2012 Hyundai Sonata key battery

Safety features of your vehicle
42
3
Driver's and passenger's front air
bag
Your vehicle is equipped with a
Supplemental Restraint (Air Bag) Systemand the lap/shoulder belts at both the
driver and passenger seating positions.The indications of the system's presence
are the letters "SRS AIR BAG" or "AIR
BAG" embossed on the air bag pad cover
in the steering wheel and the passen-
ger's side front panel pad above the
glove box. The SRS consists of air bags installed
under the pad covers in the centre of the
steering wheel and the passenger's side
front panel above the glove box.
WARNING
If an air bag deploys, there may be a loud noise followed by a fine
dust released in the vehicle.These conditions are normal and
are not hazardous - the air bags
are packed in this fine powder.
The dust generated during air
bag deployment may cause skin
or eye irritation as well as aggra-
vate asthma for some persons.
Always wash all exposed skin
areas thoroughly with lukewarmwater and a mild soap after an
accident in which the air bags
were deployed.
The SRS can function only when the ignition switch is in the ON
position. If the SRS " " warning
light does not illuminate, or con-
tinuously remains on after illumi-
nating for about 6 seconds when
the ignition switch is turned to
the ON position, or after the
engine is started, comes on
whilst driving, the SRS is not
working properly. If this occurs,
have your vehicle immediately
inspected by an authorised
HYUNDAI dealer.
(Continued)(Continued)
Before you replace a fuse or dis-connect a battery terminal, turn
the ignition switch to the LOCK
position and remove the ignition
key. Never remove or replace the
air bag related fuse(s) when the
ignition switch is in the ON posi-
tion. Failure to heed this warning
will cause the SRS “ ” warning
light to illuminate.
OYF039030R
Driver’s front air bag

49
Features of your vehicle
Battery replacement
A smart key battery should last for sever-
al years, but if the smart key is not work-
ing properly, try replacing the battery with
a new one. If you are unsure how to use
your smart key or replace the battery,
contact an authorised HYUNDAI dealer.
✽✽NOTICE
The circuit inside the smart key can
have a problem if exposed to moisture
or static electricity. If you are unsure
how to use your smart key or replace the
battery, contact an authorised
HYUNDAI dealer.
1. Pry open the rear cover of the smart key.
2. Replace the battery with a new battery (CR2032). When replacing the battery,
make sure the battery positive “+” sym-
bol faces up as indicated in the illus-
tration.
3. Install the battery in the reverse order of removal.
✽✽ NOTICE
 Using the wrong battery can cause the smart key to malfunction. Be sure to
use the correct battery.
 Circuits inside the smart key may
develop problems when dropped,
exposed to moisture or static elec-
tricity.
 If you suspect that your smart key might have sustained some damage,
or you feel your smart key is not
working correctly, contact an autho-
rised HYUNDAI dealer.
CAUTION
An inappropriately disposed bat-
tery can be harmful to the environ-
ment and human health.
Dispose the battery according toyour local law(s) or regulation.
OBH048004

Features of your vehicle
10
4
Remote keyless entry system operations
Lock (1)
All doors are locked if the lock button is pressed whilst all doors are closed.
The hazard warning lights blink once to
indicate that all doors are locked.
However, if any door, engine bonnet or
trunk remains open, the hazard warning
lights will not operate. If all doors, engine
bonnet and trunk are closed after the
lock button is pressed, the hazard warn-
ing lights blink once.
Unlock (2)
All doors are unlocked if the unlock but- ton is pressed.
The hazard warning lights will blink twice
to indicate that all doors are unlocked.
After depressing this button, the doors
will be locked automatically unless you
open any door within 30 seconds.
Trunk unlock (3)
The trunk is unlocked if the button is
pressed for more than 1 second.
Once the trunk is opened and then
closed with all doors locked, the trunk will
be locked automatically. Transmitter precautions
✽✽
NOTICE
The transmitter will not work if any of
following occur:
 The ignition key is in ignition switch.
 You exceed the operating distance limit (about 30 m [90 feet]).
 The battery in the transmitter is weak.
 Other vehicles or objects may be blocking the signal.
 The weather is extremely cold.
 The transmitter is close to a radio transmitter such as a radio station or
an airport which can interfere with
normal operation of the transmitter.
When the transmitter does not work
correctly, open and close the door with
the ignition key. If you have a problem
with the transmitter, contact an autho-
rised HYUNDAI dealer.
REMOTE KEYLESS ENTRY (IF EQUIPPED)
ONF048011L
CAUTION
Keep the transmitter away from water or any liquid. If the keylessentry system is inoperative due to
exposure to water or liquids, it will not be covered by your manufactur-er vehicle warranty.

