2023 HYUNDAI NEXO reset

7-28
Maintenance
Battery Recharging
By RESET button
To charge the discharged 12V bat-
tery, attempt charging by pressing
12V BATT RESET button. For more
details, refer to “If the 12 volt battery
is discharged” in chapter 6.
By jump starting
After a jump start from a good bat-
tery, drive the vehicle for 20-30 min-
utes before it is shutoff. The vehicle
may not restart if you shut it off
before the battery had a chance to
adequately recharge. See "Jump
Starting" in chapter 6 For more
details on jump starting procedures.
Reset Features
Some items need to be reset after
the battery has been discharged or
the battery has been disconnected.
See chapter 3 or 4 for:
Power Windows
Trip Computer
Climate Control System
Clock
Audio System
Sunroof
Driver Position Memory System
OFEQ018012

7-33
7
Maintenance
Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced carefully at the
factory to give you the longest tire life
and best overall performance.
In most cases, you will not need to
have your wheels aligned again.
However, if you notice unusual tire
wear or your vehicle pulling one way
or the other, the alignment may needto be reset.
If you notice your vehicle vibrating
when driving on a smooth road, your
wheels may need to be rebalanced.
Improper wheel weights can dam-
age your vehicle's aluminum
wheels. Use only approved wheelweights.
Tire Replacement
If the tire is worn evenly, a tread wear indicator will appear as a solid band
across the tread. This shows there isless than 1.6 mm (1/16 inch) of tread
left on the tire. Replace the tire when
this happens.
Do not wait for the band to appear
across the entire tread before replac-
ing the tire.
NOTICE
OLMB073027
Tread wear indicatorTo reduce the risk of DEATH or
SERIOUS INJURY:
Replace tires that are worn,
show uneven wear, or are
damaged. Worn tires can
cause loss of braking effec-
tiveness, steering control, andtraction.
Always replace tires with the
same size as each tire that
was originally supplied with
this vehicle. Using tires andwheels other than the recom-
mended sizes could cause
unusual handling characteris-
tics, poor vehicle control, or
negatively affect your vehi-
cle's Anti-Lock Brake System(ABS) resulting in a seriousaccident.
WARNING

H25
When the high voltage battery is weak
When the high voltage battery is
weak due to driving on a hill for a
long time or accelerating and decel-
erating the vehicle repeatedly, the
acceleration performance may be
lower than usual. In this case, be
cautious not to overtake other vehi-
cles.
If the 12 volt battery is dis-
charged
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.
If the 12V battery is discharged, you
should try charging it by pressing the
"12V BATT RESET" button.
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.
OFEQ018012

H26
FFEE AA TTUU RREESS OO FF FF CC EE VV (( CC OO NNTT..))
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 ON
cycle (30 Min+) may cause over dis-
charge of the 12V battery, 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. ❈
❈ For more details regarding the
jump start, refer to the 'Jump star-
ing' in Owner's manual Chapter 6.
Emergency while driving
If an accident occurs
1. Stop the vehicle, put the gear into
the P(Park) position, set the park-
ing brake, and turn the vehicle off
to prevent the hydrogen and cur-rent from leaking.
The flow of hydrogen into the fuel cell stack will be shut off to prevent
the current from being generated.
2. Evacuate to the safety place.
3. Call emergency services for help and let them know the vehicle is a
Fuel Cell Electric Vehicle.
i

H33
CategoryQuestionsAnswers
Vehicle
Management (12 items)
11. Can I wash my FCEV with pressurized water? What if water flows into the fuel
cell power module compartment?
Every component housed in the fuel cell power module compart-
ment is designed to be waterproof like those found in standard vehi-
cles. Therefore, a short circuit of the FCEV cannot happen while
washing the car. However, your FCEV works by utilizing high-voltage
electric power, so it is recommended that you avoid high-pressure car
washes. If the insulation resistance of the FCEV deteriorates due to
car wash, a High voltage warning light may turn on the cluster.

12. When washing the fuel cell power mod-ule compartment, is there any potential
risk of electric shock resulting from a
high-voltage short circuit?The FCEV is designed to be a waterproof structure, but please
avoid washing the inside of the compartment if possible. Because
there are many high voltage parts in the power module compart-ment.
13. Can I wash the bottom of the vehicle? Ifyes, what should I be aware of?The FCEV is designed to be a waterproof structure, but please
avoid washing the botttom of the vehicle if possible. Because there
are high voltage cables in the under cover.
14. Can driving with a tire chain affect thedrive motor?Driving with a tire chain causes no direct damage to the drive motor.
15. How should I jump start the vehicle?
Try charging it by pressing the “12V BATT RESET” button first. Refer
to the "If the 12 volt battery is discharged" in this guide book. It it
doesn't work, refer to the "Jump starting" in the Owner's manualchapter 6.

