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Mazda Radar Cruise Control (MRCC)í
The Mazda Radar Cruise Control (MRCC) system is designed to maintain headway
control*1 according to the vehicle speed using a radar sensor to detect the distance to a
vehicle ahead, and by presetting the vehicle speed between 30 km/h (19 mph) and 145
km/h (90 mph), the driver is freed from having to constantly use the accelerator or brake
pedals.
*1 Headway Control: Control of the distance between your vehicle and the vehicle ahead
detected by the Mazda Radar Cruise Control (MRCC) system.
Additionally, if your vehicle starts closing in on the vehicle ahead because, for example,
the vehicle ahead brakes suddenly, a warning sound and a warning indication in the display
are activated simultaneously to alert you to maintain a sufficient distance between the
vehicles.
Use the Mazda Radar Cruise Control (MRCC) system on expressways and other highways
which do not require a lot of repeated acceleration and deceleration.
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WARNING
Do not rely completely on the Mazda Radar Cruise Control (MRCC) system and
always drive carefully:
The Mazda Radar Cruise Control (MRCC) system is designed to reduce load on the
driver, and although it maintains a constant vehicle speed, or specifically, it
maintains a constant distance between your vehicle and the detected vehicle ahead
according to the vehicle speed, the system has detection limitations depending on the
type of vehicle ahead and its conditions, the weather conditions, and the road
conditions. Additionally, the system may be unable to decelerate sufficiently to avoid
hitting the vehicle ahead if the vehicle ahead applies the brakes suddenly or another
vehicle cuts into the driving lane, which 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.
Do not use the Mazda Radar Cruise Control (MRCC) system in the following locations.
Otherwise, it could lead to an accident:
ØRoads with sharp curves and where vehicle traffic is heavy and there is insufficient
space between vehicles. Roads where frequent and repetitive acceleration and
deceleration occur (Driving under these conditions using the Mazda Radar Cruise
Control (MRCC) system is not possible).
ØWhen entering and exiting interchanges, service areas, and parking areas of
highways (If you exit a highway while headway control is in use, the vehicle
ahead will no longer be tracked and your vehicle may accelerate to the set speed).
ØSlippery roads such as ice or snow-bound roads (The tires could spin causing you
to lose vehicle control).
ØLong descending slopes (to maintain distance between vehicles, the system
automatically and continuously applies the brakes which could result in the loss
of brake power).
For the purposes of safety, switch the Mazda Radar Cruise Control (MRCC) system off
when it is not being used.
CAUTION
If the vehicle is towed or you are towing something, switch the Mazda Radar Cruise
Control (MRCC) system off to prevent an incorrect operation.
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NOTElThe Mazda Radar Cruise Control (MRCC) system operates when all of the following conditions
are met.
lThe vehicle speed is about 30 km/h (19 mph) to 145 km/h (90 mph).lThe Mazda Radar Cruise Control (MRCC) system is turned on.lThe parking brake is not applied.lThe Smart Brake Support (SBS) is not malfunctioning.lThe Dynamic Stability Control (DSC) is operating normally.lThe selector lever is in the drive (D) position or manual (M) position (manual mode).lIn the following cases, the warnings may not activate even if your vehicle starts closing in on the
vehicle ahead.
lYou are driving at the same speed as the vehicle ahead.lDirectly after the Mazda Radar Cruise Control (MRCC) system has been set.lWhen the accelerator pedal is depressed or directly after the accelerator pedal is released.lAnother vehicle cuts into the driving lane.lThe following are not detected as physical objects.lVehicles approaching in the opposite directionlPedestrianslStationary objects (stopped vehicles, obstructions)lIf a vehicle ahead is traveling at an extremely low speed, the system may not detect it correctly.lDuring headway control travel, do not set the system on two-wheeled vehicles such as motorcycles
and bicycles.
lDo not use the Mazda Radar Cruise Control (MRCC) system under conditions in which the close
proximity warnings are frequently activated.
lDuring headway control travel, the system accelerates and decelerates your vehicle in
conjunction with the speed of the vehicle ahead. However, if it is necessary to accelerate for a lane
change or if the vehicle ahead brakes suddenly causing you to close in on the vehicle rapidly,
accelerate using the accelerator pedal or decelerate using the brake pedal depending on the
conditions.
lWhile the Mazda Radar Cruise Control (MRCC) system is in use, it does not cancel even if the
selector lever is operated and any intended engine braking will not occur. If deceleration is
required, lower the vehicle speed setting or depress the brake pedal.
lThe brake lights are illuminated while the Mazda Radar Cruise Control (MRCC) automatic
braking is operating.
lThe Mazda Radar Cruise Control (MRCC) warning light (amber) turns on when the system has a
malfunction.
Refer to Warning/Indicator Lights on page 4-22.
lThe headway control operation can be canceled and the system can be switched to only cruise
control.
Refer to Cruise Control Function on page 4-124.
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qMazda Radar Cruise Control (MRCC) Display Indication
The setting status and operation conditions of the Mazda Radar Cruise Control (MRCC)
system are indicated in the multi-information display or the active driving display (with
active driving display).
Vehicle ahead display
MRCC Set vehicle speed MRCC Distance between
vehicle display
qClose Proximity Warning
If your vehicle rapidly closes in on the
vehicle ahead because the vehicle applies
the brakes suddenly while you are
traveling in headway control, the warning
sound activates and the brake warning is
indicated in the display. Always verify the
safety of the surrounding area and depress
the brake pedal while keeping a safer
distance from the vehicle ahead.
Additionally, always keep a safer distance
from the vehicles behind you.
