stop start Hyundai Sonata Plug-in Hybrid 2018 Owners Manual

7-5
7
Maintenance
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The following lists are vehicle checks
and inspections that should be per-
formed by the owner or an author-
ized HYUNDAI dealer at the frequen-
cies indicated to help ensure safe,
dependable operation of your vehi-
cle.
Any adverse conditions should be
brought to the attention of your deal-
er as soon as possible.
These Owner Maintenance vehicle
checks are generally not covered by
warranties and you may be charged
for labor, parts and lubricants used.
Performing maintenance work
on a vehicle can be dangerous.
If you lack sufficient knowledge
and experience or the proper
tools and equipment to do the
work, have it done by an author-
ized HYUNDAI dealer. ALWAYS
follow these precautions for
performing maintenance work:
Park your vehicle on level
ground, move the shift lever
into the P (Park, for automatic
transmission vehicle) posi-
tion, apply the parking brake,
place the Engine Start/Stop
button in the OFF position.
Block the tires (front and back)
to prevent the vehicle from
moving.
Remove loose clothing or jew-
elry that can become entan-
gled in moving parts.
(Continued)
WARNING (Continued)
If you must run the engine
during maintenance, do so
out doors or in an area with
plenty of ventilation.
Keep flames, sparks, or smok-
ing materials away from the
battery and fuel-related parts.
When you open the engine
hood, turn the hybrid system
off. If not, It may result in death
or serious injury because of
the high voltage flow.

7-16
Maintenance
Brake discs, pads, calipers
and rotors
Check the pads for excessive wear,
discs for run out and wear, and
calipers for fluid leakage.
For more information on checking
the pads or lining wear limit, refer to
the HYUNDAI web site.
(http://ser
vice.hyundai-motor.com)
Exhaust pipe and muffler
Visually inspect the exhaust pipes,
muffler and hangers for cracks, dete-
rioration, or damage. Start the
engine and listen carefully for any
exhaust gas leakage. Tighten con-
nections or replace parts as neces-
sary.
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 exces-
sive free-play in the steering wheel.
Check the linkage for bends or dam-
age. 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.

7-31
7
Maintenance
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When you do not use the vehicle
for a long time in a low tempera-
ture area, disconnect the battery
and keep it indoors.
Always charge the battery fully to prevent battery case damage
in low temperature areas.
NOTICE
To prevent SERIOUS INJURY or
DEATH to you or bystanders,
always follow these precautions
when working near or handling
the battery:
Always read and follow
instructions carefully
when handling a battery.Wear eye protection
designed to protect the
eyes from acid splashes.
Keep all flames, sparks,
or smoking materials
away from the battery.
Hydrogen is always pres- ent in battery cells, is
highly combustible, and
may explode if ignited.
Keep batteries out of
reach of children.
Batteries contain sulfu-
ric acid which is highly
corrosive. Do not allow
acid to contact your
eyes, skin or clothing.
(Continued)
WARNING (Continued)
If acid gets into your eyes, flush
your eyes with clean water for at
least 15 minutes and get imme-
diate medical attention. If acid
gets on your skin, thoroughly
wash the area. If you feel pain or
a burning sensation, get med-
ical attention immediately.
When lifting a plastic-cased
battery, excessive pressure
on the case may cause battery
acid to leak. Lift with a battery
carrier or with your hands on
opposite corners.
Do not attempt to jump start
your vehicle if your battery is
frozen.
NEVER attempt to recharge
the battery when the vehicle’s
battery cables are connected
to the battery.
The electrical ignition system
works with high voltage.
NEVER touch these compo-
nents with the engine running
or when the Engine Start/Stop
button is in the ON position.
CALIFORNIA PROPOSITION 65
WARNING
Battery posts, terminals, and
related accessories contain
lead and lead compounds,
chemicals known to the State of
California to cause cancer, birth
defects and reproductive harm.
Batteries also contain other
chemicals known to the State of
California to cause cancer.
Wash hands after handling.
WARNING

