heating HYUNDAI SONATA 2021 User Guide

05
5-135
System Operation
Cooling / Ventilation
1. Select the Face Level mode.
2.

Se

t the air intake control to fresh
mode.
3.

Se

t the temperature control to the
desired position.
4.
Se

t the fan speed control to the
desired speed.
Heating
1. Select the Floor L evel mode.
2.

Se

t the air intake control to fresh
mode.
3.

Se

t the temperature control to the
desired position.
4.
Se

t the fan speed control to the
desired speed.
5.

If desir

ed, turn the air conditioning ON
with the temperature control knob set
to heat in order to dehumidify the air
before it enters into the cabin.
If the windshield fogs up, select the Floor
& Defrost
mode or press the Front
Defrost mode.
Operation Tips
• To keep dust or unpleasant fumes
from entering the car through the
ventilation system, temporarily set the
air intake control to the recirculation
mode. Return the control to the to
Fresh mode when the unpleasant air
outside has diminished. This will help
keep the driver alert and comfortable.
• To help prevent the inside of the
windshield from fogging, set the air
intake control to fresh mode and the
fan speed to the desired position, turn
on the air conditioning system, and
adjust the temperature control to the
desired temperature.
Air conditioning
Your HYUNDAI vehicle air conditioning
system is filled with R-1234yf refrigerant.
1.

S
tart the engine.
2.

Pr
ess the air conditioning button.
3.

Se
t the mode to the Face Level

mode.
4.
Se

t the air intake control to
Recirculation mode temporarily to
allow the cabin to cool quickly. When
the desired temperature in the cabin
is reached, change the air intake
control back to Fresh mode.
5.

A

djust the fan speed control and
temperature control to maintain
maximum comfort.
When maximum cooling is desired, set
the temperature control to the MAX A/C
position, then set the fan speed control
to the highest setting.
NOTICE
When using the air conditioning system,
monitor the engine temperature gauge
closely while driving up hills or in heavy
traffic when outside temperatures.
Air conditioning system operation
when climbing a steep grade or in
high outside ambient temperatures
can cause engine overheating.
Continue to use the fan, but turn the air
conditioning system off if the engine
temperature gauge indicates engine
overheating.

Convenient Features
5-136
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 only for a few minutes
to ensure maximum system
performance.
• If you operate 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 knob
or button to the
position and fan
speed control to the lower speed.
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.
Have the cabin air filter 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
cabin air filter inspections and changes
are required.
If the air flow rate suddenly decreases,
the system should be checked at an
authorized HYUNDAI dealer.

Convenient Features
5-138
WinDshielD De F rosting A n D De Fogging
WARNING
Windshield heating
Do not use the
or 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 knob or button to the

position and fan speed control knob or
button to a lower speed.
• For maximum defrost performance,
set the temperature control knob
to the highest temperature setting
(rotated all the way to the right) 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 you start the vehicle when the
weather is cold, more adequate way to
heat the cabin is described below.
1.

T
urn off or lower the blower, right
after engine starting, because
engine temperature is still low and
the air flow is cold.
2.

A
fter few minutes of engine warm
up, turn the blower to low to medium
speed and set the temperature
control to Hot.
Manual Climate Control System
To defog inside windshield
ODN8A059125
[A] : Type A, [B] : Type B
1. Select an y fan speed except “0”
position.
2.

Select desir
ed temperature.
3.

Select the or position.
4.

F

resh mode air will be selected
automatically. Additionally, the
air conditioning (if equipped) will
automatically operate if the mode is
selected to the
position.
If the air conditioning and fresh mode
are not selected automatically, press the
corresponding button manually.

6-18
Good Driving Practices
• Never shift the gear from P (Park) or
N (Neutral) to any other position with
the accelerator pedal depressed.
• Never shift the gear into P (Park) when
the vehicle is in motion.
Be sure the vehicle is completely
stopped before you attempt to shift
into R (Reverse) or D (Drive).
• Do not shift the gear to N (Neutral)
when driving. Doing so may result
in an accident because of a loss of
engine braking and the transmission
could be damaged.
• While driving up or downhill, check
the gear position, indicated on the
cluster, to ensure the vehicle is
driving forward while in D (Drive), or
backward while in R (Reverse).
If y

