fuel MAZDA MODEL 3 HATCHBACK 2020 (in English) Service Manual

Tires
▼Tires
For reasons of proper
performance, safety,
and better fuel economy, always maintain
recommended tire inflation pressures and
stay within the recommended load limits
and weight distribution.
WA R N I N G
Using Different Tire Types:
Driving your vehicle with different types of
tires is dangerous. It could cause poor
handling and poor braking; leading to loss
of control.
Except for the limited use of the temporary
spare tire, use only the same type tires
(radial, bias-belted, bias-type) on all four
wheels.
Using Wrong-Sized Tires:
Using any other tire size than what is
specified for the vehicle (page 9-9) is
dangerous. It could seriously affect ride,
handling, ground clearance, tire clearance,
and speedometer calibration. This could
cause you to have an accident. Use only
tires that are the correct size specified for
the vehicle.
▼ Tire Inflation Pressure
WA R N I N G
Always
inflate the tires to the correct
pressure:
Overinflation or
underinflation of tires is
dangerous. Adverse handling or
unexpected tire failure could result in a
serious accident.
Refer to Tires on page 9-9.
Use only a Mazda-genuine tire valve cap:
Use of a non-genuine part is dangerous as
the correct tire air pressure cannot be
maintained if the tire valve becomes
damaged. If the vehicle is driven under this
condition, the tire air pressure will decrease
which could result in a serious accident. Do
not use any part for the tire valve cap that
is not a Mazda-genuine part.
Inspect all tire pressures monthly
(including the spare) when the tires are
cold. Maintain recommended pressures for
the best ride, handling, and minimum tire
wear.
Refer to the specification charts (page
9-9).
NOTE
Always check tire pressure when tires
are cold.
Warm tires normally exceed
recommended pressures. Do not release
air from warm tires to adjust the
pressure.
Maintenance and Care
Owner Maintenance
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Underinflation can cause reduced fuel
economy, uneven and accelerated tire
wear, and poor sealing of the tire bead,
which will deform the wheel and cause
separation of tire from rim.
Overinflation can produce a harsh ride,
uneven and accelerated tire wear, and a
greater possibility of damage from road
hazards.
Keep your tire pressure at the correct
levels. If one frequently needs inflating,
have it inspected.
▼Tire Rotation
WA R N I N G
Rotate tires periodically:
Irregular tire wear is dangerous. To
equalize tread wear for maintaining good
performance in handling and braking,
rotate the tires periodically or sooner if
irregular wear develops.
Please refer to Scheduled maintenance for
your tire rotation interval.
During rotation, inspect them for correct
balance.

1. Forward
Do not include (TEMPORARY USE
ONLY) spare tire in rotation.

Also, inspect them for uneven wear and
damage. Abnormal wear is usually caused
by one or a combination of the following:
Incorrect tire pressure
Improper wheel alignment
Out-of-balance wheel
Severe braking

