engine MAZDA MODEL MX-5 MIATA RF 2021 Repair Manual

▼DSC OFF Indicator Light
This indicator light
stays on for a few
seconds when the ignition is switched ON.
It also illuminates when the DSC OFF
switch is pressed and TCS/DSC is
switched off.
Refer to DSC OFF Switch on page 4-69.

If the light remains i lluminated and the
TCS/DSC is not switched off, take your
vehicle to an Authorized Mazda Dealer.
The DSC may have a malfunction.
▼ DSC OFF Switch
Press the DSC OFF sw
itch to turn off the
TCS/DSC. The DSC OFF indicator light
in the instrument cluster will illuminate.
Press the switch a gain to turn the
TCS/DSC back on. The DSC OFF
indicator light will turn off.
NOTE
When DSC is on and you attempt to free
the vehicle when it is stuck, or drive it
out of freshly fallen snow, the TCS (part
of the DSC system) will activate.
Depressing the accelerator will not
increase engine power and freeing the
vehicle may be difficult. When this
happens, turn off the TCS/DSC.
If the TCS/DSC is off when the engine is
turned off, it automatically activates
when the ignition is switched ON.
Leaving the TCS/DSC on will provide
the best traction.
If the DSC OFF switch is pressed and
held for 10 seconds or more, the DSC
OFF switch malfunction detection
function operates and the DSC system
activates automatically. The DSC OFF
indicator light turn s off while the DSC
system is operative.
When Driving
ABS/TCS/DSC
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Drive Selection*
Drive selection is a system to switch the vehicle's drive mode. When the sport mode is
selected, the vehicle's response against accelerator operation is enhanced. This provides
additional quick acceleration which may be needed to safely mak e maneuvers such as lane
changes, merging onto freeways, or passing other vehicles.
CAUTION
Do not use the sport mode when driving on slip pery roads such as wet or snow-covered roads.
It may cause tire slipping.
NOTE
When sport mode is selected, driving at higher engine speeds may increase fuel
consumption. Mazda recommends that you cancel sport mode for normal driving.
Drive mode cannot be switched in the following conditions:
ABS/TCS/DSC is operating
Cruise control is operating.
Steering wheel is being operated abruptly
▼ Drive Selection Switch
Press the drive sele
ction switch forward
(“
”) to select the sport mode.
Pull the drive selection switch back
(“
”) to cancel the sport mode.

NOTE
In the following cases, the drive
selection is canceled.
The ignition is switched OFF.
Cruise control is set.
Depending on the driving conditions
when sport mode is selected, the vehicle
may perform shift-down or slightly
accelerate.
When Driving
Drive Selection
4-70*Some models.
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Power Steering
Power steering is only operable when
the engine is running. If the engine is off
or if the power steering system is
inoperable, you can still steer, but it
requires more physical effort.
If the steering feels stiffer than usual
during normal driving or the steering
vibrates, consult an Authorized Mazda
Dealer.
The warning light not ifies the driver of
system abnormalities and operation
conditions.
Refer to Warning Indication/Warning
Lights on page 4-27.
CAUTION
Never hold the steering wheel to the
extreme left or right for more than 5
seconds with the engine running. This
could damage the power steering system.
When Driving
Power Steering
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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 City Brake Support (SCBS) system Operation on page 4-102 on
how to turn off the SCBS system.
NOTE
The SCBS system will operate under the following conditions.
The engine is running.
The Smart City Brake Support (SCBS) system warning indication/warning light (amber)
does not illuminate.
(Rear-end coll ision 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 pa rtial 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.
When Driving
i-ACTIVSENSE
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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 transmission)
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 Bra
ke Support (SCBS) is
operating, the indicator light (red) flashes.

▼ Collision Warning*
If there is the possibili
ty of a collision with
a vehicle ahead, the beep sounds
continuously and a warning is indicated in
the multi-inform ation display.
NOTE
The operation distance and volume of the
collision warning can be changed. Refer
to the Settings se ction in the Mazda
Connect Owner's Manual.
▼ Automatic Brake Operation
Display*
The automatic brake operation display is
indicated on the multi-information 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.
When Driving
i-ACTIVSENSE
*Some models.4-101
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▼Stopping the Smart City Brake
Support (SCBS) System Operation
The SCBS system can be temporarily
deactivated.
Refer to the Settings section in the Mazda
Connect Owner's Manual.
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
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▼To Decrease Cruising Speed
Press the SET/ switch and hold it. The
vehicle will gradually slow.
Release the switch at the desired speed.

