) is
applied.
The selector lever is in the P (Park), N
(Neutral), or R (Reverse) position.
Any of the doors is opened.
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The driver's seat belt is unfastened.

Under the following conditions, the
MRCC with Stop & Go function cancel
indication is displayed in the active
driving display and a single beep sound is
heard.
The DSC has operated.
The Smart Brake Support (SBS) has
operated.
The Smart City Brake Support (SCBS)
or Advanced Smart City Brake Support
(Advanced SCBS) has operated.
When traveling on a downslope for a
long period of time.
There is a problem with the system.
The engine has stalled.
The electric parking brake (EPB) is
automatically applied during stop hold
control.
The radar sensor (front) cannot detect
target objects (during rain, fog, snow or
other inclement weather conditions, or
when the radiator grille is dirty).
Resuming control
If the MRCC with Stop & Go function
system is canceled, you can resume
control at the previously set speed by
pressing the RES switch and after all of
the operation conditions have been met.
NOTE
If the set speed is not indicated in the
display, the control does not resume even
if the RES switch is pressed.
Turning off the system
Press the OFF/CANCEL switch two times
while the MRCC with Stop & Go function
system is operating to switch off the
system.
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Resume driving information
If you do not resume driving within a few sec onds after the vehicle ahead starts moving, the
active driving display vehicle-ahead indication flashes to urge the driver to resume driving.
▼ Cruise Control Function
While this function is operating, the
headway control operation is canceled and
only the cruise contro
l function operates.
The vehicle speed can be set more than
about 25 km/h (16 mph).
Use the cruise control function on
expressways and other highways which do
not require a lot of repeated acceleration
and deceleration.
WARNING
Do not use the cruise control function in
the following locations:
Otherwise, it could lead to an accident.
 Roads with sharp curves and where
vehicle traffic is heavy and there is
insufficient space between vehicles.
(Driving under these conditions using the
cruise control function is not possible)
 Steep down slopes (Set speed may be
exceeded because sufficient engine
braking cannot be applied)
 Slippery roads such as ice or snow-bound
roads (Tires could spin causing you to
lose vehicle control)
Always drive carefully:
The warnings and brake control will not
operate after the headway control function
is canceled and the system is switched to
only the cruise control function. Depress
the brake pedal to decelerate according to
the surrounding conditions while keeping a
safer distance from the vehicle ahead and
always driving carefully.
Switching to cruise control function
When the MODE switch is pressed until
the system switches to the cruise main
indication (white) while the MRCC with
Stop & Go function system is turned on,
the system switches to the cruise control
function.
When the system switches to the cruise
control function, the indicator and active
driving display notify the driver as
follows:
The MRCC with Stop & Go function set
indication (green) or the MRCC with
Stop & Go function main indication
(white) is turned off, and the cruise main
indication (white) is turned on.
WA R N I N G
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.
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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 Advanced Smart City Brake Support (Advanced SCBS) System Operation
on page 4-118 on how to turn off the Advanced SCBS system.
NOTE
The Advanced SCBS system will operate under the following conditions.
The engine is running.
The Smart City Brake Support (SCBS) wa rning light(amber) does not illuminate.
(Object is vehicle ahead)
The vehicle speed is between about 4 to 80 km/h (2 to 50 mph).
(Object is a pedestrian)
The vehicle speed is between about 10 to 80 km/h (6.2 to 50 mph).
The Advanced SCBS system is not turned off.
Under the following conditions, the Advan ced SCBS system may not operate normally:
The Advanced 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.
In the following cases, the Advanced SCBS may operate.
Objects on the road at the entrance to a curve.
Vehicles passing in the opposite lane while making a curve.
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, animals, or standing trees.
(Manual transaxle)
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If the vehicle is stopped by the SCBS operation and the clutch pedal is not depressed, the
engine stops.
▼ Smart City Brake Support (SCBS)
Indicator Light (Red)
If the Advanced 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
(Without SCBS OFF switch)
The operation distance and volume of
the collision warning can be changed.
Refer to Personalization Features on
page 9-9.
(With SCBS OFF switch)
The operation distance and volume of
the collision warning can be changed.
Consult an Authorized Mazda Dealer.
▼ Automatic Brake Operation Display
The automatic brake operation display is
indicated on the active driving display
after the Advanced SCBS is operated.
NOTE
The collision warning beep sounds
intermittently while the Advanced SCBS
brake or brake assist (Advanced SCBS
brake assist) is operating.
If the vehicle is stopped by the Advanced
SCBS operation and the brake pedal is
not depressed, the warning beep sounds
1 time after about 2 seconds and the
Advanced SCBS brake is automatically
released.
▼Stopping the Advanced Smart City
Brake Support (Advanced SCBS)
System Operation
The Advanced SCBS system can be
temporarily deactivated.
When the Advanced SCBS system is
turned off, the Sma
rt City Brake Support
(SCBS) OFF indicator light turns on.

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When the engine is restarted, the system
becomes operational.
Without SCBS OFF switch
Refer to Personalization Features on page
9-9.
NOTE
When the Advanced SCBS system is set to
inoperable, the Smart Brake Support
(SBS) are also set to inoperable.
With SCBS OFF switch
Press the SCBS OFF switch to turn off the
system. The Smart City Brake Support
(SCBS) OFF indicator light in the
instrument cluster will illuminate.
Press the switch again to turn the system
back on. The Smart City Brake Support
(SCBS) OFF indicator light will turn off.
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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 Ci ty Brake Support (SCBS) system Operation on page 4-122 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.
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.
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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
(Without SCBS OFF switch)
The operation distance and volume of
the collision warning can be changed.
Refer to Personalization Features on
page 9-9.
(With SCBS OFF switch)
The operation distance and volume of
the collision warning can be changed.
Consult an Authorized Mazda Dealer.
▼ 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 1
time after about 2 seconds and the SCBS
brake is automatically released.
▼ Stopping the Smart City Brake
Support (SCBS) System Operation
The SCBS system can be temporarily
deactivated.
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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.
Without SCBS OFF switch
Refer to Personalization Features on page
9-9.
NOTE
When the SCBS system is set to
inoperable, the Smart Brake Support
(SBS) are also set to inoperable.
With SCBS OFF switch
Press the SCBS OFF switch to turn off the
system. The Smart City Brake Support
(SCBS) OFF indicator light in the
instrument cluster will illuminate.
Press the switch agai n to turn the system
back on. The Smart City Brake Support
(SCBS) OFF indicator light will turn off.
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 sensor (front) and the Forward
Sensing Camera (FSC) determines that a
collision is unavoidable, the automatic
brake control is pe rformed to reduce
damage in the event of a collision.
In addition, when the driver depresses the
brake pedal, 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 depending 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.
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