After rotation, inflate all tire pressures to
specification (page 9- 9) and inspect the
lug nuts for tightness.
CAUTION
Rotate unidirectional tires and radial tires
that have an asymmetrical tread pattern or
studs only from front to rear, not from side
to side. Tire performance will be reduced if
rotated from side to side.
Maintenance and Care
Owner Maintenance
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No.FUSE RAT‐
ING PROTECTED COMPONENT
F7 15 A
―
20 A Fuel pump
F8 15 A Engine control system
F9 15 A
Transmission control system
*
F10 15 A Engine control system
F11 7.5 A Air conditioner
F12 15 A Engine control system
F13 15 A ―
F14 20 A
Front seat warmer
*
F15 20 A ―
F16 15 A For protection of various circuits
F17 ― ―
F18 15 A Accessory sockets
F19 60 A Power steering system
F20 15 A Headlight (LH) 1
F21 15 A Headlight (RH) 1
F22 15 A For protection of various circuits
F23 30 A ABS, Dynamic st ability control system
F24 15 A Headlight (LH) 2
F25 15 A Headlight (RH) 2
F26 7.5 A On board diagnostics
F27 25 A For protection of various circuits
F28 25 A For protection of various circuits
F29 15 A Windscreen washer
F30 15 A Accessory sockets
F31 15 A Horn
F32 ― ―
F33 ― ―
F34 ― ―
F35 50A ABS, Dynamic stability control system
F36 ― ―
F37 40 A Rear window defogger
F38 50 A For protection of various circuits
F39 ― ―
F40 40 A Air conditioner
Maintenance and Care
Owner Maintenance
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Keep hands and scrapers clear of the
windshield when the wiper lever is in the
AUTO position and the ignition is
switched ON as fingers could be pinched
or the wipers and wiper blades damaged
when the wipers activate automatically.
If you are going to clean the windshield,
be sure the wipers are turned off
completely (when it is most likely that the
engine is left running) this is particularly
important when clearing ice and snow.
 Do not spray water in the engine
compartment. Otherwise, it could result
in engine-starting problems or damage
to electrical parts.
 When washing and waxing the vehicle,
be careful not to apply excessive force to
any single area of the vehicle roof or the
antenna. Otherwise, you could dent the
vehicle or damage the antenna.
 Make sure that the fuel-filler lid is closed
and lock the doors. Otherwise, the
fuel-filler lid may be forcefully opened by
water pressure causing damage to the
vehicle or fuel-filler lid.
To help protect the finish from rust and
deterioration, wash your Mazda
thoroughly and frequently, at least once a
month, with lukewarm or cold water.

If the vehicle is washed improperly, the
paint surface could be scratched. Here are
some examples of how scratching could
occur.

Scratches occur on the paint surface when:
The vehicle is washed without first
rinsing off dirt and other foreign matter.
The vehicle is washed with a rough, dry,
or dirty cloth.
The vehicle is washed at a car wash that
uses brushes that are dirty or too stiff.
Cleansers or wax containing abrasives
are used.
NOTE
Mazda is not responsible for scratches
caused by automatic car washes or
improper washing.
Scratches are more noticeable on
vehicles with darker paint finishes.
To minimize scratche s on the vehicle's
paint finish:
Rinse off any dirt or other foreign matter
using lukewarm or cold water before
washing.
Use plenty of lukewarm or cold water
and a soft cloth when washing the
vehicle. Do not use a nylon cloth.
Rub gently when washing or drying the
vehicle.
Take your vehicle only to a car wash
that keeps its brush es well maintained.
Do not use abrasive cleansers or wax
that contain abrasives.
CAUTION
Do not use steel wool, abrasive cleaners,
or strong detergents containing highly
alkaline or caustic agents on
chrome-plated or anodized aluminum
parts. This may damage the protective
coating; also, cleaners and detergents
may discolor or deteriorate the paint.
Maintenance and Care
Appearance Care
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▼Repairing Damage to the Finish
Deep scratches or chips on the finish
should be repaired promptly. Exposed
metal quickly rusts and can lead to major
repairs.
CAUTION
If your Mazda is da
maged and needs metal
parts repaired or replaced, make sure the
body shop applies anti -corrosion materials
to all parts, both repaired and new. This
will prevent them from rusting.
▼ Bright-Metal Maintenance
Use tar remover to remove road tar and
insects. Never do this with a knife or
similar tool.
To prevent corrosi
on on bright-metal
surfaces, apply wax or chrome
preservative and rub it to a high luster.
During cold weather o r in coastal areas,
cover bright-metal parts with a coating
of wax or preservative heavier than
usual. It would also help to coat them
with noncorrosive petroleum jelly or
some other protective compound.
CAUTION
Do not use steel wool, abrasive cleaners, or
strong detergents containing highly
alkaline or caustic agents on
chrome-plated or anodized aluminum
parts. This may result in damage to the
protective coating and cause discoloration
or paint deterioration.
▼ Underbody Maintenance
Road chemicals and salt used for ice and
snow removal and solvents used for dust
control may collect on the underbody. If
not removed, they will speed up rusting
and deterioration of
such underbody parts
as fuel lines, frame, floor pan, and exhaust
system, even though these parts may be
coated with anti-corrosive material.

Thoroughly flush the underbody and
wheel housings with lukewarm or cold
water at the end of each winter. Try also to
do this every month.

