2023 HYUNDAI IONIQ 5 ECU

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•
Natural degradation may occur with
the high voltage battery depending
on the number of years the vehicle is
used. This may reduce the distance to
empty.
• When the charge capacity and
distance to empty keep falling,
contact an authorized HYUNDAI
dealer for inspection and
maintenance.
• If the vehicle will not be in use for an
extended period of time, charge the
high voltage battery once every three
months to prevent it from discharging.
Also, if the charge amount is not
enough, immediately charge to full
and store the vehicle.
• AC charge is recommended to keep
the high voltage battery in optimal condition.
If the high voltage battery charge
amount is below 20%, you can keep
the high voltage battery performance
in optimal condition if you charge the
high voltage battery to 100%. (Once a
month or more is recommended.)
The value of the high voltage battery
charge level may vary according to
the charging conditions (state of
charger, outside temperature, battery
temperature, etc.). In order to fully
charge the battery, the current of the
high voltage battery will be gradually
decreased, so that the longevity and
safety of the battery can be secured.
CAUTION
• If the vehicle is kept with insufficient
charge for a long period, it may
damage the high voltage battery and
the high voltage battery may have to
be replaced depending on the level
of degradation.
• If the vehicle is in a collision, contact
an authorized HYUNDAI dealer to
inspect whether the high voltage
battery is still connected.
• Using the V2L function may reduce
the mileage due to the use of high
voltage battery energy, and repeated
use of the V2L function may cause
a decrease in the life of the high
voltage battery.
High Voltage Battery Warmer
System
The high voltage battery warmer system
prevents reduction of battery output
when battery temperature is low. If the
charging connector is connected, the
warmer system automatically operates
according to the battery temperature.
Charging time may shorten compare to
vehicles without the high voltage battery
warmer system. But, electricity charge
may increase because of high voltage
battery warmer system operation.
CAUTION
The high voltage battery warmer
system operates when the charging
connector is connected to the vehicle.
However, the high voltage warmer
system may not operate when battery
temperature drops below -31°F (-35°C).

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ONE1Q011011
When the remaining battery is lower than
10 % on the SOC gauge, the warning light (
) turns ON to alert you of the battery
level.
When the warning light (
) turns ON,
the vehicle can drive an additional 18 ~
25 miles (30 ~ 40 km) depending on the
driving speed, heater/air conditioner,
weather, driving style, and other factors.
Charging is required.
NOTICE
When the high voltage battery range
shows 25 ~ 30 miles (40 ~ 50 km),
the vehicle speed is limited and then
eventually the vehicle will turn OFF.
Charge the vehicle immediately.
Aux. Battery Saver+
The Aux. Battery Saver+ is a function that
monitors the charging status of the 12 V
auxiliary battery.
If the auxiliary battery level is low, the
main high voltage battery charges the
auxiliary battery.
Information
• The Aux. Battery Saver+ activates
maximum of 20 minutes. If the Aux. Battery Saver+ function activates
more than 10 times consecutively, in
the Automatic Mode the function will
stop activating, judging that there is
a problem with the auxiliary battery.
In this case, drive the vehicle for some
period of time. The function will start activating if the auxiliary battery
returns to normal.
• The Aux. Battery Saver+ function
cannot prevent battery discharge if the auxiliary battery is damaged, worn out,
used as a power supply or unauthorized
electronic devices are used.
• If the Aux. Battery Saver+ function was activated the high voltage battery level
may have decreased.

03
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• Loading cargo
- Make sure the vehicle is off, the
gear shifted to P (Park), and the
parking brake is securely applied
whenever loading or unloading
cargo. Failure to take these steps
may allow the vehicle to move
if the shift button or shift dial is
inadvertently pressed or rotated to
another position.
- When cargo is loaded through
the rear passenger seats, ensure
the cargo is properly secured
to prevent it from moving while driving.
• Do not place objects in the rear
seats, since they cannot be properly
secured and may hit vehicle
occupants in a collision causing
serious injury or death.
CAUTION
Do not allow your hands or fingers to
get caught in the seat mechanisms
while adjusting the seats.
NOTICE
To prevent damage to the vehicle: • Rear seat belts
Before folding the seatback, insert
the seat belt buckle in the holder
between the seatback and cushion.
And insert the seat belt webbing in
the guide to prevent the seat belt
from being damaged.
• Cargo
Be careful when loading cargo
through the rear passenger seats
to prevent damage to the vehicle
interior. Manual adjustment
ONE1031073N
Forward and rearward
To move the seat forward or rearward:
1. Pull the seat slide adjustment lever up
and hold it.
2. Slide the seat to the position you desire.
3. Release the lever and make sure the seat is locked in place.
Information
For the optimal safety, slide the rear seat
to the rearmost position.