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qSetting the System
CANCEL switch
switch switchRES switch
OFF switch ON switch
Cruise control
SET+/SET- switch
When the ON switch is pressed, the vehicle speed and the distance between vehicles while
in headway control can be set. The Mazda Radar Cruise Control (MRCC) indication is
shown in the display of the instrument cluster.
NOTE
lWhen the ignition is switched to ACC or OFF while the Mazda Radar Cruise Control (MRCC) is
ON, the Mazda Radar Cruise Control (MRCC) remains ON automatically.
lWhen the ON switch is pressed continuously for about 2 seconds while the Mazda Radar Cruise
Control (MRCC) system is turned on, the system switches the function to only cruise control.
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How to Set the Speed
1. Adjust the vehicle speed to the desired
setting using the accelerator pedal.
2. Headway control begins when the
SET
or SETswitch is pressed.
The set speed and the inter-vehicle
distance display filled with white lines
are displayed. The Mazda Radar Cruise
Control (MRCC) indicator light (green)
is indicated simultaneously.
Travel status Display
During travel at constant
speed
During travel under
headway control
NOTElIf a vehicle ahead is detected while
traveling at a constant speed, the vehicle-
ahead indication is displayed and headway
control is performed. Additionally, when a
vehicle ahead is no longer detected, the
vehicle-ahead indication turns off and the
system switches back to travel at constant
speed.
lIf you are driving the vehicle at a speed
faster than the set speed, headway control
on the vehicle ahead is not possible Adjust
the system to the desired vehicle speed
using the accelerator pedal.
How to Set the Distance Between
Vehicles During Headway Control
The distance between vehicles is set to a
shorter distance each time the
switch
is pressed. The distance between vehicles
is set to a longer distance by pressing the
switch. The distance-between-vehicles
can be set to 4 levels; Long, medium,
short, and extremely short distance.
Distance-between-vehi-
cles guideline
(at 80 km/h (50 mph)
vehicle speed)Indication on display
Long
(about 50 m (164 ft))
Medium
(about 40 m (131 ft))
Short
(about 30 m (98 ft))
Extremely short
(about 25 m (82 ft))
NOTElThe distance between vehicles differs
depending on the vehicle speed, and the
slower the vehicle speed, the shorter the
distance.
lWhen 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.
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Changing the Set Vehicle Speed
Changing the set vehicle speed using
the SET switch
Press the SET
switch to accelerate.
Press the SET
switch to decelerate.
The set vehicle speed changes as follows
each time the SET switch is pressed.
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 accelerate using the accelerator
pedal
Depress the accelerator pedal and press
and release the SET
or SETswitch at
the desired speed. If a switch cannot be
operated, the system returns to the set
speed when you release your foot from
the accelerator pedal.
CAUTION
The warnings and brake control do
not operate while the accelerator
pedal is depressed.NOTE
lWhen accelerating using the SETswitch
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. Check the
set vehicle speed by viewing the set vehicle
speed display in the display in the
instrument cluster.
lWhen depressing the accelerator pedal, the
inter-vehicle distance display in the display
in the instrument cluster changes to the
white-line display.
lThe minimum settable speed is 30 km/h (19
mph). If the set vehicle speed reaches 30
km/h (19 mph) using the switch operation,
constant speed travel is maintained at
about 30 km/h (19 mph) even if the SET
switch is pressed. The Mazda Radar Cruise
Control (MRCC) system is not canceled.
To Deactivate
The Mazda Radar Cruise Control
(MRCC) is canceled when the OFF
switch is pressed.
When the system is temporarily
canceled
In the following cases, the Mazda Radar
Cruise Control (MRCC) system is
temporarily canceled and the“MRCC
Cancelled”indication is displayed in the
display in the instrument cluster. The
Mazda Radar Cruise Control (MRCC)
indicator light (green) turns off
simultaneously.
lThe CANCEL switch is pressed.lThe brake pedal is depressed.lThe parking brake is applied.lThe selector lever is shifted to park (P),
neutral (N) or reverse (R).
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lIn the following cases, the“MRCC
Cancelled”indication is displayed and
the beep sounds one time.
lThe vehicle speed decreases to less
than 25 km (16 mph).
lThe DSC has operated.lThe TCS has operated for a certain
period of time.
lThe Smart City Brake Support
(SCBS) has operated.
lThe Smart Brake Support (SBS) has
operated.
lWhen traveling on a down slope for
a long period of time.
lThere is a problem with the system.
NOTE
lThe Mazda Radar Cruise Control (MRCC)
system may be canceled during rain, fog,
snow or other inclement weather
conditions, or the front surface of the
radiator grille is dirty.
lIf you have temporarily canceled the Mazda
Radar Cruise Control (MRCC), you can
return to your previously set speed by
pressing the RES switch and after all of the
operation conditions have been met.
lIf the OFF switch is pressed to cancel the
Mazda Radar Cruise Control (MRCC), the
system does not return to the previously set
speed even if the RES switch is pressed.
qCruise Control Function
While this function is operating, the
headway control operation is canceled and
only the cruise control 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.
ØRoads 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)
ØSteep down slopes (Set speed may
be exceeded because sufficient
engine braking cannot be applied)
ØSlippery 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 ON switch is pressed
continuously for about 2 seconds while
the Mazda Radar Cruise Control (MRCC)
system is turned on, the system is
switched to the cruise control function.
The Mazda Radar Cruise Control
(MRCC) indicator light (green) in the
instrument cluster turns off and a message
is displayed in the multi-information
display at the same time.
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