2020 Hyundai Sonata ECU

Convenient Features5-32
In case of an emergency
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If the electrical power door lock switch
is not operating (ex. dead car battery)
the only way to lock the door(s) is with
the mechanical key from the outside key
hole.
Doors without an outside key hole can be
locked as follows:
1. Open the door.
2. Insert the key into the emergency door lock hole and turn the key
horizontally to lock.
3. Close the door securely.
Information
If the electrical power to door lock switch
is not operating (ex. dead car battery) and
the trunk is closed, you will not be able to
open the trunk until power is restored.
Operating Door Locks from
Inside the Vehicle
With the door handle
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Front door
If the inner door handle is pulled when
the door is lock
ed, the door will unlock
and open.
Rear door
If the inner door handle is pulled once
when the door is lock
ed, the door will
unlock. If the inner door handle is pulled
once more, the door will open.
Information
If a power door lock ever fails to function
while you are in the vehicle try one or
more of the following techniques to exit:
• Operate the door unlock feature
repeatedly (both electronic and
manual) while simultaneously pulling
on the door handle.
• Operate the other door locks and
handles, front and rear.
• Lower a front window and use the
mechanical key to unlock the door from
outside.

05
5-33
With the central door lock switch
Driver’s doorDriver’s door
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Front passenger’s doorFront passenger’s door
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• When pressing the () portion (1) of
the switch, all vehicle doors will lock.
- If the key is in the ignition switch and any door is opened, the doors
will not lock even though the lock
button (1) of the central door lock
switch is pressed.
- If the smart key is in the vehicle and any door is opened, the doors
will not lock even though the lock
button (1) of the central door lock
switch is pressed.
• When pressing the (
) portion (2)
of the switch, all vehicle doors will
unlock.
• Doors indicating light (3) When all vehicle doors are locked, the
indicating lights on the driver’s door
and passenger’s door will turn on. If
any door is unlocked, it would go off.
WARNING
• The doors should always be fully closed and locked while the
vehicle is in motion. If the doors
are unlocked, the risk of being
thrown from the vehicle in a crash is
increased.
• Do not pull the inner door handle of the driver’s or passenger’s door while
the vehicle is moving.
WARNING
Do not leave children or animals
unattended in your vehicle. An enclosed
vehicle can become extremely hot,
causing death or serious injury to
unattended children or animals who
cannot escape the vehicle.
Children might operate features of the
vehicle that could injure them, or they
could encounter other harm, possibly
from someone gaining entry to the
vehicle.
WARNING
Always secure your vehicle.
Leaving your vehicle unlocked increases
the potential risk to you or others from
someone hiding in your vehicle.
To secure your vehicle, while depressing
the brake, move the shift button to the
P (Park) position, engage the parking
brake, and place the ignition switch
in the LOCK/OFF position, close all
windows, lock all doors, and always
take the key with you.
CAUTION
Opening a door when something is
approaching may cause damage or
injury. Be careful when opening doors
and watch for vehicles, motorcycles,
bicycles or pedestrians approaching the
vehicle in the path of the door.

Convenient Features5-38
THEFT-ALARM SYSTEM
This system helps to protect your vehicle
and valuables. The horn will sound and
the hazard warning lights will blink
continuously if any of the following
occur: - A door is opened without using the remote key or smart key.
- The trunk is opened without using the remote key or smart key.
- The engine hood is opened.
The alarm continues for 30 seconds, then
the system resets. To turn off the alarm,
unlock the doors with the remote key or
smart key.
The Theft Alarm System automatically
sets 30 seconds after you lock the doors
and the trunk. For the system to activate,
you must lock the doors and the trunk
from outside the vehicle with the remote
key or smart key or by pressing the
button on the outside of the door handle
with the smart key in your possession.
The hazard warning lights will blink and
the chime will sound once to indicate the
system is armed.
Once the security system is set, opening
any door, the trunk, or the hood without
using the remote key or smart key will
cause the alarm to activate.
The Theft Alarm System will not set if the
hood, the trunk, or any door is not fully
closed. If the system will not set, check
the hood, the trunk, or the doors are fully
closed.
Do not attempt to alter this system or
add other devices to it. Information
• Do not lock the doors until all
passengers have left the vehicle. If the
remaining passenger leaves the vehicle
when the system is armed, the alarm
will be activated.
• If the vehicle is not disarmed with the
remote key or smart key, open the
doors by using the mechanical key
and place the ignition switch in the
ON position (for remote key) or start
the engine (for smart key) by directly
pressing the ignition switch with the
smart key.
• If the system is disarmed by unlocking
the vehicle, but neither a door or the
trunk is opened within 30 seconds, the
doors will relock and the system will
rearm automatically.

