ECU GENESIS G90 2023 Owner's Guide

9-19
09
Information
The coolant level is influenced by the
engine temperature. Before checking or
refilling the coolant, turn the engine off.
WARNING
The electric motor for the
cooling fan may continue to
operate or start up when the
engine is not running and can
cause serious injury. Keep
hands, clothing and tools away
from the rotating fan blades of
the cooling fan.
Always turn off the vehicle unless the
vehicle has to be inspected with the
engine on. Be cautious as the cooling
fan may operate if the negative (-)
battery terminal is not disconnected.
WARNING
Make sure the coolant cap is properly
closed after refilling coolant. Otherwise
the engine could be overheated while
driving.
„Engine compartment front view
ORG3EV091045
1. Check if the coolant cap label is
straight in front.
ORG3EV091043
2. Make sure that the tiny protrusions
inside the coolant cap are securely
interlocked.

9-29
09
NOTICE
Always follow these instructions when
handling your vehicle's battery to
prevent damage to your battery:

[When you do not use the vehicle for a
long time in a low temperature area,
disconnect the battery and keep it
indoors.

[Always charge the battery fully to
prevent battery case damage in low
temperature areas.

[Prevent liquid from wetting the
battery terminals. The performance
of the battery may be degraded, and
may cause injury. Be cautious when
loading liquid in the trunk.

[Do not tilt the battery.

[If you connect unauthorized
electronic devices to the battery, the
battery may be discharged. Never
use unauthorized devices.
Battery Usage
Recommendations
ORS091032

[Keep the battery securely mounted.

[Keep the battery top clean and dry.

[Keep the terminals and connections
clean, tight, and coated with
petroleum jelly or terminal grease.

[Rinse any spilled electrolyte from the
battery immediately with a solution of
water and baking soda.

[If the vehicle is not going to be used
for an extended time, disconnect the
battery cables.
Information
For vehicles with power trunks, note
that the power trunk needs to be reset
after the battery has been replaced.
For more details, refer to "Power
Trunk" section in chapter 5.
NOTICE
Make sure the battery is installed
securely when the it is replaced. If the
battery vibrates while driving, the case
and electrode plate can be damaged.

9-48
Maintenance
Engine Compartment Panel Fuse
Replacement
Blade fuse/Cartridge fuse
ORS091019
ORS091020
A : Blade type fuse,
B : Cartridge type fuse
1. Turn the vehicle off.
2. Turn all other switches off.
3. Remove the fuse panel cover by
pressing 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 engine
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 retailer of Genesis Branded
products.
NOTICE
After checking the fuse panel in the
engine compartment, securely install
the fuse panel cover. You may hear a
clicking sound if the cover is securely
latched. If it is not securely latched,
electrical failure may occur from water
contact.
Multi fuse/Midi fuse
ORS091021
ORS091022
A : Multi type fuse,
B : Midi type fuse
If the multi fuse or midi fuse is blown,
consult an authorized retailer of Genesis
Branded products.

9-51
09
Fuse NameFuse
RatingCircuit Protected
SBCM (DRV)20A Driver SBCM
CCU110A CCU
POWER
HANDLE15A Steering Tilt & Telescopic Unit
MODULE210AFront A/C Controller, Multifunction Switch, Head Lamp LH/
RH
MODULE910AMultifunction Switch, Data Link Connector, CCIC Keyboard,
Rain Sensor, Driver Power Window Switch, Driver Power
Outside Mirror Switch
CCU210A Stop Lamp Switch, CCU
A/C310AA/C Control Module, Front A/C Controller, Incar
Temperature Sensor, E/R Sub Junction Block (PTC Heater
#1/#2 Relay) Rear Junction Block (Rear Blower Relay)
MODULE310A IBU, IAU
IBU110A IBU, IAU
IBU210A IBU, BMS Control Module
E-SHIFTER210A Electronic ATM Shift Lever Dial
E-SHIFTER110A Electronic ATM Shift Lever Dial
MODULE1210ARear Corner Radar LH/RH, ECS Unit, Air ECS Unit, AWD
ECU, RWS Module, ADAS Unit (Parking), IBU, Crash Pad
Switch, Steering Tilt & Telescopic Unit, Front View Camera
(ADAS)
MODULE1110A Driver Power Window Switch, Multifunction Switch, IAU
AIR BAG215A SRS Control Module, Passenger Occupant Detection Sensor
AIR BAG115A SRS Control Module
MODULE1610AFront Console Mood Lamp #1/2, Garnish Lamp LH/RH,
Mood Lamp Unit, Roof Mood Lamp #1/2, Driver/Passenger
Door Garnish Mood Lamp, Rear Door Garnish Mood Lamp
LH/RH, ADAS Unit (Parking)
CLUSTER10A Instrument Cluster, Head-Up Display
MODULE1510A ADAS Unit (Driving)
Wireless DCU10A Domain Control Unit
MODULE510ARear Door Curtain, Rear Occupant Alert (ROA) Sensor,
Clock Spring, Front Console Switch, Active Air Flap Module,
Steering Tilt & Telescopic Unit