H34
CategoryQuestionsAnswers
Vehicle
Management (12 items)
16. Does the FCEV use a different coolant type from that of standard vehicles?
(Difference between Stack cooling
coolant and Device cooling coolant.)
Stack cooling coolant is an exclusive coolant for the fuel cell, which
is characterized by its use of a non-ionic anti-corrosion agent (an
additive) and very low electric conductivity. In comparison, the
device cooling coolant is a coolant similar to that used in standard
vehicles and has a very high electric conductivity.
If the stack cooling coolant is used with the electrical cooling sys-
tem, it will corrode the electrical system parts. If the device coolingcoolant is used with the fuel cell cooling system, it will damage the
system insulation resistor due to high electric conductivity. This car-
ries the additional risk of shocking the driver (electric shock).
17. What should I be aware of when park-ing the vehicle? Can I park the FCEV in
an enclosed underground parking lot?
(Risk of hydrogen gas leak.)
Hydrogen gas supply is cutoff after Power-OFF to prevent the hydro- gen gas from leaking.
18. If the FCEV will be parked for a longperiod, what should I do?
For long-term parking situations, a high-voltage battery will gradually
lose its charge [low SOC(State Of Charge)], potentially causing igni-
tion failure.
1. In order to minimize the discharge of the high-voltage battery, turnoff the power using the POWER button and disconnect the (-) ter-
minal of the auxiliary battery (12 V) from the vehicle.
2. To recharge the high-voltage battery, it is recommended that you drive your FCEV two or three times a month, for no less than 10
minutes or 3 km (2 miles) during each session.
3. If the vehicle does not startup, press the "12V BATT RESET" but- ton or jump start the vehicle. Otherwise contact an authorized
HYUNDAI dealer.
CCUU SSTT OO MM EERR QQ &&AA GG UU IIDD EE (( CC OO NNTT..))

I-2
12V Battery .....................................................................7-27
Battery Recharging .....................................................7-28
Reset Features ............................................................7-28
AC Inverter ...................................................................3-167
Accessing Your Vehicle ....................................................3-3 Immobilizer System ...................................................3-10
Smart Key.....................................................................3-3
Active Hood Lift System ................................................2-70 System Activation ......................................................2-70
System Limitation ......................................................2-71
System Malfunction ...................................................2-72
Air Bag - Advanced Supplemental Restraint System.....2-47 Additional Safety Precautions ....................................2-69
Air Bag Warning Labels.............................................2-69
Curtain air bags ..........................................................2-51
Driver's front air bag ..................................................2-49
How Does the Air Bag System Operate? ...................2-52
Occupant Classification System (OCS) .....................2-58
Passenger's front air bag.............................................2-49
Side air bags ...............................................................2-50
SRS Care ....................................................................2-68
What to Expect After an Air Bag Inflates ..................2-57
Where Are the Air Bags? ...........................................2-49
Why Didn't My Air Bag Go Off in a Collision?........2-63 Air Bag Warning Labels .................................................2-69
Air Cleaner......................................................................7-20
Filter Replacement .....................................................7-20
Air Conditioning System ..................................................8-5
Anti-lock Brake System (ABS) ......................................5-29
Appearance Care .............................................................7-62 Exterior Care ..............................................................7-62
Interior Care ...............................................................7-67
Auto Hold .......................................................................5-25
Automatic Climate Control System..............................3-147 Automatic Temperature Control Mode ....................3-148
Manual Temperature Control Mode .........................3-148
System Maintenance ................................................3-156
System Operation .....................................................3-154
Before Driving ..................................................................5-4 Before Entering the Vehicle .........................................5-4
Before Starting .............................................................5-4
Blind-Spot Collision Warning/ Blind-Spot Collision-Avoidance Assist .......................5-53
Detecting Sensor (Front View Camera and Rear Corner Radar) .................................................5-59
Limitations of the System ..........................................5-62
System Description ....................................................5-53
System Setting and Activation ...................................5-54
Warning and System Control .....................................5-57
Index
A
B

I-4
Driver Attention Warning (DAW) System......................5-94
Resetting the System ..................................................5-95
System Malfunction ...................................................5-96
System Setting and Activation ...................................5-94
System Standby ..........................................................5-96
Driver's front air bag .......................................................2-49
Electric Power Steering (EPS) ........................................3-20
Electronic Parking Brake (EPB) .....................................5-19
Electronic Stability Control (ESC) .................................5-31
Emergency Fuel Filler Door Release..............................3-57
Explanation of Scheduled Maintenance Items ...............7-12
Exterior Features .................................................3-42, 3-176 Emergency Fuel Filler Door Release .........................3-57
Fuel Filler Door ..........................................................3-55
Hood ...........................................................................3-42
Non-Powered Tailgate ................................................3-43
Power Tailgate ............................................................3-45
Roof Side Rails ........................................................3-176
Smart Tailgate.............................................................3-51
Exterior Lights ................................................................3-89 AUTO headlamp position ..........................................3-89
Battery saver function ................................................3-95
Daytime running light (DRL) ....................................3-89
Headlamp position......................................................3-90
Headlight time-out function .......................................3-95
High Beam Assist (HBA) ...........................................3-91 High beam operation ..................................................3-91
Lane change signals ...................................................3-94
Parking lamp position ................................................3-90
Turn signals ................................................................3-94
Exterior Overview.............................................................1-2
Features of FCEV............................................................H10 Emergency while driving............................................H26
FCEV mode ................................................................H21
Fuel filler door ............................................................H12
How to Start the Vehicle .............................................H10
How to Stop the Vehicle .............................................H11
If the 12 volt battery is discharged .............................H25
LCD Display Messages ..............................................H16
Virtual Engine Sound System .....................................H11
Warning and indicator lights.......................................H15
When the high voltage battery is weak ......................H25
Floor Mat Anchor(s) .....................................................3-172
Forward Collision-Avoidance Assist (FCA) System ......5-39 FCA Sensor (Front Radar/Front View Camera).........5-44
FCA Warning Message and System Control..............5-41
Limitations of the System ..........................................5-47
System Malfunction ...................................................5-46
System Setting and Activation ...................................5-39
Front air ventilation seat .................................................2-19
Front seat warmers..........................................................2-17
Front Seats ........................................................................2-6
Index
E
F