2019 Hyundai Nexo Owner's Manual

H41
CategoryQuestionsAnswers
HydrogenSystem
(7 items)
37. Is it possible that water, oil, etc. may be introduced to the hydrogen gas tank via
the fuel filler? If yes, what do I need to
do to prevent this?Normally, water and oil cannot flow into the hydrogen tank via the
fuel filler, but it can flow in while refueling. Be careful not to intro-
duce any contaminants via the fuel filler.
38. While refueling the hydrogen, I hearirregular abnormal noises. Is this noise
cause for concern?
The hydrogen gas is in high pressure (70 MPa) condition when refu-
eled to the vehicle's storage tank. Therefore, you will hear the sound
of the gas flowing in the beginning. Abnormal noise is occurred due
to the gas flow because of the difference in refueling pressure, etc.
depending on the gas pressure condition at the refueling station and
this is very normal.

H42
CategoryQuestionsAnswers
Fuel Cell
Stack/High VoltageBattery
(4 items)
39. What happens if hydrogen gas leaks from the fuel cell stack?
(Red)If hydrogen gas leaks beyond what's tolerable from the fuel cell stack,
a hydrogen sensor installed in the system detects the leak and in
response, turns ON the hydrogen gas leak warning light in the cluster.
40. Can the fuel cell stack explode or burnout due to overheating?The fuel cell stack passed a high temperature test and is deemed
safe, so it is unlikely to explode.
41. Which symptoms occur if the fuel cellsystem malfunctions?
If the fuel cell system malfunctions, warning lights specific to the
actual problem appear on the LCD display. When this happens, the
vehicle speed may be limited, or the fuel cell system may shut
down. DO NOT lose your composure if this happens. Park your vehi-
cle and turn OFF the vehicle. Then, contact an authorized HYUNDAI
dealer for service.
42. Is the recharge performance of the highvoltage battery reduced depending on
its length of use? Like any vehicle component, the high voltage battery will decrease
in performance as it ages over time. However, the high voltage bat-
tery of the FCEV is durable enough to work at peak performance
beyond the warranty period.
C CU
U S
ST
T O
O M
M E
ER
R
Q
Q &
&A
A
G
G U
U I
ID
D E
E
(
( C
C O
O N
NT
T.
.)
)

H43
CategoryQuestionsAnswers
Vehicle
Accidents/ Towing
(5 items)
43. Is there a risk of electric shock from the high-voltage parts in the event of a colli-
sion or accident?
The FCEV is designed to detect impact events during a collision or
accident so that the hydrogen gas supply is immediately cutoff. Also,
the high-voltage relay is activated to cutoff the supply of electric power
to the fuel cell stack and high-voltage battery. Moreover, the FCEV
satisfies international electrical safety standards for collisions and
accidents.
44. Should I take any special safety precau-tions in the event of a collision or acci-
dent?
Despite the uniqueness of the hydrogen FCEV, you do not have to
take any special safety precautions in the event of a minor collision or
accident. In the event of a minor accident, turn off the vehicle to cutoff
the supply of electric power and hydrogen gas. Also, the FCEV is
equipped with collision sensors at the front and rear of the vehicle so
those sensors are activated during an actual collision to automatically
cutoff the supply of power and hydrogen to ensure driver and passen-
ger safety. For other situations, follow the same procedures as you
would with a standard vehicle. Depending on the severity of the colli-
sion or accident, take appropriate measures.
45. Is a high-voltage battery designed toensure occupant safety? Can it explode
from a collision?Our battery packs are designed to prevent any explosion due to
physical impact or damage, and they fully satisfy international safety
standards.

H44
CategoryQuestionsAnswers
Vehicle
Accidents/ Towing
(5 items)
46. Is a hydrogen tank designed to ensure occupant safety? Can it explode from a
collision?The hydrogen tank is designed to prevent any risk of explosion. It is
completely safe.
47. How should the FCEV be towed, andwhat precautions should be taken?
The FCEV can be towed in the same manner as standard vehicles. If
you need emergency towing, it is recommended that you contact an
authorized HYUNDAI dealer. To avoid damage to the vehicle, you
need to follow proper pulling and towing procedures. The FCEV is
equipped with a front wheel drive (FWD) motor, so use a flatbed or
wheel dolly to tow the vehicle. If the front wheels touch the road sur-
face while being towed, they will rotate and this can cause the FWD
motor to generate electricity. This can cause unwanted failure of the
FCEV.
C CU
U S
ST
T O
O M
M E
ER
R
Q
Q &
&A
A
G
G U
U I
ID
D E
E
(
( C
C O
O N
NT
T.
.)
)

