brake GENESIS G90 2023 Repair Manual

6-45
06
ORS061019
The Multi-chamber air suspension uses
the air spring containing compressed
air to adjust and maintain the vertical
height of the vehicle both manually or
automatically, according to number of
passengers and load capacity. It also
controls the valve inside the air spring
to adjust stiffness of the air spring and
damper to maximize driving comforts.
Each driving mode provides different
ride comforts.
Vehicle Height Adjustment

[Press the vehicle height adjustment
button to adjust the height. Pressing
the button will raise the vehicle body
and the indicator light illuminates.
Pressing the button again will return
the vehicle height to its original
position and the indicator light turns
off.
[If the vehicle is driving in high speed,
the vehicle height adjustment is set
to automatic mode and the vehicle
height will return to its original
position although you press the
button.
-While above a certain speed, the
height will be automatically set
depending on the driving speed.
-Vehicle height may differ depending
on the drive mode.

[Depending on vehicle condition,
height adjustment will not operate or
stop operating, and the indicator light
blinks.
-When the Multi-chamber air
suspension is malfunctioning
-When the vehicle is lifted up.
-When the vehicle is not stable due
to a sudden brake or acceleration.
-When the air compressor is
overheated.
-When the vehicle is not parked on a
level ground.

[Vehicle height may automatically be
adjusted after 2/4/8/16 hours from
turning off the engine. It is due to the
changes in air temperature.
CAUTION
If the compressor air filter under the
vehicle body is submerged in water,
do not operate the air suspension.
Moisture inflow may damage the
system.
08/7,

6-49
06
Idle Stop and Go helps reduce fuel
consumption by automatically shutting
down the engine, when the vehicle is
at a standstill (for example, red stop
light, stop sign, and traffic jam) subject
to certain prerequisite conditions being
satisfied as listed below.
The engine is automatically started upon
satisfying the starting conditions.
ISG system is always active, when the
engine is running.
Information
When the engine is automatically started
by ISG system, warning lights (for
example, ABS, ESC, ESC OFF, MDPS,
and parking brake warning light) may
illuminate for a few seconds due to low
battery voltage.
However, it does not indicate a
malfunction with ISG system.
ISG System Operation
Prerequisite for activation
ISG system operates in the following
situations.

[The driver's seatbelt is fastened

[The driver's door and hood are closed

[The battery sensor is activated and
the battery is sufficiently charged

[Outside temperature is not too low or
too high

[The vehicle is driven over a constant
speed and stops

[The climate control system satisfies
the conditions

[The vehicle is sufficiently warmed up

[ISG related parts are working properly

[The incline is gradual

[The steering wheel is turned less than
180 degrees and then the vehicle
stops
Information
ORS062070C
ISG system is not activated, when the
prerequisites to activate the ISG system
are unsatisfied.
Auto stop
When ISG is on the engine will be
stopped automatically when both of the
following occurs:
1. Vehicle speed decreases to 0mph (0
km/h) full stop condition.
2. Brake pedal is depressed and gear is
in D (Drive) or N (Neutral).
The Auto Stop (
) indicator illuminates
in green on the instrument cluster, when
the engine stops.
The gasoline 3.5 turbo 48 V electric
supercharger vehicle may automatically
shut down the engine when the vehicle
speed is below 16 mph (25 km/h) with
the brake pedal depressed. At this time,
the ISG indicator lights up in green on
the instrument cluster.
Information
Idle stop cannot reoccur again until the
vehicle speed goes above 3 mph (5 km/h)
and then returns again to the automatic
stop conditions as previously mentioned.
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6-50
Driving Your Vehicle
In the Auto Stop mode, if the engine
hood is opened, ISG system will be
deactivated.
When the system is deactivated, a
message ‘Auto Stop is off. Shift to P or
N to start engine manually’ appears on
the cluster LCD display with a warning
sound.
If this occurs, depress the brake pedal
and restart the engine manually.
Auto start
When the engine stops automatically by
ISG, the engine will restart if one of the
following is done.
-Release the brake pedal.
-When Auto Hold is activated, take
your foot off the brake pedal and then
depress the accelerator pedal.
-While depressing the brake pedal,
shift the gear from N (Neutral) or D
(Drive) to R (Reverse) or P (Park).
-While depressing the brake pedal,
shift the gear from N (Neutral) to D
(Drive).
The Auto Stop (
) indicator turns into
white on the instrument cluster, when
the engine is restarted.
LCD display messages
The messages are displayed on the
instrument cluster to help use ISG
system.
ORS061032L
Auto Stop is Off. Shift to P or N and start
engine manually
When the system is deactivated, a
message will appear on the cluster LCD
display with a warning sound in the
following situations.
-When the engine hood is opened.
-When ISG system is not working
normally.
If this occurs, depress the brake pedal
and restart the engine manually. For your
safety, restart the vehicle in the P (Park)
position.

