2021 HYUNDAI TUCSON HYBRID engine

Convenient features
5-88
interior lights
WARNING
Do not use the interior lights when
driving in the dark. The interior lights
may obscure your view and cause an
accident.
NOTICE
Do not use the interior lights for
extended periods when the vehicle is
turned off or the battery will discharge.
Interior Lamp AUTO OFF
The interior lamps will automatically go
off approximately 10 minutes after the
vehicle is turned off and the doors are
closed. If a door is opened, the lamp
will go off 40 minutes after the vehicle
is turned off. If the doors are locked by
the smart key and the vehicle enters the
armed stage of the theft alarm system,
the lamps will go off five seconds later.
Front lamps
ONX4H050006N
Front room lamp (1) :
Press the button to turn ON the room
lamp for the front/rear seats.
Front Door Lamp (2) (
):
The front or rear room lamps come on
when the front or rear doors are opened
if the engine is running or not. When
doors are unlocked by the remote key or
smart key, the front and rear lamps come
on for approximately 30 seconds as long
as any door is not opened. The front and
rear room lamps go out gradually after
approximately 30 seconds when the door
is closed. However, if the ignition switch
is in the ON position or all doors are
locked, the front and rear lamps will turn
off. If a door is opened with the ignition
switch in the ACC position or the OFF
position, the front and rear lamps stay on
for about 20 minutes.
Front Map Lamp (3):
Press either lenses to turn the map lamp
on or off. This light produces a spot
beam for convenient use as a map lamp
at night or as a personal lamp for the
driver and the front passenger.

05
5-93
AUTO Wiper Control (if equipped)
ONX4EH050002
The rain sensor located on the upper
end of the windshield glass senses
the amount of rainfall and controls the
wiping cycle for the proper interval.
The wiper operation time will be
automatically controlled depends on
rainfall.
When the rain stops, the wiper stops.
To vary the sensitivity setting, turn the
sensitivity control knob.
If the wiper switch is set in AUTO mode
when the Engine Start/Stop button is in
the ON position, the wiper will operate
once to perform a self-check of the
system. Set the wiper to the OFF position
when the wiper is not in use.
WARNING
To avoid personal injury from the
windshield wipers, when the engine
is running and the windshield wiper
switch is placed in the AUTO mode:
• Do not touch the upper end of the
windshield glass facing the rain
sensor.
• Do not wipe the upper end of the
windshield glass with a damp or wet
cloth.
• Do not put pressure on the
windshield glass.
NOTICE
• When washing the vehicle, set the
wiper switch in the OFF position to
stop the auto wiper operation. The
wiper may operate and be damaged
if the switch is set in the AUTO mode
while washing the vehicle.
• Do not remove the sensor cover
located on the upper end of the
passenger side windshield glass.
Damage to system components
could occur and may not be covered
by your vehicle warranty.
• Because of using a photo sensor,
temporary malfunction could occur
according to sudden ambient light
change made by stone and dust
while driving.

Convenient features
5-94
Front windshield washers
ONX4050044
In the OFF (O) position, pull the lever
gently toward you to spray washer fluid
on the windshield and to run the wipers
1-3 cycles. The spray and wiper operation
will continue until you release the lever. If
the washer does not work, you may need
to add washer fluid to the washer fluid
reservoir.
Recirculating air when washer fluid
is used
When washer fluid is used, in order to
reduce any objectionable scent of the
washer fluid from entering the cabin,
recirculation mode and air conditioning
are automatically activated depending
on the outside temperature. If you
select fresh mode while the function is
operating, the function will resume after
a certain amount of time. It may not work
in some conditions such as cold weather
or engine OFF.
For more details, refer to “Climate
Control Additional Features” section in
this chapter.
WARNING
When the outside temperature is below
freezing, ALWAYS warm the windshield
using the defroster to help prevent
the washer fluid from freezing on the
windshield and obscuring your vision
which could result in an accident and
serious injury or death.
NOTICE
• To prevent possible damage to the
washer pump, do not operate the
washer when the fluid reservoir is
empty.
• To prevent possible damage to the
wipers or windshield, do not operate
the wipers when the windshield is
dry.
• To prevent damage to the wiper
arms and other components, do
not attempt to move the wipers
manually.
• To prevent possible damage to the
wipers and washer system, use anti-
freezing washer fluids in the winter
season or cold weather.

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
5-103
Information
Using the system in the fresh air position is
recommended.
Prolonged operation of the heater in the
recirculated air position (without air
conditioning selected) can cause fogging of
the windshield and side windows and the
air within the passenger compartment will
become stale.
In addition, prolonged use of the air
conditioning with the recirculated air
position selected will result in excessively
dry air in the passenger compartment.
WARNING
• Continued climate control system
operation in the recirculated air
position may allow humidity to
increase inside the vehicle which
may fog the glass and obscure
visibility.
• Do not sleep in a vehicle with the air
conditioning or heating system on. It
may cause serious harm or death due
to a drop in the oxygen level and/or
body temperature.
• Continued climate control system
operation in the recirculated air
position can cause drowsiness
or sleepiness, and loss of vehicle
control. Set the air intake control
to the outside (fresh) air position as
much as possible while driving.
Fan speed control
ONX4H050107
The fan speed can be set as desired by
pushing the fan speed control button.
Increased air flow is delivered with
higher fan speeds.
Pressing the OFF button turns off the fan.
NOTICE
Operating the fan when the ignition
switch is in the ON position could cause
the battery to discharge. Operate the
fan when the engine is running.

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 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.

Convenient features5-112
Rear window defrosterNOTICE
To prevent damage to the rear window
defroster conducting elements bonded
to the inside surface of the rear window,
never use sharp instruments or window
cleaners containing abrasives to clean
the window.
The defroster heats the
window to remove frost, fog
and thin ice from the interior
and exterior of the rear
window, while the engine is
running.
• To activate the rear window defroster,
press the rear window defroster
button located in the center control
panel. The indicator on the rear
window defroster button illuminates
when the defroster is ON.
• To turn off the defroster, press the rear
window defroster button again.
Information
• If there is heavy accumulation of snow
on the rear window, brush it off before
operating the rear defroster.
• The rear window defroster
automatically turns off after
approximately 20 minutes or when the
Engine Start/Stop button is in the OFF
position.
Side view mirror defroster (if
equipped)
If your vehicle is equipped with the side
view mirror defrosters, they will operate
at the same time you turn on the rear
window defroster.