warning light MAZDA MODEL 3 HATCHBACK 2018 (in English) Manual Online

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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If a Warning Light Turns On or Flashes
If any warning light turns on/flashes, take appropriate action for each light. There is no
problem if the light turns off, h owever if the light does not turn off or turns on/flashes again,
consult an Authorized Mazda Dealer.
(Vehicles with type B audio)
The details for some warnings can be viewed on the center display.
1. If the warning light is turned on, select
icon on the home screen to display the
application screen.
2. Select “Vehicle Status Monitor”.
3. Select “Warning Guidance” to display the current warnings.
4. Select the applicable warni ng to view the warning details.
▼Stop Vehicle in Safe Place Immediately
If any of the following warning
lights turns on, the system may have a malfunction. Stop the
vehicle in a safe place immediately and contact an Authorized M azda Dealer.
SignalWarning
Brake System Warning
Light Without Electric Parking Brake (EPB)
This warning has the
following functions:
Parking brake warning/Warning light inspection
The light illuminates when the par king brake is applied with the ignition switched to
START or ON. It turns off when the parking brake is fully relea sed.
Low brake fluid level warning
If the brake warning light remains illuminated even though the parking brake is re-
leased, the brake fluid may be l ow or there could be a problem with the brake system.
Park the vehicle in a safe place immediately and contact an Aut horized Mazda Dealer.
WA R N I N G
Do not drive with the brake system warning light illuminated. Contact an Authorized
Mazda Dealer to have the brakes inspected as soon as possible:
Driving with the brake system warning light illuminated is dangerous. It indicates that
your brakes may not work at all or that they could completely fail at any time. If this
light remains illuminated, after checking that the parking brake is fully released, have
the brakes inspected immediately.
CAUTION
In addition, the effectiveness of the brakin g may diminish so you may need to depress
the brake pedal more strongly than normal to stop the vehicle.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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SignalWarning
Brake System Warning
Light With Electric Parking Brake (EPB)
This warning has the following functions:
Parking brake warning/Warning light inspection
The light illuminates when the electric parking brake (EPB) is
applied with the igni-
tion switched to START or ON. It turns off when the electric pa rking brake (EPB) is
released.
When the light turns on
If the brake system warning light remains turned on even though the electric parking
brake (EPB) is released, the brak e fluid may be low or there could be a problem with
the brake system. Park the vehicle in a safe place immediately and contact an Author-
ized Mazda Dealer.
When the light is flashing
The light flashes if the electric parking brake (EPB) has a mal function.
If the light remains flashing ev en if the electric parking brake (EPB) switch is operat-
ed, consult an Authorized Mazd a Dealer as soon as possible.
WARNING
Do not drive with the brake system warning light illuminated. Contact an Authorized
Mazda Dealer to have the brakes inspected as soon as possible:
Driving with the brake system warning light illuminated is dangerous. It indicates that
your brakes may not work at all or that they could completely fail at any time. If this
light remains illuminated, after checking that the parking brake is fully released, have
the brakes inspected immediately.
CAUTION
In addition, the effectiveness of the braking may diminish so you may need to depress
the brake pedal more strongly than normal to stop the vehicle.
Electronic Brake Force Distribution System Wa r n i n g If the electronic brake force di
stribution control unit determines that some compo-
nents are operating incorrectly , the control unit may illuminate the brake system
warning light and the ABS warni ng light simultaneously. The problem is likely to be
the electronic brake force distribution system.
WARNING
Do not drive with both the ABS warning light and brake warning light illuminated.
Have the vehicle towed to an Authorized Mazda Dealer to have the brakes inspected as
soon as possible:
Driving when the brake system warning ligh t and ABS warning light are illuminated si‐
multaneously is dangerous.
When both lights are illuminated, the rear wheels could lock more quickly in an emer‐
gency stop than under normal circumstances.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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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
Power Steering Mal-
function Indicator Light The light illuminates/flashes if the electric power steering ha
s a malfunction.
If the light illuminates/flashes, stop the vehicle in a safe pl ace and do not operate the
steering wheel. There is no problem if the light turns off afte r a while. Contact an Au-
thorized Mazda Dealer if the lig ht illuminates/flashes continuously.
NOTE
If the indicator light illuminates/flashes, the power steering will not operate normal-
ly. In this happens, the st eering wheel can still be oper ated, however, the operation
may feel heavy compar ed to normal, or the steering wheel could vibrate when turn-
ing.
Repeatedly jerking the steering wheel left and right while the vehicle is stopped or
moving extremely slowly will cause the power steering system to go into protective
mode which will make the steering feel heavy, but this does not indicate a problem. If
this occurs, park the vehicle safely and wait several minutes for the system to return
to normal.
