2021 MAZDA MODEL CX-3 warning

SignalWarning
(Red)
(Turns on)
KEY Warning Light If any malfunction occurs in the keyless
entry system, it illuminates continuously.
CAUTION
If the key warning indicator light illuminates or the push button start indicator light (amber)
flashes, the engine may not start. If the engine cannot be started, try starting it using the
emergency operation for starting the engine, and have the vehicle inspected at an Author‐
ized Mazda Dealer as soon as possible.
Refer to Emergency Operation for Starting the Engine on page 4-9.
Security Indicator Light If the engine does not start with the correct ke
y, and the security indicator light remains
illuminated or flashing, try the following:
Make sure the key is within the operational range for signal transmission. Switch the igni‐
tion off, and then restart the en gine. If the engine does not start after 3 or more tries, con‐
tact an Authorized Mazda Dealer.
(Amber)
High Beam Control System (HBC)
Wa r n i n g L i g h t
*
The light remains turned on if there is a pr oblem with the system. Have your vehicle in ‐
spected at an Authorized Mazda Dealer.
NOTE
If the Forward Sensing Camera (FSC) field of view is impaired during bad weather condi ‐
tions (such as rain, fog, and snow) and when the windshield is dirty, the warning indica‐
tion/warning light for the High Beam Contro l System (HBC) may display/turn on. Howev‐
er, this does not indicate a problem.
(Turns on)
Lane Departure
Wa r n i n g S y s t e m
(LDWS) Warning
Light
*
The warning light remains turn ed on if there is a problem with the system. Have your
vehicle inspected at an Authorized Mazda Dealer.
The LDWS does not operate when the warning light illuminates.
CAUTION
A problem in the system may be indicated un der the following conditions. Have your ve‐
hicle inspected at an Authorized Mazda Dealer.
 When the light remains turned on while driving the vehicle.
When the system is canceled automatically, the light turns on. Normally, the system
restores automatically and the light turns off , however, if the light remains turned on,
there may be a problem with the system.
 The light does not illuminate when the ignition is switched ON.
 Always use tires for all wheels that are of the
specified size, and the same manufacture,
brand, and tread pattern. In addition, do no t use tires with significantly different wear
patterns on the same vehicle. If such improper tires are used, the LDWS may not operate
normally.
 When an emergency spare tire is used, the system may not operate normally.
NOTE
If the windshield area in fr ont of the Forward Sensing Camera (FSC) is fogged or ob ‐
structed, the light turns on temporarily. If the light remains turned on, there may be a
problem with the system.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-32*Some models.
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SignalWarning
(Amber)
Mazda Radar Cruise Control with Stop & Go function
(MRCC with Stop & Go function)
Warning Light
*
The warning light turns on if there is a malf unction in the system while the Mazda Radar
Cruise Control with Stop & Go function (MRCC with Stop & Go function) system is on.
Have your vehicle inspected at an Authorized Mazda Dealer.
Blind Spot Monitor ‐
ing (BSM) OFF In ‐
dicator Light
*
A problem in the system may be indicated under the following conditions.
Have your vehicle inspected at an Authorized Mazda Dealer.
The light does not turn on when the ignition is switched ON.The light remains on even wh en the Blind Spot Monitoring (BSM) system can be oper ‐
ated.
The light turns on while driving the vehicle.
NOTE
If the vehicle is driven on a road with less traffic and few vehicles that the radar sensors
can detect, the system may pause (The Blin d Spot Monitoring (BSM) OFF indicator light
in the instrument cluster illuminates). However, it does not indicate a malfunction.
LED Headlight
Warning Light*
This light illuminates if ther e is a malfunction in the LED headlight. Have your vehicle
inspected by an Authorized Mazda Dealer.
▼ Taking Action
Take the appropriate action and verify that the warning light turns off.
Signal
Warning Action to be taken
Low Fuel Warning
Light The light turns on wh
en the remaining fuel
is about 9.0 L (2.3 US gal, 1.9 Imp gal).
NOTE
The light illumination timing may vary be‐
cause fuel inside the fuel tank moves around
according to the driving conditions and the
vehicle posture. Add fuel.
Check Fuel Cap Warn
‐
ing Light If the check fuel cap warning light illumi‐
nates while driving, the fuel-filler cap may
not be installed properly.
Stop the engine and re
install the fuel-filler
cap.
Refer to Refueling on page 3-26.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
*Some models.7-33
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SignalWarning Action to be taken
Seat Belt Warning
Light Except Mexico
The seat belt warning light turns on if the
driver or front passenger's seat is occupied
and the seat belt is not fastened with the ig
‐
nition switched ON.
If the driver or front passenger's seat belt is
unfastened (only when the front passenger's
seat is occupied) and th e vehicle is driven at
a speed faster than about 20 km/h (12 mph),
the warning light flashes. After a short time,
the warning light stops flashing, but re ‐
mains illuminated.
NOTE
The warning light flashes for about 6
seconds if the driver's seat belt is not fas ‐
tened when the ignition is switched ON.
To allow the front passenger occupant
classification sensor to function properly,
do not place and s it on an additional seat
cushion on the front passenger's seat.
The sensor may not function properly be ‐
cause the additional seat cushion could
cause sensor interference.
If a small child is seated on the front pas ‐
senger's seat, the warning light may not
operate. Fasten the seat belts.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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SignalWarning Action to be taken
Seat Belt Warning
Light Mexico
The seat belt warning lig
ht turns on if the
driver or front passenger's seat is occupied
and the seat belt is not fastened with the ig ‐
nition switched ON.
If the driver or front passenger's seat belt is
unfastened (only when the front passenger's
seat is occupied) and the vehicle is driven at
a speed faster than ab out 20 km/h (12 mph),
the warning light flashes. After a short time,
the warning light stops flashing, but re ‐
mains illuminated. If a seat belt remains un ‐
fastened, the warning light flashes again for
a given period of time.
NOTE
Placing heavy items on the front pas ‐
senger's seat may cause the front pas ‐
senger's seat belt warning function to op ‐
erate depending on the weight of the
item.
To allow the front passenger seat weight
sensor to function properly, do not place
and sit on an additio nal seat cushion on
the front passenger's seat. The sensor
may not function prop erly because the
additional seat cushion could cause sen ‐
sor interference.
If a small child is seated on the front pas ‐
senger's seat, the warning light may not
operate. Fasten the seat belts.
Door-Ajar Warning
Light The light turns on if any door/liftgate is not
closed securely.
Close the door/liftgate securely.
Low Washer Fluid
Level Warning Light*
This warning light indicates that little wash ‐
er fluid remains. Add washer fluid (page 6-27).
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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SignalWarning Action to be taken
(Amber)
Smart Brake Support/
Smart City Brake Sup ‐
port (SBS/SCBS)
Warning Light
*
The light turns on if the windshield or the
radar sensor are dirty, or there is a malfunc ‐
tion in the system. (Vehicles with type B audio)
Verify the reason why the warning light is
illuminated on the center display (page
7-26).
If the reason why th
e warning light is illu ‐
minated is due to a dirty windshield, clean
the windshield.
If the warning light is illuminated because
of a dirty radar sensor, clean the front em ‐
blem.
For any other reasons, have the vehicle in ‐
spected at an Authorized Mazda Dealer.
(Vehicles without type B audio)
If the reason why th e warning light is illu ‐
minated is due to a dirty windshield, clean
the windshield. For any other reasons,
have the vehicle inspected at an Author ‐
ized Mazda Dealer.

