2020 HYUNDAI SONATA HYBRID transmission

Maintenance
8-12
Maintenance ItemMaintenance
operation Maintenance Intervals Driving
condition
Rear brake disc/pads IMore frequently C, D, G, F
Steering gear box,
linkage & boots/ lower
arm ball joint, upper arm
ball joint I
More frequently C, D, E, F, G,
H, I
Drive shafts and boots IEvery 7,500 miles (12,000 km) or
6 months C, D, E, F,
G, H, I, J
Automatic transmission
fluid R
Every 60,000 miles (96,000 km) A, C, D, E, F,

G, H, I, K
Parking brake IMore frequently C, D, G, H
Severe driving conditions
A. Repeatedly driving short distance of less than 5 miles (8 km) in normal temperature
or less than 10 miles (16 km) in freezing temperature
B. Extensive engine idling or low speed driving for long distances
C. Driving on rough, dusty, muddy, unpaved, graveled or saltspread roads
D. Driving in areas using salt or other corrosive materials or in very cold weather
E. Driving in sandy areas
F. Driving in heavy traffic area over 90°F (32°C)
G. Driving on uphill, downhill, or mountain road
H. Towing a Trailer, or using a camper, or roof rack
I. Driving as a patrol car, taxi, other commercial use or vehicle towing
J. Driving over 106 mph (170 km/h)
K. Frequently driving in stop-and-go conditions

08
8-13
Engine Oil and Filter
The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule. If the vehicle
is being driven in severe conditions,
more frequent oil and filter changes are
required.
HSG (Hybrid Starter & Generator)
Belt
The HSG belt should be changed at the
intervals specified in the maintenance
schedule.
Fuel Lines, Fuel Hoses and
Connections
Check the fuel lines, fuel hoses and
connections for leakage and damage.
Have an authorized HYUNDAI dealer
replace any damaged or leaking parts
immediately.
Fuel Filter
A clogged filter can limit the speed
at which the vehicle may be driven,
damage the emission system and cause
multiple issues such as hard starting. If
an excessive amount of foreign matter
accumulates in the fuel tank, the
filter may require replacement more
frequently. After installing a new filter,
run the engine for several minutes,
and check for leaks at the connections.
Fuel filters should be installed by an
authorized HYUNDAI dealer.
Vapor Hose and Fuel Filler Cap
The vapor hose and fuel filler cap should
be inspected at those intervals specified
in the maintenance schedule. Make sure
a new vapor hose or fuel filler cap is
correctly replaced.
Air Cleaner Filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark Plugs
Make sure to install new spark plugs of
the correct heat range.
Cooling System
Check cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
Engine Coolant/Inverter 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. But in severe conditions, the
fluid should be changed at an authorized
HYUNDAI dealer in accordance to the
scheduled maintenance at the beginning
of this chapter.
EXPLANATION OF SCHEDULED MAINTENANCE ITEMS

Maintenance
8-14
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 and you
should not judge the need to replace the
fluid based upon the changed color.
NOTICE
The use of a non-specified fluid could
result in transmission malfunction
and failure. Use only the specified
automatic transmission fluid (refer
to “Recommended Lubricants and
Capacities” in chapter 2).
Engine Clutch Actuator Fluid
The engine clutch actuator fluid level
should be inspected or replaced to the
intervals specified in the maintenance
schedule.
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.
Parking Brake
Inspect the parking brake system.
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.
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 hybrid
system 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.

08
8-33
WARNING
The traction grade assigned to
this tire is based on straightahead
braking traction tests, and does not
include acceleration, cornering,
hydroplaning, or peak traction
characteristics.
Temperature - A, B & C
The temperature grades are A (the
highest), B and C representing the
tire’s resistance to the generation
of heat and its ability to dissipate
heat when tested under controlled
conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life,
and excessive temperature can
lead to sudden tire failure. Grades
B and A represent higher levels of
performance on the laboratory test
wheel than the minimum required
by law.
WARNING
The temperature grade for this
tire is established for a tire that
is properly inflated and not
overloaded. Excessive speed,
under-inflation, over-inflation, or
excessive loading, either separately
or in combination, can cause heat
build-up and possible sudden
tire failure. This may cause loss
of vehicle control resulting in an
accident.
Tire Terminology and Definitions
Air Pressure
The amount of air inside the tire pressing
outward on the tire. Air pressure is
expressed in pounds per square inch
(psi) or kilopascal (kPa).
Accessory Weight
This means the combined weight
of optional accessories. Some
examples of optional accessories
are automatic transmission, power
seats, and air conditioning.
Aspect Ratio
The relationship of a tire’s height to
its width.
Belt
A rubber coated layer of cords that
is located between the plies and the
tread. Cords may be made from steel
or other reinforcing materials.
Bead
The tire bead contains steel wires
wrapped by steel cords that hold the
tire onto the rim.
Bias Ply Tire
A pneumatic tire in which the plies
are laid at alternate angles less than
90 degrees to the centerline of the
tread.