9-52
Maintenance
Fuse NameFuse
RatingCircuit Protected
USB CHARGER15A Rear USB Charger Connector
MODULE1010AIAU, CCU, IBU, Electronic ATM Shift Lever Dial, LDC (ACC
Input), Armrest Console Lamp, Domain Control Unit, Rear
Junction Block (LDC - ACC Input), E/R Sub Junction Block
(Power Outlet Relay)
MODULE410ASecurity Indicator, A/C Control Module, Head-Up Display,
Front A/C Controller
MULTIMEDIA215ACenter Control Panel, Rear Seat Console Multimedia Jack,
Rear Seat Console Remote Control Switch
MODULE710ASmart Phone Wireless Charger, Rear Seat Console Wireless
Charger, Front Corner Radar LH/RH, Rear Corner Radar LH/
RH
MULTIMEDIA125A CCIC Head Unit
MODULE610AArmrest Touch Screen, Instrument Cluster, Front A/C
Controller, Head-Up Display

9-54
Maintenance
Engine compartment fuse panel
Type Fuse NameFuse
RatingCircuit Protected
MAINALT225A Alternator
MDPS1125A MDPS Unit
e-S/C125A[Mild HEV] Electric Super Charging Unit
(Power)
MULTICOOLING FAN100A Colling Fan Motor
IEB160A IEB Unit
IEB260A IEB Unit
AIR SUSPENSION
(ECS)50A Air Suspension (ECS) Relay
REAR HEATED150A Rear Heated #1 Relay
REAR HEATED240A Rear Heated #2 Relay
WIPER30A Wiper Motor
SBEOP30A Electronic Oil Pump
HEAD LAMP RH40A Head Lamp RH
HEAD LAMP LH40A Head Lamp LH
START30A Start Relay
MICROHORN15A PCB Block (Horn Relay)
A/C115A A/C Relay
ECU115A ECM
TCU120A TCM
FUEL PUMP20A Fuel Pump Relay
4WD20A AWD ECU

9-55
09
Engine compartment fuse panel
Fuse NameFuse
RatingCircuit Protected
IG130A IG1 Relay
ECU330A Engine Control Relay
IG230A IG2 Relay
ACC30A ACC Relay
ECU210A ECM
EWP20A Electronic Water Pump
MODULE110A Front Radar, Front Corner Radar LH/RH
MDPS210A MDPS Unit
IEB310A IEB Unit
TCU215A TCM, P/N Relay, Electronic Oil Pump
SENSOR310A Oxygen Sensor #1 (B1/S1), Oxygen Sensor #2 (B2/S1)
SENSOR210AOxygen Sensor #3 (B1/S2), Oxygen Sensor #4 (B2/S2),
Purge Control Solenoid Valve, Oil Pump Solenoid Valve,
Canister Close Valve, Oil Control Valve (Intake #1/#2), Oil
Control Valve (Exhaust #1/#2), RCV Control Solenoid Valve
#1/#2, E/R Junction Block (A/C Relay)
SENSOR110AE/R Junction Block (Fuel Pump Relay), Injector
#1/#2/#3/#4/#5/#6 (MPI)
IGN COIL15A Ignition Coil #1/#2/#3/#4/#5/#6
SENSOR415A Cooling Fan Motor, Electric Super Charging Unit (Signal)
ECU420A ECM
WASHER15A WASHER RELAY
MHSG10A[With Mild HEV] Mild Hybrid Starter & Generator Motor
(Signal)

9-61
09
Battery junction block
Fuse Name Fuse Rating Circuit Protected
LDC225A[Mild HEV] Battery System Assembly (Low DC-DC
Converter)
AMS10A 12V Battery Sensor
B+6100ARear Junction Block (Fuse - P/WINDOW (RH), BATTERY C/
FAN, P/SEAT (RR RH)1, P/SEAT (RR RH)2, S/HEATER (RR
RH), POWER TRUNK, RR DR CURTAIN, B+1)
B+560AICU Junction Block (Fuse - P/SEAT (PASS)1, P/SEAT
(PASS)2, MASSAGE SEAT (FRT), ADAS DRV1, S/HEATER
(PASS), CURTAIN, SUNROOF2, MODULE14)
B+460AICU Junction Block (Fuse - SBCM (DRV), SBCM (RR LH),
SUNROOF1, P/SEAT (DRV)1, P/SEAT (DRV)2, POWER
HANDLE, S/HEATER (DRV), P/WINDOW (LH))
B+8100ARear Junction Block (LDC, Fuse - PRESAFETY SEAT
BELT2, ECS1, ECS2, PRESAFETY SEAT BELT3, BATTERY
MANAGEMENT)
B+7100ARear Junction Block (Fuse -SBCM (PASS), SBCM (RR RH),
P/SEAT (RR LH)1, P/SEAT (RR LH)2, S/HEATER (RR LH),
MASSAGE SEAT (RR), BLOWER (RR), MODULE18, B+2, B+3)
RWS100A RWS Module
B+9125AE/R Junction Block (Fuse - HEAD LAMP LH, START, TCU1,
4WD, HEAD LAMP RH, ECU1, FUEL PUMP, ECU3)