Eco HYUNDAI SONATA 2021 Service Manual

Instrument Cluster
4-10
AUTO HOLD Indicator Light
(if equipped)
This indicator light illuminates:
• [White] When you activate the auto
hold system by pressing the AUTO
HOLD button.
• [Green] When you stop the vehicle
completely by depressing the brake
pedal with the auto hold system
activated.
• [Yellow] When there is a malfunction
with the auto hold system.
In this case, have the vehicle
inspected by an authorized HYUNDAI
dealer.
For more information, refer to “Auto
Hold” in chapter 6.
Electric Power Steering (EPS)
Warning Light
This warning light illuminates:
• When you place the ignition switch to
the ON position.
-The

Electric Power Steering Warning
light illuminates for about 3 seconds
and then goes off.
• Whenever there is a malfunction with
the EPS.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.
Malfunction Indicator Lamp
(MIL)
This warning light illuminates:
• When you place the ignition switch to
the ON position.
- The malfunction indica

tor light
illuminates for about 3 seconds and
then goes off.
• Whenever there is a malfunction with
either the emission control system or
the engine or the vehicle powertrain.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.
NOTICE
Driving with the Malfunction Indicator
Lamp (MIL) on may cause damage to
the emission control system which
could affect drivability and/or fuel
economy.
NOTICE
If the Malfunction Indicator Lamp
(MIL) illuminates, potential catalytic
converter damage is possible which
could result in loss of engine power.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer as
soon as possible.

Instrument Cluster
4-12
Master Warning Light
This indicator light illuminates:
When there is a malfunction in operation
in any of the following systems:
- F
orward Collision-Avoidance Assist
system malfunction (if equipped)
- F

orward Collision-Avoidance Assist
radar blocked (if equipped)
- Blind-

Spot Collision Warning system
malfunction (if equipped)
- Blind-

Spot Collision Warning radar
blocked (if equipped)
- High Beam Assis

t malfunction (if
equipped)
- Lamp malfunction (if equipped)
- Smart Cruise Con

trol malfunction (if
equipped)
- Tir

e Pressure Monitoring System
(TPMS) malfunction (if equipped)
To identify the details of the warning,
look at the LCD display.
Low Tire Pressure Warning
Light (if equipped)
This warning light illuminates:
• When you place the ignition in the ON
position.
- It illumina

tes for approximately 3
seconds and then goes off.
• When one or more of your tires are
significantly underinflated. (The
location of the underinflated tires is
displayed on the LCD display.)
For more information, refer to "Tire
Pressure Monitoring System (TPMS)" in
chapter 7. This warning light remains ON after
blinking for approximately 60 seconds, or
repeatedly blinks ON and OFF in 3 second
intervals:
When there is a malfunction with the
TPMS.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer as
soon as possible.
For more information, refer to "Tire
Pressure Monitoring System (TPMS)" in
chapter 7.
WARNING
Safe Stopping
•
The TPMS cannot alert you to severe
and sudden tire damage caused by
external factors.
• If you notice any vehicle instability,
immediately take your foot off the
accelerator pedal, apply the brakes
gradually with light force, and slowly
move to a safe position off the road.
Electronic Stability Control
(ESC) Indicator Light
This indicator light illuminates:
• When you place the ignition switch to
the ON position.
- The Electr

onic Stability Control
indicator light illuminates for about
3 seconds and then goes off.
• Whenever there is a malfunction with
the ESC system.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.
This indicator light blinks:
While the ESC is operating.
For more information, refer to
“Electronic Stability Control (ESC)” in
chapter 6.

04
4-13
Electronic Stability Control
(ESC) OFF Indicator Light
This indicator light illuminates:
• When you place the ignition switch to
the ON position.
- It illumina

tes for approximately 3
seconds and then goes off.
• When you deactivate the ESC system
by pressing the ESC OFF button.
For more information, refer to
“Electronic Stability Control (ESC)” in
chapter 6.
Immobilizer Indicator Light
This indicator light illuminates:
• When the vehicle detects the
immobilizer in the key with the
ignition switch in the ON position.
- A

t this time, you can start the engine.
- The indica

tor light goes off after
starting the engine.
This indicator light blinks:
• When there is a malfunction with the
immobilizer system.
If this occurs, have the vehicle inspected
by an authorized HYUNDAI dealer.
Immobilizer Indicator Light
(with smart key)
(if equipped)
This indicator light illuminates for up to
30 seconds:
When the vehicle detects the smart key
in the vehicle with the Engine Start/Stop
button in the ACC or ON position.
- Once the smart k

ey is detected, you
can start the engine.
- The indica

tor light goes off after
starting the engine.
This indicator light blinks for a few seconds:
When the smart key is not in the vehicle.
- If the smart k

ey is not detected, you
cannot start the engine.
This indicator light illuminates for 2
seconds and goes off:
If the smart key is in the vehicle and the
Engine Start/Stop button is ON, but the
vehicle cannot detect the smart key.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer.
This indicator light blinks:
When there is a malfunction with the
immobilizer system.
In this case, have the vehicle inspected
by an authorized HYUNDAI dealer.