ou drive in the opposite direction
of the selected gear, the engine will
turn off and a serious accident may
occur due to the degraded brake
performance.
• Do not drive with your foot resting
on the brake pedal. Even light, but
consistent pedal pressure can result
in the brakes overheating, brake wear
and possibly even brake failure.
• When driving in the manual shift
mode, slow down before shifting to a
lower gear. Otherwise, the lower gear
may not be engaged if the engine
rpms are outside of the allowable
range.
• Always apply the parking brake when
leaving the vehicle. Do not depend on
placing the transmission in P (Park) to
keep the vehicle from moving. •
Exercise extreme caution when
driving on a slippery surface. Be
especially careful when braking,
accelerating or shifting gears. On a
slippery surface, an abrupt change
in vehicle speed can cause the drive
wheels to lose traction and may cause
loss of vehicle control resulting in an
accident
• Optimum vehicle performance and
economy is obtained by smoothly
depressing and releasing the
accelerator.
While Driving

6-32
WARNING
If ESC indicator light () or EPS
warning light () stays on or blinks,
your vehicle may have a malfunction
with the VSM system. When the
warning light illuminates, have your
vehicle checked by an authorized
HYUNDAI dealer as soon as possible.
Driving with wheels and tires with
different sizes may cause the ESC system
to malfunction. Before replacing tires,
make sure all four tires and wheels are
the same size. Never drive the vehicle
with different sized tires and wheels
installed.
Hill-Start Assist Control (HAC)
The Hill-Start Assist Control (HAC)
helps prevent the vehicle from rolling
backwards when starting a vehicle from
a stop on a hill. The system operates the
brakes automatically for approximately
2 seconds and releases the brake after 2
seconds or when the accelerator pedal is
depressed.
WARNING
Always be ready to depress the
accelerator pedal when starting off on
a incline. The HAC activates only for
approximately 2 seconds.
NOTICE
• The HAC does not operate when
the shift button is in P (Park) or N
(Neutral)
• The HAC activates even though the
ESC (Electronic Stability Control) is
off but does not activate when the
ESC has malfunctioned.
Good Braking Practices
WARNING
Whenever leaving the vehicle or
parking, always come to a complete
stop and continue to depress the brake
pedal. Move the shift button into P
(Park) position, then apply the parking
brake, and place the ignition switch in
the LOCK/OFF position.
Vehicles parked with the parking brake
not applied or not fully engaged may
roll inadvertently and may cause injury
to the driver and others. ALWAYS apply
the parking brake before exiting the
vehicle.
Wet brakes can be dangerous! The
brakes may get wet if the vehicle is
driven through standing water or if it
is washed. Your vehicle will not stop as
quickly if the brakes are wet. Wet brakes
may cause the vehicle to pull to one side.
To dry the brakes, apply the brakes
lightly until the braking action returns to
normal, taking care to keep the vehicle
under control at all times. If the braking
action does not return to normal, stop
as soon as it is safe to do so and call
an authorized HYUNDAI dealer for
assistance.
DO NOT drive with your foot resting on
the brake pedal. Even light, but constant
pedal pressure can result in the brakes
overheating, brake wear, and possibly
even brake failure.
If a tire goes flat while you are driving,
apply the brakes gently and keep the
vehicle pointed straight ahead while you
slow down. When you are moving slowly
enough for it to be safe to do so, pull off
the road and stop in a safe location.
Keep your foot firmly on the brake pedal
when the vehicle is stopped to prevent
the vehicle from rolling forward.
While Driving

6-34
When the system is deactivated:
ODN8069019
The ISG OFF button indicator illuminates.
If the message "Auto Stop is Off.
OIK057173N
Start vehicle manually", appears on the
LCD display with a beep sound, restart
the vehicle manually by depressing the
brake pedal with the vehicle shifted
to P (Park) or N (Neutral). For your
safety, restart the vehicle in the P (Park)
position.
Auto start
To restart the engine in the auto stop
mode
Release the brake pedal.
- When Auto Hold is activated, if you release the brake pedal, the engine will
be in the auto stop state. However, if
you depress the accelerator pedal, the
engine will start again.
The auto stop indicator () goes OFF on
the instrument cluster, when the engine
is restarted.
The engine is automatically restarted in
the following situations.
• The brake vacuum pressure is low
• The engine has stopped for about 5
minutes
• The air conditioning is ON with the fan
speed set to the highest position
• The front defroster is ON
• The battery is weak
• The cooling and heating performance
of the climate control system is
unsatisfactory
• The vehicle is shifted to P (Park) when
Auto Hold is activated
• The door is opened or the seatbelt
is unfastened when Auto Hold is
activated
• The EPB switch is pressed when Auto
Hold is activated
The auto stop indicator (
) blinks in
green for 5 seconds on the instrument
cluster.
While Driving

