2021 HYUNDAI TUCSON HYBRID fuel type

Foreword / Hybrid System Overview
1-6
Using Fuel Additives (except Detergent Fuel Additives)
Using fuel additives such as:
-Silicone fuel additive
-Ferrocene (iron-based) fuel additive
-Other metallic-based fuel additives
may result in cylinder misfire, poor acceleration, engine stalling, damage to the
catalyst, or abnormal corrosion, and may cause damage to the engine resulting in a
reduction in the overall life of the powertrain.
- The Malfunction Indicator Lamp (MIL) may illuminate.
NOTICE
Damage to the fuel system or performance problem caused by the use of these fuels
may not be covered by your New Vehicle Limited Warranty.
Gasoline containing MMT
Some gasoline contains harmful manganese-based fuel additives such as MMT
(Methylcyclopentadienyl Manganese Tricarbonyl). HYUNDAI does not recommend the
use of gasoline containing MMT. This type of fuel can reduce vehicle performance and
affect your emission control system.
The malfunction indicator lamp on the cluster may come on.
Detergent Fuel Additives
HYUNDAI recommends that you use good quality gasolines treated with detergent
additives such as TOP TIER Detergent Gasoline, which help prevent deposit formation
in the engine. These gasolines will help the engine run cleaner and enhance
performance of the Emission Control System. For more information on TOP TIER
Detergent Gasoline, please go to the website (www. toptiergas.com).
For customers who do not use TOP Tier Detergent Gasoline regularly, and have
problems starting or the engine does not run smoothly, detergent-based fuel additives
that you can purchase separately may be added to the gasoline. If TOP TIER Detergent
Gasoline is not available, one bottle of additive added to the fuel tank according to the
maintenance schedule is recommended (refer to the Maintenance Schedule in chapter
9).
Additives are available from your authorized HYUNDAI dealer along with information
on how to use them. Do not mix other additives.
Operation in foreign countries
If you are going to drive your vehicle in another country, be sure to:
• Observe all regulations regarding registration and insurance.
• Determine that acceptable fuel is available.

Instrument cluster
4-36
2. Cluster
ItemsExplanation
Reset fuel
economy
• At vehicle start
• After refueling
• Manually
To reset the fuel economy displayed.
Wiper/Lights DisplayTo activate or deactivate the Wiper/ Light mode.
When activated, the LCD display shows the selected Wiper/Light mode
whenever you changed the mode.
Traffic Signs To set the traffic signs displayed.
Cluster Voice Guidance Volume To adjust the cluster voice guidance volume.
Icy Road Warning To activate or deactivate the icy road warning.
Theme
Selection You can select the theme of the cluster.
• Type A Cluster : Theme A / Theme B / Theme C
• Type B Cluster : Link to Drive Mode /CLASSIC A/CLASSIC B/CLASSIC C/
CUBE
Blind-Spot View To Activate or deactivate Blind-Spot View.
3. Lights
Items
Explanation
Illumination To adjust the illumination level.
• Level 1~20
One Touch
Turn Signal
• Off : The one touch turn signal function will be deactivated.
• 3, 5, 7 Flashes : The turn signal indicator will blink 3, 5, or 7 times when
the turn signal lever is moved slightly.
For more details, refer to “Lighting” in chapter 5.
Ambient Light
Brightness
(if equipped)
• Off
• Level 1/2/3/4
Ambient
Light Color
(if equipped)
• Polar White/Moon White/Ice Blue/Ocean Blue/Jade Green/Orchid Green/
Freesia Yellow/ Sunrise Red/Aurora Purple/Lightening Violet
Headlight Delay To activate or deactivate the headlamp delay function.
For more details, refer to "Lighting" in chapter 5.
High Beam Assist To activate or deactivate High Beam Assist function.
For more details, refer to "High Beam Assist (HBA)" in chapter 5.
Ã
The information provided may differ depending on which functions are applicable
to your vehicle.

