2023 HYUNDAI NEXO battery replacement

3-9
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. 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.
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.
InformationAn inappropriately disposedbattery can be harmful to the
environment and human
health. Dispose of the battery
according to your local law(s)
or regulations.
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3
OFE048009
OFE048008
This device complies with
Industry Canada licence-
exempt RSS standard(s).
Operation is subject to the fol-
lowing two conditions: (1) this
device may not cause interfer-
ence, and (2) this device must
accept any interference, includ-
ing interference that may causeundesired operation of the
device.
IC WARNING

3-116
Convenient features of your vehicle
Big vehicles such as buses ortrucks parked
Sensor covered with foreign mat- ter, such as snow or water
An obstacle such as a trash can, bicycle, shopping cart, etc. is near
Heavy wind
Wheel changed to an unauthorized size
A problem with the wheel alignment
Vehicle leaned severely to one side
Front or rear distance sensors are malfunction or not working properly.
(Refer to the Parking Distance
Warning system in chapter 3.)
requires battery replacementLimitations of the System
When the vehicle has beenparked/stopped for a long time in a
cold environment, the Remote
Moving Forward/Backward may be
delayed depending on the vehicle
condition when the vehicle is
turned on remotely.
The RSPA system may suddenly apply brake to avoid collision
against stationary or movingobject.
The system may be cancelled unexpectedly when a person or
animal passes by near the vehicle.
The performance of the system may be degraded and frequently
stop when driving in strong electricfield area.
Right after the parking place search complete and beep sound
is generated, the search complete
may be cancelled according to the
surrounding environment Even while the system is in activa-
tion, the vehicle may collide with
the object existing within the blind-
spot area of the sensor.
When there is any obstacle within the blind-spot area, drive out of the
parking space manually.
The system may not recognize the object that appears suddenly.
The system does not work if there is no car parked in front of the
parking space you are planning to
park.

5-120
Driving your vehicle
If you believe your brakes may bewet, apply them lightly while driv-
ing until normal braking operation
returns.
Hydroplaning
If the road is wet enough and you are
going fast enough, your vehicle may
have little or no contact with the road
surface and actually ride on the
water. The best advice is SLOW
DOWN when the road is wet.
The risk of hydroplaning increas- es as the depth of tire tread
decreases, refer to "Tire
Replacement" in chapter 7.
Driving in Flooded Areas
Avoid driving through flooded areas
unless you are sure the water is nohigher than the bottom of the wheel
hub. Drive through any water slowly.
Allow adequate stopping distance
because brake performance may bereduced.
After driving through water, dry the
brakes by gently applying them sev-
eral times while the vehicle is moving
slowly.
Highway Driving
Tires
Adjust the tire inflation, as specified.
Under-inflation may overheat or
damage the tires.
Do not install worn-out or damaged
tires, which may reduce traction or
fail the braking operation.
Information
Never over-inflate your tires above the
maximum inflation pressure, as speci-
fied on your tires.
Coolant and high voltage bat- tery
Be sure to check both the coolant
level and the high voltage battery
level before driving.
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6-4
If you have a flat tire while driving
If a tire goes flat while you are driv- ing:
1. Take your foot off the acceleratorpedal and let the vehicle slow
down while driving straight ahead.
Do not apply the brakes immedi-ately or attempt to pull off the road
as this may cause a loss of con-
trol. When the vehicle has slowed
to such a speed that it is safe to do
so, brake carefully and pull off the
road. Drive off the road as far as
possible and park on firm, level
ground. If you are on a divided
highway, do not park in the medi-
an area between the two traffic
lanes.
2. When the vehicle is stopped, turn on your emergency hazard flash-
ers, set the parking brake and shift
gear to the P(Park) position.
3. Have all passengers get out of the vehicle. Be sure they all get out on
the side of the vehicle that is away
from traffic.
If the vehicle stalls while driv- ing
1. Reduce your speed gradually,keeping a straight line. Move cau-
tiously off the road to a safe place.
2. Turn on your emergency flashers.
3. Try to start the vehicle again. If your vehicle will not start, contact
an authorized HYUNDAI dealer. Be sure the shift lever is in P
(Park). The vehicle starts only
when the shift lever is in P (Park).
This vehicle does not have a regu- lar 12V battery that needs periodic
replacement. It is lithium ion poly-
mer type integrated into the high
voltage battery. The vehicle has a
12V battery protection system that
cuts 12V battery from vehicle draw
to prevent full discharge. If vehicle
will not start, first try pressing the
12V Battery Reset switch (left side
of the steering wheel near the fuel
door open switch) to reconnect the
12V battery, but you must start
vehicle within 15 seconds of press-
ing the 12V Battery Reset switch.
After starting vehicle, operate the
vehicle safely outdoors in ready
mode stopped and/or drive it for 30
minutes total to charge the 12V
battery fully.
Check the fuel level and add fuel if necessary.
Do not push or pull the vehicle to start it.
If the vehicle still does not start, call
an authorized HYUNDAI dealer for
assistance.
What to do in an emergency
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6-5
What to do in an emergency
6
Before Jump Starting
This vehicle does not have a regular
12V battery that needs periodic
replacement. It is lithium ion polymer
type integrated into the high voltage
battery. The vehicle has a 12V bat-
tery protection system that cuts 12V
battery from vehicle draw to prevent
full discharge.
Using the 12V Battery ResetSwitch
1. Press the 12V Battery Reset switch to reconnect the 12V bat-
tery.
2. Start the vehicle within 15 sec- onds of pressing the 12V Battery
Reset switch.
3. After starting vehicle ( indica- tor on), move the vehicle outside
and keep the vehicle ready ( )
mode more than 30 minutes safe-
ly to charge the 12V battery. If you do not start the vehicle imme-
diately after pressing the 12V Battery
Reset switch, the power of 12V bat-
tery is automatically disconnected
after few seconds to save the 12V
battery from additional discharge. If
the 12V battery is disconnected prior
to starting the vehicle, press the 12V
Battery Reset switch again and then
immediately start the vehicle as
explained.
Repeated use of the 12V Battery
Reset switch without a sufficient
vehicle ON cycle (30 Min+) may
cause over discharge of the 12V bat-
tery, which will prevent the vehicle
from starting. If the 12V battery is
over discharged to a point that the
reset does not work, try to jump-start
the vehicle.
Information
After starting the vehicle ( indica-
tor on), the 12V battery is being
charged whether the accelerator pedal
is depressed or not.
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OFEQ018012

