2021 HYUNDAI TUCSON HYBRID climate control

05
5-111
To defrost outside windshield
ONX4H050101
„„ Type A„„ Type B
1. Set fan speed to the highest position.
2.
Set t
emperature to the extreme hot
(HI) position.
3.
Press the de

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

ding to the detected
ambient temperature and outside
(fresh) air position will be selected
automatically.
If the
position is selected, lower fan
speed is controlled to higher fan speed.
Auto Defogging System
on Models with Automatic
Temperature Control
Auto defogging reduces the possibility of
fogging up the inside of the windshield
by automatically sensing the moisture on
inside the windshield.
The auto defogging system operates
when the heater or air conditioning is on.
Information
The auto defogging system may not
operate normally, when the outside
temperature is below 14°F (-10°C).
To cancel or set the Auto Defogging
System, keep the front defroster button
pressed for 3 seconds. The “ADS OFF”
symbol will be shown in the climate
display to inform you that the system
is deactivated. To re-activate the auto
defogging system, follow the procedure
mentioned above and the “ADS OFF”
symbol will disappear.
If the battery has been disconnected
or discharged, it resets to the auto
defogging status.
Information
For efficiency, do not select recirculated
air position while the Auto defogging
system is operating.
NOTICE
Do not remove the sensor cover located
on the top of the windshield glass.
Damage to system parts could occur
and may not be covered by your vehicle
warranty.

05
5-113
ClImaTe ConTrol addITIonal feaTUres
Auto Defogging System
on Models with Automatic
Temperature Control
ONX4050046
Auto defogging helps reduce the
possibility of fogging up the inside of the
windshield by automatically sensing the
moisture on inside the windshield.
The auto defogging system operates
when the heater or air conditioning is on.
Information
The auto defogging system may not
operate normally, when the outside
temperature is below 14 °F (-10 °C).
When the Auto Defogging
System operates, the indicator
will illuminate.
If a high amount of humidity is detected
in the vehicle, the Auto Defogging
System will be enabled. The following
steps will be performed automatically:
Step 1) Air conditioning will turn ON.
Step 2) Air intake control will change to Fresh mode.
Step 3) Mode will change to defrost to direct airflow to the windshield.
Step 4) Fan speed will be set to MAX.
If the air conditioning is off or
recirculation mode is manually selected
while Auto Defogging System is ON, the
Auto Defogging System indicator will
blink 3 times to signal that the manual
operation has been canceled.

Convenient features
5-114
Turning the Auto Defogging System
ON or OFF
Climate control system
Press the front windshield defroster
button for 3 seconds when the Engine
Start/Stop button is in the ON position.
When the Auto Defogging System is
turned off, the ADS OFF symbol will blink
3 times and ADS OFF will be displayed on
the climate control information screen.
When the Auto Defogging System is
turned on, the ADS OFF symbol will blink
6 times without a signal.
Infotainment system
Auto Defogging System can be turned
on
and o
ff
b
y
selecting ‘Se
tup
→ Vehicle Se

ttings
→ Clima
te
→ De
fog/
Defrost
Op

tions
→ A
uto
De
fog’
fr
om
the inf

otainment system screen.
For detailed information, refer to the
separately supplied infotainment
system manual.
Information
• When the air conditioning is turned
on by Auto Defogging System, if you
try to turn off the air conditioning, the
indicator will blink 3 times and the air
conditioning will not be turned off.
• To maintain the effectiveness and
efficiency of the Auto Defogging
System, do not select Recirculation
mode while the system is operating.
• When Auto Defogging System is
operating, fan speed adjustment,
temperature adjustment, and air intake
control selection are all disabled.
NOTICE
Do not remove the sensor cover located
on the upper end of the windshield
glass.
Damage to system parts could occur
and may not be covered by your vehicle
warranty.
Auto dehumidify (if equipped)
To increase cabin air quality and reduce
windshield misting, recirculation mode
switches off automatically after about 5
to 30 minutes, depending on the outside
temperature, and the air intake will
change to fresh mode.
Turning Auto Dehumidify ON or OFF
Climate control system
To turn the Auto Dehumidify feature
on or off, select Face level (
) mode
and press the air intake control ()
button at least five times within three
seconds. When Auto Dehumidify is
turned on, the air intake control button
indicator will blink 6 times. When turned
off, the indicator will blink 3 times.
Infotainment system
Auto Dehumidify can be turned on and
off
b

y
selecting ‘Se

tup
→ V

ehicle
Se

ttings
→ Clima

te
→ A

utomatic
V

entilation
→ Aut

o Dehumidify’ from the infotainment
system screen.
For detailed information, refer to the
separately supplied infotainment
system manual.