▼ Contact Authorized Mazda Deal
er and Have Vehicle Inspected
If any of the following warning lights o r the indicator light turns on/flashes, the system may
have a malfunction. Contact an Authorized Mazda Dealer to have your vehicle inspected.
SignalWarning
ABS Warning LightIf the ABS warning light stays on while you're driving, the ABS
control unit has detected
a system malfunction. If this occurs, your brakes will function normally as if the vehicle
had no ABS.
Should this happen, consult an A uthorized Mazda Dealer as soon as possible.
NOTE
When the engine is jump-started to charge the battery, uneven rpm occurs and the ABS
warning light may illuminate. If this occurs, it is the result of the weak battery and does
not indicate an ABS malfunction.
The brake assist system does not operate while the ABS warning light is illuminated.
Master Warning
Light
(Vehicles with type B audio)
The light turns on when the system has a malfunction.
Operate the center display and verify the content.
Refer to If a Warning Light Turns On or Flashes on page 7-25.
(Vehicles without type B audio)
The light illuminates continuously if any one of the following occurs. Consult an Au-
thorized Mazda Dealer.
There is a malfunction in the battery management system.There is a malfunction in the brake switch.
Electric Parking
Brake (EPB) Warn-
ing Light
*
The warning light illuminates when the system has a malfunction . Have your vehicle in-
spected at an Authorized Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-28*Some models.
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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
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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
Blind Spot Monitor-
ing (BSM) OFF In-
dicator Light
*
A problem in the system may be in dicated under the following conditions.
Have your vehicle inspected at an Authorized Mazda Dealer.
The light does not tur n on when the ignition is switched ON.The light remains on even when the Blind Spot Monitoring (BSM) system can be operat-
ed.
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.
(Amber)
Mazda Radar Cruise
Control (MRCC)
Wa r n i n g L i g h t
*
The “Front radar sensor system m alfunction” is displayed if there is a malfunction in the
system while the Mazda Radar Crui se Control (MRCC) system is on. Have your vehicle
inspected at an Authorized Mazda Dealer.
(Turns on)
Lane-keep Assist System (LAS) & Lane Departure
Wa r n i n g S y s t e m
(LDWS) Warning
Light
*
The warning light turns on if the system has a malfunction. Hav e your vehicle inspected
at an Authorized Mazda Dealer.
CAUTION
 Always use tires for all wheels that are of the specified size, and the same manufacture,
brand, and tread pattern. In a ddition, do not use tires with
significantly
different wear
patterns on the same vehicle. If such improper tires are used, the system may not operate
normally.
 When an emergency spare tire is used, the system may not operate normally.
LED Headlight
Wa r n i n g L i g h t*
This light illuminates if there i s a malfunction in the LED hea dlight. Have your vehicle
inspected by an Authorized Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
*Some models.7-31
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▼Taking Action
Take the appropriate action and verify that the warning light t
urns off.
SignalWarning Action to be taken
(Turns on)
Tire Pressure Monitoring
System
Wa r n i n g
Light
*
When the warning light illuminates, and the
warning beep sound is heard (about 3 seconds),
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 maneuver‐
ing 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 sud‐
den maneuvering or braking. Vehicle 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 sy stem monitored again
by an Authorized Mazda Dealer or a tire repair
station.
Do not ignore the TPMS Warning Light:
Ignoring the TPMS warn ing 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 situation that
could lead to tire failure and a dangerous acci‐
dent. Inspect the tires and adjust to the specified in-
flation pressure (page 6-38).
NOTE
Perform tire pressure adjustment when the
tires are cold. Tire pressure will vary accord-
ing to the tire temperature, therefore let the ve-
hicle stand for 1 hour or only drive it 1.6 km (1
mile) or less before ad
justing the tire pres-
sures. When pressure is adjusted on hot tires to
the cold inflation pressure, the TPMS warning
light/beep may turn on af ter the tires cool and
pressure drops below specification.
Also, an illuminated TPMS warning light, re-
sulting from the tire air pressure dropping due
to cold ambient temper ature will remain illu-
minated even if the ambient temperature rises.
In this case, it will also be necessary to adjust
the tire air pressures. If the TPMS warning
light illuminates due to a drop in tire air pres-
sure, make sure to check and adjust the tire air
pressures.
Tires lose air naturally over time and the
TPMS cannot tell if the tires are getting too
soft over time or yo u have a flat. However,
when you find one low tir e in a set of four-that
is an indication of trouble; you should have
someone drive the vehicle slowly forward so
you can inspect any low tire for cuts and any
metal objects sticking through tread or side-
wall. Put a few drops of water in the valve
stem to see if it bubble s indicating a bad valve.
Leaks need to be addressed by more than sim-
ply reinflating the tire as leaks are dangerous
― take it to an Authorized Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-32*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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