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06
Calibrating the Battery Sensor
If the AGM battery is reconnected or
replaced, ISG system will not operate
immediately. If you want to use the
system, the battery sensor needs to
be calibrated following the below
procedure.
ORS061023LA : Battery sensor
1. Turn off the engine.
2. Disconnect all electronic devices
that were additionally installed after
the vehicle was delivered, such as
navigation, dashcam, etc.
3. After 4 hours with the engine off, turn
the engine on and off 3 to 4 times.
Information
The ISG system may not operate in the
following situations.
-There is a malfunction with the ISG
system.
-The battery is weak.
-The brake vacuum pressure is low.
If this occurs, have the ISG system
checked by an authorized retailer of
Genesis Branded products.
NOTICE

[Use only a genuine Genesis ISG
battery for replacement. If not,
the ISG system may not properly
operate.

[Do not recharge the ISG battery with
a general battery charger. It may
damage or explode the ISG battery.

[Do not remove the battery cap. The
battery electrolyte, which is harmful
to the human body, may leak out.

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06
Coasting Release Conditions
The Coasting function will be
automatically released when the
following conditions are met.

[Comfort or Sport is selected for
driving mode

[The driver uses the paddle shifter

[Smart Cruise Control is activated (Set
speed appears on the cluster)

[The vehicle’s speed exceeds 30~100
mph (50~160 km/h) range

[The road gradient is under -5% or over
+5%

[If the distance between the vehicle
ahead is too close or the relative
speed changes momentarily in Smart
mode

[If lane change is predicated in Smart
mode (for example, the turn signal is
turned ON or a LKA warning appears
due to steering wheel control, etc.)
Information
It is recommended to turn off the
Coasting function if you are driving under
frequently stop-and-go condition. Change
the drive mode to Comfort or Sport or
deselect Coasting from the infotainment
system screen.
NOTICE

[If the accelerator pedal is pressed
quickly for accelerating with the
Coasting function in operation,
acceleration may occur after the
engagement of the clutch inside the
transmission. In turn, the driver may
continue to feel acceleration even
after the system is turned off.

[Driving with the Coasting function
off may be required in some cases
since the engine brake is not applied
while the Coasting function is
operating.

[Operating the infotainment system
screen to activate or deactivate
the Coasting function while driving
may be dangerous as the driver’s
attention is dispersed.

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06
When predictive shift is off

[When the system does not meet the
operating conditions.
ORS062041N

[When the drive mode is not in SMART.
ORS062042N
How Predictive Shift Operates
Predictive shift operates according to the
detected conditions.
Predictive shift in curve
If there is a curve ahead, the gear is
downshifted in advance to engage the
engine brake automatically. After passing
the curve, it will help the vehicle to
reaccelerate.
-If you drive smoothly through a curve,
or if the curve is gradual, predictive
shift does not operate.
-Predictive shift may operate if there is
a sharp curve, or the vehicle speed is
high when entering a highway ramp or
turning left or right on a crossroad.
Predictive shift to maintain speed
during downhill coasting
When coasting on a downhill, the engine
brake is automatically engaged to help
maintain the vehicle speed.
-If the slope is gentle or short,
predictive shift does not operate.
-If the downhill slope is steep, the
engine brake may be strongly
engaged to maintain speed.
-Depressing the brake or accelerator
pedal while predictive shift is being
activated will temporarily disable the
function.
CAUTION
Predictive shift to maintain speed
during downhill coasting is only to
assist the driver to drive safely on
a downhill. It does not accelerate
or decelerate the vehicle. If
acceleration or deceleration is
required, depress the pedal to
manually adjust the speed.