6-140
Hazardous Driving Conditions
When hazardous driving elements
are encountered such as water, snow,
ice, mud and sand, take the below
suggestions:
• Drive cautiously and keep a longer
braking distance.
• Avoid abrupt braking or steering.
• When your vehicle is stuck in
snow, mud, or sand, use second
gear. Accelerate slowly to avoid
unnecessary wheel spin.
• Put sand, rock salt, tire chains or other
non-slip materials under the wheels to
provide additional traction while the
vehicle becomes stuck in ice, snow,
or mud.
WARNING
Downshifting with an automatic
transmission while driving on slippery
surfaces can cause an accident. The
sudden change in tire speed could
cause the tires to skid. Be careful when
downshifting on slippery surfaces.
Rocking the Vehicle
If it is necessary to rock the vehicle to
free it from snow, sand, or mud, first turn
the steering wheel right and left to clear
the area around your front wheels. Then,
shift back and forth between R (Reverse)
and a forward gear.
Try to avoid spinning the wheels, and do
not race the engine.
To prevent transmission wear, wait until
the wheels stop spinning before shifting
gears. Release the accelerator pedal
while shifting, and press lightly on the
accelerator pedal while the transmission
is in gear. Slowly spinning the wheels in
forward and reverse directions causes a
rocking motion that may free the vehicle.
WARNING
If the vehicle is stuck and excessive
wheel spin occurs, the temperature
of the tires can increase very quickly.
If the tires become damaged, a tire
blow out or tire explosion can occur.
This condition is dangerous - you and
others may be injured. Do not attempt
this procedure if people or objects are
anywhere near the vehicle.
If you attempt to free the vehicle, the
vehicle can overheat quickly, possibly
causing an engine compartment fire
or other damage. Try to avoid spinning
the wheels as much as possible to
prevent overheating of either the tires
or the engine. DO NOT allow the vehicle
to spin the wheels above 35 mph (56
km/h).
Information
The ESC system must be turned OFF
before rocking the vehicle.
NOTICE
If you are still stuck after rocking the
vehicle a few times, have the vehicle
pulled out by a tow vehicle to avoid
engine overheating, possible damage to
the transmission, and tire damage. See
"Towing" in chapter 7.
SpeCI al d r I v I n G Cond I t I on S
While Driving

Emergency Situations
7-6
If your temperature gauge indicates
overheating, you experience a loss of
power, or hear loud pinging or knocking,
the engine may be overheating. If this
happens, you should:
1.
Pull o
ff the road and stop as soon as it
is safe to do so.
2.

Place the shift butt
on in P (Park)
and set the parking brake. If the air
conditioning is ON, turn it OFF.
3.

If engine coolan
t is running out under
the vehicle or steam is coming out
from the hood, stop the engine. Do
not open the hood until the coolant
has stopped running or the steaming
has stopped. If there is no visible
loss of engine coolant and no steam,
leave the engine running and check
to be sure the engine cooling fan is
operating. If the fan is not running,
turn the engine off.
WARNING
While the engine is running,
keep hands, clothing and tools
away from the moving parts
such as the cooling fan and
drive belt to prevent serious
injury.
4.
Check f

or coolant leaking from the
radiator, hoses or under the vehicle. (If
the air conditioning had been in use, it
is normal for cold water to be draining
from it when you stop.)
5.

If engine coolan
t is leaking out, stop
the engine immediately and call the
nearest authorized HYUNDAI dealer
for assistance.
WARNING
Your vehicle is equipped
with a pressurized coolant
reserve tank. NEVER remove
the engine coolant reservoir
tank/radiator cap or the drain
plug while the engine and
radiator are HOT. Hot coolant
and steam may blow out under
pressure, causing serious
injury.
Turn the engine off and wait until the
engine cools down. Use extreme care
when removing the engine coolant
reservoir tank/radiator cap. Wrap
a towel or thick rag around it, and
turn it counterclockwise slowly to
release some of the pressure from the
system. Step back while the pressure is
released.
When you are sure all the pressure has
been released, continue turning the cap
counterclockwise to remove it.
6.

