2020 HYUNDAI NEXO reset

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 need
to 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 wheel
weights.
Tire Replacement
If the tire is worn evenly, a tread wear
indicator will appear as a solid band
across the tread. This shows there is
less than 1/16 inch (1.6 mm) 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, and
traction.
Always replace tires with the
same size as each tire that
was originally supplied with
this vehicle. Using tires and
wheels 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 serious
accident.
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 reset
switch
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

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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.
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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? If
yes, 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 the
drive 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 manual
chapter 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 cooling
coolant 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 long
period, 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, turn
off 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 2 miles (3 km) 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.
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I-2
12V battery......................................................................7-27
Battery recharging ......................................................7-28
Reset Features ............................................................7-28
AC Inverter ...................................................................3-167
Accessing Your Vehicle ....................................................3-3
Smart Key.....................................................................3-3
Immobilizer System .....................................................3-9
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
Where Are the Air Bags? ...........................................2-49
How Does the Air Bag System Operate? ...................2-52
What to Expect After an Air Bag Inflates ..................2-57
Occupant Classification System (OCS) .....................2-58
Why Didn't My Air Bag Go Off in a Collision?........2-60
SRS Care ....................................................................2-60
Additional Safety Precautions ....................................2-60
Air Bag Warning Labels.............................................2-60
Why Didn't My Air Bag Go Off in a Collision?........2-63
SRS Care ....................................................................2-68
Additional Safety Precautions ....................................2-69
Air Bag Warning Labels.............................................2-69Air 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 Operation .....................................................3-155
System Maintenance ................................................3-156
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
System Description ....................................................5-53
System Setting and Activation ...................................5-54
Warning and System Control .....................................5-57
Detecting Sensor (Front View Camera and
Rear Corner Radar) .................................................5-59
Limitations of the System ..........................................5-62
Index
A
B

I-4
Driver Assist System.....................................................3-105
Parking Distance Warning (Reverse/Forward)
System ...................................................................3-105
Rear View Monitor ...................................................3-109
Surround View Monitoring ......................................3-110
Driver Attention Warning (DAW) System......................5-94
System Setting and Activation ...................................5-94
Resetting the System ..................................................5-95
System Standby ..........................................................5-96
System Malfunction ...................................................5-96
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 Care ...................................................................7-62
Exterior Features .............................................................3-42
Hood ...........................................................................3-42
Non-Powered Liftgate ................................................3-43
Power Liftgate ............................................................3-45
Smart Liftgate.............................................................3-51
Fuel Filler Door ..........................................................3-55
Emergency Fuel Filler Door Release .........................3-57Exterior Features ...........................................................3-176
Roof Side Rails ........................................................3-176
Exterior Lights ................................................................3-89
Exterior Overview.............................................................1-2
Features of FCEV............................................................H10
How to Start the Vehicle .............................................H10
How to Stop the Vehicle .............................................H11
Virtual Engine Sound System .....................................H11
Fuel filler door ............................................................H12
Warning and indicator lights.......................................H15
LCD Display Messages ..............................................H16
FCEV mode ................................................................H21
When the high voltage battery is weak ......................H25
If the 12 volt battery is discharged .............................H25
Emergency while driving............................................H26
Floor Mat Anchor(s) .....................................................3-172
Forward Collision-avoidance Assist (FCA) System.......5-39
System Setting and Activation ...................................5-39
FCA Warning Message and System Control..............5-41
FCA Sensor (Front Radar/Front View Camera).........5-44
System Malfunction ...................................................5-46
Limitations of the System ..........................................5-47
Index
E
F

I-9
Smart Cruise Control Vehicle-to-Vehicle Distance ..5-105
Sensor to Detect Distance to the Vehicle Ahead ......5-108
Limitations of the System ........................................5-110
Smart Key .........................................................................3-3
Smart Liftgate .................................................................3-51
Snow Tires ......................................................................7-42
Special Driving Conditions ...........................................5-118
Hazardous Driving Conditions .................................5-118
Rocking the Vehicle..................................................5-118
Smooth Cornering ....................................................5-119
Driving at Night........................................................5-119
Driving in the Rain ...................................................5-119
Driving in Flooded Areas .........................................5-120
Highway Driving ......................................................5-120
Reducing the Risk of a Rollover ..............................5-121
Stack cooling coolant ......................................................7-16
Checking the Coolant Level .......................................7-16
Changing Coolant.......................................................7-18
Steering Wheel ................................................................3-20
Electric Power Steering (EPS) ...................................3-20
Tilt Steering/Telescope Steering.................................3-21
Horn ............................................................................3-22
Heated Steering Wheel ...............................................3-22
Storage Compartment ...................................................3-163
Center Console Storage ............................................3-163
Glove Box ................................................................3-163Sunroof............................................................................3-37
Sunroof Opening and Closing ....................................3-38
Sliding the Sunroof ....................................................3-38
Tilting the Sunroof .....................................................3-39
Sunshade.....................................................................3-39
Resetting the Sunroof .................................................3-40
Sunroof Open Warning...............................................3-41
Sunvisor ........................................................................3-164
Surround View Monitoring ...........................................3-110
The components of FCEV.................................................H3
FCEV system module ...................................................H4
High pressure hydrogen storage tanks..........................H5
Battery system ..............................................................H5
Theft-Alarm System .......................................................3-19
Tilt Steering/Telescope Steering .....................................3-21
Tire Pressure Monitoring System (TPMS) .....................6-11
Check Tire Pressure ....................................................6-11
Tire Pressure Monitoring System...............................6-12
Low Tire Pressure Telltale..........................................6-13
Low Tire Pressure LCD Display with Position
Indicator ..................................................................6-13
TPMS Malfunction Indicator .....................................6-14
Changing a Tire with TPMS ......................................6-15
Tire Specification and Pressure Label ..............................8-8
I
Index
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