2023 GENESIS G90 brake

9-14
Maintenance
Engine Coolant/Liquid-Cooled
Intercooler Coolant
The coolant should be changed at the
intervals specified in the maintenance
schedule.
Automatic Transmission Fluid
Automatic transmission fluid should
not be checked under normal usage
conditions, the Automatic transmission
fluid should be changed by an authorized
retailer of Genesis Branded products
according to the maintenance schedule.
Information
Automatic transmission fluid color is red
when new.
As the vehicle is driven, the automatic
transmission fluid will begin to look
darker.
This is a normal condition. It does not
need to be replaced based on the color
change.
NOTICE
The use of a non-specified fluid could
result in transmission malfunction and
failure.
Use only specified automatic
transmission fluid. (Refer to
“Recommended Lubricants and
Capacities” section in chapter 2.)
Brake Hoses and Lines
Visually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately.
Brake Fluid
Check the 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 conforming to DOT
4 specification.
Brake Discs, Pads, Calipers and
Rotors
Check the pads, the disc, and the rotor
for any excessive wear-out. Inspect
calipers for any fluid leakage
Exhaust Pipe and Muffler
Visually inspect the exhaust pipes,
muffler and hangers for cracks,
deterioration, or damage. Start
the engine and listen carefully for
any exhaust gas leakage. Tighten
connections or replace parts as
necessary.
Propeller Shaft
Check the propeller shaft, boots, clamps,
rubber couplings and center-bearing
rubber for cracks, deterioration, or
damage. Replace any damaged parts
and if necessary, repack the grease.

9-15
09
ENGINE OIL
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 engine
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 damage.
Checking the Engine Oil Level
Engine oil is used for lubricating,
cooling, and operating various hydraulic
components in the engine. Engine oil
consumption while driving is normal,
and it is necessary to check and refill the
engine oil regularly. Also, check and refill
the oil level within the recommended
maintenance schedule to prevent
deterioration of oil performance.
Check the engine oil following the below
procedure.
1. Follow all of the oil manufacturer’s
precautions.
2. Be sure the vehicle is on the level
ground in P (Park) with the parking
brake set and the wheels blocked.
3. Turn the engine on and warm
the engine up until the coolant
temperature reaches a constant
normal temperature.
4. Turn the engine off, remove the oil
filler cap and pull the dipstick out.
Wait for 15 minutes for the oil to return
to the oil pan.
5. Wipe the dipstick clean and re-insert
it fully.

9-21
09
Checking the Brake Fluid Level
ORS091006
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 thoroughly to prevent
brake fluid contamination.
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 retailer of
Genesis Branded products.
WARNING
If the brake system requires frequent
additions of fluid this could indicate
a leak in the brake system. Have the
vehicle inspected by an authorized
retailer of Genesis Branded products.
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 minutes and get immediate
medical attention.
NOTICE

[Do not allow brake fluid to contact
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 mineral based
oil such as engine oil in your brake
system can damage brake system
parts.
Information
Use only the specified brake fluid (refer
to “Recommended Lubricants and
Capacities” section in chapter 2).
BRAKE FLUID

9-33
09
WARNING
Tire failure may cause loss of
vehicle control resulting in an
accident. To reduce risk of SERIOUS
INJURY or DEATH, take the
following precautions:

[Inspect your tires monthly for
proper inflation as well as wear
and damage.

[The recommended cold tire
pressure for your vehicle can be
found in this manual and on the
tire label located on the driver’s
side center pillar. Always use a
tire pressure gauge to measure
tire pressure. Tires with too
much or too little pressure wear
unevenly causing poor handling.

[Check the pressure of the
spare every time you check the
pressure of the other tires on
your vehicle.

[Replace tires that are worn, show
uneven wear, or are damaged.
Worn tires can cause loss of
braking effectiveness, steering
control, or traction.

