Hyundai Nexo (2024 year). Manual in english - page 16

 

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Hyundai Nexo (2024 year). Manual in english - page 16

 

 

6-23

W

hat to do in an emer

g

ency

6

13. Adjust the tire inflation pressure

to the recommended tire infla-
tion.

With the vehicle ON (

indica-

tor ON), on, proceed as follows.

- To increase the inflation pres-

sure: 

Switch on the compressor. To
check the current inflation pres-
sure setting, briefly switch off
the compressor.

- To reduce the inflation pres-

sure: 

Press the button (9) on the
compressor.

Information

The pressure gauge may show higher
than actual reading when the com-
pressor is running. To get an accurate
tire pressure, the compressor needs to
be turned off.

Information

When reinstalling the repaired or
replaced tire and wheel on the vehicle,
tighten the wheel lug nut to 79~94
lbf·ft (11~13 kgf·m).

i

i

When you use the Tire Mobility Kit
including sealant not approved by
HYUNDAI, the tire pressure sen-
sors may be damaged by sealant.
The sealant on the tire pressure
sensor and wheel should be
removed when you replace the
tire with a new one and inspect
the tire pressure sensors at an
authorized dealer.

CAUTION

The tire inflation pressure must
be at least 32 psi (220 kPa). If it
is not, do not continue driving.
Call for road side service or
towing.

WARNING  

6-24

What to do in an emergency

Towing Service

[A] : Dollies

If emergency towing is necessary,
have it done by an authorized
HYUNDAI dealer or a commercial
tow-truck service. Proper lifting and
towing procedures are necessary to
prevent damage to the vehicle. The
use of wheel dollies or flatbed is rec-
ommended.

It is acceptable to tow the vehicle
with the rear wheels on the ground
(without dollies) and the front wheels
off the ground. If any of the loaded
wheels or suspension components
are damaged or the vehicle is being
towed with the front wheels on the
ground, use a towing dolly under the
front wheels.
When being towed by a commercial
tow truck and wheel dollies are not
used, the front of the vehicle should
always be lifted, not the rear.

• Do not tow the vehicle with the

front wheels on the ground as
this may cause damage to the
vehicle.

• Do not tow with sling-type

equipment. Use a wheel lift or
flatbed equipment.

NOTICE

T

TO

OW

WIIN

NG

G

OFE068017N

OFE068026

OFE068025

6-25

W

hat to do in an emer

g

ency

6

When towing your vehicle in an
emergency without wheel dollies:
1. Place the POWER button in the

ACC position.

2. Place the shift button in N

(Neutral).

3. Release the parking brake.

Removable Towing  Hook

1. Open the liftgate, and remove the

towing hook from the tool case.

2. Remove the hole cover by press-

ing the cover on the front or rear
bumper.

3. Install the towing hook by turning it

clockwise into the hole until it is
fully 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, have it done
by an authorized HYUNDAI dealer or
a commercial 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 in
good 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

OFE068018

Front

OFE068019

Rear

6-27

W

hat to do in an emer

g

ency

• Use a towing cable or chain less

than 16 feet (5 m) long. Attach a
white or red cloth (about 12 inch
(30 cm) wide) in the middle of the
cable or chain for easy visibility.

• Drive carefully so the towing cable

or chain remains tight during tow-
ing.

• Before towing, check the reduction

gear for fluid leaks under your vehi-
cle. If the reduction gear is leaking,
flatbed equipment or a towing dolly
must be used.

Accelerate or decelerate the vehi-
cle in a slow and gradual manner
while maintaining tension on the
tow rope or chain to start or drive
the vehicle, otherwise tow hooks
and the vehicle may be damaged.

To avoid damage to your vehicle
and vehicle components when
towing:
• Always pull straight ahead when

using the towing hooks. Do not
pull from the side or at a vertical
angle.

• Do not use the towing hooks to

pull a vehicle out of mud, sand
or other conditions from which
the vehicle cannot be driven out
under its own power.

• Limit the vehicle speed to 

10 mph (15 km/h) and drive less
than 1 mile (1.5 km) when towing
to avoid serious damage to the
reduction gear.