Tire Pressure Monitoring System Warning Light (Turns on)
*
Take the appropriate action and verify that the warning light turns off.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-36*Some models.
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Wa r n i n g
When the warning light illuminates, an d the warning beep sound is heard when tire pressure is too low in one or
more tires.
WA R N I N G
If the tire pressure monitoring system warning light illuminates or flashes, or the tire pressure warning beep sound
is heard, decrease vehicle speed immediately and avoid sudden maneuvering and braking:
If the tire pressure monitoring system warning light illuminates or flashes, or the tire pressure warning beep sound
is heard, it is dangerous to drive the vehicle at high speeds, or perform sudden maneuvering or braking. Vehicle
drivability could worsen an d result in an accident.
To determine if you have a slow leak or a flat, pull over to a safe position where you can check the visual condition
of the tire and determine if you have enough air to proceed to a place where air may be added and the system
monitored again by an Authorized Mazda Dealer or a tire repair station.
Do not ignore the TPMS Warning Light:
Ignoring the TPMS warning light is da ngerous, even if you know why it is illuminated. Have the problem taken
care of as soon as possible before it develops into a more serious situation that could lead to tire failure and a
dangerous accident.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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Action to be taken
Inspect the tires and adjust to the specified inflation pressure (page 6-36).
CAUTION
When replacing/repairing the tires or wheels or both, have the work done by an Authorized Mazda Dealer, or the
tire pressure sens ors may be damaged.
NOTE
Perform tire pressure adjustment when the tires are cold . Tire pressure will vary according to the tire temper‐
ature, therefore let the vehicle stand for 1 hour or on ly drive it 1.6 km (1 mile) or less before adjusting the
tire pressures. When pressure is adjusted on hot tires to the cold inflation pressure, the TPMS warning light/
beep may turn on after the tires cool and pressure drops below specification.
Also, an illuminated TPMS warning light, resulting from th e tire air pressure dropping due to cold ambient
temperature, may turn off if the ambient temperature rises. In this case, it will also be necessary to adjust the
tire air pressures. If the TPMS warnin g light illuminates due to a drop in tire air pressure, make sure to check
and adjust the tire air pressures.
After adjusting the tire air pressures, it may require some time for the TPMS warning light to turn off. If the
TPMS warning light remains illuminated, drive the vehicle at a speed of at least 25 km/h (16 mph) for 10
minutes, and then verify that it turns off.
Tires lose air naturally over time and the TPMS cannot tell if the tires are getting too soft over time or you
have a flat. However, when you find one low tire in a set of four-that is an indication of trouble; you should
have someone drive the vehicle slowly forward so you ca n inspect any low tire for cuts and any metal objects
sticking through tread or sidewall. Pu t a few drops of water in the valve stem to see if it bubbles indicating a
bad valve. Leaks need to be addressed by more than simply refilling the trouble tire as leaks are dangerous
― take it to an Authorized Mazda Dealer which has all the equipmen t to fix tires, TPMS systems and order
the best replacement tire for your vehicle.
If the warning light illuminates again even after the tire pressures are adjusted, there may be a tire puncture.

If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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KEY Warning Light
Take the appropriate action and verify that the warning light turns off.
SignalCause Action to be taken
(Red)
(Flashing) The advanced key battery is dead. Replace the key battery (page 6-34).
The advanced key is
not within the opera‐
tion range. Bring the advanced key into the operation
range (page 3-8).
The advanced key is placed in areas inside
the cabin where it is difficult for the key to
be detected.
A key from another manufacturer similar to
the advanced key is in the operation range. Take the key from another manufacturer
similar to the advanced key out of the op
‐
eration range.
Without the ignition switched off, the ad ‐
vanced key is taken out of the cabin, and
then all the doors are closed. Bring the advanced ke
y back into the cab‐
in.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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