2020 Hyundai Sonata engine

While Driving6-34
When the system is deactivated:
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The ISG OFF button indicator illuminates.
If the message "Auto Stop is Off.
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Start vehicle manually", appears on the
LCD display with a beep sound, restart
the vehicle manually by depressing the
brake pedal with the vehicle shifted
to P (Park) or N (Neutral). For your
safety, restart the vehicle in the P (Park)
position.
Auto start
To restart the engine in the auto stop
mode
Release the brake pedal.
- When Auto Hold is activated, if you release the brake pedal, the engine will
be in the auto stop state. However, if
you depress the accelerator pedal, the
engine will start again.
The auto stop indicator () goes OFF on
the instrument cluster, when the engine
is restarted.
The engine is automatically restarted in
the following situations.
• The brake vacuum pressure is low
•
The engine has stopped for about 5
minutes
• The air conditioning is ON with the fan speed set to the highest position
• The front defroster is ON
• The battery is weak
• The cooling and heating performance of the climate control system is
unsatisfactory
• The vehicle is shifted to P (Park) when Auto Hold is activated
• The door is opened or the seatbelt is unfastened when Auto Hold is
activated
• The EPB switch is pressed when Auto Hold is activated
The auto stop indicator (
) blinks in
green for 5 seconds on the instrument
cluster.

06
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The auto start is temporarily deactivated
in the following situations.
When the gear is shifted from N (Neutral)
t
o R (Reverse), D (Drive) or Manual
shift mode without the brake pedal
depressed. A message "Press brake pedal
for Auto Start" will appear on the LCD
display. To activate auto start, depress
the brake pedal.
To Deactivate the ISG System
• Press the ISG OFF button to deactivate the ISG system. Then, the
ISG OFF button indicator illuminates.
• Press the ISG OFF button again to reactivate the ISG system. Then, the
ISG OFF button indicator turns OFF.
ISG System Malfunction
The ISG system may not operate:
When there is a malfunction with the ISG
sensor
s or the ISG system.
The followings occur, when there is a
malfunction with the ISG system:
• The auto stop indicator (
) will blink
in yellow on the instrument cluster.
• The light on the ISG OFF button will illuminate.
Information
• When you cannot turn OFF the ISG
OFF button indicator by pressing
the ISG OFF button, or when the
malfunction with the ISG system
persists, contact an authorized
HYUNDAI dealer.
• You can turn off the ISG OFF button
indicator by driving over 50 mph (80
km/h) for up to 2 hours with the fan
speed below the 2nd position. If the
ISG OFF button indicator remains
ON, contact an authorized HYUNDAI
dealer.
WARNING
When the engine is in auto stop mode,
the engine may restart. Before leaving
the vehicle or checking the engine
compartment, stop the engine placing
the ignition switch to the LOCK/OFF
position or remove the ignition key.

While Driving6-36
Battery Sensor Deactivation
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[A] : Battery sensor
The battery sensor is deactivated, when
the battery is disconnected from the
negative pole for maintenance purpose.
In this case, the ISG system is limitedly
operated due to the battery sensor
deactivation. Thus, the driver needs
to take the following procedures to
reactivate the battery sensor after
disconnecting the battery.
Prerequisites to reactivate the
battery sensor
Switch "ON" and "OFF" the ignition one
time. Park the vehicle for a minimum of 4
hours with the hood and all doors closed.
Pay extreme caution not to connect any
accessories (i.e. navigation and black
box) to the vehicle with the engine in the
OFF status. If not, the battery sensor may
not be reactivated.
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 HYUNDAI
dealer.
NOTICE
• Use only a genuine HYUNDAI
Absorbent Glass Mat (AGM) battery
for replacement. If not, the ISG
system may not operate normally.
• Do not recharge the Absorbent Glass
Mat (AGM) battery with a general
battery charger. It may damage or
explode the Absorbent Glass Mat
(AGM) battery.
• Do not remove the battery cap. The
battery electrolyte, which is harmful
to the human body, may leak out.