NOTICE

NOTICE

6

OFE068022

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

Maintenance

7

Maintenance

Fuel Cell Power Module Compartment Overview7-3
Maintenance Services ...........................................7-4

Owner's Responsibility.....................................................7-4
Owner Maintenance Precautions..................................7-4

Owner Maintenance ..............................................7-5

Owner maintenance schedule........................................7-6

Scheduled Maintenance Services........................7-7

Normal Maintenance Schedule ......................................7-8
Maintenance Under Severe Usage Conditions ........7-10

Explanation of Scheduled Maintenance Items.7-12
Device Cooling Coolant .......................................7-13

Checking the Coolant Level ..........................................7-13
Changing Coolant ...........................................................7-15

Stack Cooling Coolant .........................................7-16

Checking the Coolant Level ..........................................7-16
Changing Coolant ...........................................................7-18

Brake Fluid............................................................7-19

Checking the Brake Fluid Level...................................7-19

Washer Fluid .........................................................7-20

Checking the Washer Fluid Level................................7-20

Air Cleaner ............................................................7-20

Filter Replacement ..........................................................7-20

Climate Control Air Filter ....................................7-22

Filter Inspection...............................................................7-22

Wiper Blades.........................................................7-24

Blade Inspection ..............................................................7-24
Blade Replacement .........................................................7-24

12V Battery...........................................................7-27

Battery recharging .........................................................7-28
Reset Features.................................................................7-28

Tires and Wheels .................................................7-29

Tire Care............................................................................7-29
Recommended Cold Tire Inflation Pressures ...........7-30
Check Tire Inflation Pressure ......................................7-31
Tire Rotation  ...................................................................7-32
Wheel Alignment and Tire Balance ............................7-33
Tire Replacement ............................................................7-33
Wheel Replacement ........................................................7-34
Tire Traction ....................................................................7-34
Tire Maintenance ............................................................7-34
Tire Sidewall Labeling ....................................................7-34
Tire Terminology and Definitions  ..............................7-38
All Season Tires...............................................................7-42
Summer Tires ...................................................................7-42
Snow Tires ........................................................................7-42
Radial-Ply Tires ...............................................................7-42
Low Aspect Ratio Tires..................................................7-43

7

7

Fuses......................................................................7-45

Instrument Panel Fuse Replacement  .......................7-46
Fuel cell power module compartment Panel Fuse
Replacement .....................................................................7-47
Fuse/Relay Panel Description......................................7-49

Light Bulbs ............................................................7-57

Headlight, front center lamp, turn signal lamp, 
daytime running lamp, parking lamp, side marker
replacement ......................................................................7-58
Side Repeater Lamp Replacement ..............................7-58
Rear Combination Light Bulb Replacement .............7-59
High mounted stop lamp ...............................................7-59
License Plate Light Bulb Replacement  .....................7-60
Interior Light Bulb Replacement .................................7-60

Appearance Care..................................................7-62

Exterior Care ....................................................................7-62
Interior Care .....................................................................7-67

California Perchlorate Notice.............................7-70

7-3

7

Maintenance

F

FU

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EL

L  C

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MO

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DU

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MP

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RV

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EW

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1. Brake fluid reservoir

2. Air cleaner 

3. Fuse box 

4. Windshield washer fluid reservoir 

5. Device cooling coolant reservoir 

6. Traction motor radiator cap 

7. Stack cooling coolant reservoir 

8. Fuel cell stack radiator cap

OFE071001N

The actual fuel cell power module compartment in the vehicle may differ from the illus-
tration.

7-4

Maintenance

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You should exercise the utmost care
to prevent damage to your vehicle
and injury to yourself whenever per-
forming any maintenance or inspec-
tion procedures.
Have your vehicle maintained and
repaired by an authorized HYUNDAI
dealer. An authorized HYUNDAI
dealer meets HYUNDAI's high serv-
ice quality standards and receives
technical support from HYUNDAI in
order to provide you with a high level
of service satisfaction.

Owner's Responsibility

Maintenance service and record
retention are the owner's responsibil-
ity.
You should retain documents that
show proper maintenance has been
performed on your vehicle in accor-
dance with the scheduled mainte-
nance service charts shown on the
following pages. You need this infor-
mation to establish your compliance
with the servicing and maintenance
requirements of your vehicle war-
ranties.
Detailed warranty information is pro-
vided in your Owner's Handbook &
Warranty Information booklet.
Repairs and adjustments required as
a result of improper maintenance or
a lack of required maintenance are
not covered.