Press the SET/
switch and release it
immediately to adjust the preset speed.
Multiple operations will decrease the
preset speed according to the number of
times it is operated.
Decreasing speed with a single SET/
switch operation
Instrument cluster display for vehicle
speed indicated in km/h: 1 km/h (0.6 mph)
Instrument cluster display for vehicle
speed indicated in mph: 1 mph (1.6 km/h)
▼ To Resume Cruising Speed at More
Than 25 km/h (16 mph)
If the cruise contro
l system temporarily
canceled (such as by applying the brake
pedal) and the system is still activated, the
most recent set speed will automatically
resume when the RESUME/
switch is
pressed.
If vehicle speed is below 25 km/h (16
mph), increase the vehicle speed up to 25
km/h (16 mph) or more and press the
RESUME/
switch.
▼ To Temporarily Cancel
To temporarily cancel the system, use one
of these methods:
Slightly depress the brake pedal.
(Manual transmission)
Depress the clutch pedal.
Press the OFF/CANCEL switch.
If the RESUME/
switch is pressed when
the vehicle speed is 25 km/h (16 mph) or
higher, the system reverts to the previously
set speed.
NOTE
If any of the following conditions occur,
the cruise control system is temporarily
canceled.
The parking brake is applied.
(Automatic transmission)
The selector lever is in the P or N
position.
(Manual transmission)
The shift lever is in the neutral
position.
When the cruise control system is
temporarily canceled by even one of the
applicable cancel conditions, the speed
cannot be re-set.
(Automatic transmission)
The cruise control cannot be cancelled
while driving in manual mode (selector
lever shifted from D to M position).
Therefore, engine braking will not be
applied even if the transmission is
shifted down to a lower gear. If
deceleration is required, lower the set
speed or depress the brake pedal.
When Driving
Cruise Control
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Operating Tips
Operate the climate control system with
the engine running.
To prevent the battery from being
discharged, do not leave the fan control
dial on for a long period of time with the
ignition switched ON when the engine is
not running.
Clear all obstructions such as leaves,
snow and ice from the hood and the air
inlet in the cowl grille to improve the
system efficiency.
Use the climate control system to defog
the windows and dehumidify the air.
The recirculate mode should be used
when driving through tunnels or while
in a traffic jam, or when you would like
to shut off outside air for quick cooling
of the interior.
Use the outside air position for
ventilation or windshield defrosting.
If the vehicle has been parked in direct
sunlight during hot weather, open the
windows to let warm air escape, then
run the climate control system.
Run the air cond itioner about 10
minutes at least once a month to keep
internal parts lubricated.
Have the air conditioner checked before
the weather gets hot . Lack of refrigerant
may make the air conditioner less
efficient.
The refrigerant specifications are
indicated on a label attached to the
inside of the engine compartment. If the
wrong type of refrigerant is used, it
could result in a ser ious malfunction of
the air conditioner. Consult a
professional, government certified
repairer for the inspection or repair
because a special device is required for
the air conditi oner maintenance.
For details, consult an Authorized
Mazda Dealer.
Label
Interior Features
Climate Control System
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▼Control Switches
Temperature control dial
This dial controls t
emperature. Turn it
clockwise for hot and counterclockwise
for cold.
NOTE
(Type A)
When the mode is set to
, or a
position in between them with the fan
control dial in a position other than 0 and
the temperature control dial in the
maximum cold position, the air intake
selector switches to the recirculated air
position and the A/C turns on
automatically.
If A/C is not desired, press the A/C switch
to turn it off.
Fan control dial
This dial allows variable fan speeds.
The fan has seven speeds.
Mode selector dial
Turn the mode selector dial to select
airflow mode (page 5-4).
NOTE
The mode selector dial can be set at the
intermediate positions (
) between each
mode. Set the dial to an intermediate
position if you want to split the airflow
between the two modes.
For example, when the mode selector
dial is at the
position between the
and positions, airflow from the floor
vent is less than that of the
position.
A/C switch
Press the A/C switch to turn the air
conditioner on. The indicator light on the
switch will illuminate w hen the fan control
dial is in any position except OFF.

Press the switch once again to turn the air
conditioner off.
NOTE
The air conditioner may not function when
the outside temperature approaches 0 °C
(32 °F).
Air intake selector
This switch controls the source of air
entering the vehicle.

Outside or recirculated air positions can be
selected. Press the switch to select outside/
recirculated air positions.
Recirculated air position (indicator light
illuminated)
Outside air is shut off. Use this position
when going through tunnels, driving in
congested traffic (high engine exhaust
areas) or when quick cooling is desired.
Outside air position (indicator light
turned off)
Outside air is allowed to enter the cabin.
Use this mode fo r ventilation or
windshield defrosting.
Interior Features
Climate Control System
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WARNING
Do not use the position in cold or rainy
weather:
Using the
position in cold or rainy
weather is dangerous as it will cause the
windows to fog up. Your vision will be
hampered, which could lead to a serious
accident.
Rear window defogger switch
Press the rear window defogger switch to
defrost the rear window.
Refer to Rear Window Defogger on page
4-56.
▼ Heating
1. Set the mode sel
ector dial to the
position.
2. Set the air intake selector to the outside
air position (indicator light turns off).
3. Set the temperature control dial to the
hot position.
4. Set the fan control dial to the desired speed.
5. If dehumidified heating is desired, turn
on the air conditioner.
NOTE
If the windshield fogs up easily, set the
mode selector dial to the
position.
If cooler air is desired at face level, set
the mode selector dial at the
position
and adjust the temperature control dial
to maintain maximum comfort.
The air to the floor is warmer than air
to the face (except wh en the temperature
control dial is set at the extreme hot or
cold position).
▼ Cooling
1. Set the mode selector dial to the
position.
2. Set the temperature control dial to the
cold position.
3. Set the fan control dial to the desired speed.
4. Turn on the air conditioner by pressing the A/C switch.
5. After cooling begins, adjust the fan control dial and temperature control
dial as needed to maintain maximum
comfort.
CAUTION
If the air conditioner is used while driving
up long hills or in heavy traffic, monitor the
high engine coolant temperature warning
indication/warning light to see if it is
illuminated or flashing (page 7-33).
The air conditioner may cause engine
overheating. If the warning light is
illuminated or flashing, turn the air
conditioner off (page 7-27).
NOTE
When maximum cooling is desired, set
the temperature control dial to the
extreme cold position and set the air
intake selector to the recirculated air
position, then turn the fan control dial
fully clockwise.
If warmer air is desired at floor level,
set the mode selector dial at the
position and adjust the temperature
control dial to maintain maximum
comfort.
Interior Features
Climate Control System
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