2021 HYUNDAI SANTA FE ECU

01
1-5
Gasoline engine
Unleaded
Your new vehicle is designed to use only unleaded fuel having an octane number
((R+M)/2) of 87 (Research Octane Number 91) or higher. (Do not use methanol blended
fuels)
Your new vehicle is designed to obtain maximum performance with UNLEADED FUEL,
as well as minimize exhaust emissions and spark plug fouling.
NOTICE
To prevent damage to the engine and engine components, never add any fuel
system cleaning agents to the fuel tank other than what has been specified.
Consult an authorized HYUNDAI dealer for additional information.
WARNING
•Do not “top off” after the nozzle automatically shuts off when refueling.
• Always check that the fuel cap is installed securely to prevent fuel spillage in the
event of an accident.
Gasoline containing alcohol and methanol
Gasohol, a mixture of gasoline and ethanol (also known as grain alcohol) are being
marketed along with or instead of leaded or unleaded gasoline. For example, “E15” is a
gasohol comprised of 15% ethanol and 85% gasoline.
Do not use gasohol containing more than 15% ethanol, and do not use gasoline or
gasohol containing any methanol. Either of these fuels may cause drivability problems
and damage to the fuel system, engine control system and emission control system.
Discontinue using gasohol of any kind if drivability problems occur.
“E85” fuel is an alternative fuel comprised of 85 percent ethanol and 15 percent
gasoline, and is manufactured exclusively for use in Flexible Fuel Vehicles. “E85” is
not compatible with your vehicle. Use of “E85” may result in poor engine performance
and damage to your vehicle’s engine and fuel system. HYUNDAI recommends that
customers do not use fuel with an ethanol content exceeding 15 percent.
NOTICE
To prevent damage to your vehicle’s engine and fuel system:
•Never use gasohol which contains methanol.
• Never use gasohol containing more than 15% ethanol.
• Never use leaded fuel or leaded gasohol.
• Never use “E85” fuel.
Your New Vehicle Limited Warranty does not cover damage to the fuel system or any
performance problems caused by the use of “E85” fuel.
FUEL REQUIREMENTS

Seats & Safety System
3-10
OTM030055
Lumbar support (for driver’s seat, if
equipped)
To adjust the lumbar support:
1.
Press the fr
ont portion of the switch
(1) to increase support or the rear
portion of the switch (2) to decrease
support.
2.
Press s

witch (3) or (4) to move the
support position up or down.
3.
Release the s

witch once the lumbar
support reaches the desired position.
Seatback pocket
OTM030046
The seatback pocket is provided on the
back of the front seatbacks.
CAUTION
Do not put heavy or sharp objects in the
seatback pockets. In an accident they
could come loose from the pocket and
injure occupants.
Rear seats
OTM030065
Forward and backward (2nd row seat)
To move the seat forward or backward:
1.
Pull the seat slide adjus

tment lever up
and hold it.
2.
Slide the seat t

o the position you
desire.
3.
Release the le

ver and make sure the
seat is locked in place.
Adjust the seat before driving, and make
sure the seat is locked securely by trying
to move forward and backward without
using the lever. If the seat moves, it is not
locked properly.

Seats & Safety System
3-12
OTM030073
4. Pull on the seatback folding lever (2nd
row seat), then fold the seat toward
the front of the vehicle. When you
return the seatback to its upright
position, always be sure it has locked
into position by pushing on the top of
the seatback.
OTM030074
5. To use the rear seat, lift and pull the
sea tback backward by pulling the
folding lever or the strap. Pull the
seatback firmly until it clicks into
place. Make sure the seatback is
locked in place.
6.
Re

turn the rear seat belt to the proper
position.
WARNING
When returning the rear seatback from
a folded to an upright position, hold the
seatback and return it slowly. Ensure
that the seatback is completely locked
into its upright position by pushing on
the top of the seatback. In an accident
or sudden stop, the unlocked seatback
could allow cargo to move forward with
great force and enter the passenger
compartment, which could result in
serious injury or death.
WARNING
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.

