2020 MAZDA MODEL 3 HATCHBACK ECU

▼Front Shoulder Belt Adjuster
The front seat belts
have a front shoulder
belt adjuster. If the seat belt contacts your
neck or it slips off the shoulder, adjust the
seat belt height.
To r a i s e
To heighten the seat belt, move the front
shoulder belt adjuster upward.
To l o w e r
To lower the seat belt, hold the front
shoulder belt adjuster and lower the seat
belt with the knob of the front shoulder
belt adjuster pressed.

After adjusting, press the front shoulder
belt adjuster downward and make sure that
it is securely locked.
Seat Belt Warning Systems
▼ Seat Belt Warning Systems
If it detects that the occupant seat belt is
unfastened, the warning light or beep
alerts the occupant.
Refer to Seat Belt Wa
rning Indication/
Warning Light (Front seat) on page 7-35.
Refer to Seat Belt Warning Light (Rear
seat) (Red) on page 7-36.
Refer to Seat Belt Wa rning Beep on page
7-41.

Seat belt indicator light (rear seat)
(green)
The light turns on when the rear seat belt
is fastened while the ignition is switched
ON, and it turns off after a certain period.
Essential Safety Equipment
Seat Belt Systems
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Child-RestraintPrecautions
▼ Child-Restraint Precautions
Mazda strongly urges the use of
child-restraint system
s for children small
enough to use them.

You are required by law to use a
child-restraint system for children in the
U.S. and Canada.
Check your local and state or provincial
laws for specific requirements regarding
the safety of childr en riding in your
vehicle.

Whatever child-rest raint system you
consider, please pick the appropriate one
for the age and size of the child, obey the
law and follow the i nstructions that come
with the individual ch ild-restraint system.

A child who has outgrown child-restraint
systems should sit in the rear and use seat
belts, both lap an d shoulder. If the
shoulder belt crosses the neck or face,
move the child closer to the center of the
vehicle in the outboard seats, and towards
the buckle on the right if the child is
seated on the center seat.

Statistics confirm that the rear seat is the
best place for all children up to 12 years of
age, and more so with a supplemental
restraint system (air bags).

A rear-facing child-restraint system should
NEVER be used on the front seat with the
air bag system activated. The front
passenger's seat is also the least preferred
seat for other child-restraint systems.

(With Front Passenger Occupant
Classification System)
To reduce the chance of injuries caused by
deployment of the front passenger air bag,
the front passenger seat weight sensors
occupant classification sensor works as a
part of the supplementa l restraint system.
This system deactivates the front
passenger front and side air bags and knee
air bags, and also the front passenger seat
belt pretensioner system when the front
passenger air bag deactivation indicator
light illuminates.

When an infant or small child sits on the
front passenger seat, the system shuts off
the front passenger front and side air bags
and knee air bags, and seat belt
pretensioner system, so make sure the
front passenger air bag deactivation
indicator light illuminates.

Even if the front passenger air bag is shut
off, Mazda strongly recommends that
children be prope rly restrained and
child-restraint systems of all kinds are
properly secured on the rear seats which
are the best place for children.

For more details, refer to "Front passenger
seat weight sensors" (page 2-72).

