2018 Hyundai Ioniq Hybrid change key battery

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Remote key precautions
The remote key may not work if any
of the following occur:
• The key is in the ignition switch.
• You exceed the operating distance
limit (about 30 m [90 feet]).
• 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, it is rec-
ommended that you contact an
authorized HYUNDAI dealer.
If the remote key is in close proximity
to your mobile phone, the signal could
be blocked by your mobile phone’s
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 loca-
tion and always try to maintain an
adequate distance between the two
devices.
Information
Changes or modifications not express-
ly approved by the party responsible
for compliance could void the user’s
authority to operate the equipment. If
the keyless entry system is inoperative
due to changes or modifications not
expressly approved by the party
responsible for compliance, it will not
be covered by your manufacturer’s
vehicle warranty.
Keep the remote key away from
electromagnetic materials that
block 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. Insert a slim tool into the slot and
gently pry open the cover.
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.
NOTICE
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Convenient features of your vehicle
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Convenient features of your vehicle
Smart key precautions
The smart key may not work if any of
the following occur:
• The smart key is close to a radio
transmitter such as a radio station
or an airport which can interfere
with normal operation of the trans-
mitter.
• The smart key is near a mobile two
way radio system or a cellular
phone.
• Another vehicle’s smart key is
being operated close to your vehi-
cle.
When the smart key does not work
correctly, open and close the door
with the mechanical key. If you have
a problem with the smart key, it is
recommended that you contact an
authorized HYUNDAI dealer.
If the smart key is in close proximity
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 smart key and your
mobile phone in the same location and
always try to maintain an adequate dis-
tance between the two devices.
Information
Changes or modifications not express-
ly approved by the party responsible
for compliance could void the user’s
authority to operate the equipment. If
the keyless entry system is inoperative
due to changes or modifications not
expressly approved by the party
responsible for compliance, it will not
be covered by your manufacturer’s
vehicle warranty.
Keep the smart key away from
electromagnetic materials that
blocks electromagnetic waves to
the key surface.
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. Remove the mechanical key.
2. Use a slim tool to pry open the
rear cover of the smart key.
3. Remove the old battery and insert
the new battery. Make sure the
battery position is correct.
4. Reinstall the rear cover of the
smart key.
NOTICE
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LCD display messages
Shift to P
(for smart key system)
This warning message is displayed if
you try to turn off the vehicle with the
shift lever in the N (Neutral) position.
At this time, the Engine Start/Stop
button turns to the ACC position (If
you press the Engine Start/Stop but-
ton once more, it will turn to the ON
position).
Low Key Battery
(for smart key system)
This warning message is displayed if
the battery of the smart key is dis-
charged while changing the Engine
Start/Stop button to the OFF posi-
tion.
Press START button while turn-
ing wheel (for smart key system)
This warning message is displayed if
the steering wheel does not unlock
normally when the Engine Start/Stop
button is pressed.
You should press the Engine
Start/Stop button while turning the
steering wheel right and left.
Check Steering Wheel Lock
System (for smart key system)
This warning message is displayed if
the steering wheel does not lock nor-
mally while the Engine Start/Stop but-
ton changes to the OFF position.
Press brake pedal to start vehicle
(for smart key system)
This warning message is displayed if
the Engine Start/Stop button changes
to the ACC position twice by pressing
the button repeatedly without depress-
ing the brake pedal.
You can start the vehicle by depressing
the brake pedal.
Key not in vehicle
(for smart key system)
This warning message is displayed if
the smart key is not in the vehicle
when you press the Engine Start/Stop
button.
When attempting to start the vehicle,
always have the smart key with you.
Convenient features of your vehicle

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Driving your vehicle
Check battery and cables
Winter temperatures affect battery
performance.Inspect the battery
and cables, as specified in the
chapter 7.The battery charging level
can be checked by an authorized
HYUNDAI dealer or in a service sta-
tion.
Change to "winter weight" oil if
necessary
In some regions during winter, it is
recommended to use the "winter
weight" oil with lower viscosity. For
further information, refer to the chap-
ter 8. When you are not sure about a
type of winter weight oil, consult an
authorized HYUNDAI dealer.Check spark plugs and ignition
system
Inspect the spark plugs, as speci-
fied in the chapter 7.If necessary,
replace them. Also check all ignition
wirings and components for any
cracks, wear-out, and damage.
To prevent locks from freezing
To prevent the locks from being
frozen, spray approved de-icing fluid
or glycerin into key holes. When a
lock opening is already covered with
ice, spray approved de-icing fluid
over the ice to remove it. When an
internal part of a lock freezes, try to
thaw it with a heated key. Carefully
use the heated key to avoid an injury.Use approved window washer
anti-freeze solution in system
To prevent the window washer from
being frozen, add authorized window
washer anti-freeze solution, as spec-
ified on the window washer contain-
er. Window washer anti-freeze solu-
tion is available from an authorized
HYUNDAI dealer, and most vehicle
accessory outlets. Do not use engine
coolant or other types of anti-freeze
solution, to prevent any damage to
the vehicle paint.