04
4-15
Forward Collision-Avoidance
Assist Warning Light
(if equipped)
This warning light illuminates:
• When you set the ignition switch or
Engine Start/Stop button to the ON
position.
- It illumina

tes for approximately 3
seconds and then goes off.
• When there is a malfunction with
FCA. In this case, have your vehicle
inspected by an authorized dealer of
HYUNDAI.
For more information, refer to "Forward
Collision-Avoidance Assist (FCA)" in
chapter 6.
Lane Keep Assist Indicator
Light (if equipped)
This indicator light illuminates:
• [Green] When you activate the lane
departure warning system by pressing
the LKA button and all of the system
operating conditions are satisfied.
• [White] When system operating
conditions are not satisfied or when
the sensor does not detect the lane
line.
• [Yellow] When there is a malfunction
with Lane Keeping Assist system.
In this case, have your vehicle inspected
by an authorized HYUNDAI dealer.
For more information, refer to "Lane
Keeping Assist (LKA)" in chapter 6.
LCD Display Messages
Shift to P or N to start engine
(for smart key system)
This warning message is displayed if
you try to start the engine with the shift
button not in the P (Park) or N (Neutral)
position.
Information
You can start the engine with the shift
button in the N (Neutral) position. But, for
your safety, we recommend that you start
the engine with the shift button in the P
(Park) position.
Shift to P (for smart key system)
This message is displayed if you try to
turn off the engine without the shift
button in P (Park) position.
If this occurs, the Engine Start/Stop
button turns to the ACC position (If you
press the Engine Start/Stop button once
more, it will turn to the ON position).
Low key battery
(for smart key system)
This warning message is displayed if the
battery of the smart key is discharged
while changing the Engine Start/Stop
button to the OFF position.
Press brake pedal to start engine
(for smart key system)
This warning message is displayed if the
Engine Start/Stop button changes to
the ACC position twice by pressing the
button repeatedly without depressing
the brake pedal.
You can start the vehicle by depressing
the brake pedal and then pressing the
Engine Start/Stop button.

Instrument Cluster
4-16
Key not in vehicle
(for smart key system)
This warning message is displayed if the
smart key is not in the vehicle when you
press the Engine Start/Stop button.
When attempting to start the vehicle,
always have the smart key with you.
Key not detected
(for smart key system)
This warning message is displayed if the
smart key is not detected when you press
the Engine Start/Stop button.
Press START button again
(for smart key system)
This message is displayed if you were
unable to start the vehicle when the
Engine Start/Stop button was pressed.
If this occurs, attempt to start the engine
by pressing the Engine Start/Stop button
again.
If the warning message appears each
time you press the Engine Start/Stop
button, have your vehicle inspected by
an authorized HYUNDAI dealer.
Battery discharging due to external
electrical devices (if equipped)
This message is displayed if the battery
voltage is weak due to any non-factory
electrical accessories (ex. dashboard
camera) while parking. Be careful that
the battery is not discharged.
If the warning message appears after
removing the non-factory electrical
accessories, have the vehicle inspected
by an authorized HYUNDAI dealer.
Press START button with key
(for smart key system)
This warning message is displayed if you
press the Engine Start/Stop button while
the warning message "Key not detected"
is displayed.
At this time, the immobilizer indicator
light blinks.
Check BRAKE SWITCH fuse
(for smart key system)
This warning message is displayed if the
brake switch fuse is disconnected.
You need to replace the fuse with a new
one before starting the engine.
If that is not possible, you can start the
engine by pressing the Engine Start/
Stop button for 10 seconds in the ACC
position.

Instrument Cluster
4-20
LCD Display Modes
ModesSymbol Explanation
Trip Computer
This mode displays driving information such as the
tripmeter, fuel economy, etc.
Turn By Turn (TBT)
This mode displays the state of the navigation.
Drive Assist
(if equipped)
This mode displays the state of: - Smart Cruise Con trol system
Lane Following Assist system
Lane Keeping Assist system
- Driv

er Attention Warning system
- Tir

e pressure
User Settings
The User Settings menu provides user options for
a variety of settings including door lock/unlock
features, convenience features, driver assistance
settings, etc.
Master Warning
The Warning mode displays warning messages
related to the vehicle when one or more systems is
not operating normally.
The information provided may differ depending on which functions are applicable
to your vehicle.