06
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DRIVE MODE INTEGRATED CONTROL SYSTEM (IF EQUIPPED)
Drive Mode
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The drive mode may be selected
according to the driver’s preference or
road condition.
Information
If there is a problem with the
instrument cluster, the drive mode will
be in COMFORT mode and may not
change to NORMAL mode or SPORT
mode.
The mode changes when you toggle the
DRIVE MODE button.
CUSTOM
SPORT
NORMAL
SMART
When COMFORT mode is selected, it is
not displayed on the instrument cluster.
• NORMAL mode :NORMAL mode helps provide smooth
driving and comfortable riding.
• SPORT mode : SPORT mode helps provide sporty but
firm riding.
• CUSTOM mode :
The driver can separately adjust
modes of each driving system.
• SMART mode :
SMART mode automatically adjusts
the driving mode (NORMAL « SPORT)
in accordance with the driver's driving
habits.
The drive mode will change to NORMAL
mode when the engine is restarted.
When changing the drive mode setting,
the responsiveness of Smart Cruise
Control changes.
Drive Mode SCC Reaction
NORMAL Normal
SMART Normal
SPORT Fast
In CUSTOM mode, SCC Reaction
operates according to the mode set in
the Engine/Transmission.
(e.g. in CUSTOM mode, the driver select
mode of Engine/Transmission as SPORT,
SCC Reaction operates as Fast)

While Driving6-38
CUSTOM mode
In CUSTOM mode, the driver
can select separate modes
and combine them on the
infotainment system screen.
- Engine/Transmission: NORMAL/ SPORT
- Steering wheel: NORMAL/SPORT
For more infomation, refer to the
separately supplied manual with your
vehicle.
• When CUSTOM mode is selected by using the DRIVE MODE button,
the CUSTOM mode indicator will
illuminate.
SPORT mode
SPORT mode manages the
driving dynamics by
automatically adjusting the
steering effort, the engine
and transmission control
logic for enhanced driver
performance.
• When SPORT mode is selected by using the DRIVE MODE button, the
SPORT indicator will illuminate.
• Whenever the engine is restarted, the Drive Mode will revert back to
NORMAL mode. If SPORT mode is
desired, re-select SPORT mode from
the DRIVE MODE button.
• When SPORT mode is activated: - The engine rpm will tend to remain raised over a certain length of time
even after releasing the accelerator
- Upshifts are delayed when accelerating
Information
In SPORT mode, the fuel efficiency may
decrease.
SMART mode
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SMART mode selects the
proper driving mode among
NORMAL and SPORT by
judging the driver’s driving
habits (i.e. Economic or
Aggressive (Sportive)) from
the brake pedal depression
or the steering wheel
operation.
• Toggle the DRIVE MODE button to select SMART mode. When SMART
mode is selected, the indicator
illuminates on the instrument cluster.
• SMART mode automatically controls the vehicle driving, such as gear
shifting patterns and engine torque,
in accordance with the driver’s driving
habits.
Information
When you dynamically drive the vehicle
in SMART mode by abruptly decelerating
or sharply turning the driving mode
changes to SPORT mode. However, it may
adversely affect fuel economy.

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Various driving situations, which you may
encounter in SMART mode
• The driving mode automatically changes t
o 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/decelerating
and increases the engine brake
performance.
• You may still sense the engine braking performance, even when
you release the accelerator pedal in
SMART SPORT mode. It is because
your vehicle remains in lower gear
over a certain period of time for next
acceleration. Thus, it is a normal
driving situation, not indicating any
malfunction.
• 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 in SMART
NORMAL mode. Limitation of SMART mode
The SMART mode may be limited in
f
ollowing situations. (The OFF indicator
illuminates in those situations.)
• The driver uses the paddle shifter (manual shift mode) :
It deactivates SMART mode. The
vehicle drives, as the driver manually
changes gear with the paddle shifter.
• The cruise control is activated :
The cruise control system may
deactivate the SMART mode when
the vehicle is controlled by the set
speed of Smart Cruise Control system.
(SMART mode is not deactivated
just by activating the cruise control
system.)
• The transmission oil temperature is either extremely low or extremely
high :
The SMART mode can be active in
most of the normal driving situations.
However, an extremely high/ low
transmission oil temperature may
temporarily deactivate the SMART
mode, because the transmission
condition is out of normal operation
condition.