411
Features of your vehicle
Battery replacement
The transmitter uses a 3 volt lithium bat-
tery which will normally last for several
years. When replacement is necessary,
use the following procedure.
1. Insert a slim tool into the slot and gen-tly pry open the transmitter centre
cover. 2. Replace the battery with a new battery
(CR2032). When replacing the battery,
make sure the battery positive “+” sym-
bol faces up.
3. Install the battery in the reverse order of removal.
For replacement transmitters, see an
authorised HYUNDAI dealer for transmit-
ter reprogramming.
CAUTION
Changes or modifications not expressly approved by the party
responsible for compliance couldvoid the user’s authority to operatethe equipment. If the keyless entry system is inoperative due to
changes or modifications notexpressly approved by the partyresponsible for compliance, it will
not be covered by your manufactur-er’s vehicle warranty.
ONF048120HNF2005

Features of your vehicle
12
4
CAUTION
The keyless entry system trans-
mitter is designed to give you
years of trouble-free use, howev-er it can malfunction if exposed tomoisture or static electricity. If you are unsure how to use your
transmitter or replace the battery,contact an authorised HYUNDAI dealer.
Using the wrong battery can cause the transmitter to malfunc-tion. Be sure to use the correctbattery.
To avoid damaging the transmit- ter, don't drop it, get it wet, or
expose it to heat or sunlight.
CAUTION
An inappropriately disposed bat-tery can be harmful to the environ-
ment and human health.
Dispose the battery according toyour local law(s) or regulation.

Features of your vehicle
58
4
When the ignition switch is turned to
the ON position and the indicator turns
off after 2 seconds, the system may
have a problem. Have the vehicle
checked by an authorised HYUNDAI
dealer.
When the battery is weak, if the engine start/stop button is depressed, the indi-
cator will blink and you will not be able
to start the engine. However, you may
still be able to start the engine by
inserting the smart key in the smart
key holder. If smart key system related
parts have a problem, the indicator
blinks.Low fuel level warning light
This warning light indicates the fuel tank
is nearly empty. When it comes on, you
should add fuel as soon as possible.
Driving with the fuel level warning light on
or with the fuel level below “E” can causethe engine to misfire and damage the
catalytic converter.
Malfunction indicator light
(MIL) (check engine light)
This indicator light is part of the Engine
Control System which monitors various
emission control system components. If
this light illuminates whilst driving, it indi-cates that a potential malfunction has
been detected somewhere in the emis-sion control system. This light will also illuminate when the
ignition switch is turned to the ON posi-
tion, and will go out in a few seconds
after the engine is started. If it illuminates
whilst driving, or does not illuminate
when the ignition switch is turned to the
ON position, take your vehicle to your
nearest authorised HYUNDAI dealer and
have the system checked.
Generally, your vehicle will continue to be
drivable, but have the system checked by
an authorised HYUNDAI dealer promptly.

461
Features of your vehicle
Warning on the LCD screen (if equipped)
Key is not in vehicle
If the smart key is
not in the vehicle
and if any door isopened or closedwith the ignition
switch in ACC, ON,
or START, the
warning illuminates on the LCD screen.
The chime also sounds for 5 seconds
when there smart key is not in the vehi-
cle and any door is closed.
Turn the ignition switch off or get hold of
the smart key.
Key is not detected
If the smart key is
not in the vehicleor is not detected
and you push the
engine start/stop
button, the warn-ing illuminates on
the LCD screen for 10 seconds.
Low key battery
When the smart
key in the vehicle
discharges, the
warning illumi-nates on the LCD
screen for 10 sec-
onds.
Replace the battery with a new one. If it
is not possible, you can start the engine
by inserting the smart key into the smart
key holder and pushing the engine
start/stop button.

469
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 lights when the
driver removes the ignition key (smart
key: turns off the engine) and opens
the driver-side door.
With this feature, the parking lights will be turned off automatically if the driver
parks on the side of road at night.
If necessary, to keep the lights on
when the ignition key is removed,
(smart key: turns off the engine) per-
form the following:
1) Open the driver-side door.
2) Turn the parking lights OFF and ON again using the light switch on the
steering column. Headlight escort function (if equipped)
If you turn the ignition switch to the ACC or OFF position with the headlights ON,the headlights (and/or tail lights) remain
on for about 20 minutes. However, if the
driver’s door is opened and closed, the
headlights are turned off after 30 sec-
onds.
The headlights can be turned off by
pressing the lock button on the transmit-
ter (or smart key) twice or turning the
light switch to the OFF or Auto position.
However, the Headlight escort function
can be deactivated when the headlight
switch is in the Auto position.
Headlight welcome function (if equipped)
When the headlight is ON or AUTO posi-
tion and all doors (and trunk) is closed
and locked, if you press the door unlock
button on the transmitter (or the smart
key), the headlight will come on for about
15 seconds. At this time, if you press the
door lock or unlock button, the headlight
will turn off immediately.
LIGHTING
CAUTION
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 head-
light escort function does not turn off automatically. Therefore, it caus-es the battery to be discharged. Inthis case, make sure to turn off the
lamp before getting out of the vehi- cle.