2018 MAZDA MODEL 3 HATCHBACK check engine

*4 Check the tire repair fluid expiration date every year when performing the periodic maintenance. Replace the
tire repair fluid bottle with ne w one before the expiration dat e.
(Cont.)
Maintenance Interval Number of months or kilometers, whichever comes first
Months 39 42 45 48 51 54 57 60 63 66 69 72
×1000 km 65707580859095100105110115120
ENGINE
Drive belts II
Engine oil & filter RRRRRRRRRRRR
COOLING SYSTEM
Cooling system II
Engine coolant
*1Replace at first 200,000 km or 10 years; after that, every 100,000 km or 5 years
Engine coolant level IIIIIIIIIIII
FUEL SYSTEM
Air filter CRCRCR
Fuel lines and hoses I
*2I
Hoses and tubes for emission I
*2I
Fuel filter Replace every 60,000 km
IGNITION SYSTEM
Spark plugs IIIIII
Replace every 120,000 km
ELECTRICAL SYSTEM
Function of all lights IIIIIIIIIIII
CHASSIS and BODY
Brake lines, hoses and connections II I
Brake and clutch fluid level II I I
Brake fluid RR
Disc brakes IIIIII
Tire (Rotation)
*3Rotate every 10,000 km
Tire inflation pressure and tire wear
*3IIIIII
Steering operation and linkages IIIIII
Front and rear suspensi on, ball joints and wheel
bearing axial play III
Driveshaft dust boots I I I
Bolts and nuts on chassis and body T T T
Exhaust system and heat shields I I I
All locks and hinges LLLLLL
Maintenance and Care
Scheduled Maintenance
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Maintenance IntervalNumber of months or kilometers, whichever comes first
Months 39 42 45 48 51 54 57 60 63 66 69 72
×1000 km 65 70 75 80 85 90 95 100 105 110 115 120
Washer fluid level IIIIII
Emergency flat tire repair kit (if installed)
*4Inspect annually.
AIR CONDITIONER SYSTEM
Cabin air filter RRR
Chart symbols:
I: Inspect: Inspect and clean, re pair, adjust, fill up, or replac e if necessary.
R: Replace
L: Lubricate
C: Clean
T: Tighten
Remarks:
*1 Use of FL-22 is recommended wh en replacing engine coolant. Using engine coolant other than FL-22 may
cause serious damage to the engine and cooling system.
*2 According to state/provincial and federal regulations, failure to perform maintenance on these items will not void your emissions warranties. However, Mazda recommends that all maintenance services be performed at
the recommended time or kilomete r period to ensure long-term reliability.
*3 The Tire Pressure Monitoring Sy stem (TPMS) initialization must be performed so that the system operates
normally (if equipped).
*4 Check the tire repair fluid exp iration date every year when performing the periodic maintenance. Replace the
tire repair fluid bottle with new one before the expiration date.
Maintenance and Care
Scheduled Maintenance
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WA R N I N G
Do not perform maintenance work if you lack sufficient knowledge and experience or the
proper tools and equipment to do the work. Have maintenance work done by a qualified
technician:
Performing maintenance work on a vehicle is dangerous if not done properly. You can be
seriously injured while performing some maintenance procedures.
If you must run the engine while working under the hood, make certain that you remove all
jewelry (especially rings, bracelets, watches, and necklaces) and all neckties, scarves, and
similar loose clothing before getting near the engine or cooling fan which may turn on
unexpectedly:
Working under the hood with the engine running is dangerous. It becomes even more
dangerous when you wear jewelry or loose clothing.
Either can become entangled in moving parts and result in injury.
Pull over to a safe location, then switch the ignition off and make sure the fan is not
running before attempting to work near the cooling fan:
Working near the cooling fan when it is running is dangerous. The fan could continue running
indefinitely even if the engine has stopped and the engine compartment temperature is high.
You could be hit by the fan and seriously injured.
Do not leave items in the engine compartment:
After you have finished checking or doing servicing in the engine compartment, do not forget
and leave items such as tools or rags in the engine compartment.
Tools or other items left in the engine compartment could cause engine damage or a fire
leading to an unexpected accident.
Maintenance and Care
Owner Maintenance
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Overheating
If the high engine coolant temperature
warning light turns on, the vehicle loses
power, or you hear a loud knocking or
pinging noise, the engine is probably too
hot.
WA R N I N G
Pull over to a safe location, then switch
the ignition off and make sure the fan is not
running before attempting to work near
the cooling fan:
Working near the cooling fan when it is
running is dangerous. The fan could
continue running indefinitely even if the
engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either cooling
system cap when the engine and radiator
are hot:
When the engine and radiator are hot,
scalding coolant and steam may shoot out
under pressure and cause serious injury.
Open the hood ONLY after steam is no
longer escaping from the engine:
Steam from an overheated engine is
dangerous. The escaping steam could
seriously burn you.
If the high engine coolant temperature
warning light turns on:

