2023 HYUNDAI NEXO ECU

5-46
Driving your vehicle
System Malfunction
Check Forward Collision Avoidance
Assist system
When the FCA is not working prop-erly, the FCA warning light ( )
will illuminate and the warning
message will appear for a few sec-
onds. After the message disap-
pears, the master warning light
( ) will illuminate. In this case,
have the vehicle inspected by an
authorized HYUNDAI dealer.
The FCA warning message may appear along with the illuminationof the ESC (Electronic Stability
Control) warning light.
The FCA is only a supplemen-
tal system for the driver’s con-
venience. The driver shouldhold the responsibility to con-
trol the vehicle operation. Do
not solely depend on the FCA
system. Rather, maintain a
safe braking distance, and, if
necessary, depress the brakepedal to reduce the drivingspeed.
In certain instances and
under certain driving condi-
tions, the FCA system may
activate unintentionally. This
initial warning message
appears on the LCD display
with a warning chime.
Also, in certain instances the
front radar sensor or camera
recognition system may not
detect the vehicle, pedestrian
or cyclists ahead. The FCA
system may not activate and
the warning message will not
be displayed.
WARNING Even if there is any problem
with the brake control func-
tion of the FCA system, the
vehicle's basic braking per-
formance will operate normal-
ly. However, brake control
function for avoiding collision
will not activate.
If the vehicle in front stops
suddenly, you may have less
control of the brake system.
Therefore, always keep a safe
distance between your vehicle
and the vehicle in front of you.
The FCA system may activate during braking and the vehi-
cle may stop suddenly shift-
ing loose objects toward the
passengers. Always keeploose objects secured.
The FCA system may not acti-
vate if the driver applies the
brake pedal to avoid a colli-sion.
The brake control may not
work, possibly causing a colli-
sion, if a vehicle in front
abruptly stops. Always pay
extreme caution.
OFE058148L

5-130
Driving your vehicle
We do not recommend using this vehicle for trailer towing.
TTRR AA IILL EE RR TT OO WW IINN GG
If you carry items inside your
vehicle (e.g., suitcases, tools,
packages, or anything else),
they are moving as fast as the
vehicle. If you have to stop or
turn quickly, or if there is a
crash, the items will keep going
and can cause an injury if they
strike the driver or a passenger.
Put items in the cargo area of
your vehicle. Try to spread the
weight evenly.
Do not stack items, like suit-
cases, inside the vehicle
above the tops of the seats.
Do not leave an unsecured
child restraint in your vehicle.
When you carry something
inside the vehicle, secure it.
WARNING

6-21
What to do in an emergency
6
4. Unscrew the valve cap from thevalve of the defective wheel and
screw the filling hose (3) of the
sealant bottle onto the valve. 5. Plug the compressor power cord
(4) into the vehicle power outlet.
6. With the vehicle ON ( indica- tor ON), switch on the compressor
and let it run for approximately
5~7 minutes to fill the sealant up
to proper pressure. (refer to the
Tire and Wheels, chapter 8). Theinflation pressure of the tire after
filling is unimportant and will be
checked/corrected later.
Be careful not to overinflate the
tire and stay away from the tirewhen filling it. 7. Switch off the compressor.
8. Detach the hoses from the sealant
bottle connector and from the tire
valve.
Return the Tire Mobility Kit to its stor-
age location in the vehicle.
OFE068015OFE068016
Securely install the sealant fill-
ing hose to the valve. If not,
sealant may flow backward,
possibly clogging the filling
hose.
CAUTION
Do not attempt to drive your
vehicle if the tire pressure is
below 200 kpa (29 psi). Thiscould result in an accident due
to sudden tire failure.
CAUTION
Do not the filling leave your
vehicle running in a poorly ven-
tilated area for extended peri-
ods of time. Carbon monoxide
poisoning and suffocation can
occur.
WARNING

6-25
What to do in an emergency
6
When towing your vehicle in an emergency without wheel dollies:
1. Place the POWER button in theACC position.
2. Place the shift button in N (Neutral).
3. Release the parking brake.
Removable Towing Hook
1. Open the tailgate, and remove the towing hook from the tool case. 2. Remove the hole cover by press-
ing the lower part of the cover on
the front or rear bumper.
3. Install the towing hook by turning it clockwise into the hole until it isfully secured.
4. Remove the towing hook and install the cover after use.
If your vehicle is equipped with
a rollover sensor, place the
POWER button in the LOCK/
OFF or ACC position when the
vehicle is being towed. The side
impact and curtain air bag may
deploy if the sensor detects the
situation as a rollover.WARNING
Failure to place the shift button
in N (Neutral) when being towed
with the front wheels on the
ground can cause internal dam-
age to the vehicle.
CAUTION
OFE068018
■
Front
OFE068019
■Rear

