Mazda 3 Owners Manual: Mazda Radar Cruise Control
(MRCC)
The Mazda Radar Cruise Control (MRCC) system is designed to maintain headway
control *1
according to the vehicle speed using a radar sensor (front) 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 expressway
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 specifi
cally, 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 suffi ciently 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:
- Roads with sharp curves and where vehicle traffi c is heavy and
there is insuffi cient
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).
- When 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).
- Slippery roads such as ice or snow-bound roads (The tires could
spin causing you to
lose vehicle control).
- Long 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. |
NOTE
- The Mazda Radar Cruise Control (MRCC) system operates when all
of the following
conditions are met.
- The vehicle speed is about 30 km/h (19 mph) to 145 km/h (90 mph).
- The Mazda Radar Cruise Control (MRCC) system is turned on.
- The parking brake is not applied.
- The Forward Obstruction Warning (FOW) warning light (amber) does not
illuminate.
- The Dynamic Stability Control (DSC) is operating normally.
- The shift lever is in a position other than reverse (R) or neutral
(N).
- The clutch pedal is not depressed.
- The selector lever is in the drive (D) position or manual (M)
position (manual mode).
- In the following cases, the warnings may not activate even if
your vehicle starts closing in
on the vehicle ahead.
- You are driving at the same speed as the vehicle ahead.
- Directly after the Mazda Radar Cruise Control (MRCC) system has
been set.
- When the accelerator pedal is depressed or directly after the
accelerator pedal is
released.
- Another vehicle cuts into the driving lane.
- The following are not detected as physical objects.
- Vehicles approaching in the opposite direction
- Pedestrians
- Stationary objects (stopped vehicles, obstructions)
- If a vehicle ahead is traveling at an extremely low speed, the system
may not detect it
correctly.
- During headway control travel, do not set the system on two-wheeled
vehicles such as
motorcycles and bicycles.
- Do not use the Mazda Radar Cruise Control (MRCC) system under
conditions in which
the close proximity warnings are frequently activated.
- During 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.
- While the Mazda Radar Cruise Control (MRCC) system is in use, it does
not cancel even
if the selector lever (automatic transaxle)/shift lever (manual transaxle)
is operated and
any intended engine braking will not occur. If deceleration is required,
lower the vehicle
speed setting or depress the brake pedal.
- The brake lights are illuminated while the Mazda Radar Cruise Control
(MRCC)
automatic braking is operating.
- The Mazda Radar Cruise Control (MRCC) warning light (amber) turns on
when the
system has a malfunction.
Refer to Warning/Indicator Lights on .
Mazda Radar Cruise Control (MRCC) Display Indication
The setting status and operation conditions of the Mazda Radar Cruise Control
(MRCC)
system are indicated in the active driving display.
Close 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.
Setting the System
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 active driving display.
NOTE
Whben 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.
How to Set the Speed
- Adjust the vehicle speed to the desired
setting using the accelerator pedal.
- Headway control begins when the
SET or SET switch 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 |
|
NOTE
- If 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.
- If 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-betweenvehicles
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)) |
|
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.
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 SET switch 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
- 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. Check the set vehicle speed by
viewing the set vehicle speed display in
the active driving display.
- When depressing the accelerator pedal,
the inter-vehicle distance display in the
active driving display changes to the
white-line display.
- The 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.
- The CANCEL switch is pressed.
- The brake pedal is depressed.
- The parking brake is applied.
- (Automatic transaxle)
The selector lever is shifted to park (P),
neutral (N) or reverse (R).
- (Manual transaxle)
The shift lever is in the reverse (R)
position .
- In the following cases, the ”MRCC
Cancelled” indication is displayed and
the beep sounds one time.
- The vehicle speed decreases to less
than 25 km (16 mph).
- The DSC has operated.
- The TCS has operated for a certain
period of time.
- The Smart City Brake Support (SCBS)
has operated.
- When traveling on a down slope for a
long period of time.
- There is a problem with the system.
- The shift lever is shifted to neutral (N)
for a certain period of time.
- The clutch is depressed for a certain
period of time.
- The engine stalls.
NOTE
- The 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.
- If the Mazda Radar Cruise Control
(MRCC) system has been temporarily
canceled, you can return to the
previously set vehicle speed by pressing
the RESUME switch after the following
conditions have been met.
- All of the Mazda Radar Cruise
Control (MRCC) operation
conditions have been met.
- A certain period of time has elapsed
since the system was automatically
canceled while driving for a long
time on a down slope.
- If the SET /SET or RESUME switch
is pressed before a certain period of
time has elapsed since the system was
automatically canceled while driving
for a long time on a down slope,
“MRCC Not available” is displayed in
the display.
- If 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.
Shift-up/Shift-down Request
Display (Manual Transaxle)
The shift-up or shift-down request display
in the active driving display may be
displayed while the Mazda Radar Cruise
Control (MRCC) system is operating.
When this occurs, shift gears because the
gear position is not appropriate.
Request |
Indication on display |
Shift up |
|
Shift down |
|
NOTE
- If the gears are not shifted up even
though the shift-up request indication
is displayed, load will be applied
to the engine and the Mazda Radar
Cruise Control (MRCC) system may
be automatically canceled or engine
damage could occur.
- If the gears are not shifted down even
though the shift-down request indication
is displayed, the Mazda Radar Cruise
Control (MRCC) system may be
automatically canceled or engine
stalling could occur.
Forward Obstruction Warning (FOW) is a system which alerts the driver of a
possible
collision using an indicator and warning sound in the instrument cluster while
the vehicle
is being driven at ...
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the event
of a collision by operating the brake control (SCBS brake) when the system's
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