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seat belts
This section describes how to use the
seat belts properly. It also describes
some of the things not to do when using
seat belts.
Seat Belt Safety Precautions
Always fasten your seat belt and make
sure all passengers have fastened their
seat belts before starting any trip. Air
bags are designed to supplement the
seat belt as an additional safety device,
not a replacement. Most countries
require all occupants of a vehicle to wear
seat belts.
WARNING
Seat belts must be used by ALL
passengers whenever the vehicle is
moving. Take the following precautions
when adjusting and wearing seat belts: • Children under the age of 13 should
be properly restrained in the rear
seats.
• Never allow children to ride in the
front passenger seat, unless the air
bag is deactivated. If a child is seated
in the front passenger seat, move
the seat as far back as possible and
properly restrain them in the seat.
• NEVER allow an infant or child to be
carried on an occupant’s lap.
• NEVER ride with the seatback
reclined when the vehicle is moving.
• Do not allow children to share a seat
or seat belt.
• Do not wear the shoulder belt under
your arm or behind your back. •
NEVER wear a seat belt over fragile
objects. If there is a sudden stop or
impact, the seat belt can damage it.
• Do not use the seat belt if it is
twisted. A twisted seat belt will not
protect you properly in an accident.
• Do not use a seat belt if the webbing
or hardware is damaged.
• Do not latch the seat belt into the
buckles of other seats.
• NEVER unfasten the seat belt
while driving. This may cause loss
of vehicle control resulting in an
accident.
• Make sure there is nothing in the
buckle interfering with the seat belt
latch mechanism. This may prevent
the seat belt from fastening securely.
• No modifications or additions
should be made by the user which
will either prohibit the seat belt
adjusting devices from operating to
remove slack, or prohibit the seat
belt assembly from being adjusted to
remove slack.
WARNING
Damaged seat belts and seat belt
assemblies will not operate properly.
Always replace: • Frayed, contaminated, or damaged
webbing.
• Damaged hardware.
• The entire seat belt assembly after it
has been worn in an accident, even
if damage to webbing or assembly is
not apparent.

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Larger children
Children under age 13 and who are
too large for a booster seat should
always occupy the rear seat and use the
available lap/shoulder belts. A seat belt
should lie across the upper thighs and
be snug across the shoulder and chest
to restrain the child safely. Check belt fit
periodically. A child’s squirming could
put the belt out of position. In the event
of an accident, children are afforded the
best safety restrained by a proper Child
Restraint System in the rear seats.
If a larger child over age 13 must be
seated in the front seat, the child must
be securely restrained by the available
lap/shoulder belt and the seat should be
placed in the rearmost position.
If the shoulder belt portion slightly
touches the child’s neck or face, try
placing the child closer to the center
of the vehicle. If the shoulder belt still
touches their face or neck, they need to
be returned to an appropriate booster
seat in the rear seat.
WARNING
• Always make sure larger children’s
seat belts are worn and properly
adjusted.
• NEVER allow the shoulder belt to
contact the child’s neck or face.
• Do not allow more than one child to
use a single seat belt. Seat belt use and injured people
A seat belt should be used when an
injured person is being transported.
Consult a physician for specific
recommendations. One person per belt
Two people (including children) should
never attempt to use a single seat belt.
This could increase the severity of
injuries in case of an accident.
Do not lie down
Sitting in a reclined position when the
vehicle is in motion can be dangerous.
Even when buckled up, the protections
of your restraint system (seat belts
and/or air bags) is greatly reduced by
reclining your seatback.
Seat belts must be snug against your
hips and chest to work properly.
During an accident, you could be thrown
into the seat belt, causing neck or other injuries.
The more the seat back is reclined, the
greater the chance for the passenger’s
hips to slide under the lap belt or the
passenger’s neck to strike the shoulder belt.
WARNING
• NEVER ride with a reclined seatback
when the vehicle is moving.
• Riding with a reclined seatback
increases your chance of serious
or fatal injuries in the event of a
collision or sudden stop.
• Driver and passengers should always
sit well back in their seats, properly
belted, and with the seatbacks
upright.