7-32
Maintenance
For best battery service Keep the battery securely mounted.
Keep the battery top clean and dry.
Keep the terminals and connec-tions clean, tight, and coated with
petroleum jelly or terminal grease.
Rinse any spilled acid from the bat- tery immediately with a solution of
water and baking soda.Battery recharging
Always follow these instructions
when recharging your vehicle’s
battery to avoid the risk of SERI-
OUS INJURY or DEATH from
explosions or acid burns:
Before performing mainte-
nance or recharging the bat-
tery, turn off all accessories and
place the Engine Start/Stop
button to the OFF position.
Keep all flames, sparks, or
smoking materials away from
the battery.
Always work outdoors or in an
area with plenty of ventilation.
Wear eye protection when
checking the battery during
charging.
The battery must be removed
from the vehicle and placed in
a well ventilated area.
(Continued)
WARNING
OLFH047757
OLFP047757
■Hybrid
■Plug-in hybrid

7-33
7
Maintenance
By jump starting
After a jump start from a good bat-
tery, drive the vehicle for 20-30 min-
utes before it is shutoff. The vehicle
may not restart if you shut it off
before the battery had a chance to
adequately recharge. See "Jump
Starting" in chapter 6 for more infor-
mation on jump starting procedures.
Information
An inappropriately disposedbattery can be harmful to
the environment and human
health.
Dispose the battery according to your
local law(s) or regulation.
Reset features
Some items need to be reset after
the battery has been discharged or
the battery has been disconnected.
See chapter 3 for:
Power Windows
Trip Computer
Climate Control System
Clock
Audio System
Sunroof
i
(Continued)
Watch the battery during
charging, and stop or reduce
the charging rate if the battery
cells begin boiling violently.
The negative battery cable
must be removed first and
installed last when the battery
is disconnected. Disconnect
the battery charger in the fol-
lowing order:
(1) Turn off the battery charger main switch.
(2) Unhook the negative
clamp from the negative
battery terminal.
(3) Unhook the positive clamp from the positive battery
terminal.
Always use a genuine HYUNDAI
approved battery when you
replace the battery.

7-86
Maintenance Do not operate the engine in con-fined or closed areas (such as
garages) any more than what is
necessary to move the vehicle in or
out of the area.
When the vehicle is stopped in an open area for more than a short
time with the engine running,
adjust the ventilation system (as
needed) to draw outside air into the
vehicle.
Never sit in a parked or stopped vehicle for any extended time with
the engine running.
When the engine stalls or fails to start, excessive attempts to restart
the engine may cause damage to
the emission control system.
Operating precautions for cat-alytic converters (if equipped)
The exhaust system and cat-
alytic converter are very hot
during and immediately after
the engine has been running. To
avoid SERIOUS INJURY or
DEATH:
Do not park, idle, or drive the
vehicle over or near flamma-
ble objects, such as grass,
vegetation, paper, leaves, etc.
A hot exhaust system can
ignite flammable items under
your vehicle.
Keep away from the exhaust
system and catalytic convert-
er or you may get burned.
Also, Do not remove the heat
sink around the exhaust sys-
tem, do not seal the bottom of
the vehicle, and do not coat
the vehicle for corrosion con-
trol. It may present a fire risk
under certain conditions.
WARNING CALIFORNIA PROPOSITION 65
WARNING
Engine exhaust and a wide vari-
ety of automobile components
and parts, including compo-
nents found in the interior fur-
nishings in a vehicle, contain or
emit chemicals known to the
State of California to cause can-
cer and birth defects and repro-
ductive harm. In addition, cer-
tain fluids contained in vehicles
and certain products of compo-
nent wear contain or emit chem-
icals known to the State of
California to cause cancer and
birth defects or other reproduc-
tive harm.
WARNING