6-60
Driving Your Vehicle
Predictive shift in roundabout
If there is a roundabout ahead, the
predictive shift downshifts the gear
before entering the roundabout to assist
the driver to go through the roundabout
smoothly and reaccelerate the vehicle.
Predictive shift to accelerate when
entering highways (Interchange/Junction)
When entering the main road of
highways, the drive mode is temporarily
changed to SMART SPORT at the
interchange or junction to assist the
vehicle to accelerate easily.
-It also operates when entering an
expressway.
-While the SMART SPORT mode is
on, the red ‘SMART’ message will
illuminate on the instrument cluster.
-The drive mode will revert back to
SMART ECO or SMART COMFORT
when the vehicle has completely
entered the highways.
-Predictive shift operates only when
the vehicle is accelerated sufficiently
at the highways interchange or
junction to enter the main road. It
does not operate if the vehicle speed
is low.
-When entering the highways ramp
with the vehicle in SMART ECO mode,
the drive mode will automatically
change to SMART COMFORT. The
white ‘SMART’ message will illuminate
on the cluster.
-When predictive shift is operating, the
acceleration performance is equal to
that of when SPORT mode is selected
by pressing the drive mode button.
Predictive shift when approaching a
vehicle ahead
If the speed of the vehicle ahead is low
and the distance is getting closer, the
engine brake is engaged automatically to
assist in deceleration.
-When the vehicle reaches an
appropriate distance and the speed is
equal to the vehicle ahead, predictive
shift will be finished.
-If the brake or accelerator pedal
is depressed while predictive shift
is operating, the function will be
temporarily disabled.
-If there is a large difference of speed
from the vehicle ahead, the engine
brake may be engaged greatly to
obtain appropriate vehicle-to-vehicle
distance.
CAUTION
‘Predictive Shift when Approaching
to Vehicle Ahead’ is a function to
assist deceleration by detecting
the speed difference with the
vehicle ahead and does not directly
prevent collision. If the vehicle
ahead abruptly decelerates and
the distance rapidly decreases, the
driver must depress the brake pedal
to decelerate.

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06
CUSTOM Mode Features
SMART mode
SMART mode selects the proper driving
mode among SMART ECO, SMART
COMFORT and SMART SPORT by judging
the driver's driving habits (for example,
mild or dynamic) from the brake pedal
depression or the steering wheel
operation.
Various driving situations, which you may
encounter in SMART mode

[The driving mode automatically
changes to ECO mode after a certain
period of time, when you gently
depress the accelerator pedal (Your
driving is categorized to be mild.).

[The driving mode automatically
changes from SMART ECO mode
to SMART COMFORT mode after a
certain period of time, when you
sharply or repetitively depress the
accelerator pedal.

[The driving mode automatically
changes to SMART COMFORT mode
with the same driving patterns, when
the vehicle starts to drive on an
upward slope of a certain angle. The
driving mode automatically returns to
SMART ECO mode, when the vehicle
enters a leveled road.

[The driving mode automatically
changes to SMART SPORT mode
only in harsh driving situations. In
most of the normal driving situations,
the driving mode sets to be either
in SMART ECO mode or in SMART
COMFORT mode.
[The driving mode automatically
changes to SMART SPORT, when
you abruptly accelerate the vehicle
or repetitively operate the steering
wheel (Your driving is categorized
to be sporty.). In this mode, your
vehicle drives in a lower gear for
abrupt accelerating or decelerating
and increases the engine brake
performance.
For general description of SMART ECO,
SMART COMFORT, and SMART SPORT
modes, refer to “ECO, COMFORT, SPORT
mode features”.

