2021 HYUNDAI TUCSON HYBRID cooling

01
1-23
NOTICE
• When the vehicle is paint baked, do
not bake over 30 minutes in 158°F
(70°C) or 20 minutes in 176°F (80°C)
degree.
• Do not wash the engine
compartment, using water. Water
may cause an electric shock and
damage the electronic components.
WARNING
This hybrid vehicle uses the hybrid
battery system inverter and converter
to generate high voltage. High voltage
in the hybrid battery system is very
dangerous and may cause severe burns
and electric shock. This may result in
serious injury or death.
• For your safety, never touch,
replace, disassemble or remove the
hybrid battery system including
components, cables and connectors.
Severe burns or electric shock may
result in serious injury or death when
you fail to follow this warning.
• When the hybrid battery system
operates, the hybrid battery system
can be hot. Always be careful
because burns or electric shock may
be caused by high voltage.
• Do not spill liquid on the HPCU, HSG,
motor and fuses. If the hybrid system
components come in contact with
liquid, it may result in electric shock.
Service interlock connector
ONX4HQ010013
In case of emergency, cut the service
interlock connector cable to isolate the
high voltage of the battery.
WARNING
Never disconnect the service interlock
connector or cut the wire except in an
emergency situation.
Serious problems may occur, such as
the vehicle will not start.
Hybrid battery cooling duct
ONX4HQ010014
The hybrid battery cooling duct is
located of the Passenger’s seat. The
cooling duct cools down the hybrid
battery. When the hybrid battery cooling
duct is blocked, the hybrid battery may
be overheated.
Clean the cooling duct for the hybrid
battery with a dry cloth on a regular
basis.

Foreword / Hybrid System Overview
1-24
WARNING
• Never clean the cooling duct of the
hybrid battery with a wet cloth. If
any water enters the cooling duct
of the hybrid battery, the hybrid
battery may cause an electric shock,
resulting in a serious damage, an
injury or a death.
• The hybrid battery is composed of
lithium-ion polymer. If the hybrid
battery is improperly handled, it is
dangerous to the environment. Also
it may cause electrical shock and
severe burns, resulting in a serious
injury or a death.
• Do not spill liquid over the cooling
duct of the hybrid battery. Doing
so is very dangerous. It may cause
electric shock or serious injury.
• Do not cover the cooling duct with
objects.
• Do not put any objects into the
cooling duct of the hybrid battery.
Doing so may cause loss of cooling
duct volume to the hybrid battery.
When the cooling duct is blocked
with any objects, immediately
contact your HYUNDAI dealer.
• Never place a container of liquid on
or near the cooling duct. If the liquid
spills, the hybrid battery located in
the under floor may be damaged.
• Do not obstruct the cooling duct
with any other objects.
If an accident occurs
WARNING
• For your safety, do not touch the
high voltage cables, connectors
and package modules. High voltage
components are orange in color.
• Exposed cables or wires may be
visible inside or outside of the
vehicle. Never touch the wires or
cables, because an electrical shock,
an injury, or a death may occur.
• Any gas or electrolyte leakage from
your vehicle is not only poisonous
but also flammable. Upon witnessing
one of those, open the windows,
and remain a safe distance from the
vehicle out of the road.
Immediately call an emergency
services or contact an authorized
HYUNDAI dealer and advise them
that a hybrid vehicle is involved.
• When the vehicle is severely
damaged, remain a safe distance of
49 feet or more between your vehicle
and other vehicles/flammables.

Convenient features
5-98
ONX4050072
Information
Never place anything near the sensor to
ensure better control of the heating and
cooling system.
Manual heating and air
conditioning
The heating and cooling system can be
controlled manually by pushing buttons
other than the AUTO button. In this case,
the system works sequentially according
to the order of buttons selected. When
pressing any button except the AUTO
button while using automatic operation,
the functions not selected will be
controlled automatically.
1.
Start the engine.
2.
Set the mode t

o the desired position.
For improving the effectiveness of
heating and cooling, select:
- Hea

ting:
- Cooling:
3. Set the temperature control to the
desired position.
4.
Set the air in