6-18
What to do in an emergency
Introduction
With the Tire Mobility Kit you stay
mobile even after experiencing a tire
puncture. The compressor and sealing com-
pound system effectively and com-
fortably seals most punctures in a
passenger car tire caused by nailsor similar objects and reinflates the
tire.
After you ensure that the tire is prop-
erly sealed you can drive cautiouslyon the tire (distance up to 200 km
(120 miles)) at a max. speed of (80km/h (50 mph)) in order to reach a
service station or tire dealer for thetire replacement.
It is possible that some tires, espe- cially with larger punctures or dam-
age to the sidewall, cannot be sealed
completely.
Air pressure loss in the tire may
adversely affect tire performance.
For this reason, you should avoid
abrupt steering or other driving
maneuvers, especially if the vehicle
is heavily loaded or if a trailer is in
use.The Tire Mobility Kit is not designed
or intended as a permanent tire
repair method and is to be used for
one tire only.
This instruction shows you step by
step how to temporarily seal the
puncture simply and reliably.
Read the section "Notes on the safe
use of the Tire Mobility Kit".
Notes on the safe use of the
Tire Mobility Kit
Park your car at the side of the road so that you can work with the
Tire Mobility Kit away from moving
traffic.
To be sure your vehicle will not move, even when you're on fairly
level ground, always set your park-
ing brake.
Only use the Tire Mobility Kit for sealing/inflation passenger car
tires. Only punctured areas locatedwithin the tread region of the tirecan be sealed using the tire mobil-ity kit.
Do not use on motorcycles, bicy- cles or any other type of tires. When the tire and wheel are dam-
aged, do not use Tire Mobility Kit
for your safety.
Use of the Tire Mobility Kit may not be effective for tire damage larger
than approximately 4 mm (0.16in.). Please contact the nearest
HYUNDAI dealership if the tire
cannot be made roadworthy with
the Tire Mobility Kit.
Do not use the Tire Mobility Kit if a tire is severely damaged by driving
run flat or with insufficient air pres-
sure.
Do not remove any foreign objects such as nails or screws that have
penetrated the tire.
Provided the car is outdoors, leave the vehicle ON ( indicator ON).
Otherwise operating the compres-
sor may eventually drain the car
battery.
Never leave the Tire Mobility Kit unattended while it is being used.
Do not leave the compressor run- ning for more than 10 minutes at a
time or it may overheat.