Owner Maintenance
Precautions

Inadequate, incomplete or insuffi-
cient servicing may result in opera-
tional problems with your vehicle that
could lead to vehicle damage, an
accident, or personal injury. This
chapter provides instructions only for
the maintenance items that are easy
to perform. Several procedures can
be done only by an authorized
HYUNDAI dealer with special tools.
Your vehicle should not be modified
in any way. Such modifications may
adversely affect the performance,
safety or durability of your vehicle
and may, in addition, violate condi-
tions of the limited warranties cover-
ing the vehicle.
Certain modifications may also be in
violation of regulations established
by the U.S.

Department of

Transportation and other federal or
state agencies.

High voltage caution
Do not disassemble or perform
maintenance on the fuel cell
system unless you are quali-
fied. The fuel cell system can be
highly dangerous since there
are many high voltage parts
inside even if when power is off.

WARNING

7-5

7

Maintenance

Improper owner maintenance dur-
ing the warranty period may affect
warranty coverage. For details,
read the separate Owner's
Handbook & Warranty Information
booklet provided with the vehicle.
If you're unsure about any service
or maintenance procedure, have it
done by an authorized HYUNDAI
dealer.

The following lists are vehicle checks
and inspections that should be per-
formed by the owner or an author-
ized HYUNDAI dealer at the frequen-
cies indicated to help ensure safe,
dependable operation of your vehi-
cle.
Any adverse conditions should be
brought to the attention of your deal-
er as soon as possible.
These Owner Maintenance vehicle
checks are generally not covered by
warranties and you may be charged
for labor, parts and lubricants used.

NOTICE

Performing maintenance work
on a vehicle can be dangerous.
If you lack sufficient knowledge
and experience or the proper
tools and equipment to do the
work, have it done by an author-
ized HYUNDAI dealer.
ALWAYS follow these precau-
tions for performing mainte-
nance work:

Park your vehicle on level
ground, shift to the P (Park)
position, apply the parking
brake, and place the POWER
button in the OFF position.

Block the tires (front and
back) to prevent the vehicle
from moving.
Remove loose clothing or jew-
elry that can become entan-
gled in moving parts.

Keep flames, sparks, or smok-
ing materials away from the
battery related parts.

WARNING 

O

OW

WN

NE

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R  M

MA

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E

7-6

Maintenance

Owner maintenance schedule

When you stop for fuel:

• Check for both fuel cell stack and

Device cooling coolant level in
coolant reservoir.

• Check the windshield washer fluid

level.

• Look for low or under-inflated tires.

While operating your vehicle:

• Check for vibrations in the steering

wheel. Notice if there is any
increased steering effort or loose-
ness in the steering wheel, or
change in its straight-ahead posi-
tion.

• Notice if your vehicle constantly

turns slightly or "pulls" to one side
when traveling on smooth, level
road.

• When stopping, listen and check

for unusual sounds, pulling to one
side, increased brake pedal travel
or "hard-to-push" brake pedal.

• If any slipping or changes in the

operation of your reduction gear
occurs, check the reduction gear
fluid level.

• Check the reduction gear P (Park)

function.

• Check the parking brake.
• Check for fluid leaks under your

vehicle (water dripping from the air
conditioning system during or after
use is normal).

At least monthly:

• Check coolant level in the coolant

reservoir.

• Check the operation of all exterior

lights, including the brake lights,
turn signals and hazard warning
flashers.

• Check the inflation pressures of all

tires that are worn, show uneven
wear, or are damaged.

• Check for loose wheel lug nuts.

At least twice a year:
(for example, every Spring and
Fall)

• Check radiator, heater and air con-

ditioning hoses for leaks or dam-
age.

• Check windshield washer spray

and wiper operation. Clean wiper
blades with clean cloth dampened
with washer fluid.

• Check headlight alignment.
• Check the seat belts for wear and

function.

Be careful when checking the
coolant level when the fuel cell
power module is hot. Scalding
hot coolant and steam may
blow out under pressure. This
could cause burns or other seri-
ous injury.

WARNING

7-7

7

Maintenance

At least once a year:

• Clean body and door drain holes.
• Lubricate door hinges and hood

hinges.

• Lubricate door and hood locks and

latches.

• Lubricate door rubber weather

strips.

• Lubricate door checker.
• Check the air conditioning system.
• Inspect and lubricate reduction

gear linkage and controls.

• Check the brake fluid level.