take control to the
outside (fresh) air position.
5.
Set the f

an speed control to the
desired speed.
6.
If air conditioning is desired, turn the
air conditioning s

ystem on.
7.
Press the A

UTO button to convert to
full automatic control of the system.
When starting the vehicle in cold
weather using manual temperature
control, operate the system in the
following method to improve heating.
- Turn o

ff or lower the blower, right
after starting the engine.
• Allow the engine to warm up during
this time since the air flow from the
heater is still cold.
- Aft

er a few minutes of engine warm
up, turn on or set the fan to a higher
level and adjust the temperature
setting to hot.

05
5-107
Air conditioning
HYUNDAI Air Conditioning Systems are
filled with R-1234yf refrigerant.
1.
Start the engine. Push the air
conditioning butt
on.
2.
Set the mode t

o the
position.
3.
Set the air in

take control to the
outside air or recirculated air position.
4.
Adjus

t the fan speed control and
temperature control to maintain
maximum comfort.
Information
ONX4050071
Your HYUNDAI vehicle is filled with
R-1234-yf refrigerant. Information
regarding the refrigerant designation
for your vehicle can be found on the
information label located under the hood.
Refer to chapter 8 for the location of the
air conditioning refrigerant label.
NOTICE
• The refrigerant system should only
be serviced by trained and certified
technicians to insure proper and safe
operation.
• The refrigerant system should be
serviced in a well-ventilated place.
• The air conditioning evaporator
(cooling coil) shall never be repaired
or replaced with one removed from
a used or salvaged vehicle and new
replacement MAC evaporators shall
be certified (and labeled) as meeting
SAE Standard J2842.
NOTICE
• When using the air conditioning
system, monitor the temperature
gauge closely while driving up
hills or in heavy traffic when
outside temperatures are high.
Air conditioning system operation
may cause engine overheating.
Continue to use the fan but turn the
air conditioning system off if the
temperature gauge indicates engine
overheating.
• When opening the windows in humid
weather air conditioning may create
water droplets inside the vehicle.
Since excessive water droplets
may cause damage to electrical
equipment, air conditioning should
only be used with the windows
closed.

Convenient features
5-108
Air conditioning system operation tips
• If the vehicle has been parked in
direct sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.
• After sufficient cooling has been
achieved, switch back from the
recirculated air to the fresh outside air
position.
• To help reduce moisture inside of
the windows on rainy or humid
days, decrease the humidity inside
the vehicle by operating the air
conditioning system with the windows
and sunroof closed.
• Use the air conditioning system every
month for a few minutes to ensure
maximum system performance.
• If you operate the air conditioner
excessively, the difference between
the temperature of the outside air and
that of the windshield could cause
the outer surface of the windshield to
fog up, causing loss of visibility. In this
case, set the mode selection button to
the
position and set the fan speed
control knob to the lowest speed
setting.
System maintenance
Cabin air filter
OIK047401L[A] : Outside air, [B] : Recirculated air
[C] : Cabin air filter, [D] : Blower
[E] : Evaporator core, [F] : Heater core
The cabin air filter is installed behind
the glove box. It filters the dust or other
pollutants that enter the vehicle through
the heating and air conditioning system.
We recommend that the cabin air filter
be replaced by an authorized HYUNDAI
dealer according to the maintenance
schedule. If the vehicle is being driven
in severe conditions such as dusty or
rough roads, more frequent climate
control filter inspections and changes are
required.
If the air flow rate suddenly decreases,
we recommend the system be checked
at an authorized HYUNDAI dealer.