05
5-115
Recirculating air when washer
fluid is used
Recirculation mode automatically
activates to reduce any objectionable
scent of the washer fluid from entering
the cabin when the windshield washer is
used.
When it is shifted to the recirculation
mode, the unpleasant scent may flow
into the vehicle.
However, In cold whether to prevent
the windshield from fogging up, the
recirculation mode may not be selected.
Turning Activate upon Washer Fluid
Use ON or OFF
Climate control system
To turn the Activate upon Washer Fluid
Use feature on or off, select Floor level
(
) mode, and then press the air
intake control () button four times
within two seconds while pressing the
A/C icon.
When Activate upon Washer Fluid Use
ON is turned on, the air intake control
button indicator will blink 6 times. When
turned off, the indicator will blink 3
times.
Infotainment system
Activate upon Washer Fluid Use can be
turned
on and o

ff
b

y
selecting ‘Se
tup
→ Vehicle Se

ttings
→ Clima
te
→ R
ecirculate
Air → A

ctivate
upon W
asher
Fluid U
se
(or In

terlocking washer fluid)’ from the
infotainment system screen.
For detailed information, refer to the
separately supplied infotainment
system manual.
Sunroof inside air recirculation
(if equipped)
When the sunroof is opened, fresh
mode will be automatically selected.
At this time, if you press the air intake
control button, recirculation mode will
be selected but will change back to fresh
mode after 3 minutes. When the sunroof
is closed, the air intake position will
return to the original position that was
selected.
Automatic Controls for the
Driver Based on Climate Control
System Settings
The temperature of the driver’s seat
warmer, air ventilated seat and heated
steering wheel is automatically
controlled depending on the inside and
outside temperature of the vehicle when
the engine is running.
To use these features, it must be
enabled from the Settings menu in the
infotainment system screen. Select:
- Setup → V

ehicle
Se
ttings
→ Sea
t
→ Hea

ted/Ventilated
F
eatures
→ H
eated/
Ventilated
F

eatures
→ A
uto.
Con
trols
That U

se Climate Control Settings
For more details on Auto Comfort
Control, refer to “Seat Warmers” and
“Air ventilation seats” section in chapter
3 and “Heated Steering Wheel” section
in chapter 5.

08
8-5
if tHe 12 volt Battery is discHar ged
Before Jump Starting
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.
Using the 12V battery reset switch
ONX4HQ010015
1. Press the 12V Battery Reset switch to
r
econnect the 12V battery.
2.
Start the v

ehicle within 15 seconds of
pressing the 12V Battery Reset switch.
3.
Aft

er 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. If you do not start the vehicle
immediately after pressing the 12V
Battery Reset switch, the power of 12V
battery is automatically disconnected
after few seconds to save the 12V battery
from additional discharge. If the 12V
battery is disconnected prior to starting
the vehicle, press the 12V Battery Reset
switch again and then immediately start
the vehicle as explained.
Repeated use of the 12V Battery Reset
switch without a sufficient engine
ON cycle (30 Min+) may cause over
discharge of the 12V battery, which will
prevent the vehicle from starting. If the
12V battery is over discharged to a point
that the reset does not work, try to jump-
start the vehicle.
Information
After starting the vehicle
( indicator on), the 12V battery is being
charged whether the engine is running or
not. Although there is no engine sound, it
is unnecessary to depress the accelerator
pedal.
The following items may need to be reset
after the battery has been discharged or
the battery has been disconnected.
See chapter 4 and 5 for:
• Power Windows
• Trip Computer
• Climate Control System
• Clock
• Audio System
• Sunroof

