warning lights MAZDA MODEL 3 HATCHBACK 2018 (in English) Workshop Manual

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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SignalWarning Action to be taken
Seat Belt
Wa r n i n g 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 ignition switched
ON.
If the driver or front pa
ssenger's seat belt is un-
fastened (only when the front passenger's seat is
occupied) and the vehicle is driven at a speed
faster than about 20 km/h (12 mph), the warn-
ing light flashes. After a short time, the warning
light stops flashing, but remains illuminated.
NOTE
The warning light flashes for about 6 seconds
if the driver's seat belt is not fastened when the
ignition is switched ON.
To allow the front passeng er occupant classifi-
cation sensor to function properly, do not
place and sit on an additional seat cushion on
the front passenger's seat. The sensor may not
function properly because the additional seat
cushion could cause sensor interference.
If a small child is seated on the front passeng-
er's seat, the warning light may not operate.
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 ignition switched
ON.
If the driver or front pa ssenger's seat belt is un-
fastened (only when the front passenger's seat is
occupied) and the vehicle is driven at a speed
faster than about 20 km/h (12 mph), the warn-
ing light flashes. After a short time, the warning
light stops flashing, but remains illuminated. If
a seat belt remains unfastened, the warning light
flashes again for a given period of time.
NOTE
Placing heavy items on the front passenger's
seat may cause the front passenger's seat belt
warning function to ope rate depending on the
weight of the item.
If a small child is seated on the front passeng-
er'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
Low Washer
Fluid Level Wa r n i n g
Light
*
This warning light indicates that little washer
fluid remains. Add washer fluid (page 6-27).
Door-Ajar
Wa r n i n g Light The light turns on if a
ny door/liftgate is not
closed securely. Close the door/liftgate securely.

KEY Warning Light
Take the appropriate action and verify that the warning light t
urns off.
SignalCause Action to be taken
(Red)
(Flashing) The key battery is dead. Replace the key battery (page 6-35).
The key is not within the operation range.
Bring the key into the operation range
(page 3-7).
The key is placed in areas inside the cabin
where it is difficult for the key to be detect-
ed.
A key from another manufacturer similar to
the key is in the operation range. Take the key from another manufacturer
similar to the key out of the operation
range.
Without the ignition switched off, the key is
taken out of the cabin, and then all the
doors are closed. Bring the key back into the cabin.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
*Some models.7-35
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Message Indicated on Display*
If a message is displayed in the center display (Type B audio), take appropriate action (in a
calm manner) according to the displayed message.

(Display example)
▼ Stop Vehicle in Safe Place Immediately
If the following messages are dis
played in the center display (Type B audio), a vehicle
system may be malfunctioning. Stop the vehicle in a safe place and contact an Authorized
Mazda Dealer.
Display Indicated Condition
Displays if the engine coolant temperature has increased excess ively.
Displays if the charging system has a malfunction.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-36*Some models.
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▼Make Sure the Message
is No Longer Displayed
Displays in the following cases:
Display Indicated Condition/Action to be taken
Displays if i-ELOOP requires charging. Leave the engine idling and
wait until the message disappears.
NOTE
If the vehicle is driven while the message is displayed, the buzzer will
sound.
If you turn the steering wheel while the message is displayed, it will
feel heavier than normal, but this does not indicate an abnormality.
The steering operation will return to normal after the message has dis-
appeared.
▼ Verify Display Content
Displays in the following cases:
Display
Indicated Condition/Action to be taken
The following message is displayed when the temperature around the
center display is high.
Lowering the temperature in the cabin or the temperature around the
center display by avoiding direct sunlight is recommended.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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Warning Sound isActivated
▼Lights-On Reminder
The lights-on reminder is operable when
the time setting
*1 of the auto headlight off
function is off.
If lights are on and the ignition is switched
to ACC or off, a continuous beep sound
will be heard when t he driver's door is
opened.
*1 If the light switch is left on, the auto headlight off function automatically
turns off the lights about 30 seconds
after switching the ignition off. The
time setting can be changed.
Refer to Personalization Features on
page 9-12.
NOTE
When the ignition is switched to ACC,
the “Ignition Not Switched Off (STOP)
Warning Beep” (page 7-39) overrides
the lights-on reminder.
A personalized function is available to
change the sound volume for the
lights-on reminder.
Refer to Personalization Features on
page 9-12.
▼Air Bag/Front Seat Belt
Pretensioner System Warning Beep
If there is a problem with the air bag/seat
belt pretensioner systems and the warning
light illumination, a
warning beep sound
will be heard for about 5 seconds every
minute.

The air bag and seat belt pretensioner
system warning beep sound will continue
to be heard for approximately 35 minutes.
Have your vehicle inspected at an
Authorized Mazda Dealer as soon as
possible.
WA R N I N G
Do not drive the vehicle with the air bag/
seat belt pretensioner system warning beep
sounding:
Driving the vehicle with the air bag/seat
belt pretensioner system warning beep
sounding is dangerous. In a collision, the
air bags and the seat belt pretensioner
system will not deploy and this could result
in death or serious injury. Contact an
Authorized Mazda Dealer to have the
vehicle inspected as soon as possible.
▼ Seat Belt Warning Beep
If the driver's seat belt is not fastened
when the ignition is switched ON, a beep
sound will be heard for about 6 seconds. If
the driver or the fron
t passenger's seat belt
is not fastened and the vehicle is driven at
a speed faster than about 20 km/h (12
mph), a beep sound will be heard again for
a specified period of time.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-38
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NOTE
To allow the front passenger occupant
classification sensor to function
properly, do not place and sit on an
additional seat cushion on the front
passenger seat. The sensor may not
function properly because the additional
seat cushion could cause sensor
interference.
When a small child sits on the front
passenger seat, it is possible that the
warning beep will not operate.
▼Ignition Not Switched Off (STOP)
Warning Beep
If the driver's door is opened with the
ignition switched to
ACC, a beep will be
heard continuously in the cabin to notify
the driver that the ignition has not been
switched OFF (STOP). Under this
condition, the keyless entry system will
not operate, the vehicle cannot be locked,
and the battery voltage will be depleted.
▼ Key Removed from Vehicle Warning
Beep
Vehicles with advanc
ed keyless function
If the key is taken out of the vehicle while
the ignition is not switched OFF and all
the doors are closed, the beep which
sounds outside of the vehicle will be heard
6 times, the beep which sounds inside the
vehicle will be heard 6 times, and the
KEY warning light (red) in the instrument
cluster flashes continuously to notify the
driver that the ignition has not been
switched OFF.
Vehicles without advanced keyless
function
If the key is taken out of the vehicle while
the ignition is not switched OFF and all
the doors are closed, a beep will be heard
in the cabin 6 times and the KEY warning
light (red) in the ins trument cluster turns
on continuously to notify the driver that
the ignition has not been switched OFF.
NOTE
Because the key utilizes low-intensity
radio waves, the Key Removed From
Vehicle Warning may activate if the key is
carried together with a metal object or it
is placed in a poor si gnal reception area.
▼Request Switch Inoperable Warning
Beep (With the advanced keyless
function)
If the request switch is pressed with the
door open or ajar, or the ignition is not
switched OFF with a key being carried, a
beep will be heard outside for about 2
seconds to notify the driver that the door
or liftgate/trunk lid cannot be locked.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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