Convenient Features5-48
Automatic-Dimming Night Vision Safety™
(NVS®) Mirror (if equipped)
The NVS® Mirror automatically reduces
glar
e by monitoring light levels in the
front and the rear of the vehicle. Any
object that obstructs either light sensor
will degrade the automatic dimming
control feature.
For more information regarding NVS®
mirrors and other applications, please
refer to the Gentex website:
www.gentex.com
Your mirror will automatically dim
upon detecting glare from the vehicles
traveling behind you.
The mirror defaults to the ON position
each time the vehicle is started.
Integrated HomeLink
® Wireless Control
System
The HomeLink® Wireless Control System
can replace up to three hand-held
radio-frequency (RF) transmitters with
a single built-in device. This innovative
feature will learn the radio frequency
codes of most current transmitters to
operate devices such as gate operators,
garage door openers, entry door locks,
security systems, even home lighting.
Both standard and rolling code-equipped
transmitters can be programmed by
following the outlined procedures.
Additional HomeLink® information can
be found at: www.homelink.com, www.
youtube.com/HomeLinkGentex or by
calling 1-800-355-3515.
Retain the original transmitter of the
RF device you are programming for use
in other vehicles as well as for future
HomeLink® programming. It is also
suggested that upon the sale of the
vehicle, the programmed HomeLink®
buttons be erased for security purposes.
WARNING
Before programming HomeLink® to a
garage door opener or gate operator,
make sure people and objects are out
of the way of the device to prevent
potential harm or damage. Do not
use the HomeLink® with any garage
door opener that lacks the safety
stop and reverse features required
by U.S. federal safety standards (this
includes any garage door opener model
manufactured before April 1, 1982).
A garage door that cannot detect an
object - signaling the door to stop and
reverse - does not meet current U.S.
federal safety standards. Using a garage
door opener without these features
increases the risk of serious injury or
death.
Programming HomeLink
®
Please note the following:
• When programming a garage door opener, it is advised to park the
vehicle outside of the garage.
• It is recommended that a new battery be placed in the hand-held transmitter
of the device being programmed to
HomeLink® for quicker training and
accurate transmission of the radio-
frequency signal.
• Some vehicles may require the Engine Start/Stop button to be in the
ACC (or “Accessories”) position for
programming and/or operation of
HomeLink®.
• In the event that there are still programming difficulties or questions
after following the programming steps
listed below, contact HomeLink® at:
www.homelink.com, www.youtube.
com/HomeLinkGentex or by calling
1-800-355-3515.

05
5-49
Programming
To program most devices, follow these
ins
tructions:
ODN8A059136ODN8A059136
1. Press and release (1), (2) or (3) button.
• If the indicator (4) is turned ON in Orange, go to Step 3) since it is a
new programming.
• If the indicator (4) is continuously turned ON or flashes in Green rapidly
several times, go to Step 2) since it is
a programmed button.
2. Press and hold the button you wish to program for approximately 15-
25 seconds until the LED flashes in
Orange for several times.
3. Hold the Garage Door Opener Original Transmitter near the HomeLink Mirror.
ODN8A059137ODN8A059137
4. Press the Original Transmitter button until the indicator (4) is
turned continuously ON or flashes in
Green for approximately 10 seconds
and it indicates the programing is
completed.
5. However, the indicator (4) flashes in Green continuously, but if the
garage door opener does not operate,
please continue to follow the step 6
and 7 (“Rolling Code Programming”
procedures).
6. Firmly press and release the “Learn,” “Smart,” or “Program” button while
the indicator (4) flashes in Green.
Once the button is pressed, you have
approximately 30 seconds to initiate
the next step.
Information
At the garage door opener motor, (security
gate motor, etc.) locate the “Learn,”
“Smart,” or “Program” button. This
can usually be found where the hanging
antenna wire is attached to the motor-head
unit (see the device’s manual to identify
this button). The name and color of the
button may vary by manufacturer. A
ladder and/or second person may simplify
the following steps.

