2018 Hyundai Sonata key battery

3-6
Mechanical key
If the remote key does not operate
normally, you can lock or unlock the
door by using the mechanical key.
Press the release button then the key
will unfold automatically.
To fold the key, fold the key manually
while pressing the release button.
Remote key precautions
The remote key will not work if any of
the following occur:
The key is in the ignition switch.
You exceed the operating distancelimit (about 90 feet [30 m]).
The remote key battery is weak.
Other vehicles or objects may be blocking the signal.
The weather is extremely cold.
The remote key is close to a radio transmitter such as a radio station or
an airport which can interfere with
normal operation of the remote key.
When the remote key does not work
correctly, open and close the door
with the mechanical key. If you have
a problem with the remote key con-
tact an authorized HYUNDAI dealer. If the remote key is in close proximi-
ty to your mobile phone, the signal
could be blocked by your mobile
phones normal operational signals.
This is especially important when the
phone is active such as making and
receiving calls, text messaging,
and/or sending/receiving emails.
Avoid placing the remote key and
your mobile phone in the same pants
or jacket pocket and always try to
maintain an adequate distance
between the two devices.
Convenient features of your vehicle
OLF047001

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Convenient features of your vehicle
Information
This device complies with Part 15 of
the FCC rules.
Operation is subject to the following
three conditions:
1. This device may not cause harmfulinterference, and
2. This device must accept any interfer- ence received, including interference
that may cause undesired operation.
3. Changes or modifications not expressly approved by the party
responsible for compliance could
void the user's authority to operate
the device.
Keep the remote key away from
electromagnetic materials that
blocks electromagnetic waves to
the key surface.
Battery replacement
If the remote key is not working prop-
erly, try replacing the battery with a
new one.
Battery Type: CR2032
To replace the battery:
1. Pry open the rear cover of the remote key.
2. Remove the old battery and insert the new battery. Make sure the
battery position is correct.
3. Reinstall the rear cover of the remote key. If you suspect your remote key might
have sustained some damage, or
you feel your remote key is not work-
ing correctly contact an authorized
HYUNDAI dealer.
Information
An inappropriately disposed
battery can be harmful to the
environment and human
health. Dispose the battery
according to your local law(s)
and regulation.
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NOTICE
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OLM042302

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Convenient features of your vehicle
Panic button
Press the Panic button (4) and hold
for more than one second. The horn
sounds and hazard warning lights
blink for about 30 seconds. To cancel
the panic mode, press any button on
the Smart Key.
Start-up
You can start the engine without
inserting the key.
For more information, refer to the
"Engine Start/Stop Button" sec-
tion in chapter 5.To prevent damaging the smart
key:
Keep the smart key away from
water or any liquid and fire. If the
inside of the smart key gets
damp (due to drinks or mois-
ture), or is heated, internal cir-
cuit may malfunction, excluding
the car from the warranty.
Avoid dropping or throwing the smart key.
Protect the smart key from extreme temperatures.
Always have the smart key with
you when leaving the vehicle. If
the smart key is left near the vehi-
cle, the vehicle battery may be dis-
charged.
Mechanical key
If the Smart Key does not operate
normally, you can lock or unlock the
door by using the mechanical key.
Press and hold the release button (1)
and remove the mechanical key (2).
Insert the mechanical key into the
key hole on the door.
To reinstall the mechanical key, put
the key into the hole and push it until
a click sound is heard.
NOTICE
NOTICE
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3-12
Convenient features of your vehicle
Battery replacement
If the Smart Key is not working prop-
erly, try replacing the battery with a
new one.
Battery Type: CR2032
To replace the battery:
1. Pry open the rear cover of thesmart key.
2. Remove the old battery and insert the new battery.
3. Reinstall the rear cover of the smart key. If you suspect your smart key might
have sustained some damage, or
you feel your smart key is not work-
ing correctly, contact an authorized
HYUNDAI dealer.
Information
An inappropriately disposed
battery can be harmful to the
environment and human
health. Dispose the battery
according to your local law(s)
and regulation(s).
Immobilizer System
The immobilizer system protects
your vehicle from theft. If an improp-
erly coded key (or other device) is
used, the engine's fuel system is dis-
abled.
When the ignition switch is placed in
the ON position, the immobilizer sys-
tem indicator should come on briefly,
then go off. If the indicator starts to
blink, the system does not recognize
the coding of the key.
Place the ignition switch to the
LOCK/OFF position, then place the
ignition switch to the ON position
again.
The system may not recognize your
key’s coding if another immobilizer
key or other metal object (i.e., key
chain) is near the key. The engine
may not start because the metal may
interrupt the transponder signal from
transmitting normally.
If the system repeatedly does not
recognize the coding of the key, it is
recommended that you contact your
HYUNDAI dealer.
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OLF044008

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Convenient features of your vehicle
Inside the vehicle
When you can not unlock the trunk
due to battery discharge or other
reasons, you can unlock the trunk
inside the vehicle.
Open the cable cover(1) under the
rear seat with a mechanical key and
pull the cable (2) for unlocking the
trunk.
Smart Trunk (if equipped)
On a vehicle equipped with a smart
key, the trunk can be opened using
the Smart Trunk system.
How to use the Smart Trunk
The trunk can be opened with no-
touch activation satisfying all the
conditions below.
After 15 seconds when all doorsare closed and locked
Positioned in the detecting area for more than 3 seconds.
Information
• The Smart Trunk does not operatewhen:
- The smart key is detected within15 seconds after the doors are
closed and locked, and is continu-
ously detected.
- The smart key is detected within 15 seconds after the doors are
closed and locked, and within 60
inches (1.5 m) from the front door
handles. (for vehicles equipped
with Welcome Light)
- A door is not locked or closed.
- The smart key is in the vehicle.
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OLF047046
OLF037086