Convenient features5-110
winDshielD Defr osting AnD Def ogging
WARNING
Windshield heating
Do not use the
position during
cooling operation in extremely humid
weather. The difference between the
temperature of the outside air and that
of the windshield could cause the outer
surface of the windshield to fog up,
causing loss of visibility could cause
an accident resulting in serious injury
or death. In this case, set the mode
selection button to the
position
and fan speed control knob to a lower
speed.
• For maximum defrost performance,
set the temperature control to the
highest temperature setting and
the fan speed control to the highest
setting.
• If warm air to the floor is desired while
defrosting or defogging, set the mode
to the floor-defrost position.
• Before driving, clear all snow and ice
from the windshield, rear window,
side view mirrors, and all side
windows.
• Clear all snow and ice from the
hood and air inlet in the cowl grill
to improve heater and defroster
efficiency and to reduce the
probability of fogging up the inside of
the windshield.
NOTICE
If the engine temperature is still cold
after starting, then a brief engine warm
up period may be required for the
vented air flow to become warm or hot.
Automatic climate control
system
To defog inside windshield
ONX4H050100
„„ Type A „„ Type B
1. Select the desired f
an speed.
2.
Select the desired t
emperature.
3.
Press the de

froster button (
).
4.
The air-conditioning will turn on
accor

ding to the detected ambient
temperature, outside (fresh) air
position and higher fan speed will be
selected automatically.
If the air-conditioning, outside (fresh)
air position and higher fan speed are
not selected automatically, adjust the
corresponding button or knob manually.
If the
position is selected, lower fan
speed is controlled to higher fan speed.

06
6-57
Winter precautions
Use high quality ethylene glycol coolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type of
coolant that should be used because it
helps prevent corrosion in the cooling
system, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 9. Before winter, have your
coolant tested to assure that its freezing
point is sufficient for the temperatures
anticipated during the winter.
Check battery and cables
Winter temperatures affect battery
performance. Inspect the battery and
cables, as specified in chapter 9. The
battery charging level can be checked
by an authorized HYUNDAI dealer or in a
service station.
Change to “winter weight” oil if
necessary
In some regions during winter, it is
recommended to use the “winter
weight” oil with lower viscosity In
addition, replace the engine oil and filter
if it is close to the next maintenance
interval. Fresh engine oil ensures
optimum engine operation during the
winter months. For further information,
refer to chapter 2. When you are not
sure about a type of winter weight oil,
we recommend that you consult an
authorized HYUNDAI dealer.Check spark plugs and ignition system
Inspect the spark plugs, as specified in
chapter 9. If necessary, replace them.
Also check all ignition wirings and
components for any cracks, wear-out,
and damage.
To prevent locks from freezing
To prevent the locks from being frozen,
spray approved de-icing fluid or glycerin
into key holes. When a lock opening is
already covered with ice, spray approved
de-icing fluid over the ice to remove it.
When an internal part of a lock freezes,
try to thaw it with a heated key. Carefully
use the heated key to avoid an injury.
Use approved window washer anti-
freeze solution in system
To prevent the window washer from
being frozen, add authorized window
washer anti-freeze solution, as specified
on the window washer container.
Window washer anti-freeze solution is
available from an authorized HYUNDAI
dealer, and most vehicle accessory
outlets. Do not use engine coolant or
other types of anti-freeze solution, to
prevent any damage to the vehicle paint.

Driving your vehicle
6-58
Do not let your parking brake freeze
Under some conditions your parking
brake can freeze in the engaged position.
This is most likely to happen when there
is an accumulation of snow or ice around
or near the rear brakes or if the brakes
are wet. When there is the risk that your
parking brake may freeze, temporarily
apply it with the gear in P (Park). Also,
block the rear wheels in advance, so the
vehicle may not roll. Then, release the
parking brake.
Do not let ice and snow accumulate
underneath
Under some conditions, snow and ice
can build up under the fenders and
interfere with the steering. When driving
in such conditions during the severe
winter, you should check underneath
the vehicle on a regular basis, to ensure
that the front wheels and the steering
components is unblocked.
Carry emergency equipment
In accordance with weather conditions,
you should carry appropriate emergency
equipment, while driving. Some of the
items you may want to carry include tire
chains, tow straps or chains, flashlight,
emergency flares, sand, shovel, jumper
cables, window scraper, gloves, ground
cloth, coveralls, blanket, etc.
Do not place objects or materials in the
engine compartment
Putting objects or materials in the engine
compartment may cause an engine
failure or combustion, because they may
block the engine cooling. Such damage
will not be covered by the manufacturer’s
warranty.