I-4
Driver assist system ......................................................3-119Rear parking assist system .......................................3-120
Rear parking assist system precautions....................3-123
Rear view camera .....................................................3-119
Driver attention alert system (DAA) ..............................5-63 Resetting the system ...................................................5-65
System malfunction ....................................................5-65
System setting and activation .....................................5-63
System standby...........................................................5-65
Driver position memory system .....................................3-14 Easy Access Function .................................................3-15
Storing Positions into Memory ..................................3-14
Driving the Hybrid/Plug-in Hybrid Vehicle ....................H22 Changing plug-in hybrid mode ...................................H26
Energy flow.................................................................H38
Hybrid system gauge ..................................................H24
Special features ...........................................................H23
Starting the vehicle .....................................................H22
Warning and indicator lights.......................................H27
Warning messages.......................................................H28 Emission control system .................................................7-84
Crankcase emission control system ...........................7-84
Evaporative emission control system including onboard refueling vapor recovery (ORVR) ............7-84
Exhaust emission control system ...............................7-85
Engine ........................................................................\
.......8-2
Engine compartment..................................................1-6, 7-3
Engine coolant/inverter coolant ......................................7-19 Changing engine coolant ............................................7-22
Checking the engine/inverter coolant level................7-19
Engine number ..................................................................8-9
Engine oil ........................................................................\
7-17 Checking the engine oil and filter ..............................7-18
Checking the engine oil level .....................................7-17
Engine Start/Stop button ...................................................5-5 Engine Stop/Start button positions ...............................5-7
Illuminated Engine Start/Stop button ...........................5-6
Starting the hybrid system............................................5-9
Explanation of scheduled maintenance items.................7-14
Exterior features..............................................................3-46 Fuel Filler Door (Hybrid) ...........................................3-53
Fuel Filler Door (Plug-in hybrid) ...............................3-56
Hood ........................................................................\
...3-46
Smart Trunk ................................................................3-50
Trunk ........................................................................\
..3-47
Index
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I-6
Interior features .............................................................3-144Clock ........................................................................\
3-149
Clothes Hanger .........................................................3-149
Cup Holder ...............................................................3-146
Floor Mat Anchor(s) .................................................3-150
Luggage Net Holder .................................................3-152
Power Outlet.............................................................3-147
Rear Cutrain .............................................................3-151
Side Curtain ..............................................................3-152
Sunvisor ....................................................................3-14\
7
Wireless Cellular Phone Charging System ..............3-144
Interior overview...............................................................1-4
Jump starting .....................................................................6-4\
Lane Keeping Assist System (LKAS) ............................5-53 Limitations of the System ..........................................5-61
LKAS function change ...............................................5-60
LKAS malfunction .....................................................5-58
LKAS operation .........................................................5-54
LCD Display ...................................................................3-91 LCD display control ...................................................3-91 Light ........................................................................\
......3-104
Exterior Lights..........................................................3-104
Interior Lights ...........................................................3-113
Smart High Beam .....................................................3-106
Welcome System ......................................................3-112
Light bulbs ......................................................................7-\
67 Headlamp, parking lamp, turn signal lamp and side marker light bulb replacement.........................7-68
High mounted stop lamp ............................................7-74
Interior light bulb replacement ...................................7-74
License plate light bulb replacement .........................7-74
Rear combination light bulb replacement ..................7-72
Side repeater lamp replacement .................................7-71
Maintenance services ........................................................7-4 Owner maintenance precautions ..................................7-4
Owner's responsibility ..................................................7-4
Malfunction Indicator .....................................................6-12 Changing a Tire with TPMS ......................................6-13
Mirrors ........................................................................\
....3-19 Inside Rearview Mirror ..............................................3-19
Reverse Parking Aid Function ...................................3-37
Side View Mirrors ......................................................3-34
Index
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Hybrid Vehicle H
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The HYUNDAI Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the electric motor for power. The elec-
tric motor is run by a high-voltage HEV battery.
Depending on the driving conditions, the HEV computer selectively operates between the engine and the electric motor
or even both at the same time.
Fuel efficiency increases when the engine is off at idle, or when the vehicle is driven by the electric motor with the HEV
battery.
The HEV battery charge must be maintained, so at times the engine will come on even at idle to act as a generator.
Charging also occurs when decelerating or by regenerative braking.
OLFH054001
Startup/Low speed cruise
Electric motor
Acceleration
Electric motor + Engine
High speed cruise
Engine
Deceleration
Charging
Stop
Engine OFF

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5. Remove any dust on the charging
connector and charging inlet.
6. Hold the charging connector han- dle. Then, insert it into the charg-
ing inlet, until you hear a click
sound. If it is not fully connected, a
bad connection between the
charging connector and the charg-
ing terminals may cause a fire. 7. Check if the charging cable con-
nection indicator of the high volt-
age battery in the instrument clus-
ter is turned ON.
Charging does not occur when the
indicator is OFF. When the charg-
ing connector is not connected
properly, reconnect the charging
cable to charge.
Information
• The charging is in progress only with the shift lever is in P (Park).
Charging the battery with the
Engine Start/Stop button in the
ACC position is possible. However,
it may discharge the 12-V battery.
Thus, if possible, charge the battery
with the Engine Start/Stop button in
the OFF position.
• Moving the shift lever from P (Park) to R (Reverse)/N(Neutral)/D (Drive)
stops the charging process.
To restart the charging process,
move the shift lever to P (Park),
press the Engine Start/Stop button
to the OFF position, and disconnect
the charging cable. Then, connect
the charging cable.
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