S

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Follow Normal Maintenance Schedule if the vehicle is usually operated where
none of the following conditions apply. If any of the following conditions apply,
you must follow the Maintenance Under Severe Usage Conditions.
• Repeated driving short distance of less than 5 miles (8 km) in normal tem-

perature or less than 10 miles (16 km) in freezing temperature

• Low speed driving for long distances
• Driving on rough, dusty, muddy, unpaved, graveled or salt-spread roads
• Driving in areas using salt or other corrosive materials or in very cold

weather

• Driving in heavy dust condition
• Driving in heavy traffic area
• Driving on uphill, downhill, or mountain road repeatedly
• Towing a trailer or using a camper, or roof rack
• Driving as a patrol car, taxi, other commercial use of vehicle towing
• Driving over 106 mph (170 km/h)
• Frequently driving in stop-and-go condition

If your vehicle is operated under the above conditions, you should inspect,
replace or refill more frequently than the following Normal Maintenance
Schedule. After the periods or distance shown in the chart, continue to follow
the prescribed maintenance intervals.

7-8

Maintenance

Normal Maintenance Schedule

Months

12

24

36

48

60

72

84

96

108

120

132

144

156

168

180

Miles×1,000

6

12

18

24

30

36

42

48

54

60

66

72

78

84

90

Km×1,000

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

Hydrogen sensor

I

I

I

I

I

I

I

Hydrogen system 
(Check the hydrogen leakage)

Inspect every 6,000 miles (10,000 km) or 24 months

Air cleaner filter

Replace every at 12,000 (20,000 km) miles

Device cooling coolant

At first, replace at 120,000 miles (200,000 km) or 10 years :

Thereafter, replace every 30,000 miles (48,000 km) or 24 months

Stack cooling coolant

Replace every at 36,000 miles (60,000 km) or 36 months

Ion filter

Replace every at 36,000 miles (60,000 km) or 36 months

Reduction gear

No check, No service required

Air conditioner refrigerant/
compressor

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Brake lines, hoses and connections

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Brake discs and pads

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Driveshaft and boots

I

I

I

I

I

I

I

Front suspension ball joints

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Maintenance 

Intervals

Maintenance

Item

I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace

7-9

7

Maintenance

Normal Maintenance Schedule (Cont.)

I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace

Months

12

24

36

48

60

72

84

96

108

120

132

144

156

168

180

Miles×1,000

6

12

18

24

30

36

42

48

54

60

66

72

78

84

90

Km×1,000

10

20

30

40

50

60

70

80

90

100

110

120

130

140

150

Parking brake

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Steering gear rack, linkage and
boots

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Tire (pressure & tread wear)

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Battery condition

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Brake fluid

Inspect every 15,000 miles (24,000 km) or 12 months,

Replace every 60,000 miles (96,000 km) or 48 months

Climate control air filter

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

Maintenance 

Intervals

Maintenance

Item

7-10

Maintenance

Maintenance Under Severe Usage Conditions

The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer
to the chart below for the appropriate maintenance intervals.
R : Replace  I : Inspect and, after inspection, clean, adjust, repair or replace if necessary

Maintenance item

Maintenance

operation

Maintenance intervals

Driving condition

Hydrogen system 
(Check the hydrogen leakage)

I

Inspect more frequently 

depending on the condition

C, D, F, G, J, L

Air cleaner filter

I

Inspect more frequently 

depending on the condition

C, D, E

Device cooling coolant

R

Replace more frequently 

depending on the condition

C, D, E, F, J, K, L

Stack cooling coolant

R

Replace more frequently 

depending on the condition

C, D, F, G, L

Ion filter

R

Replace more frequently 

depending on the condition

C, D, F, G, L

Reduction gear fluid

R

72,000 miles (120,000 km)

C, F, G, I, J

Air conditioner refrigerant/compressor

I

Inspect more frequently 

depending on the condition

C, D, F, G, L

Disc brakes and pads, calipers and rotors

I

Inspect more frequently 

depending on the condition

C, D, E, G, H

7-11

7

Maintenance

Severe driving conditions

A - Repeatedly driving short distances of less than 5 miles 

(8 km) in normal temperature or less than 10 miles (16 km)
in freezing temperature

B - Extensive low speed driving for long distances
C- Driving on rough, dusty, muddy, unpaved, graveled or salt-

spread roads

D- Driving in areas using salt or other corrosive materials or in

very cold weather

E - Driving in sandy areas
F - Driving in heavy traffic area over 90°F (32°C)
G- Driving on uphill, downhill, or mountain road
H- Towing a Trailer, or using a camper, or roof rack
I - Driving as a patrol car, taxi, other commercial use or vehicle

towing

J - Driving over 106 mph (170 km/h)
K - Frequently driving in stop-and-go conditions

