heater HYUNDAI NEXO 2019 User Guide

7-6
Maintenance
Owner maintenance schedule
When you stop for fuel:
• Check for both fuel cell stack andDevice 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 coolantreservoir.
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: (i.e., 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 headlamp 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

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7
Maintenance
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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

7-16
Maintenance
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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

7-50
Maintenance
Fuse NameFuse RatingProtected Component
MEMORY110APower Tail Gate Module, A/C Control Module, A/C Control Panel
MODULE110AICM Relay Box (Outside Mirror Folding/Unfolding Relay), A/V & Navigation Head Unit (Hazard Lamp Switch),
Shift Selection Switch (SBW), Auto Light & Photo Sensor, Driver/Passenger Power Outside Mirror,
Instrument Cluster
TAIL GATEOPEN10ATail Gate Relay
P/WINDOW RH25APower Window RH Relay
P/WINDOW LH25APower Window LH Relay, Driver Safety Window Module
P/SEAT DRV25ADriver Seat Manual Switch
MODULE47.5AIBU, Remote Control Smart Parking Assist Unit, VESS Unit, Electronic Parking Brake Switch,
Lane Keeping Assist Unit(Line), Blind-Spot Collision Warning Unit LH/RH, Crash Pad Switch,
PE Room Junction Block (Multipurpose Check Connector)
MODULE87.5AData Link Connector, Crash Pad Switch, Electro Chromic Mirror
S/HEATER RR20ARear Seat Heater
HEATED
MIRROR10ADriver/Passenger Power Outside Mirror, A/C Control Panel
S/HEATER FRT20AFront Air Ventilation/Seat Heater Seat Control Module
Instrument panel fuse panel

7-51
7
Maintenance
Fuse NameFuse RatingProtected Component
AMP25AAMP
MULTI MEDIA15AA/V & Navigation Head Unit, Center Fascia Switch Panel
MODULE510AFront Air Ventilation/Seat Heater Seat Control Module, AMP, A/V & Navigation Head Unit,
A/C Control Panel, PTC Heater, A/C Control Module, Electro Chromic Mirror, Rear Seat Heater
WIPER (RR)15AICM Relay Box (Rear Wiper Relay), Rear Wiper Motor
DOOR LOCK20ADoor Lock Relay, Door Unlock Relay, ICM Relay Box (Two Turn Door Unlock Relay)
IBU115AIBU
BRAKE
SWITCH10AIBU, Stop Lamp Switch
P/SEAT PASS25APassenger Seat Manual Switch
A/C7.5AA/C Control Module, Incar Temperature Sensor, A/C Control Panel,
Cluster Ionizer, A/C Compressor, PE Room Junction Block (Blower Relay)
AIR BAG210ASRS Control Module
WASHER15AMultifunction Switch
Instrument panel fuse panel

7-52
Maintenance
Fuse NameFuse RatingProtected Component
MDPS7.5AMDPS Unit
MODULE77.5AFront Air Ventilation/Seat Heater Seat Control Module, AC Inverter,
Rear Seat Heater, Surround View Monitor Unit, Rear Power Outlet
SUNROOF220ASunroof Unit
SUNROOF120ASunroof Unit
CLUSTER7.5AInstrument Cluster
MODULE37.5ASCU, Shift Selection Switch (SBW), IDC, VPD Sensor, Stop Lamp Switch, HMU, BMS Control Module
START7.5AFCU, IBU
IBU27.5AIBU
A/BAG IND7.5AInstrument Cluster, A/C Control Panel
MODULE67.5AIBU
MODULE210ABMS Control Module, Wireless Charger, USB Charger LH/RH, A/V & Navigation Head Unit,
Center Fascia Switch Panel, AMP, Surround View Monitor Unit, Power Outside Mirror Switch, IBU
AIR BAG115ASRS Control Module, Passenger Occupant Detection Sensor
Instrument panel fuse panel

7-54
Maintenance
Motor compartment fuse panel
TypeFuse NameFuse RatingCircuit Protected
MULTI FUSE-1
B+260AICU Junction Block (IPS Control Module, IPS1)
B+360AICU Junction Block (IPS Control Module)
COOLING PE PUMP40APE Room Coolant Pump (CPP)
EPB240AElectronic Brake Control Module
IG240APE Room Junction Block (IG2 Relay)
EPB140AElectronic Brake Control Module, PE Room Junction Block (Multipurpose Check Connector)
B+460AICU Junction Block (Fuse - SUNROOF1, SUNROOF2, AMP, P/SEAT DRV,
P/SEAT PASS, S/HEATER FRT, P/WINDOW LH, P/WINDOW RH, TAIL GATE OPEN)
IMEB80AElectronic Brake Control Module
MULTI FUSE-2
BLOWER50APE Room Junction Block (Blower Relay)
MDPS80AMDPS Unit

7-55
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