H45
CategoryQuestionsAnswers
Explosion or
Fire (5 items)
48. What should I do if the FCEV catches fire?
1. stop driving the car. Move the shift to P (Park), then step on thebrake to turn OFF the vehicle. The fuel cell stack is shut down,
which cuts off the supply of hydrogen fuel.
2. If possible, open the windows to ventilate the air.
3. If the fire is small enough to get under your own control, use the fire extinguisher to put it out.
If the fire is much larger, get out of your car and contact the local
fire station to report your FECV is on fire. DO NOT get close to your
car before the fire is completely extinguished.
49. In case of vehicle fire, should I use the fire extinguisher? Can I use water to
extinguish the fire?
In the event your FCEV catches fire with the power system OFF, the
power source of the high-voltage system is cut off, so you are unlikely
to get shocked while you put out the fire using water. (Even when the
vehicle is submerged in water, there is no risk of getting shocked.)
However, if your car catches fire with the ignition ON, you MUST use
the fire extinguisher. Any attempt to extinguish the fire with water may
cause electric shock.
50. What kind of fire extinguisher should Iuse?It is recommended that you use a dedicated fire extinguisher (CO2)
for an electrical fire of the high-voltage system.
51. Can the hydrogen tank explode if itoverheats in very hot weather?The hydrogen tank passed a high temperature test and is deemed
safe, so it is unlikely to explode.
52. In case of vehicle fire, is it possible thatthe hydrogen tank will explode?
In case of vehicle fire, a heat-sensitive safety valve is activated to
exhaust the hydrogen gas downward from the tank by force.
Therefore, the hydrogen tank is unlikely to explode. However, addi-
tional flames can flare up from the forced exhaustion of the gas, so
please evacuate to a safe place far away from the vehicle.

I
Index
I

I-2
12V battery......................................................................7-\
27Battery recharging ......................................................7-28
Reset Features ............................................................7-28
AC Inverter ...................................................................3-166\
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.............................................2-69 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..............................3-146 Automatic Temperature Control Mode ....................3-147
Manual Temperature Control Mode .........................3-147
System Operation .....................................................3-154
System Maintenance ................................................3-155
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-3
Blind-Spot View Monitor System ..................................5-77Operating conditions ..................................................5-77
Blind-Spot View Monitor system warning ................5-78
Brake fluid ......................................................................7-\
19 Checking the Brake Fluid Level ................................7-19
Braking System ...............................................................5-18 Power Brakes..............................................................5-18
Disc Brake Wear Indicator .........................................5-19
Electronic Parking Brake (EPB) ................................5-19
Auto Hold ...................................................................5-25
Anti-lock Brake System (ABS)..................................5-29
Electronic Stability Control (ESC).............................5-31
Vehicle Stability Management (VSM) .......................5-34
Hill-Start Assist Control (HAC) .................................5-36
Good Braking Practices..............................................5-36
Bulb Wattage .....................................................................8-3\
California perchlorate notice ..........................................7-70
Cargo Security Screen ..................................................3-173
Center Console Storage ................................................3-162
Child Restraint System (CRS) ........................................2-36 Children Always in the Rear ......................................2-36
Selecting a Child Restraint System (CRS).................2-37
Installing a Child Restraint System (CRS) ................2-39
Child-Protector Rear Door Locks ...................................3-18 Climate Control Additional Features ............................3-161
Automatic Ventilation...............................................3-161
Sunroof Inside Air Recirculation .............................3-161
Climate control air filter .................................................7-22 Filter Inspection..........................................................7-22
Clock ........................................................................\
.....3-170
Coat Hook .....................................................................3-1\
71
Consumer Information ......................................................8-9
Cup Holder....................................................................3-16\
3
Customer Q&A Guide (FCEV) .......................................H30
Device cooling coolant ...................................................7-13 Checking the Coolant Level .......................................7-13
Changing Coolant.......................................................7-15
Dimensions .......................................................................8\
-2
Disc Brake Wear Indicator..............................................5-19
Door Locks......................................................................3-\
11 Door unlocking from outside the vehicle...................3-11
Door locking from outside the vehicle.......................3-14
Operating Door Locks from Inside the Vehicle .........3-14
Automatic Door Lock and Unlock Features ..............3-17
Child-Protector Rear Door Locks ..............................3-18
Drive Mode Integrated Control System .........................5-37 Drive mode change alert ............................................5-38
ECO mode climate control .........................................5-38
I
Index
C
D