While Driving6-42
Prerequisite for activation
FCA gets ready to be activated, when
‘Active Assist’ or ‘Warning Only’ under
Forward Safety is selected in the cluster
LCD display, and when the following
prerequisites are satisfied.
- ESC (Electronic Stability Control) is on.
- Vehicle speed is over 6 mph (10 km/h ).
(FCA is only activated within a certain
speed range.)
- The system detects a pedestrian, cyclist or a vehicle in front, which may
collide with your vehicle. However,
FCA may not be activated or may only
sound a warning alarm depending on
the driving or vehicle conditions.
FCA may not operate properly according
to the frontal situation, condition of the
vehicle, the direction of pedestrian or
cyclist or speed. If you select "Warning
Only", only warnings occur.
WARNING
To avoid driver distractions, do not
attempt to set or cancel FCA while
driving the vehicle. Always completely
stop the vehicle at a safe place before
setting or canceling the system.
FCA automatically activates upon
placing the ignition switch to the ON
position. The driver can deactivate FCA
by canceling the system setting on the
cluster LCD display or infotainment
system display (if equipped).
FCA automatically deactivates upon
canceling ESC (Electronic Stability
Control). When ESC is canceled, FCA
cannot be activated in the LCD display
or infotainment system display (if
equipped). In this situation, the FCA
warning light will illuminate which is
normal.
FCA Warning Message and Brake
Control
FCA produces warning messages,
warning alarms, and emergency braking
based on the level of risk of a frontal
collision, such as when a vehicle ahead
suddenly brakes, or the system detects
that a collision with a pedestrian or
cyclist is imminent.
Collision warning (First warning)
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This warning message appears on the
LCD display with a warning chime.
Additionally, some vehicle system
intervention occurs by the engine
management system to help decelerate
the vehicle.

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• Your vehicle speed may decelerate moderately.
• If FCA detects a vehicle in front, the system operates when your vehicle
speed is between 6 mph (10 km/h )
and 112 mph (180 km/h). Maximum
vehicle speed may decrease
depending on the condition of the
vehicle ahead and surroundings.
• If FCA detects a pedestrian or cyclist in front, the system operates when
your vehicle speed is between 6
mph (10 km/h ) and 53 mph (85
km/h). Maximum vehicle speed may
decrease depending on the condition
of the pedestrian or cyclist ahead and
surroundings.
• If you select ‘Warning Only’ for the system setting, FCA system activates
and produces only warning alarms
in accordance with the collision risk
levels. You should control the brake
directly because FCA system will not
control the brake.Emergency braking (Second
warning)
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This warning message appears on the
LCD display with a warning chime.
Additionally, some vehicle system
intervention occurs by the engine
management system to help decelerate
the vehicle.
• FCA system limitedly controls the brakes to preemptively mitigate
impact in a collision. The brake control
is maximized just before a collision.
• If FCA detects a vehicle in front, the system operates when your vehicle
speed is above 6 mph (10 km/h ) and
47 mph (75 km/h) or under. Maximum
vehicle speed may decrease
depending on the condition of the
vehicle ahead and surroundings.
• If FCA detects a pedestrian or cyclist in front, the system operates when
your vehicle speed is between 6 mph
(10 km/h) or above and under 40 mph
(65 km/h). Maximum vehicle speed
may decrease depending on the
condition of the pedestrian or cyclist
ahead or surroundings.
• If you select ‘Warning Only’ for the system setting, FCA system activates
and produces only warning alarms
in accordance with the collision risk
levels. You should control the brake
directly because FCA system will not
control the brake.