6-26
Emergency Towing
If towing is necessary, we recom-
mend you have it done by an author-
ized HYUNDAI dealer or a commer-
cial tow truck service.
If towing service is not available in an
emergency, your vehicle may be
temporarily towed using a cable or
chain secured to the emergency tow-ing hook at the front (or rear) of the
vehicle.
Use extreme caution when towing
the vehicle with a cable or chain. A
driver must be in the vehicle to steer
it and operate the brakes.
Towing in this manner may be done
only on hard-surfaced roads for a
short distance and at low speeds.
Also, the wheels, axles, power train,
steering and brakes must all be ingood condition.Always follow these emergency tow-ing precautions:
While depressing the brake pedal
shift to the N (Neutral) position and
turn the vehicle off. The POWER
button will be in the ACC position.
Release the parking brake.
Depress the brake pedal with more force than normal since you will
have reduced braking perform-
ance.
More steering effort will be required because the power steer-
ing system will be disabled.
Use a vehicle heavier than your own to tow your vehicle.
The drivers of both vehicles should communicate with each other fre-
quently.
Before emergency towing, check that the hook is not broken or dam-aged.
Fasten the towing cable or chain securely to the hook.
Do not jerk the hook. Apply steady and even force.
What to do in an emergency
The driver must be in the vehi-
cle for steering and braking
operations when the vehicle is
being towed. Passengers other
than the driver must not be in
the vehicle.
CAUTION

7-48
Maintenance
Multi fuse
If the multi fuse is blown, it must be
removed as follows:
1. Turn the vehicle off.
2. Disconnect the negative batteryconnector located on the trunk.
3. Remove the fuse panel cover by pressing the tab and pulling it up.
4. Remove the nuts shown in the pic- ture above.
5. Replace the fuse with a new one of the same rating.
6. Reinstall in the reverse order of removal. Information
If the multi fuse is blown, consult an
authorized HYUNDAI dealer.
i
OFE078022
After checking the fuse box in
the fuel cell power module com-
partment securely close the
fuse box cover inside the motor
compartment, until it clicks.
If the fuse box is not closed
properly, water may leak in side,
possibly causing a malfunctionwith the electrical system.
CAUTION

H13
Information
If the fuel filler door does not open
because ice has formed around it, tap
lightly or push on the door to break
the ice and release the door. Do not
pry on the door. If necessary, spray
around the door with an approved de-
icer fluid (do not use radiator anti-
freeze) or move the vehicle to a warm
place and allow the ice to melt.Closing the fuel filler door
1. Cover the fuel filler with the cap.
2. Close the fuel filler door until it is latched securely.i
If the fuel filler cap requires
replacement, use parts for
replacement from an author-
ized Hyundai dealer. An incor-rect fuel filler cap can result ina serious malfunction of the
fuel system. Contact an
authorized HYUNDAI dealer
for replacement.
If the fuel filler door is not
completely closed, the vehicle
is not turned on. Close thefuel filler door and turn on the
vehicle.
WARNING
According to the hydrogen fueling station condition the
hydrogen may not be filled
fully and the driving distance
may change accordingly. The
hydrogen may not be charged
fully if the fueling station doesnot satisfy the fueling method
specified in the fueling. stan-
dard (SAE J2601) or if the
hydrogen is not enough in the
station, the fueling facility
has failure, etc.
Depending on the remaining
hydrogen in the vehicle and
ambient temperature, the time
required for fueling may vary.
More time may be required for
fueling if the remaining hydro-
gen level is low and the
weather is hot. Also, required
time may be longer if the
hydrogen cooling tempera-ture of the fueling station ishigh.
The distance to empty may
vary depending on the driving
environment (weather, traffic,etc.) and driving method
(rapid acceleration, heating
and air conditioning, etc.).WARNING

H14
Do not get back into a vehicle
once you have begun refuel-
ing since you can generate
static electricity by touching,
rubbing or sliding against any
item or fabric (polyester, satin,
nylon, etc.) capable of produc-
ing static electricity. Static
electricity discharge can
ignite fuel vapors resulting in
rapid burning. If you must re-
enter the vehicle, you should
once again eliminate poten-
tially dangerous static elec-
tricity discharge by touching a
metal part of the vehicle, away
from the fuel filler neck, noz-
zle or other gasoline source.
Do not use cellular phones
while refueling. Electric cur-
rent and/or electronic interfer-
ence from cellular phones can
potentially ignite fuel vapors
causing a fire.
When refueling, always shut
the power off. Once refueling
is complete, check to makesure the fuel filler cap and fuel
filler door are securely closed,
before starting the vehicle.
DO NOT use matches or a
lighter and DO NOT SMOKE or
leave a lit cigarette in your
vehicle while at a gas station
especially during refueling.
Automotive fuel is highly
flammable and can, when
ignited, result in fire.
If a fire breaks out during refu-
eling, leave the vicinity of the
vehicle, and immediately con-
tact the manager of the gasstation and then contact the
local fire department. Follow
any safety instructions they
provide.
FFEE AA TTUU RREESS OO FF FF CC EE VV (( CC OO NNTT..))
Refueling dangers
Automotive fuels are flammable
materials. When refueling,
please note the following guide-
lines carefully. Failure to follow
these guidelines may result in
severe personal injury, severe
burns or death by fire or explo-sion.
Read and follow all warning posted at the gas station facil-
ity.
Before touching the fuel noz-
zle, you should eliminate
potentially dangerous static
electricity discharge by touch-
ing another metal part of the
vehicle, a safe distance away
from the fuel filler neck, noz-
zle, or other gas source.
WARNING