6-68
Driving Your Vehicle
Driving in the Rain
Rain and wet roads can make driving
dangerous. Here are a few things to
consider when driving in the rain or on
slick pavement:

[Slow down and allow extra following
distance. A heavy rainfall makes
it harder to see and increases the
distance needed to stop your vehicle.

[Turn OFF your Smart Cruise Control

[Replace your windshield wiper blades
when they show signs of streaking or
missing areas on the windshield.

[Be sure your tires have enough tread.
If your tires do not have enough depth
of tire tread, making a quick stop on
wet pavement can cause a skid and
possibly lead to an accident. See “Tire
Tread” section in chapter 9.

[Turn on your headlights to make it
easier for others to see you.

[Driving too fast through large puddles
can affect your brakes. If you must go
through puddles, try to drive through
them slowly.

[If you believe your brakes may be wet,
apply them lightly while driving until
normal braking operation returns.
Hydroplaning
If the road is wet enough and you are
going fast enough, your vehicle may
have little or no contact with the road
surface and actually ride on the water.
The best advice is SLOW DOWN when
the road is wet.
The risk of hydroplaning increases as the
depth of tire tread decreases, refer to
“Tire Tread” section in chapter 9.
Driving in Flooded Areas
Avoid driving through flooded areas
unless you are sure the water is no
higher than the bottom of the wheel hub.
Drive through any water slowly. Allow
adequate stopping distance because
brake performance may be reduced.
After driving through water, dry the
brakes by gently applying them several
times while the vehicle is moving slowly.
Highway Driving
Tires
Adjust the tire inflation, as specified.
Under-inflation may overheat or damage
the tires.
Do not install worn-out or damaged tires,
which may reduce traction or fail the
braking operation.
Information
Never over-inflate your tires above the
maximum inflation pressure, as specified
on your tires.
Fuel, engine coolant and engine oil
Driving at higher speeds on the highway
consumes more fuel and is less efficient
than driving at a slower, more moderate
speed. Maintain a moderate speed in
order to conserve fuel when driving on
the highway.
Be sure to check both the engine coolant
level and the engine oil before driving.
Drive belt
A loose or damaged drive belt may
overheat the engine.

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06
The severe weather conditions of winter
quickly wear out tires and cause other
problems. To minimize winter driving
problems, you should take the following
suggestions:
Snow or Icy Conditions
You need to keep sufficient distance
between your vehicle and the vehicle in
front of you.
Apply the brakes gently. Speeding, rapid
acceleration, sudden brake applications,
and sharp turns are potentially
very hazardous practices. During
deceleration, use engine braking to the
fullest extent. Sudden brake applications
on snowy or icy roads may cause the
vehicle to skid.
To drive your vehicle in deep snow, it
may be necessary to use snow tires or to
install tire chains on your tires.
Always carry emergency equipment.
Some of the items you may want to carry
include tire chains, tow straps or chains,
a flashlight, emergency flares, sand, a
shovel, jumper cables, a window scraper,
gloves, ground cloth, coveralls, a blanket,
etc.
Summer tires

[Summer tires are used to maximize
the driving performance on dry roads.

[If the temperature is below 45°F or
you are driving on snowy or icy roads,
the summer tires lose their brake
performance and traction as the tire
grip weakens significantly.

[If the temperature is below 45°F or
you are driving on snowy or icy roads,
mount snow tires or all-season tires
of the same size with your vehicle's
standard tire for safe driving. Both
snow and all-season tires have M+S
markings.

[When using the M+S tires, use tires
with the same tread produced by the
same manufacturer for safe driving.

[When driving with the M+S tires with
the lower maximum allowable speed
than that of the vehicle's standard
summer tire, be careful not to exceed
the speed allowed for the M+S tires.
WINTER DRIVING