Maintenance item

Maintenance

operation

Maintenance intervals

Driving condition

Driveshaft and boots

I

Inspect more frequently 

depending on the condition

C, D, E, F, G, H, I, J 

Front suspension ball joints

I

Inspect more frequently 

depending on the condition

C, D, E, F, G

Parking brake

I

Inspect more frequently 

depending on the condition

C, D, G, H

Steering gear rack, linkage and boots

I

Inspect more frequently 

depending on the condition

C, D, E, F, G

Climate control air filter

R

Replace more frequently 

depending on the condition

C, E

7-12

Maintenance

E

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Hydrogen System

Check Hydrogen system compo-
nents in contact with hydrogen, such
as hydrogen tank, hydrogen supply
system parts and hydrogen leak sen-
sors, for hydrogen leakage and dam-
age. Replace any damaged parts.

Cooling System

Check cooling system components,
such as radiator, coolant reservoir,
hoses and connections for leakage
and damage. Replace any damaged
parts.

Coolant 

The coolant should be changed at
the intervals specified in the mainte-
nance schedule.

Reduction Gear Fluid

Inspect the reduction gear fluid
according to the maintenance sched-
ule.

Brake Hoses and Lines

Visually check for proper installation,
chafing, cracks, deterioration and
any leakage. Replace any deteriorat-
ed or damaged parts immediately.

Brake Fluid 

Check brake fluid level in the brake
fluid reservoir. The level should be
between the MIN and the MAX
marks on the side of the reservoir.
Use only hydraulic brake fluid con-
forming to DOT 3 or DOT 4 specifi-
cation.

Brake Discs, Pads, Calipers
and Rotors

Check the pads for excessive wear,
discs for run out and wear, and
calipers for fluid leakage.

Suspension Mounting Bolts 

Check the suspension connections
for looseness or damage. Retighten
to the specified torque.

Steering Gear Box, Linkage &
Boots/Lower Arm Ball Joint

With the vehicle stopped and the
vehicle off, check for excessive free-
play in the steering wheel. Check the
linkage for bends or damage. Check
the dust boots and ball joints for
deterioration, cracks, or damage.
Replace any damaged parts.

Drive Shafts and Boots

Check the drive shafts, boots and
clamps for cracks, deterioration, or
damage. Replace any damaged
parts and, if necessary, repack the
grease.

Air Conditioning Refrigerant 

Check the air conditioning lines and
connections for leakage and dam-
age.

7-13

7

Maintenance

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T

The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is
filled at the factory.
Check the antifreeze protection and
coolant level at least once a year, at
the beginning of the winter season
and before traveling to a colder cli-
mate.

Checking the Coolant Level

Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen
or deteriorated hoses.
The coolant level should be filled
between the MAX and the MIN
marks on the rear side of the coolant
reservoir when the parts in the fuel
cell power module compartment is
cool.
If the coolant level is low, add enough
distilled (deionized) water to bring
the level to the MAX mark, but do not
overfill. If frequent additions are
required, you see an authorized
HYUNDAI dealer for a cooling sys-
tem inspection.

Recommended coolant

• When adding coolant, use only

distilled (deionized) water for your
vehicle and never mix hard water in
the coolant filled at the factory.

• An improper coolant mixture can

result in severe malfunction or
electric devices damage.

• Do not use alcohol or methanol

coolant or mix them with the spec-
ified coolant.

• Do not use a solution that contains

more than 60% antifreeze or less
than 35% antifreeze, which would
reduce the effectiveness of the
solution.

OFE078003

7-14

Maintenance

For mixing percentage, refer to the
following table:

Information

If in doubt about the mix ratio, a 50%
water and 50% antifreeze mix is the
easiest to mix together as it will be the
same quantity of each. It is suitable to
use for most temperature ranges of 
- 31°F and higher.

i

Ambient

Temperature

Mixture Percentage 

(volume)

Antifreeze

Water

5°F (-15°C)

35

65

-13°F (-25°C)

40

60

-31°F (-35°C)

50

50

-49°F (-45°C)

60

40

Never remove the
radiator cap or the
drain plug while the
radiator is hot. Hot
coolant and steam

may blow out under pressure,
causing serious injury.

WARNING 

OFE078004

Turn the vehicle off and wait
until the parts in the fuel cell
power module compartment
cools down. Use extreme care
when removing the radiator
cap. Wrap a thick towel around
it, and turn it counterclockwise
slowly to the first stop. Step
back while the pressure is
released from the cooling sys-
tem. When you are sure all the
pressure has been released,
press down on the cap, using a
thick towel, and continue turn-
ing counterclockwise to remove
it.