1. Drive safely to the side of the road and
park off the right-of-way.
2. Put a vehicle with an automatic transaxle in park (P), a manual
transaxle in neutral.
3. Apply the parking brake.
4. Turn off the air conditioner.
5. Check whether coolant or steam is
escaping from the engine
compartment.

If steam is coming from the engine
compartment:
Do not go near the front of the vehicle.
Stop the engine.
Wait until the steam dissipates, then
open the hood and start the engine.

If neither coolant nor steam is
escaping:
Open the hood and idle the engine
until it cools.
CAUTION
If the cooling fan does not operate
while the engine is running, the engine
temperature will increase. Stop the
engine and call an Authorized Mazda
Dealer.
6. Make sure the cooling fan is operating, then turn off the engine after the
temperature has decreased.
7. When cool, check the coolant level. If it is low, look for coolant leaks from
the radiator and hoses.

If Trouble Arises
Overheating
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SignalWarning
Charging System Warn-
ing Light If the warning light illuminates
while driving, it indicates a malfunction of the alter-
nator or of the charging system.
Drive to the side of the road and park off the right-of-way. Co nsult an Authorized
Mazda Dealer.CAUTION
Do not continue driving when the charging system warning light is illuminated be‐
cause the engine could stop unexpectedly.
Engine Oil Warning Light This warning light indicates
low engine oil pressure.
CAUTION
Do not run the engine if the oil pressure is low. Otherwise, it could result in extensive
engine damage.
If the light illuminates or the warning indication is displayed while driving:
1. Drive to the side of the road and park off the right-of-way o n level ground.
2. Turn off the engine and wait 5 minutes for the oil to drain back into the oil pan.
3. Inspect the engine oil level (page 6-24). If it's low, add th e appropriate amount of
engine oil while being careful not to overfill.
CAUTION
Do not run the engine if the oil level is low. Otherwise, it could result in extensive
engine damage.
4. Start the engine and check the warning light.