3-80
Warning messages
(if equipped)
Shift to P(for smart key system and auto-matic transaxle)
This warning message illuminates
if you try to turn off the engine with-
out the shift lever in P (Park) posi-
tion.
At this time, the Engine Start/Stop button turns to the ACC position (If
you press the Engine Start/Stop
button once more, it will turn to the
ON position).
Low Key Battery (for smart key system)
This warning message illuminates
if the battery of the smart key is
discharged when the Engine
Start/Stop button changes to the
OFF position.
Press START button while turning wheel (for smart key system)
This warning message illuminates
if the steering wheel does not
unlock normally when the Engine
Start/Stop button is pressed.
It means that you should press the Engine Start/Stop button while
turning the steering wheel right
and left.
Steering wheel not locked (for smart key system)
This warning message illuminates
if the steering wheel does not lock
when the Engine Start/Stop button
changes to the OFF position.
Check steering wheel lock system (for smart key system)
This warning message illuminates
if the steering wheel does not lock
normally when the Engine Start/
Stop button changes to the OFF
position.
Press brake pedal to startengine (for smart key systemand automatic transaxle)
This warning message illuminates
if the Engine Start/Stop button
changes to the ACC position twice
by pressing the button repeatedly
without depressing the brake
pedal.
It means that you should depress the brake pedal to start the engine.
Key not in vehicle(for smart key system)
This warning message illuminates
if the smart key is not in the vehicle
when you press the Engine Start/
Stop button.
It means that you always have the smart key with you.
Key not detected (for smart key system)
This warning message illuminates
if the smart key is not detected
when you press the Engine Start/
Stop button.
Convenient features of your vehicle

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Convenient features of your vehicle
3
This indicator light illuminates for
2 seconds and goes off:
When the vehicle can not detect the
smart key which is in the vehicle
while the ignition switch or the
Engine Start/Stop button is ON.
In this case, have your vehicle inspect-
ed by an authorized HYUNDAI dealer.
This indicator light blinks:
When the battery of the smart keyis weak.
- At this time, you can not start theengine. However, you can start the
engine if you press the ignition
switch or the Engine Start/Stop but-
ton with the smart key. (For more
information, refer to "Starting
the Engine" in chapter 5).
When there is a malfunction with the immobilizer system.
In this case, have your vehicle
inspected by an authorized
HYUNDAI dealer.
Turn Signal IndicatorLight
This indicator light blinks:
When you turn the turn signal light
on.
If any of the following occurs, there
may be a malfunction with the turn
signal system. In this case, have your
vehicle inspected by an authorized
HYUNDAI dealer.
- The indicator light does not blinkbut illuminates.
- The indicator light blinks more rapidly.
- The indicator light does not illumi- nate at all.
High Beam IndicatorLight
This indicator light illuminates:
When the headlights are on and in
the high beam position.
When the turn signal lever is pulled into the Flash-to-Pass position.
Smart High Beam indi-cator (if equipped)
This warning light illuminates :
When the high-Beam is on with the
light switch in the AUTO light posi-
tion.
If your vehicle detects oncoming or preceding vehicles, the Smart High
Beam system will switch the high
beam to low beam automatically.
For more information, refer to
"Smart High Beam" in this chap-
ter.

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Convenient features of your vehicle
Battery saver function
The purpose of this feature is to pre-
vent the battery from being dis-
charged. The system automatically
turns off the parking lamp when the
key is removed (remote key) or when
the driver turns the engine off (smart
key) and opens the driver-side door.
With this feature, the parking lamps
will turn off automatically if the driver
parks on the side of road at night.
If necessary, to keep the lamps on
when the engine is turned off, perform
the following:
1) Open the driver-side door.
2) Turn the parking lamps OFF andON again using the light switch on
the steering column.
Headlamp delay function (if equipped)
If the key is removed from the ignition
switch or placed in the ACC position or
the LOCK/OFF position with the head-
lamps ON, the headlamps (and/or
parking lamps) remain on for about 5
minutes. However, if the driver’s door
is opened and closed, the headlights
are turned off after 15 seconds.
However, with the engine off if the dri-
ver's door is opened and closed, the
headlamps (and/or parking lamps) are
turned off after 15 seconds.
The headlamps (and/or parking lamps)
can be turned off by pressing the lock
button on the remote key or smart key
twice or turning the light switch to the
OFF or AUTO position. However, if you
turn the light switch to the AUTO posi-
tion when it is dark outside, the head-
lamps will not be turned off.
You can activate or deactivate the
Headlamp Delay function from the
User Settings Mode (Light) on the
LCD display.
For more information, refer to the
"LCD Display" section in this
chapter. If the driver gets out of the vehicle
through other doors (except dri-
ver's door), the battery saver func-
tion does not operate and the
headlamp delay function does not
turn off automatically. Therefore, It
causes the battery to be dis-
charged. In this case, make sure
to turn off the lamp before getting
out of the vehicle.
NOTICE