7-15

7

Maintenance

The electric motor for the cooling fan
is controlled by coolant temperature,
refrigerant pressure and vehicle
speed. As the coolant temperature
decreases, the electric motor will
automatically shut off. This is a nor-
mal condition.

Changing Coolant 

Have coolant changed by an author-
ized HYUNDAI dealer according to
the Maintenance Schedule at the
beginning of this chapter.

To prevent damage to parts in the
fuel cell power module compart-
ment, put a thick towel around the
coolant cap before refilling the
coolant to prevent the coolant
from overflowing into parts in the
fuel cell power module compart-
ment.

NOTICE

The electric motor for
the cooling fan may
continue to operate
or start up when the
vehicle is not running

and can cause serious injury.
Keep hands, clothing and tools
away from the rotating fan
blades of the cooling fan.

WARNING 

Do not use coolant or antifreeze
in the washer fluid reservoir.
Coolant can severely obscure
visibility when sprayed on the
windshield and may cause loss
of vehicle control resulting in an
accident.
Coolant may also cause dam-
age to paint and body trim.

WARNING 

7-16

Maintenance

S

ST

TA

AC

CK

K  C

CO

OO

OL

LIIN

NG

G  C

CO

OO

OL

LA

AN

NT

T

The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is
filled at the factory.
Check the antifreeze protection and
coolant level at least once a year, at
the beginning of the winter season
and before traveling to a colder cli-
mate.

Checking the Coolant Level

Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen
or deteriorated hoses.
When replacing any part of the cool-
ing system there may be loss of
coolant. In that case, fill with an
exclusive coolant for the fuel cell.
When replacing the ion filter car-
tridge, replace the whole stack
coolant.
The coolant level should be filled
between F (MAX) and L (MIN) marks
on the side of the coolant reservoir
when the fuel cell power module is
cool.

If the stack cooling coolant level is
low, add enough exclusive coolant
for fuel cell stack to provide protec-
tion against freezing and corrosion in
the authorized HYUNDAI dealer.
In addition, whenever replacing the
ion filter cartridge, add enough exclu-
sive coolant for fuel cell stack.

OFE078005

Stack cooling coolant

• When adding stack cooling

coolant, use only exclusive coolant
for fuel cell stack in authorized
HYUNDAI dealer and never mix
any water or liquid.

• An improper coolant mixture can

result in severe malfunction or
electric devices damage.

• If the vehicle is damaged by adding

unspecified liquid except exclusive
coolant for fuel cell stack, it will not
be covered by the warranty.

7-17

7

Maintenance

Never remove the
radiator cap or the
drain plug while the
radiator is hot. Hot
coolant and steam

may blow out under pressure,
causing serious injury.

WARNING 

OFE078006

Turn the vehicle off and wait
until the parts in the fuel cell
power module compartment
cools down. Use extreme care
when removing the cap. Wrap a
thick towel around it, and turn it
counterclockwise slowly to the
first stop. Step back while the
pressure is released from the
cooling system. When you are
sure all the pressure has been
released, press down on the
cap, using a thick towel, and
continue turning counterclock-
wise to remove it.

The electric motor for the cooling fan
is controlled by coolant temperature,
refrigerant pressure and vehicle
speed. As the coolant temperature
decreases, the electric motor will
automatically shut off. This is a nor-
mal condition.

Changing Coolant 

For the fuel cell stack, an exclusive
coolant must be used . When chang-
ing the fuel cell stack coolant, have
that coolant be changed by an
authorized HYUNDAI dealer accord-
ing to the Maintenance Schedule at
the beginning of this chapter.

To prevent damage to parts in the
fuel cell power module compart-
ment, put a thick towel around the
coolant cap before refilling the
coolant to prevent the coolant
from overflowing into parts in the
fuel cell power module compart-
ment.

NOTICE

7-18

Maintenance

The electric motor for
the cooling fan may
continue to operate
or start up when the
vehicle is not running

and can cause serious injury.
Keep hands, clothing and tools
away from the rotating fan
blades of the cooling fan.

WARNING 

Do not use coolant or antifreeze
in the washer fluid reservoir.
Coolant can severely obscure
visibility when sprayed on the
windshield and may cause loss
of vehicle control resulting in an
accident.
Coolant may also cause dam-
age to paint and body trim.