[ALWAYS replace tires with the
same size, type, construction and
tread pattern as each tire that
was originally supplied with this
vehicle. Using tires and wheels
other than the recommended
sizes could cause unusual
handling characteristics, poor
vehicle control, or negatively
affect your vehicle’s Anti-Lock
Brake System (ABS) resulting in a
serious accident.
Tire Care
For proper maintenance, safety, and
maximum fuel economy, you must
always maintain recommended
tire inflation pressures and stay
within the load limits and weight
distribution recommended for your
vehicle.
ORS012024N
All specifications (sizes and
pressures) can be found on a label
attached to the driver’s side center
pillar.
Recommended Cold Tire
Inflation Pressures
All tire pressures (including the
spare) should be checked when the
tires are cold. “Cold tires” means the
vehicle has not been driven for at
least three hours or driven less than
one mile (1.6 km).
Warm tires normally exceed
recommended cold tire pressures
by 4 to 6 psi (28 to 41 kPa). Do not
release air from warm tires to adjust
the pressure or the tires will be
under-inflated. For recommended
inflation pressure, refer to “Tire and
Wheels” section in chapter 2.
TIRES AND WHEELS

9-35
09
Tire Rotation
To equalize tread wear, Genesis
Branded Vehicle recommends that
the tires be rotated according to the
maintenance schedule or sooner if
irregular wear develops.
During rotation, check the tires for
correct balance.
When rotating tires, check for uneven
wear and damage. Abnormal wear
is usually caused by incorrect tire
pressure, improper wheel alignment,
out-of-balance wheels, severe braking
or severe cornering. Look for bumps or
bulges in the tread or side of the tire.
Replace the tire if you find any of these
conditions. Replace the tire if fabric or
cord is visible. After rotation, be sure to
bring the front and rear tire pressures
to specification and check wheel bolt
tightness (proper torque is 101~116
lbf·ft [14-16 kgf·m].
ORS091056L
Disc brake pads should be inspected
for wear whenever tires are rotated.
Information
The outside and inside of the
unsymmetrical tire is distinguishable.
When installing an unsymmetrical
tire, be sure to install the side marked
“outside” face the outside. If the side
marked “inside” is installed on the
outside, it will have a negative effect
on vehicle performance.
WARNING

[Do not use the compact spare
tire for tire rotation.

[Do not mix bias ply and radial ply
tires under any circumstances.
This may cause unusual handling
characteristics that may cause
loss of vehicle control resulting in
an accident.

9-36
Maintenance
Wheel Alignment and Tire
Balance
The wheels on your vehicle were
aligned and balanced carefully at the
factory to give you the longest tire
life and best overall performance.
In most cases, you will not need to
have your wheels aligned again.
However, if you notice unusual tire
wear or your vehicle pulling one way
or the other, the alignment may need
to be reset.
If you notice your vehicle vibrating
when driving on a smooth road, your
wheels may need to be rebalanced.
NOTICE
Incorrect wheel weights can
damage your vehicle’s aluminum
wheels. Use only approved wheel
weights.
Tire Replacement
ORS091057
A : Tread wear indicator
If the tire is worn evenly, a tread wear
indicator will appear as a solid band
across the tread. This shows there is
less than 1/16 inch (1.6 mm) of tread
left on the tire. Replace the tire when
this happens.
Do not wait for the band to appear
across the entire tread before
replacing the tire.
WARNING
To reduce the risk of DEATH or
SERIOUS INJURY:

[Replace tires that are worn, show
uneven wear, or are damaged.
Worn tires can cause loss of
braking effectiveness, steering
control, and traction.

[Always replace tires with the
same size as each tire that was
originally supplied with this
vehicle. Using tires and wheels
other than the recommended
sizes could cause unusual
handling characteristics, poor
vehicle control, or negatively
affect your vehicle’s Anti-Lock
Brake System (ABS) resulting in a
serious accident.

[When replacing tires (or wheels),
it is recommended to replace
the two front or two rear tires (or
wheels) as a pair. Replacing just
one tire can seriously affect your
vehicle’s handling.

[Tires degrade over time, even
when they are not being used.
Regardless of the remaining
tread, Genesis Branded Vehicle
recommends that tires be
replaced after six (6) years of
normal service.

[Heat caused by hot climates or
frequent high loading conditions
can accelerate the aging process.
Failure to follow this warning
may cause sudden tire failure,
which could lead to a loss of
vehicle control resulting in an
accident.

