2021 MAZDA MODEL CX-3 ECU

SignalWarning
(Red)
Brake Pedal Opera ‐
tion Demand Warn ‐
ing Light When only flashing
Flashes if there is the possibility of the vehi
cle not being held in the stopped position by
the AUTOHOLD function, such as on steep slopes. Depress and hold your foot on the
brake pedal.
When flashing and beep sound is activated at the same time
The warning light flashes and the beep sound is activated for about five seconds if there is
a problem with the system. If the warning light flashes and the warning sound is activated,
immediately depress the brake pedal and st op using the AUTOHOLD function then con ‐
tact an Authorized Mazda Dealer.
WARNING
Immediately depress the brake pedal if the warning light flashes and the beep sound is acti‐
vated while using the AUTOHOLD function:
Because the AUTOHOLD function is canceled forcibly, the vehicle may move unexpectedly
and result in an accident.
Check Engine Light If this light illuminates while driving, the ve
hicle may have a problem. It is important to
note the driving conditions wh en the light illuminated and consult an Authorized Mazda
Dealer.
The check engine light may illu minate in the following cases:
The fuel tank level being very low or approaching empty.The engine's electrical system has a problem.The emission control system has a problem.The fuel-filler cap is missing or not tightened securely.
If the check engine light remains on, or it flashes continuously , do not drive at high
speeds and consult an Authorized M azda Dealer as soon as possible.
Automatic Trans‐
axle Warning Light*
The light illuminates when the transaxle has a problem.
CAUTION
If the automatic transaxle warning light illuminates, the transaxle has an electrical prob‐
lem. Continuing to drive your Mazda in this condition could cause damage to your trans‐
axle. Consult an Authorized Mazda Dealer as soon as possible.
(Turns on)
TCS/DSC Indicator Light If the light stays on, the TCS, DSC or the brak
e assist system may have a malfunction and
they may not operate correctly . Take your vehicle to an Authorized Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-30*Some models.
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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 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
*Some models.7-35
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Index
Key battery replacement..............6-34
Opening the Hood....................... 6-19
Owner Maintenance
Precautions...................................6-17
P
Parking Brake....................................4-55
Personalization Features..................... 9-9
Power Steering.................................. 4-74
Power steering warning buzzer......... 7-44
Power Windows............. ................... 3-30
R
Radar Sensors (Rear)...................... 4-134
Radar Sensor (Front).......................4-131
Rearview Mirror........ ........................3-29
Rear Coat Hooks............................. 5-150
Rear Cross Traffic Alert (RCTA).... 4-101
Rear Door Child Safe ty Locks.......... 3-19
Rear Seat........................................... 2-14
Rear View Monitor......................... 4-144 Displayable range on the
screen......................................... 4-146
Picture quality adju stment......... 4-150
Rear view monitor operation..... 4-147
Rear view parking camera
location...................................... 4-145
Switching to the rear view monitor
display........................................4-145
Variance between actual road
conditions and displayed
Image......................................... 4-149
Viewing the display................... 4-147
Rear Window Defogger .................... 4-52
Rear Window Washer....................... 4-51
Rear Window Wiper.... ..................... 4-51
Recommended Oil.............................6-22
Recording of Vehicle Data................ 8-22
Recreational Towing......................... 3-47
Registering Your Vehicle in A Foreign
Country.............................................. 8-18
Replacement Fuse..............................................6-47
Key battery.................................. 6-34
Light Bulbs.................................. 6-40
Tires............................................. 6-38
Wheel........................................... 6-39
Wiper........................................... 6-29
Request switch inoperable warning beep
(With the advanced keyless
function)............................................ 7-44
Rocking the Vehicle.......................... 3-42
S
Safety Defects, Reporting................. 8-14
Saving Fuel and Protection of the
Environment...................................... 3-40
Scheduled Maintenance...................... 6-4
Seats.................................................... 2-5
Driver's seat................................... 2-5
Driving position memory............ 2-10
Front passenger's seat.................. 2-13
Front seat....................................... 2-5
Head restraint.............................. 2-17
Rear seat...................................... 2-14
Seat warmer................................. 2-19
Seat Belt System Automatic locking....................... 2-23
Emergency locking...................... 2-23
Extender....................................... 2-28
Pregnant women.......................... 2-22
Seat belt precautions................... 2-21
Seat belt warning beep...................... 7-42
Security System Immobilizer system..................... 3-36
Theft-deterrent system................. 3-38
Smart Brake Support (SBS)............ 4-123 Collision warning...................... 4-125
10-7
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