Essential Safety Equipment
Child Restraint
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WA R N I N G
Use the correct size child-restraint system:
For effective protection in vehicle accidents
and sudden stops, a child must be properly
restrained using a seat belt or
child-restraint system depending on age
and size. If not, the child could be seriously
injured or even killed in an accident.
Follow the manufacturer's instructions and
always keep the child-restraint system
buckled down:
An unsecured child-restraint system is
dangerous. In a sudden stop or a collision it
could move causing serious injury or death
to the child or other occupants. Make sure
any child-restraint system is properly
secured in place according to the
child-restraint system manufacturer's
instructions. When not in use, remove it
from the vehicle or fasten it with a seat belt,
or attach it to BOTH ISOFIX/LATCH
*1 lower
anchors for ISOFIX/LATCH
*1 child-restraint
systems and the corresponding tether
anchor.
*1 ISOFIX (Mexico)/LATCH (Except Mexico)
Always secure a child in a proper
child-restraint system:
Holding a child in your arms while the
vehicle is moving is extremely dangerous.
No matter how strong the person may be,
he or she cannot hold onto a child in a
sudden stop or collision and it could result
in serious injury or death to the child or
other occupants. Even in a moderate
accident, the child may be exposed to air
bag forces that could result in serious injury
or death to the child, or the child may be
slammed into an adult, causing injury to
both child and adult.
Never use a rear-facing child-restraint
system in the front seat with an air bag
that could deploy:
Rear-facing child-restraint systems on the
front seat are particularly dangerous even
though you may feel assured that a front
passenger air bag will not deploy based on
the fact that the front passenger air bag
deactivation indicator light illuminates.
The child-restraint system can be hit by a
deploying air bag and moved violently
backward resulting in serious injury or
death to the child.
Essential Safety Equipment
Child Restraint
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CAUTION
A seat belt or child-restraint system can
become very hot in a closed vehicle during
warm weather. To avoid burning yourself
or a child, check them before you or your
child touches them.
NOTE
Your Mazda is equipped with ISOFIX/
LATCH
*1 lower anchors for attachment of
specially design ed ISOFIX/LATCH
*1
child-restraint systems on the rear seats.
When using these anchors to secure a
child-restraint system, refer to "Using
ISOFIX Lower Anchor (Mexico)/Using
LATCH Lower Anchor (Except Mexico)"
(page 2-50).
*1 ISOFIX (Mexico)/LATCH (Except
Mexico)
Essential Safety Equipment
Child Restraint
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Child-Restraint System Suitability for Various Seat
Positions Table
▼ Child-Restraint System Suitability
for Various Seat Positions Table
(Mexico)
Provided information in the tabl e shows your child-restraint system suitability for various
seating position. For installation suitability of other manufac turer child-restraint system,
carefully consult the manufacture r's instructions which accompany the child-restraint
system.
When installing a child-restraint system, the following points must be observed:
Always remove the head restraint before installing a child-restraint system. However,
when installing a backless booster seat, always install the veh icle head restraint to the seat
where the backless booster seat is installed. In addition, alwa ys use a tether strap and
attach it securely. Refer to H ead Restraints on page 2-17.
When installing a child-restrain t system to the front passenger seat, adjust the seat slide
position as far back as possible.
Refer to Adjusting the Front Passenger's Seat on page 2-13.
When it is difficult to install a child-restraint system to the front passenger seat, or the seat
belt cannot be secured to the ch ild-restraint system, perform the following operations to
adjust the seat holding the child-restraint system so that the seat belt can be secured
completely to it.
Move the seat forward or back.
Move the seatback forward or back.
Move the seat upward or downward. (Vehicles with height adjustm ent function)
When installing a child-restraint system to the rear seat, adjust the front seat position so
that the front seat does not contact the child-restraint system .
Refer to Adjusting the Driver's Seat on page 2-5.
Refer to Adjusting the Front Passenger's Seat on page 2-13.
When installing a child-restrain t system equipped with a tether, remove the head restraint.
Refer to Head Restraints on page 2-17.
An i-Size child-restra int system refers to a child-restraint sy stem which has acquired
i-Size category certification fo r the UN-R 129 regulation.
When installing a child-restraint system to the rear seat, refer to the child-restraint system
manufacturer's instructions and the Using ISOFIX Lower Anchor o n page 2-50.
Seating position Passenger Rear (Left) Rear (Center) Rear (Right)
Seating position suit‐
able for universal
belted (Yes/No) Ye s ( U F )
Ye s ( U )Ye s ( U )Ye s ( U )
Essential Safety Equipment
Child Restraint
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L = Suitable for particular child restraints given on attached list. These restraints may be of the “specific vehicle”,
“restricted” or “semi-universal” categories.
IL = Suitable for particular ISO FIX child restraint systems (CRS) given in the attached list. These ISOFIX CRS are
those of the “specific vehicle”, “restricted” or “semi-universal” categories.
i-U = Suitable for i-Size “unive rsal” Child Restraint Systems forward and rearward facing.
i-UF = Suitable for forward-faci ng i-Size “universal” Child Restraint Systems only.
Yes = Child-restraint system can be secured on the seat.
No = Child-restraint system canno t be secured on the seat, or there is no fixture.
X = Child-restraint syste m cannot be installed.
*1 Child restraint system can only be installed in the forward-facing position.
A Mazda genuine child-restraint system can be installed. Regard ing child-restraint systems which can be installed,
refer to the accessories catalog.
(Except Mexico)
Regarding child-restraint system s which can be installed to your Mazda, consult an
Authorized Mazda Dealer.
A child-restraint system with a support leg cannot be installed on the rear center seat
position.
Please comply with the legal regulations concerning the use of child-restraint systems in
your country.
For the CRS which do not carry t he ISO/XX size class identification (A to G), for the
applicable mass group, the child seat manufacturer shall indica te the vehicle specific
LATCH child-restraint systems recommended for each position.
Essential Safety Equipment
Child Restraint
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Installing Child-RestraintSystems
▼Installing Child-Restraint Systems
Accident statistics reveal that a child is
safer in the rear seat
. The front passenger's
seat is clearly the worst choice for any
child under 12, and with rear-facing
child-restraint system s it is clearly unsafe
due to air bags.