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Child RestRaint system (CRs)
Children Always in the Rear
WARNING
Always properly restrain children in
the rear seats of the vehicle. Children
of all ages are safer when restrained
in the rear seat. A child riding in the
front passenger seat can be forcefully
struck by an inflating air bag resulting in
SERIOUS INJURY or DEATH.
Children under age 13 should always
ride in the rear seats and must always be
properly restrained to minimize the risk
of injury in an accident, sudden stop or
sudden maneuver.
According to accident statistics, children
are safer when properly restrained in the
rear seats than in the front seat. Even
with air bags, children can be seriously
injured or killed. Children too large for a
Child Restraint System must use the seat
belts provided.
All 50 states have child restraint laws
which require children to travel in
approved Child Restraint Systems.
The laws governing the age or height/
weight restrictions at which seat belts
can be used instead of Child Restraint
System differs among states, so
you should be aware of the specific
requirements in your country, and where
you are travelling.
Child Restraint Systems must be properly
placed and installed in the rear seat.
You must use a commercially available
Child Restraint System that meets the
requirements of the Federal Motor
Vehicle Safety Standards (FMVSS 213).
Child Restraint Systems are generally
designed to be secured in a vehicle seat
by lap belt portion of a lap/shoulder belt,
or by a LATCH system in the rear seats of
the vehicle. Child Restraint System (CRS)
Infants and younger children must be
restrained in an appropriate rearward-
facing or forward-facing CRS that has
first been properly secured to the seat
of the vehicle. Read and comply with
the instructions for installation and use
provided by the manufacturer of the
Child Restraint System.
WARNING
An improperly secured child restraint
can increase the risk of SERIOUS
INJURY or DEATH in an accident. Always
take the following precautions when
using a Child Restraint System: • NEVER install a child or infant
restraint in the front passenger's
seat.
• Always properly secure the child
restraint to a rear seat of the vehicle.
• Always follow the child restraint
system manufacturer's instructions
for installation and use.
• Always properly restrain your child in
the child restraint.
• If the vehicle head restraint prevents
proper installation of a child seat
(as described in the child restraint
system manual), the head restraint of
the respective seating position shall
be readjusted or entirely removed.
• Do not use an infant carrier or a
child safety seat that "hooks" over
a seatback, it may not provide
adequate protection in an accident.
• After an accident, have an authorized
HYUNDAI dealer check the child
restraint system, seat belts, tether
anchors and lower anchors.

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ONE1031038N
Forward-facing Child Restraint System
A forward-facing Child Restraint System
provides restraint for the child’s body
with a harness. Keep children in a
forward-facing Child Restraint System
with a harness until they reach the top
height or weight limit allowed by your
Child Restraint System’s manufacturer.
Once your child outgrows the forward-
facing Child Restraint System, your child
is ready for a booster seat.
Booster seats
A booster seat is a Child Restraint
System designed to improve the fit of
the vehicle’s seat belt system. A booster
seat positions the seat belt so that it
fits properly over the stronger parts of
your child’s body. Keep your children in
booster seats until they are big enough
to fit in a seat belt properly.
For a seat belt to fit properly, the lap belt
must lie comfortable across the upper
thighs, not the stomach. The shoulder
belt should lie comfortable across the
shoulder and chest and not across the
neck or face. Children under age 13
must always be properly restrained to
minimize the risk of injury in an accident,
sudden stop or sudden maneuver.
Installing a Child Restraint
System (CRS)
WARNING
Before installing your Child Restraint
System always:
Read and follow the instructions
provided by the manufacturer of the
Child Restraint System.
Failure to follow all warnings and
instructions could increase the risk of
the SERIOUS INJURY or DEATH if an
accident occurs.
WARNING
If the vehicle head restraint prevents
proper installation of a Child Restraint
System, the head restraint of the
respective seating position shall be
readjusted or entirely removed.
After selecting a proper Child Restraint
System for your child and checking that
the Child Restraint System fits properly
on the seating position, there are three
general steps for a proper installation: • Properly secure the Child Restraint
System to the vehicle. All Child
Restraint Systems must be secured
to the vehicle with the lap belt or lap
part of a lap/shoulder belt or with the
lower anchor and/or tether anchor and/or with the support leg.

Seats & Safety System
3-42
•
Make sure the Child Restraint System
is firmly secured. After installing a
Child Restraint System to the vehicle,
push and pull the seat forward and
from side-to-side to verify that it is
securely attached to the seat. A Child
Restraint System secured with a seat
belt should be installed as firmly as
possible. However, some side-to-side
movement can be expected.
When installing a Child Restraint
System, adjust the vehicle seat and
seatback (up and down, forward
and rearward) so that your child fits
in the Child Restraint System in a
comfortable manner.
• Secure the child in the Child
Restraint System. Make sure the
child is properly strapped in the Child
Restraint System according to the
Child Restraint System manufacturer’s
instructions.
CAUTION
A Child Restraint System in a closed
vehicle can become very hot. To prevent
burns, check the seating surface and
buckles before placing your child in the
Child Restraint System. Lower Anchors and Tether for
Children (LATCH System)
The LATCH system holds a Child
Restraint System during driving and in
an accident. This system is designed
to make installation of the Child
Restraint System easier and reduce
the possibility of improperly installing
your Child Restraint System. The LATCH
system uses anchors in the vehicle and
attachments on the Child Restraint
System. The LATCH system eliminates
the need to use seat belts to secure the
Child Restraint System to the rear seats.
Lower anchors are metal bars built into
the vehicle. There are two lower anchors
for each LATCH seating position that will
accommodate a Child Restraint System
with lower attachments.
To use the LATCH system in your vehicle,
you must have a Child Restraint System
with LATCH attachments.
The Child Restraint System manufacturer
will provide you with instructions on how
to use the Child Restraint System with its
attachments for the LATCH anchorages.