fuel type HYUNDAI NEXO 2023 Owners Manual

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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7
Maintenance
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A vehicle's electrical system is pro-
tected from electrical overload dam-
age by fuses.
This vehicle has 2 (or 3) fuse panels,
one located in the driver's side panel
bolster, the other in the fuel cell
power module compartment near the
battery. If any of your vehicle’s lights, acces-
sories, or controls do not work, check
the appropriate circuit fuse. If a fuse
has blown, the element inside the
fuse will be melted or broken.
If the electrical system does not
work, first check the driver's side
fuse panel. Before replacing a blown
fuse, turn the vehicle and all switch-
es off, and then disconnect the neg-
ative battery cable. Always replace a
blown fuse with one of the same rat-ing.
If the replacement fuse blows, this
indicates an electrical problem. Avoid
using the system involved and imme-
diately consult an authorized
HYUNDAI dealer.
Information
Three kinds of fuses are used: blade
type for lower amperage rating, car-
tridge type, and multi fuse for higher
amperage ratings.
i
NEVER replace a fuse with any-
thing but another fuse of thesame rating.
A higher capacity fuse could
cause damage and possibly
cause a fire.
Do not install a wire or alu-
minum foil instead of the
proper fuse - even as a tem-
porary repair. It may cause
extensive wiring damage and
possibly a fire.
WARNING
Normal
■
Blade type
■ Cartridge type Blown
Normal Blown
OAEE076008
Normal
Blown
■ Multi fuse

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7
Maintenance
In an emergency, if you do not have
a spare fuse, use a fuse of the same
rating from a circuit you may not
need for operating the vehicle.
If the headlamps or other electrical
components do not work and the
fuses are OK, check the fuse panel
in the fuel cell power module com-
partment. If a fuse is blown, it must
be replaced with the same rating.Fuel Cell Power Module
Compartment Panel FuseReplacement
Blade / Cartridge type
1. Turn the vehicle off.
2. Turn all other switches OFF.
3. Remove the fuse panel cover bypressing the tap and pulling up. 4. Check the removed fuse; replace
it if it is blown. To remove or insert
the fuse, use the fuse puller in the
motor compartment fuse panel.
5. Push in a new fuse of the same rating, and make sure it fits tightly
in the clips. If it fits loosely, consult
an authorized HYUNDAI dealer.
OFE078021

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7
Maintenance
Motor compartment fuse panel
TypeFuse NameFuse RatingCircuit Protected
FUSE
HVJB LV15AHV Junction Block
RCU15ADriver / Passenger Auto Flush Door Handle Module,
Rear Auto Flush Door Handle Module LH/RH
FUEL DOOROPEN7.5AICM Relay Box (Fuel Filler Door Relay)
E-SHIFTER40APE Room Junction Block (E-Shifter Relay)
INVERTER30AAC Inverter
REAR
HEATED40APE Room Junction Block (Rear Heated Relay)
B+150AICU Junction Block ((Fuse - MODULE1, AIR BAG2, MODULE8,
S/HEATER RR, DOOR LOCK, IBU1, BRAKE SWITCH), Leak Current Autocut Relay)
POWER
TAIL GATE30APower Tail Gate Module
WIPER FRT30AFront Wiper Motor
COOLING
STACK PUMP10AStack Coolant Pump (CSP)
INVERTER LV7.5AInverter

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Maintenance
TypeFuse NameFuse RatingCircuit Protected
FUSE
BHDC7.5AIDC
HMU110AHMU
BATTERY
MANAGEMENT10ABMS Control Module
FUEL CELL
CONTROL UNIT15AFCU
BMS FAN15APE Room Junction Block (BMS FAN Relay)
Motor compartment fuse panel

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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.
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