I
I-3
Automatic climate control system ....................................................................5-101
Automatic heating and air conditioning
........................................................5-102
Manual temperature control mode
................................................................5-103
Mode selection
........................................................................\
......................5-104
Instrument panel vents
........................................................................\
..........5-106
Temperature control
........................................................................\
..............5-106
Air intake control
........................................................................\
..................5-107
Fan speed control
........................................................................\
..................5-108
Driver only
........................................................................\
............................6-108
Air conditioning
........................................................................\
....................5-109
OFF mode ........................................................................\
.............................. 5-109
System operation
........................................................................\
...................5-109
System maintenance
........................................................................\
...............5-111
Air conditioning refrigerant label .................................................................. 5-112
Automatic transmission
........................................................................\
...............6-10
Shift-lock system
........................................................................\
.....................6-12
Parking
........................................................................\
....................................6-13
Good driving practices
........................................................................\
............6-15
Paddle shifter (manual shift mode)
.................................................................6-16
USB and iPod® port ........................................................................\
...................5-126
B
Battery saver function
........................................................................\
..................5-77
Before driving
........................................................................\
................................6-5
Blind-Spot Collision Warning (BCW)
.................................................................6-65
Blind-Spot Collision-Avoidance Assist (BCA)
...................................................6-65
Blind-Spot View Monitor (BVM)
.......................................................................6-86
Blue Link® center
........................................................................\
.....................5-128
Bluetooth® Wireless Technology hands-free
....................................................5-128
Brake fluid
........................................................................\
...................................8-20
Brake system
........................................................................\
................................6-18
Power brakes
........................................................................\
..........................6-18
Disc brakes wear indicator
........................................................................\
.....6-19
Electronic Parking Brake (EPB)
....................................................................6-19
Auto Hold
........................................................................\
...............................6-24
Anti-lock Brake System (ABS)
......................................................................6-27

I
I-9
I
If the 12 volt battery is discharged
........................................................................\
7-4
If the engine overheats
........................................................................\
..................7-7
If the engine stalls at a crossroad or crossing
........................................................7-2
If the engine stalls while driving
........................................................................\
..7-2
If the engine will not start
........................................................................\
.............7-3
If you have a flat tire while driving
......................................................................7-3
Ignition switch
........................................................................\
..............................6-6
Engine Start/Stop button
........................................................................\
..........6-6
Remote start
........................................................................\
.............................6-9
Immobilizer system
........................................................................\
....................5-11
Important safety precautions ........................................................................\
.......... 3-2
Always wear your seat belt
........................................................................\
......3-2
Restrain all children
........................................................................\
.................3-2
Air bag hazards
........................................................................\
........................3-2
Driver distraction
........................................................................\
.....................3-2
Control your speed
........................................................................\
...................3-2
Keep your vehicle in safe condition
.................................................................3-2
In case of an emergency while driving
.................................................................7-2
Infotainment system ........................................................................\
................... 5-126
USB and iPod® port
........................................................................\
............5-126
Antenna
........................................................................\
................................5-126
Steering wheel audio controls
......................................................................5-127
Bluetooth® Wireless Technology hands-free ...............................................5-128
Audio / Video / Navigation system
..............................................................5-128
Blue Link® center
........................................................................\
................5-128
Inside rearview mirror
........................................................................\
................5-42
Instrument cluster
........................................................................\
.........................4-4
Adjusting instrument cluster illumination
........................................................4-5
Gauges and meters
........................................................................\
...................4-5
Transmission shift indicator
........................................................................\
.....4-9
Warning and indicator lights
........................................................................\
..4-10
LCD display messages
........................................................................\
...........4-19
LCD display (Type A, B)
........................................................................\
.......4-26
LCD display (Type C)
........................................................................\
............4-39