05
5-63
Resetting the Sunroof
ODN8A059039ODN8A059039
The sunroof may need to be reset if the
following conditions occur:
• The battery is discharged or disconnected or the sunroof fuse has
been replaced or disconnected
• The sunroof control lever is not operating correctly
To reset the sunroof, perform the
following steps:
1. Turn the engine on and close the sunroof glass and sunshade
completely.
2. Release the control lever.
3. Push and hold the sunroof control lever (1) forward (to close the
sunshade) for about 10 seconds until
the sunroof moves slightly, then
release the control lever.
4. Push and hold the sunroof control lever forward until the sunroof
operates as follows:
TILT DOWN → SLIDE OPEN → SLIDE
CLOSE
Then, release the control lever.
When this is complete, the sunroof
system is reset.
For more information, contact an
authorized HYUNDAI dealer.
Information
If you do not reset the sunroof, it may not
work properly.
Sunroof Open Warning
(if equipped)
• If the driver turns off the engine when the sunroof is not fully closed,
the warning chime will sound for
approximately 3 seconds and the
sunroof open warning will appear on
the cluster LCD display.
• If the driver turns off the engine and opens the door when the sunroof is
not fully closed, the sunroof open
warning will appear on the cluster
LCD display until the door is closed or
the sunroof is fully closed.
Close the sunroof securely when leaving
your vehicle.

Convenient Features5-64
EXTERIOR FEATURES
Hood
Opening the hood
ODN8A059040ODN8A059040
1. Park the vehicle and set the parking brake.
2. Pull the release lever to unlatch the hood. The hood should pop open
slightly.
ODN8A059041ODN8A059041
3. Go to the front of the vehicle, raise the hood slightly, push up the secondary
latch (1) inside of the hood center
and lift the hood (2). After it has been
raised about halfway, it will raise
completely by itself.
Closing the hood
1. Before closing the hood, check in and around the engine compartment to
ensure the following:
- Any tools or other loose objects are removed from the engine room area
or hood opening area
- All glove, rags, or other combustible material is removed from the engine
compartment

- All filler caps are tightly and
correctly installed
2. Lower the hood halfway (lifted approximately 12 inches (30 cm) from
the closed position) and push down
to securely lock in place. Then double
check to be sure the hood is secure.
If the hood can be raised slightly, it is
not securely locked. Open it again and
close it with more force.
WARNING
• Before closing the hood, ensure
all obstructions are removed from
around the hood opening.
• Always double check to be sure that
the hood is firmly latched before
driving away. Check there is no
hood open warning light or message
displayed on the instrument cluster.
Driving with the hood opened may
cause a total loss of visibility, which
might result in an accident.
• Do not move the vehicle with the
hood in the raised position, as vision
is obstructed, which might result in
an accident, and the hood could fall
or be damaged.

Convenient Features5-70
Fuel Filler Door
Opening the fuel filler door
ODN8059050ODN8059050
1. Turn the engine off.
2. Ensure the driver’s door is unlocked.
3. Push the fuel filler door near the 3 o’clock position.
ODN8059051ODN8059051
3. Pull the fuel filler door (1) outward to access the fuel tank cap.
4. To remove the fuel tank cap (2), turn it counterclockwise. You may hear a
hissing noise as the pressure inside
the tank equalizes.
5. Place the cap on the fuel filler door.
Information
If the fuel filler door does not open
because ice has formed around it, tap
lightly or push on the door to break the
ice and release the door. Do not pry on the
door. If necessary, spray around the door
with an approved deicer fluid (do not use
radiator antifreeze) or move the vehicle to
a warm place and allow the ice to melt.
Closing the fuel filler door
1. To install the fuel tank cap, turn it clockwise until it “clicks” one time.
2. Close the fuel filler door until it is latched securely.
WARNING
Gasoline is highly flammable and
explosive. Failure to follow these
guidelines may result in SERIOUS
INJURY or DEATH:
• Read and follow all warnings posted
at the gas station.
• Before refueling, note the location of
the Emergency Gasoline Shut-Off, if
available, at the gas station.
• Before touching the fuel nozzle, you
should eliminate the potential build-
up of static electricity by touching
a metal part of the vehicle, a safe
distance away from the fuel filler
neck, nozzle, or other gas source,
with your bare hand.
• Do not use cellular phones while
refueling. Electric current and/or
electronic interference from cellular
phones can potentially ignite fuel
vapors and cause a fire.