WARNING 

Do not mix-up the caps of
device cooling coolant and
stack cooling coolant because
the fluid material is different. If
the cap is mixed, the fuel cell
system may be damage.
Have you consult an authorized
HYUNDAI dealer.

CAUTION

7-19

7

Maintenance

B

BR

RA

AK

KE

E  F

FL

LU

UIID

D

Checking the Brake Fluid
Level

Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX and MIN marks on the
side of the reservoir.
Before removing the reservoir cap
and adding brake fluid, clean the
area around the reservoir cap thor-
oughly to prevent brake fluid contam-
ination.

If the level is low, add the specified
brake fluid to the MAX level. The level
will fall with accumulated mileage.
This is a normal condition associated
with the wear of the brake linings. If
the fluid level is excessively low, have
the brake system checked by an
authorized HYUNDAI dealer.

• Do not allow brake fluid to con-

tact the vehicle’s body paint, as
it will result in paint damage.

• NEVER use brake fluid which

has been exposed to open air for
an extended time, as its quality
cannot be guaranteed. It should
be disposed of properly.

• Do not use the wrong type of

brake fluid. A few drops of min-
eral based oil such as engine oil,
in your brake system can dam-
age brake system parts.

Information 

Use only the specified brake fluid
(refer to "Recommended Lubricants
and Capacities" in chapter 8).

i

NOTICE

If the brake system requires fre-
quent additions of fluid this
could indicate a leak in the
brake system. Have the vehicle
inspected by an authorized
HYUNDAI dealer.

WARNING 

Do not let brake fluid enter into
your eyes. If brake fluid gets in
your eyes, flush your eyes with
clean water for at least 15 min-
utes and get immediate medical
attention.

WARNING 

OFE078007

7-20

Maintenance

W

WA

AS

SH

HE

ER

R  F

FL

LU

UIID

D

Checking the Washer Fluid
Level

Check the fluid level in the washer
fluid reservoir and add fluid if neces-
sary. Plain water may be used if
washer fluid is not available.
However, use washer solvent with
antifreeze characteristics in cold cli-
mates to prevent freezing.

Filter Replacement

Faulty air cleaner filter has a direct
influence on reduction of the stack
output, etc. Replace the filter accord-
ing to the maintenance schedule.

OFE078008

To prevent serious injury or
death, take the following safety
precautions when using washer
fluid:

Do not use coolant or
antifreeze in the washer fluid
reservoir.
Coolant can severely obscure
visibility when sprayed on the
windshield and may cause
loss of vehicle control result-
ing in an accident or damage
to paint and body trim.

Do not allow sparks or flame
to contact the washer fluid or
the washer fluid reservoir.
Washer fluid may contain
alcohol and can be flamma-
ble.

Do not drink washer fluid and
avoid contact with skin.
Washer fluid is harmful to
humans and animals.

Keep washer fluid away from
children and animals.

WARNING 

A

AIIR

R  C

CL

LE

EA

AN

NE

ER

R

1. Loosen the air cleaner cover

attaching clips and open the
cover.

2. Wipe the inside of the air cleaner.
3. Replace the air cleaner filter.
4. Lock the cover with the cover

attaching clips.

5. Check that the cover is firmly

installed.

Information 

If the vehicle is operated in extremely
dusty or sandy areas, replace the air
cleaner filter more often than the
usual recommended intervals (refer to
"Maintenance Under Severe Usage
Conditions" in this chapter).

i

7-21

7

Maintenance

OFE078010

OFE078009

Do not drive with the air clean-
er filter removed. This will
result in excessive wear.

When removing the air clean-
er filter, be careful that dust or
dirt does not enter the air
intake, or damage may result.

Use HYUNDAI genuine parts,
use of non-genuine parts
could damage the air flow
sensor.

CAUTION

7-22

Maintenance

C

CL

LIIM

MA

AT

TE

E  C

CO

ON

NT

TR

RO

OL

L  A

AIIR

R  F

FIIL

LT

TE

ER

R

Filter Inspection

The climate control air filter should
be replaced according to the
Maintenance Schedule. If the vehicle
is operated in severely air-polluted
cities or on dusty rough roads for a
long period, it should be inspected
more frequently and replaced earlier.
When you replace the climate control
air filter, replace it performing the fol-
lowing procedure, and be careful to
avoid damaging other components.

1. With the glove box open, remove

the stoppers on both sides to allow
the glove box to hang freely on the
hinges.