If y

ou cannot find the cause of the
overheating, wait until the engine
temperature has returned to normal.
Then, if coolant has been lost,
carefully add coolant to the reservoir
to bring the fluid level in the reservoir
up to the halfway mark.
7.
Pr

oceed with caution, keeping alert
for further signs of overheating. If
overheating happens again, call
an authorized HYUNDAI dealer for
assistance.
CAUTION
Serious loss of coolant indicates a
leak in the cooling system and should
be checked as soon as possible by an
authorized HYUNDAI dealer.
If the engIne overhea ts

Index
I-2
A
Air bag warning labels

........................................................................\
................. 3-57
Air bags
........................................................................\
........................................ 3-37
Driver’s air bag
........................................................................\
....................... 3-39
Passenger’s front air bag


........................................................................\
......... 3-39
Side air bags


........................................................................\
............................ 3-40
Curtain air bags


........................................................................\
....................... 3-41
How does the air bags system operate?........................................................... 3-42
SRS components and functions


....................................................................... 3-42
SRS warning light
........................................................................\
................... 3-43
What to expect after an air bag inflates


...........................................................3-46
Occupant Classification System (OCS)
.......................................................... 3-47
Why didn’

t my air bag go off in a collision

....................................................3-52
Air bag collision sensors


........................................................................\
......... 3-53
Air bag inflation conditions


........................................................................\
.... 3-54
Air bag non-inflation conditions


..................................................................... 3-54
SRS Care
........................................................................\
................................. 3-56
Additional safety precautions


........................................................................\
.. 3-57
Air bag warning labels


........................................................................\
............ 3-57
Air cleaner


........................................................................\
................................... 8-26
Air cleaner filter replacement


........................................................................\
...... 8-26
Air conditioning system specification


................................................................. 2-10
Antenna
........................................................................\
...................................... 5-152
Anti-lock Brake System (ABS)


........................................................................\
... 6-27
Appearance care........................................................................\
........................... 8-63 Exterior care


........................................................................\
............................ 8-63
Interior care


........................................................................\
............................. 8-67
Armrest
........................................................................\
........................................ 3-11
Audio / Video / Navigation system
.................................................................... 5-154
Auto defogging system
........................................................................\
.............. 5-141
AUT

O headlamp position

........................................................................\
............ 5-74
Auto LOCK - Enable on shift


........................................................................\
...... 5-34
Auto LOCK - Enable on speed


........................................................................\
.... 5-34
Auto UNLOCK - Enable on shift
........................................................................\
5-34
Auto UNLOCK -Air bag deployment

................................................................. 5-34
Automatic climate control system


..................................................................... 5-127
Automatic heating and air conditioning


........................................................5-128
Manual temperature control mode


................................................................ 5-129

Index
I-12
Manual climate control system ........................................................................\
.. 5-118
Heating and air conditioning

........................................................................\
. 5-119
Mode selection


........................................................................\
...................... 5-120
Instrument panel vents


........................................................................\
.......... 5-122
Temperature control


........................................................................\
.............. 5-122
Air intake control


........................................................................\
.................. 5-122
Fan speed control


........................................................................\
.................. 5-123
Air conditioning


........................................................................\
.................... 5-123
System operation


........................................................................\
................... 5-124
System maintenance


........................................................................\
.............. 5-125
Air conditioning refrigerant label.................................................................. 5-126
Mirrors
........................................................................\
......................................... 5-46
Inside rearview mirror


........................................................................\
............. 5-46
HomeLink
® system........................................................................\
.................. 5-47
Side view mirrors

........................................................................\
.................... 5-53
Adjusting the side view mirrors


...................................................................... 5-54
Folding the side view mirrors


........................................................................\
. 5-54
Reverse parking aid function


........................................................................\
.. 5-55
N
Navigation-based Smart Cruise Control (NSCC)


..............................................6-112
O
Occupant Classification System (OCS)


............................................................... 3-47
Odometer
........................................................................\
....................................... 4-5
Oil (Engine)


........................................................................\
................................. 8-19
Outside temperature gauge


........................................................................\
............ 4-5
Owner maintenance


........................................................................\
....................... 8-5
P
Panoramic sunroof
........................................................................\
....................... 5-60
Parking lamp position


........................................................................\
.................. 5-75
Passenger’s front air bag


........................................................................\
.............. 3-39
Power brakes

........................................................................\
................................ 6-20
Power outlet
........................................................................\
............................... 5-146
Power window lock switch

........................................................................\
.......... 5-59
Pre-tensioner seat belt


........................................................................\
.................. 3-24
Retractor pretensioner


........................................................................\
............. 3-24