04
4-21
Trip computer mode
OIK047124N
The trip computer mode displays
information related to vehicle driving
parameters including fuel economy, trip
meter information and vehicle speed.
For more information, refer to "Trip
Computer" in this chapter.
Turn By Turn (TBT) mode
OIK047147N
This mode displays the state of the
navigation.
Driving Assist mode
ODN8A049021
SCC/LFA/LKA, DAW
This mode displays the state of Smart
Cruise Control system, Lane Following
Assist system, Lane Keeping Assist
system and Driver Attention Warning
system.
For more information, refer to each
system information in chapter 6.
ODN8049019L
Tire Pressure
This mode displays information related to
Tire Pressure.
For more information, refer to "Tire
Pressure Monitoring System (TPMS)" in
chapter 7.

04
4-27
3. Door
ItemsExplanation
Auto Lock •
Disable : The auto door lock operation will be deactivated.
•
E

nable on Speed: All doors will be automatically locked when the
vehicle speed exceeds 9 mph (15 km/h).
•
E

nable on Shift: All doors will be automatically locked if the
automatic transmission shift button is pressed from the P (Park)
position to the R (Reverse), N (Neutral), or D (Drive) position. (Only
when the engine is running.)
Auto Unlock •
Disable : The aut

o door unlock operation will be canceled.
•
On k

ey out/Vehicle Off : All doors will be automatically unlocked
when the ignition key is removed from the ignition switch or the
Engine Start/Stop button is set to the OFF position.
•
On Shift t

o P: All doors will be automatically unlocked if the
automatic transmission shift button is pressed to P (Park) position.
(Only when the engine is running.)
Two Press Unlock •
Off: The tw

o press unlock function will be deactivated. Therefore,
all doors will unlock if the door unlock button is pressed.
•
On: Only the driv

er’s door will unlock if the door unlock button is
pressed. When the door unlock button is pressed again within 4
seconds, the remaining doors will unlock.
Horn Feedback To activate or deactivate the horn feedback.
If the horn feedback is activated, after locking the door by pressing
the lock button on the remote key, and pressing it again within 4
seconds, the horn feedback sound will operate once to indicate that
all doors are locked (if equipped with remote key).
Smart Trunk To activate or deactivate the smart trunk.
For more information, refer to “Smart trunk” in chapter 5.
4. Lights
Items
Explanation
One Touch Turn
Signal •
Off: The one touch turn signal function will be deactivated.
•
3, 5, 7 Flashes: The turn signal indica

tor will blink 3, 5, or 7 times
when the turn signal lever is moved slightly.
For more information, refer to “Lighting” in chapter 5.
Ambient Light
Brightness To adjust the brightness of the ambient light.
Ambient Light Color To select the ambient light color.
Headlight Delay •
To activate or deactivate the headlamp delay function.
For more information, refer to “Lighting” in chapter 5.
High Beam Assist •
To activate or deactivate the High Beam Assist (HBA) function.
For more information, refer to “High Beam Assist (HBA)” in
chapter 5.

Instrument Cluster
4-30
8. Other
ItemsExplanation
Fuel Econ. Reset •
Off: The average fuel economy will not reset automatically
whenever refueling.
• After ignition: When the engine has been OFF for 4 hours or longer
the average fuel economy will reset automatically.
• After refueling: The average fuel economy will reset automatically
after adding 1.6 gallons (6 liters) of fuel or more and after driving
speed exceeds 1 mph (1 km/h).
For more information, refer to “Trip Computer” in this chapter.
Fuel Econ. Unit To select the fuel economy unit.
Temperature Unit To select the temperature unit. (°C,°F)
Tire Pressure Unit To select the tire pressure unit. (psi, kPa, bar)
9. Language (if equipped)
Items
Explanation
Language Choose the language. You can choose the language in infotainment
system. (if equipped)
10. Reset
Items
Explanation
Reset You can reset the menus in the User Settings Mode. All menus in the
User Settings Mode are reset to factory settings, except language
and service interval.

04
4-31
Trip Computer
The trip computer is a microcomputer-
controlled driver information system that
displays information related to driving.
Information
Some driving information stored in the
trip computer (for example Average
Vehicle Speed) resets if the battery is
disconnected.
Trip modes
ODN8A069203
To change the trip mode, toggle the “, ” switch on the steering wheel.
Average fuel economy/
Instant fuel economy
ODN8A059342
Average Fuel Economy (1)
• The average fuel economy is
calculated by the total driving
distance and fuel consumption since
the last average fuel econ

om
y reset.
• The average fuel economy can
be reset both manually and
automatically.
Manual reset
To clear the average fuel economy
manually, press the OK button on the
steering wheel for more than 1 second
when the average fuel economy is
displayed.
Fuel Economy
• Average Fuel Economy
• Instant Fuel Economy

Accumulated Info
• Tripmeter
• Average Fuel Economy
• Elapsed Time

Drive Info
• Tripmeter
• Average Fuel Economy
• Elapsed Time

Digital Speedometer

Auto Stop (if equipped)
• Auto Stop accumulated
time

Smart Shift