03
3-13
WARNING
Make sure the engine is off, the shift
lever is in 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 lever is inadvertently
moved to another position.
CAUTION
• Be careful when loading cargo
through the rear passenger seats
to prevent damage to the vehicle
interior.
• When cargo is loaded through the
rear passenger seats, ensure the
cargo is properly secured to prevent
it from moving while driving.
WARNING
Cargo should always be secured to
prevent it from being thrown about the
vehicle in a collision and causing injury
to the vehicle occupants. Do not place
objects in the rear seats, since they
cannot be properly secured and may hit
the front seat occupants in a collision.
2nd row seat folding (if equipped)
(from outside)
OTMA038034
Push the 2nd row seat back folding
switch (1) located in the right side in the
liftgate. (L : Left seatback folding,
R : Right seatback folding)
WARNING
Rear seat folding
Do not fold the rear seats, if passengers,
pets or luggage are in the rear seats.
It may cause injury or damage to
passengers, pets, luggage.

03
3-23
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,
but they are not a substitute. 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 prevent the seat belt
adjusting devices from operating to
remove slack, or prevent 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.

03
3-27
Rear Seat Belt – Passenger’s 3point
system with convertible locking
retractor
This type of seat belt combines the
features of both an emergency locking
retractor seat belt and an automatic
locking retractor seat belt. Convertible
retractor type seat belts are installed
in the rear seat positions to help
accommodate the installation of child
restraint systems. Although a convertible
retractor is also installed in the front
passenger seat position, NEVER place
any infant/child restraint system in the
front seat of the vehicle.
To fasten your seat belt:
Pull the seat belt out of the retractor
and insert the metal tab into the buckle.
There will be an audible “click” when
the tab locks into the buckle. When
not securing a child restraint, the seat
belt operates in the same way as the
driver’s seat belt (Emergency Locking
Retractor Type). It automatically adjusts
to the proper length only after the lap
belt portion of the seat belt is adjusted
manually so that it fits snugly across your
hips.
When the seat belt is fully extended from
the retractor to allow the installation of
a child restraint system, the seat belt
operation changes to allow the belt to
retract, but not to extend (Automatic
Locking Retractor Type). Refer to the
“Using a Child Restraint System” section
in this chapter.
OHI038142
To release your seat belt:
Press the release button (1) in the locking
buckle.
When it is released, the belt should
automatically draw back into the
retractor. If this does not happen, check
the belt to be sure it is not twisted, then
try again.
NOTICE
Although the seat belt retractor provides
the same level of protection for seated
passengers in either emergency
or automatic locking modes, the
emergency locking mode allows seated
passengers to move freely in their seat
while keeping some tension on the belt.
During a collision or sudden stop, the
retractor automatically locks the belt to
help restrain your body.
To deactivate the automatic locking
mode, unbuckle the seat belt and allow
the belt to fully retract.

Seats & Safety System
3-32
WARNING
ALWAYS properly restrain infants and
small children in a Child Restraint
System appropriate for the child’s
height and weight.
To reduce the risk of serious injury or
death to a child and other passengers,
NEVER hold a child in your lap or arms
when the vehicle is moving. The violent
forces created during an accident will
tear the child from your arms and throw
the child against the interior of the
vehicle.
Small children are best protected from
injury in an accident when properly
restrained in the rear seat by a Child
Restraint System that meets the
requirements of the Safety Standards of
your country. Before buying any Child
Restraint System, make sure that it has
a label certifying that it meets Safety
Standard of your country.
The Child Restraint System must be
appropriate for your child’s height and
weight. Check the label on the Child
Restraint System for this information.
Refer to “Child Restraint Systems”
section in this chapter.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.

Seats & Safety System
3-34
Children Always in the Rear
WARNING
Always properly restrain children in 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.
ChILD REsTRAInT s YsTEm (CRs)