9-50
Maintenance
Instrument panel fuse panel
Fuse NameFuse
RatingCircuit Protected
P/SEAT (PASS)225A Passenger Power Seat Module
S/HEATER
(PASS)25A Passenger Power Seat Module
A/BAG IND10A Overhead Console
UWB10ABLE Unit, Interior UBW Unit #1/#2/#3, Interior UBW Unit,
Rear UBW Unit LH/RH, Front UBW Unit LH/RH
P/SEAT (PASS)130A Passenger Power Seat Module
P/SEAT (DRV)130A Driver Power Seat Module
SUNROOF220A Sunroof Rear Rollo Controller
MODULE1310AElectro Chromic Mirror, Data Link Connector, Front A/C
Controller, A/C Control Module, AMP CCIC Keyboard,
Smart Phone Wireless Charger, Support AMP, LDC (IG1
Input), CCIC Head Unit, REAR Junction Block (LDC - IG1
Input), Driver/Passenger Power Seat Module, Rear Seat
CCS Module LH/RH, Rear Seat Heater Control Module LH/
RH, Rear Power Seat Module LH/RH, Rear Seat Console
Wireless Charger, Rear Seat Console UVC Lamp, Armrest
Touch Screen, AMP
MASSAGE SEAT
(FRT)15ADriver/Passenger Lumbar Support Unit, Passenger Foot
Massage Unit
S/HEATER
(DRV)25A Driver Power Seat Module
CURTAIN15A IBU
ADAS DRV110A ADAS Unit (Driving)
MODULE1410ADriver/Passenger Door Outside Handle, Rear Door Outside
Handle LH/RH
P/SEAT (DRV)225A Driver Power Seat Module
PRESAFETY
SEAT BELT110A Pre-Active Seat Belt Unit
SBCM (RR LH)20A Rear SBCM LH
P/WINDOW
(LH)30ADriver Safety Power Window Module, Rear Safety Power
Window Module LH
MODULE810AADAS Unit (Parking), Center Control Panel, CCIC Head Unit,
Rear Seat Console Tray Lamp, Rear Seat Console Remote
Control Switch, Instrument Cluster, Rear Seat Console UVC
Lamp
BRAKE SWITCH10A IBU, Stop Lamp Switch
SUNROOF120A Sunroof Glass Controller

9-59
09
Rear junction block
Fuse NameFuse
RatingCircuit Protected
B+2 50AICU Junction Block (IPS4, IPS5, Fuse - E-SHIFTER1, BRAKE
SWITCH, IBU1, UWB, MODULE9, CCU1, AIR BAG1)
B+3 50A ICU Junction Block (IPS1/IPS6/IPS7/IPS8)
B+1 50AICU Junction Block (LDC, Long Term Load Latch Relay,
Short Term Load Latch Relay)
ECS1 15A ECS Unit, Air ECS Unit
PRESAFETY SEAT
BELT230A Pre-Active Seat Belt Unit
PRESAFETY SEAT
BELT330A Pre-Active Seat Belt Unit
ECS2 25A Air ECS Unit
BATTERY
MANAGEMENT15A BMS Control Module
BLOWER (RR) 20A Rear Blower Relay
P/SEAT (RR LH)1 30A Rear Power Seat Module LH
MASSAGE SEAT
(RR)15A Rear Seat Lumbar Support Unit LH/RH
SBCM (RR RH) 20A Rear SBCM RH
S/HEATER
(RR LH)25ARear Power Seat Module LH, Rear Seat CCS Module LH,
Rear Seat Heater Control Module LH
MODULE18 10ADriver/Passenger Power Seat Switch, Driver/Passenger
Power Seat Module, Driver/Passenger Lumbar Support
Unit, Passenger Foot Massage Unit, Rear Seat Console
Switch LH/RH, Rear Power Seat Module LH/RH, Rear Seat
Lumbar Support Unit LH/RH, PTL Unit
AMP4 10A AMP, Support AMP
SBCM (PASS) 20A Passenger SBCM
P/SEAT (RR LH)2 25A Rear Power Seat Module LH
S/HEATER
(RR RH)25ARear Power Seat Module RH, Rear Seat CCS Module RH,
Rear Seat Heater Control Module RH
BATTERY C/FAN 15A BMS Cooling Fan
AMP1 25A AMP
AMP2 25A AMP
AMP3 25A Support AMP
P/WINDOW (RH) 30APassenger Safety Power Window Module, Rear Safety
Power Window Module LH
P/SEAT (RR RH)1 30A Rear Power Seat Module RH
POWER TRUNK 30A PTL Unit
RR DR CURTAIN 20A Rear Door Curtain
P/SEAT (RR RH)2 25A Rear Power Seat Module RH