Maintenance
9-8
The following maintenance services must be performed to ensure good emission control and performance.
Keep receipts for all vehicle emission services to protect your warranty. Where both mileage and time are shown, the frequency of
service is determined by whichever occurs first.
MAINTENANCE INTERVALS
MAINTENANCE
ITEM Number of months or driving distance, whichever comes first
Months 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 Milesx1,000 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120Kmx1,000 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195
HSG belts
*1
Inspect every 8,000 miles (13,000 km) or 12 months,
and replace every 56,000 miles(90,000 km) or 84 months
Engine oil and engine oil filter
*2 *3
R R R R R R R R R R R R R R R
Fuel additives
*4
Add every 8,000 miles (13,000 km) or 12 months
Air cleaner filter I I R I I R I I R I I R I I R
Spark plugs Replace every 46,000 miles (75,000 km)
Rotate tires Rotate tires every 8,000 miles (13,000 km)
Climate control air filter I R I R I R I R I R I R I R I
Vacuum hose I I I I I I I I I I I I I I I
Engine coolant / Inverter coolant At first, replace at 80,000 miles (130,000 km) or 10 years.
After that, replace every 24,000 miles (39,000 km) or 24 months
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.*1 : The drive belt should be replaced when cracks occur or tension is reduced excessively.
*2 : Requires API SN PLUS (or above) grade engine oil. If a lower grade engine oil is used, then the engine oil and engine oil filter
must be replaced at every 5,000 miles (8,000 km) or 6 months as indicated for severe maintenance condition.
*3 : As it is normal for engine oil to be consumed during driving, the amount of engine oil should be checked regularly.
*4 : If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from your
authorized HYUNDAI dealer along with information on how to use them. Do not mix other additives.
Normal Maintenance Schedule

Maintenance
9-12
Maintenance itemMaintenance
operation Maintenance Intervals Driving
condition
Driveshaft and boots IEvery 5,000 miles
(8,000 km) or 6 months C, D, E, F, G,
H, I, J
Drive shaft IInspect more frequently
depending on the condition C, D, E, F, G,
H, I, J
Climate control air filter
(for evaporator and blower
unit) RReplace more
frequently depending on the condition C, E
Rear differential oil (AWD) RReplace every 72,000
miles (120,000 km) C, D, E, G, H,
I, J
Transfer case oil (AWD) RReplace every 72,000
miles (120,000 km) C, D, E, G, H,
I, J
Severe driving conditions
A. Repeatedly driving short distance of less than 5 miles (8 km) in normal temperature
or less than 16 miles (10 km ) in freezing temperature
B.
Extensiv

e engine idling or low speed driving for long distances
C.
Driving on rough, dus

ty, muddy, unpaved, graveled or salt spread roads
D.
Driving in areas using salt or o

ther corrosive materials or in very cold weather
E.
Driving in heavy dus

t conditions
F.
Driving in heavy tr

affic area
G.
Driving on uphill, downhill, or moun

tain roads repeatedly
H.
Using f

or towing or camping, and driving with loading on the roof
I.
Driving as a patr

ol car, taxi, other commercial use or vehicle towing
J.
Fr

equently driving under high speed or rapid acceleration
K.
Fr

equently driving in stop-and-go conditions
L.
Engine oil usage which is no

t recommended(mineral type, semi-synthetic, lower
grade, etc.)

09
9-21
washEr fluid
Checking the washer fluid level
ONX4H090010
Check the fluid level in the washer fluid
reservoir and add fluid if necessary.
Plain water may be used during summer
months if washer fluid is not available.
However, use washer solvent with
antifreeze characteristics in cold climates
to prevent freezing.
WARNING
To prevent serious injury or death, take
the following safety precautions when
using washer fluid:
• Do not use engine coolant or
antifreeze in the washer fluid
reservoir. Engine coolant can
severely obscure visibility when
sprayed on the windshield and
may cause loss of vehicle control
resulting in an accident or damage to
paint and body trim.
• Do not allow sparks or flame to
contact the washer fluid or the
washer fluid reservoir. Washer fluid
may contain alcohol and can be
flammable.
• Do not drink washer fluid and avoid
contact with skin. Washer fluid is
harmful to humans and animals.
• Keep washer fluid away from
children and animals.
WARNING
Do not allow brake fluid to come in
contact with your eyes. If brake fluid
comes in contact with your eyes, flush
your eyes with clean water for at least
15 minutes and get immediate medical
attention.
NOTICE
• Do not allow brake fluid to contact
the vehicle’s body paint, as paint
damage will result.
• Brake fluid, which has been exposed
to open air for an extended time
should NEVER be used as its quality
cannot be guaranteed. It should be
disposed of properly.
• Do not use the wrong kind of brake
fluid. A few drops of mineral based
oil, such as engine oil, in your brake
system can damage brake system
parts.
Information
Use only the specified brake fluid (refer
to “Recommended Lubricants and
Capacities” section in chapter 2).