2. Remove the support rod (1).

OFE078011

OFE078012

7-23

7

Maintenance

3. Press and hold the lock (1) on left

side of the cover.

4. Pull out (2) the cover.

5. Replace the climate control air fil-

ter.

6. Reassemble in the reverse order

of disassembly.

Install a new climate control air fil-
ter in the correct direction with the
arrow symbol (

↓↓

) facing down-

wards. Otherwise, the climate con-
trol effects may decrease, possi-
bly with a noise.

NOTICE

OHG075041

OFE078013

7-24

Maintenance

W

WIIP

PE

ER

R  B

BL

LA

AD

DE

ES

S

Blade Inspection

Contamination of either the wind-
shield or the wiper blades with for-
eign matter can reduce the effective-
ness of the windshield wiper func-
tionality. Common sources of con-
tamination are insects, tree sap, and
hot wax treatments used by some
commercial car washes. If the blades
are not wiping properly, clean both
the window and the blades with a
clean cloth dampened with washer
fluid.

To prevent damage to the wiper
blades, arms or other compo-
nents, do not:
• Use gasoline, kerosene, paint

thinner, or other solvents on or
near them.

• Attempt to move the wipers

manually.

• Use non-specified wiper blades.

Information 

Commercial hot waxes applied by
automatic car washes have been
known to make the windshield diffi-
cult to clean.

Blade Replacement

When the wipers no longer clean
adequately, the blades may be worn
or cracked, and require replacement.

To prevent damage to the wiper
arms or other components, do not
attempt to move the wipers manu-
ally.

The use of a non-specified wiper
blade could result in wiper mal-
function and failure.

Front windshield wiper service
positions

This vehicle has a "hidden" wiper
design which means that the wipers
cannot be lifted when they are in
their bottom resting position.
1. Within 20 seconds of turning off

the vehicle, lift and hold the wiper
lever up to the MIST position for
about 2 seconds until the wipers
move to the top wipe position.

2. At this time you can lift the wipers

off the windshield.

3. Gently put the wipers back down

onto the windshield.

4. Turn the wipers to any ON position

to return the wipers to the bottom
resting position.

NOTICE

NOTICE

i

NOTICE

OFE078038N

7-25

7

Maintenance

Front windshield wiper blade
replacement

1. Raise the wiper arm.

2. Lift up the wiper blade clip. Then

pull down the blade assembly and
remove it.

3. Install the new blade assembly in

the reverse order of removal.

4. Return the wiper arm on the wind-

shield.

To prevent damage to the wiper
arms or other components,
have an authorized HYUNDAI
dealer replace the wiper blade.

CAUTION

OLF074017

OLF074018

OLF074019

7-26

Maintenance

Rear window wiper blade
replacement

1. Operate the rear windshield wiper

to make sure the blade is on lower
position. Then turn off the vehicle.

2. Raise the wiper arm (1) and pull

out the wiper blade assembly.

3. Install the new blade assembly by

inserting the center part into the
slot in the wiper arm until it clicks
into place.

4. Make sure the blade assembly is

installed firmly by trying to pull it
slightly.

To prevent damage to the wiper arms
or other components, we recom-
mend that the wiper blades be
replaced by an authorized HYUNDAI
dealer.

OFE078016

OFE078014

OFE078015

7-27

7

Maintenance

1

12

2V

V  B

BA

AT

TT

TE

ER

RY

Y

The vehicle is not equipped with a
common 12V battery which requires
periodic replacement. The battery is
a lithium polymer type integrated into
the high voltage battery. Full dis-
charge of the battery is prevented
through 12V battery protection sys-
tem which can isolate the 12V bat-
tery.

Always follow these instructions
when handling your vehicle's bat-
tery to prevent damage to your
battery:
• If you connect unauthorized

electronic devices to the battery,
the battery may be discharged.
Never use unauthorized
devices.

NOTICE

To prevent SERIOUS INJURY or
DEATH to you or bystanders,
always follow these precautions
when working near or handling
the battery:

Always read and follow
instructions carefully
when handling a battery.
Wear eye protection
designed to protect the
eyes from acid splashes.
Keep all flames, sparks,
or smoking materials
away from the battery.

NEVER attempt to recharge
the battery when the vehicle’s
battery cables are connected
to the battery.

The electrical ignition system
works with high voltage.
NEVER touch these compo-
nents with the vehicle ON
(

indicator ON) or when

the POWER button is in the
ON position.

WARNING 

 

 

 

 

 

 

 

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