Pay special attention to these areas
because they easily hide mud and dirt. It
will do more harm than good to wet
down the road grime without removing
it.

The lower edges of doors, rocker panels,
and frame members have drain holes that
should not be clogged. Water trapped there
will cause rusting.
WA R N I N G
Dry off brakes that have become wet by
driving slowly, releasing the accelerator
pedal and lightly applying the brakes
several times until the brake performance
returns to normal:
Driving with wet brakes is dangerous.
Increased stopping distance or the vehicle
pulling to one side when braking could
result in a serious accident. Light braking
will indicate whether the brakes have been
affected.
Maintenance and Care
Appearance Care
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Starting a Flooded Engine
▼Starting a Flooded Engine
If the engine fails to start, it may be
flooded (excessive fuel in the engine).

Follow this procedure:

1. If the engine does not start within 5
seconds on the first try, wait 10
seconds and try again.
2. Make sure the parking brake is on.
3. Depress the accelerator all the way and hold it there.
4. Depress the clutch pedal (manual
transmission) or the brake pedal
(automatic transmission), then press
the push button start. If the engine
starts, release the accelerator
immediately because the engine will
suddenly rev up.
5. If the engine fails to start, crank it
without depressing the accelerator.

If the engine still does not start using the
previous procedure, have your vehicle
inspected by an Authorized Mazda Dealer.
Push-Starting
▼ Push-Starting
Do not push-start your Mazda.
WA R N I N G
Never tow a vehicle to start it:
Towing a vehicle to start it is dangerous.
The vehicle being towed could surge
forward when its engine starts, causing the
2 vehicles to collide. The occupants could
be injured.
CAUTION
Do not push-start a vehicle that has a
manual transmission. It can damage the
emission control system.
NOTE
You cannot start a vehicle with an
automatic transmission by pushing it.
If Trouble Arises
Emergency Starting
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When the light is flashing
The light flashes if the Electric Parking
Brake (EPB) has a malfunction. If the light
remains flashing even if the Electric
Parking Brake (EPB) switch is operated,
consult an Authorized Mazda Dealer as
soon as possible.
▼Brake Override Warning Indication
This message is displayed when the
accelerator pedal and brake pedal are
depressed at the same time while driving.
Release the accelerator pedal and depress
the brake pedal.
▼Check Engine Indication/Light
If this light illuminates while driving, the
vehicle may have a problem. It is
important to note the driving conditions
when the light illuminated and consult an
Authorized Mazda Dealer.
The check engine light may illuminate in
the following cases:
The engine's electrical system has a
problem.
The emission control system has a
problem.
The fuel tank level being very low or
approaching empty.
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 Mazda
Dealer as soon as possible.
WA R N I N G
If the check engine light turns on, do not
disconnect the battery cables.
If the battery cables are disconnected and
then reconnected, the engine could be
damaged and catch on
fire.
▼Automatic Transmission Warning
Indication/Warning Light*
The indication/light illuminates when the
transmission has a problem.
CAUTION
If the automatic transmission warning
indication/light illuminates, the
transmission has an electrical problem.
Continuing to drive your Mazda in this
condition could cause damage to your
transmission. Consult an Authorized
Mazda Dealer as soon as possible.
▼AWD Warning Indication/Warning
Light*
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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“Key Not Detected” is displayed
If the presence of the key cannot be
detected (dead battery, battery
malfunction, no key), it is displayed
when the driver attempts to start the
engine (push button start operation,
brake pedal depression).
Displayed when it is determined that a
key that was in the vehicle has been
removed from the vehicle. (Key taken
out warning. Other than IG-OFF)
▼ High Beam Control System (HBC)
Warning Indication/Warning Light
(Amber)
*
The light remains turned on if there is a
problem with the system. Have your
vehicle inspected at an Authorized Mazda
Dealer.
▼i-ACTIVSENSE Warning
Indication/Warning Light*
The indication displays
if the system has a
malfunction.
Check the reason for the indication
displaying on the center display or
multi-information display.
Refer to If a Warnin g Light Turns On or
Flashes on page 7-27.
▼ Exterior Light Warning Indication/
Wa r n i n g L i g h t
This light illuminates if there is a
malfunction in the exterior lights (except
license plate lights). Have your vehicle
inspected by an Authorized Mazda Dealer.