7
Maintenance
7
Maintenance
Fuel Cell Power Module Compartment ...............7-3
Maintenance Services ...........................................7-4Owner's Responsibility .....................................................7-4
Owner Maintenance Precautions..................................7-4
Owner Maintenance ..............................................7-5 Owner Maintenance Schedule .......................................7-6
Scheduled Maintenance Services........................7-7 Normal Maintenance Schedule ......................................7-8
Maintenance Under Severe Usage Conditions ........7-10
Explanation of Scheduled Maintenance Items ..7-12
Device Cooling Coolant .......................................7-13 Checking the Coolant Level ..........................................7-13
Changing Coolant ............................................................7-15
Stack Cooling Coolant .........................................7-16 Checking the Coolant Level ..........................................7-16
Changing Coolant ............................................................7-18
Brake Fluid ............................................................7-19 Checking the Brake Fluid Level ...................................7-19
Washer Fluid .........................................................7-20 Checking the Washer Fluid Level................................7-20
Air Cleaner ............................................................7-20 Filter Replacement ..........................................................7-20
Climate Control Air Filter ....................................7-22 Filter Inspection ...............................................................7-22 Wiper Blades.........................................................7-24
Blade Inspection ..............................................................7-24
Blade Replacement .........................................................7-24
12V Battery ...........................................................7-27 Battery Recharging ........................................................7-28
Reset Features.................................................................7-28
Tires and Wheels .................................................7-29 Tire Care ............................................................................7-29
Recommended Cold Tire Inflation Pressures ...........7-30
Check Tire Inflation Pressure ......................................7-31
Tire Rotation.....................................................................7-32
Wheel Alignment and Tire Balance ............................7-33
Tire Replacement ............................................................7-33
Wheel Replacement ........................................................7-34
Tire Traction .....................................................................7-34
Tire Maintenance ............................................................7-34
Tire Sidewall Labeling ....................................................7-34
Tire Terminology and Definitions................................7-38
All Season Tires ...............................................................7-42
Summer Tires ...................................................................7-42
Snow Tires ........................................................................7-42
Radial-Ply Tires ...............................................................7-42
Low Aspect Ratio Tires..................................................7-43
7

7-27
7
Maintenance
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The vehicle is not equipped with a
common 12V battery which requires
periodic replacement. The battery is
a lithium polymer type integrated into
the high voltage battery. Full dis-
charge of the battery is prevented
through 12V battery protection sys-tem which can isolate the 12V bat-
tery.
To prevent SERIOUS INJURY or
DEATH to you or bystanders,
always follow these precautions
when working near or handling
the battery: Always read and follow
instructions carefully
when handling a battery.
Wear eye protection
designed to protect the
eyes from acid splashes.
Keep all flames, sparks, or smoking materials
away from the battery.
WARNING
Hydrogen is always present in battery cells,
is highly combustible,
and may explode if ignit-ed.
Keep batteries out of
reach of children. Batteries contain sulfu-
ric acid which is highly
corrosive. Do not allow
acid to contact your
eyes, skin or clothing.
If acid gets into your eyes, flush
your eyes with clean water for at
least 15 minutes and get imme-
diate medical attention. If acid
gets on your skin, thoroughly
wash the area. If you feel pain or
a burning sensation, get med-
ical attention immediately.When lifting a plastic-cased
battery, excessive pressure
on the case may cause battery
acid to leak. Lift with a battery
carrier or with your hands on
opposite corners.
Do not attempt to jump start
your vehicle if your battery is
frozen.
NEVER attempt to recharge
the battery when the vehicle’s
battery cables are connected
to the battery.
The electrical ignition system
works with high voltage.
NEVER touch these compo-
nents with the vehicle ON
( indicator ON) or when
the POWER button is in theON position.