Convenient features
5-80
• If a fire breaks out during refueling,
leave the vicinity of the vehicle, and
immediately contact the manager
of the gas station and then contact
the local fire department. Follow any
safety instructions they provide.
• If pressurized fuel sprays out, it can
cover your clothes or skin and thus
subject you to the risk of fire and
burns. Always remove the fuel cap
carefully and slowly. If the cap is
venting fuel or if you hear a hissing
sound, wait until the condition stops
before completely removing the cap.
• Always check that the fuel cap is
installed securely to prevent fuel
spillage in the event of an accident.
Information
Make sure to refuel your vehicle according
to the “Fuel Requirements” section in
suggested in chapter 1.
NOTICE
• Do not spill fuel on the exterior
surfaces of the vehicle. Any type of
fuel spilled on painted surfaces may
damage the paint.
• If the fuel filler cap requires
replacement, use only a genuine
HYUNDAI cap or the equivalent
specified for your vehicle. An
incorrect fuel filler cap can result
in a serious malfunction of the fuel
system or emission control system.

06
6-53
Driving in flooded areas
Avoid driving through flooded areas
unless you are sure the water is no
higher than the bottom of the wheel hub.
Drive through any water slowly. Allow
adequate stopping distance because
brake performance may be reduced.
After driving through water, dry the
brakes by gently applying them several
times while the vehicle is moving slowly.
Highway driving
Tires
Adjust the tire inflation, as specified.
Under-inflation may overheat or damage
the tires.
Do not install worn-out or damaged tires,
which may reduce traction or fail the
braking operation.
Information
Never over-inflate your tires above the
maximum inflation pressure, as specified
on your tires.
Fuel, engine coolant and engine oil
Driving at higher speeds on the highway
consumes more fuel and is less efficient
than driving at a slower, more moderate
speed. Maintain a moderate speed in
order to conserve fuel when driving on
the highway.
Be sure to check both the engine coolant
level and the engine oil before driving.
Drive belt
A loose or damaged drive belt may
overheat the engine.
Reducing the risk of a rollover
Your multi-purpose passenger vehicle is
defined as a Sports Utility Vehicle (SUV).
SUV’s have higher ground clearance
and a narrower track to make them
capable of performing in a wide variety
of off-road applications. The specific
design characteristics give them a higher
center of gravity than ordinary vehicles
making them more likely to roll over if
you make abrupt turns. Utility vehicles
have a significantly higher rollover rate
than other types of vehicles. Due to this
risk, driver and passengers are strongly
recommended to buckle their seat belts.
In a rollover crash, an unbelted person
is significantly more likely to die than a
person wearing a seat belt.
There are steps that a driver can make
to reduce the risk of a rollover. If at all
possible, avoid sharp turns or abrupt
maneuvers, do not load your vehicle
with heavy cargo on the roof, and never
modify your vehicle in any way.
WARNING
Utility vehicles have a significantly
higher rollover rate than other types of
vehicles. To prevent rollovers or loss of
control:
• Take corners at slower speeds than
you would with a passenger vehicle.
• Avoid sharp turns and abrupt
maneuvers.
• Do not modify your vehicle in any
way that you would raise the center
of gravity.
• Keep tires properly inflated.
• Do not carry heavy cargo on the roof.
WARNING
In a rollover crash, an unbelted person
is significantly more likely to die than a
person wearing a seat belt. Make sure
all passengers are wearing their seat
belts.