CAUTION
Do not drive the vehicle while an exterior
light has a malfunction. Poor visibility, and
not being able to signal braking and turns
may cause an accident. In addition, if the
vehicle is driven with the lights not turned
on, it may
conflict with laws and
regulations due to poor maintenance.
▼ Low Fuel Warning Indication/
Wa r n i n g L i g h t
The light turns on when the remaining fuel
is about 9.0 L (2.3 US gal, 1.9 Imp gal). If
you continue to drive after the light turns
on without refueling and the fuel gauge
reaches nearly empty
, the light flashes.
NOTE
The light illumination timing may vary
because fuel inside the fuel tank moves
around according to the driving conditions
and the vehicle posture.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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Action to be taken
Add fuel. If the light is flashing, refuel as
soon as possible.
▼Check Fuel Cap Warning
Indication/Warning Light
If the check fuel cap warning light
illuminates while driving, the fuel-filler
cap may not be installed properly.
Action to be taken
Stop the engine and reinstall the fuel-filler
cap.
Refer to Refueli
ng on page 3-28.
▼Engine Oil Level Warning
Indication/Warning Light
This warning light indicates that the
engine oil level is around the MIN mark
(page 6-16).
CAUTION
Do not continue to drive the vehicle with
the engine oil level warning indication/
warning light displayed/turned on. If the
vehicle continues to be driven with an
insufficient amount of engine oil, it could
cause damage to the engine.
Action to be taken
Add 1 L (0.3 US gal, 0.2 Imp gal) of
engine oil (page 6-15).
▼Seat Belt Warning Indication/
Warning Light (Front seat)
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 p assenger's seat belt
is unfastened (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 warning light
flashes. After a sho rt 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. (Except Mexico, Puerto Rico)
Placing heavy items on the front
passenger's seat may cause the front
passenger's seat belt warning function
to operate depending on the weight of
the item.
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'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
passenger's seat, the warning light may
not operate.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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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 signal reception area.
▼ Touch Sensor Inoperable Warning
Beep (With the advanced keyless
function)
A warning beep is activated to notify the
driver that the doors are not locked when
all of the following conditions are met:
The ignition is switched OFF.
All the doors and liftgate/trunk lid are
not fully closed.
The lock is operated 3 times within 5
seconds.
Check the ignition and whether the doors
and liftgate/trunk lid are open or closed,
and then operate the lock again.
▼ Key Left-in-luggage Compartment/
Trunk Warning Beep (With the
advanced keyless function)
If the key is left in the luggage
compartment/trunk w
ith all the doors
locked and the liftgate/trunk lid closed, a
beep will be heard outside for about 10
seconds to notify the driver that the key is
in the luggage compartment/trunk. In this
case, take out the key by pressing the
electric liftgate/trunk lid opener and
opening the liftgate/trunk lid. The key
taken out of the luggage compartment/
trunk may not operate because its
functions have been temporarily stopped.
To restore the key's functions, perform the
applicable procedure (page 3-8).
▼ Key Left-in-vehicle Warning Beep
(With the advanced keyless
function)
If all the doors and luggage compartment/
trunk are locked using another key while
the key is left in the cabin, the beep which
sounds outside of the vehicle will be heard
for about 10 seconds to notify the driver
that the key is in the cabin. In this case,
take out the key by opening the door. A
key taken out of the vehicle using this
method may not operate because its
functions have been temporarily stopped.
To restore the key's functions, perform the
applicable procedure (page 3-8).
▼Low Fuel Warning Beep
When the low fuel warning light flashes, a
warning beep is activated once at the same
time.
▼Brake Override Warning Beep
A warning beep is activated when the
accelerator pedal and brake pedal are
depressed at the same time while driving.
Only depress the brake pedal.
▼Shift Position Warning Beep
A warning beep is activated continuously
if the driver's door is opened with the
selector lever in a position other than the P
position. Shift the selector lever to the P
position, or close the driver's door.
▼Electric Parking Brake (EPB)
Warning Beep
The warning buzzer is activated under the
following conditions:
The vehicle is driven with the parking
brake applied.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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