If the light remains illuminated even though the oil level is normal or after adding oil,
stop the engine immediately and have your vehicle towed to an Authorized Mazda
Dealer.
(Red)
High Engine Coolant
Temperature Warning Light The light flashes when the engine coolant temperature is extrem
ely high, and illumi-
nates when the engine coolant temperature increases further.
Handling Procedure
Flashing light
Drive slowly to reduce engine l oad until you can find a safe place to stop the vehicle
and wait for the engine to cool down.
Illuminated light
This indicates the possibility of overheating. Park the vehicle in a safe place immedi-
ately and stop the engine.
Refer to Overheating on page 7-20.
CAUTION
Do not drive the vehicle with the high engi ne coolant temperature warning light illumi‐
nated. Otherwise, it could result in damage to the engine.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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SignalWarning
Check Engine LightIf this light illuminates while driving, the vehicle may have a
problem. It is important to
note the driving cond itions when the light illuminated and consult an Authorized Mazda
Dealer.
The check engine light may illumi nate 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 continuousl y, do not drive at high speeds
and consult an Authorized Mazd a Dealer as soon as possible.
Automatic Trans-
axle Warning Light*
The indication/light illuminates when the transaxle has a problem.
CAUTION
If the automatic transaxle warning indication/ light illuminates, the transaxle has an electri‐
cal problem. Continuing to drive your Mazda in this condition could cause damage to your
transaxle. 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 brake assist system
may have a malfunction and
they may not operate correctly. Take your vehicle to an Authori zed Mazda Dealer.
Air Bag/Seat Belt
Pretensioner System Wa r n i n g L i g h t A system malfunction is
indicated if the warning light constantly flashes, constantly illu-
minates or does not illuminate a t all when the ignition is switched ON. If any of these
occur, consult an Authorized Mazd a Dealer as soon as possible. The system may not oper-
ate in an accident.WARNING
Never tamper with the air bag/pretensioner systems and always have an Authorized Mazda
Dealer perform all servicing and repairs:
Self-servicing or tampering with the systems is dangerous. An air bag/pretensioner could
accidentally activate or become disabled causing serious injury or death.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
*Some models.7-29
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SignalWarning
(Flashing)
Tire Pressure Moni-
toring System Warn-
ing Light
*
If the tire pressure m onitoring system has a malfunction, the t ire pressure warning light
flashes for about 1 minute when the ignition is switched ON and then continues illuminat-
ing. Have your vehicle checked by an Authorized Mazda Dealer as soon as possible.
WARNING
If the tire pressure monitoring system warning light illuminates or flashes, or the tire pres‐
sure 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 pres‐
sure warning beep sound is heard, it is dangerous to drive the vehicle at high speeds, or
perform sudden maneuvering or braking. Vehicl e drivability could worsen and 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 dangerous, 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 situa‐
tion that could lead to tire failure and a dangerous accident.
(Red)
(Turns on)
KEY Warning Light If any malfunction occurs in the keyless entry system, it illum
inates continuously.
CAUTION
If the key warning indicator light illuminates or the push button start indicator light (am‐
ber) flashes, the engine may not start. If the en gine cannot be started, try starting it using
the emergency operation for starting the engine , and have the vehicle inspected at an Au‐
thorized Mazda Dealer as soon as possible.
Refer to Emergency Operation for Starting the Engine on page 4- 10.
Security Indicator
Light If the engine does not start with the correct key, and the secu
rity 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 e ngine. If the engine does not s tart 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 th ere is a problem with the system. Have your vehicle in-
spected at an Authorized Mazda Dealer.
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
7-30*Some models.
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SignalWarning Action to be taken
Smart Brake
Support/
Smart City
Brake Sup- port (SBS/
SCBS)Smart City Brake Support(SCBS)
Wa r n i n g
Light
*
The light turns on if the windshield or the radar
sensor are dirty, or there is a malfunction in the
system. The light turns on if the windshield is
dirty or there is a ma lfunction in the system. Verify the reason why the warning light is illu-
minated on the center display.
If the reason why the warning light is illuminat-
ed is due to a dirty windshield, clean the wind-
shield.
If the warning light is illuminated because of a
dirty radar sensor, cl
ean the front emblem.
For any other reasons, have the vehicle inspect-
ed at an Authorized Mazda Dealer.
Low Fuel Wa r n i n g Light The light turns on when the remaining fuel is
about 9.0 L (2.3 US gal, 1.9 Imp gal).NOTE
The light illumination tim
ing may vary because
fuel inside the fuel tank moves around accord-
ing to the driving conditions and the vehicle
posture. Add fuel.
Check Fuel
Cap Warning Light If the check fuel cap warning light illuminates
while driving, the fuel-f
iller cap may not be in-
stalled properly. Stop the engine and reinst
all the fuel-filler cap.
Refer to Fuel-Filler Cap on page 3-29
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
*Some models.7-33
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