NOTE
Even if your vehicle is equipped with front
passenger occupant classification sensor
(page 2-72), which automatically
deactivates the front passenger air bag, a
rear seat is the safest place for a child of
any age or size.

Some child-restraint systems now come
with tethers and t herefore must be
installed on the seats that take tethers to be
effective. In your Mazda, tethered
child-restraint systems can only be
accommodated in the three positions on
the rear seat.

Some child-restraint systems also employ
specially designed ISOFIX/LATCH
*1
attachments; refer to "Using ISOFIX
Lower Anchor (Mexico)/Using LATCH
Lower Anchor (Except Mexico)" (page
2-50).
*1 ISOFIX (Mexico)/LATCH (Except Mexico)
WA R N I N G
Tethered Child-Restraint Systems Work
Only on Tether-Equipped Rear Seats:
Installation of a tether equipped
child-restraint system in the front
passenger's seat defeats the safety design
of the system and will result in an increased
chance of serious injury if the
child-restraint system goes forward
without benefit of being tethered.
Place tether equipped child-restraint
systems where there are tether anchors.
▼Anchor Bracket
Anchor brackets for securing
child-restraint systems are equipped in the
vehicle. Locate each anchor position using
the illustration.
To install a child-restraint system, remove
the head restraint. Always follow the
instruction manual accompanying the
child-restraint system.

Anchor bracket location
Use the indicated anchor bracket locations
when installing a ch
ild-restraint system
equipped with a tether.
(4–Door)
1. For right
2. For center (Except Mexico)
Essential Safety Equipment
Child Restraint
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(5–Door)
1. Tether strap
2. Anchor bracket
3. Forward

Always install the head restraint and adjust
it to the appropriate position after
removing the child-restraint system:
Driving with the head restraint removed is
dangerous as impact to the occupant's
head cannot be prevented during
emergency braking or in a collision, which
could result in a serious accident, injury or
death.
Refer to Head Restraints on page 2-17.
▼Using Automatic Locking Mode
(Except Mexico)
Follow these instructions when using a
child-restraint system, unless you are
attaching a LATCH-equipped
child-restraint syst
em to the rear LATCH
lower anchors. Refer to “Using LATCH
Lower Anchor” (page 2-50).
NOTE
Follow the child- restraint system
manufacturer's instructions carefully. If
you are not sure whether you have a
LATCH system or tether, check in the
child-restraint system manufacturer's
instructions and follow them accordingly.
Depending on the type of child-restraint
system, it may use LATCH system instead
of seat belts or if the belt goes across the
child's chest, may recommend against
using automatic locking mode.
1. Make sure the seatback is securely latched by pushing it back until it is
fully locked.
2. Remove the head restraint. However,
when installing a backless booster seat,
always install the vehicle head restraint
to the seat where the backless booster
seat is installed.
Refer to Head Restraints on page 2-17.
3. Secure the child-restraint system with the lap portion of the lap/shoulder belt.
See the manufacturer's instructions on
the child-restraint system for belt
routing instructions.
Essential Safety Equipment
Child Restraint
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