Emergency situations
8-4
if tHe engine will not start
• Be sure to shift the gear to N (Neutral)
or P (Park). The engine starts only
when the gear is in N (Neutral) or P
(Park).
• This vehicle does not have a regular
12V battery that needs periodic
replacement. It is lithium ion polymer
type integrated into the HEV high
voltage battery. The vehicle has a
12V battery protection system that
cuts 12V battery from vehicle draw
to prevent full discharge. If vehicle
will not start, first try pressing the
12V Battery Reset switch (left side of
the steering wheel near the fuel door
open switch) to reconnect the 12V
battery, but you must start vehicle
within 15 seconds of pressing the 12V
Battery Reset switch. After starting
the vehicle (
indicator ON ),
operate the vehicle safely outdoors in
ready mode stopped and/or drive it
for 30 minutes total to charge the 12V
battery fully.
• Check the fuel level and add fuel if
necessary.
If the vehicle still does not start, we
recommend that you call an authorized
HYUNDAI dealer for assistance.
NOTICE
Push or pull starting the vehicle may
cause the catalytic converter to
overload which can lead to damage to
the emission control system.

09
9-31
tirEs and whEEls
WARNING
Tire failure may cause loss of
vehicle control resulting in an
accident. To reduce risk of SERIOUS
INJURY or DEATH, take the
following precautions:
• Inspect your tires monthly for
proper inflation as well as wear
and damage.
• The recommended cold tire
pressure for your vehicle can be
found in this manual and on the
tire label located on the driver’s
side center pillar. Always use a
tire pressure gauge to measure
tire pressure. Tires with too
much or too little pressure wear
unevenly causing poor handling.
• Check the pressure of the spare
tire every time you check the
pressure of the other tires on
your vehicle.
• Replace tires that are worn, show
uneven wear, or are damaged.
Worn tires can cause loss of
braking effectiveness, steering
control, or traction.
• ALWAYS replace tires with the
same size, type, construction and
tread pattern as each tire that
was originally supplied with this
vehicle. Using tires and wheels
other than the recommended
sizes could cause unusual
handling characteristics, poor
vehicle control, or negatively
affect your vehicle’s Anti-Lock
Brake System (ABS) resulting in a
serious accident.
Tire care
For proper maintenance, safety, and
maximum fuel economy, you must
always maintain recommended
tire inflation pressures and stay
within the load limits and weight
distribution recommended for your
vehicle.
OTM010024L
All specifications (sizes and
pressures) can be found on a label
attached to the driver’s side center
pillar.
Recommended cold tire inflation
pressures
All tire pressures (including the
spare) should be checked when the
tires are cold. “Cold tires” means the
vehicle has not been driven for at
least three hours or driven less than 1
mile (1.6 km).
Warm tires normally exceed
recommended cold tire pressures
by 4 to 6 psi (28 to 41 kPa). Do not
release air from warm tires to adjust
the pressure or the tires will be
under-inflated. For recommended
inflation pressure, refer to “Tire and
Wheels” section in chapter 2.

Maintenance
9-48
Engine compartment fuse panel
Fuse Name Fuse ratingCircuit Protected
MDPS 80A/100A MDPS Unit (Column Type-80A) / MDPS Unit (Rack Type-
100A)
C/FAN 80ACooling Fan Motor
B+1 60AICU Junction Block (IPS01, IPS02, IPS03, IPS04, IPS05)
B+3 60AICU Junction Block (Power Window Main Relay, Fuse : F2,
F3, F5, F6, F8, F9, F11, F12, F18, F15)
CVVD 50ACVVD Actuator
Bower 40AE/R Junction Block (RLY.10)
IEB3 40AIEB Unit
Rear Defogger 40AE/R Junction Block (RLY.14)
Trailer1 50ATrailer Connector Unit
B+4 50AICU Junction Block (Long Term Load Latch Relay, Fuse : F1,
F4, F14, F17, F20, F21, F24, F27)
IEB2 60AIEB Unit
IEB1 60AIEB Unit
B+2 50AICU Junction Block (IPS06, IPS07, IPS08, IPS10, IPS11)
PTC Heater 50AE/R Junction Block (RLY.13)
PTG 40APower Tailgate Unit
E-Shifter1 30ASCU
Fuel Pump 20AE/R Junction Block (RLY.7)
AWD 20AAWD ECM
ECU4 10AECM
IG3 20AE/R Junction Block (RLY.3)