cooling KIA OPTIMA PHEV 2018 User Guide

821
Maintenance
Air cleaner filter
A Genuine Kia 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 the cooling system compo-
nents, such as the radiator, coolant
reservoir, hoses and connections for
leakage and damage. Replace any
damaged parts.
Coolant (Engine / Inverter)
The coolant should be changed at
the intervals specified in the mainte-
nance schedule.
Automatic transaxle fluid
Automatic transaxle fluid should not
be checked under normal usage
conditions.
But in severe conditions, the fluid
should be changed at an authorized
Kia dealer in accordance to the
scheduled maintenance at the begin-
ning of this chapter.
✽ ✽NOTICE
Automatic transaxle fluid color is
basically red.
As the vehicle is driven, the auto-
matic transaxle fluid will begin to
look darker.
It is normal condition and you should
not judge the need to replace the fluid
based upon the changed color.
Brake hoses and lines
Visually check for proper installation,
chafing, cracks, deterioration and
any leakage. Replace any deteriorat-
ed or damaged parts immediately.
CAUTION
Use only specified automatic
transaxle fluid. The use of a non-specified fluid could result in atransaxle malfunction and fail-ure. (Refer to "Recommendedlubricants and capacities" inchapter 9.)

827
Maintenance
COOLANT
The high-pressure cooling system
has a reservoir filled with year round
antifreeze coolant. The reservoir is
filled at the factory.
Check the antifreeze protection and
coolant level at least once a year: at
the beginning of the winter season,
and before traveling to a colder cli-
mate.Checking the coolant level Turn the engine off and wait until itcools down. Use extreme care
when removing the radiator cap.
Wrap a thick towel around it, and
turn it counterclockwise slowly to
the first stop. Step back while the
pressure is released from the cool-
ing system.
When you are sure all the pressure
has been released, press down on
the cap, using a thick towel, and
continue turning counterclockwise
to remove it.
Even if the engine is not operating, do not remove the radiator cap or
the drain plug while the engine and
radiator are hot. Hot coolant and
steam may still blow out under
pressure, causing serious injury.
The engine coolant and/or inverter
coolant level is influenced by the
hybrid system temperature. Before
checking or refilling the engine
coolant and/or inverter coolant,
turn the hybrid vehicle off.
WARNING
Removing radiator
cap
Never attempt to remove the
radiator cap while the engine is
operating or hot. Doing so
might lead to cooling system
and engine damage and could
result in serious personal injury
from escaping hot coolant or
steam.
CAUTION - Radiator cap
Never attempt to remove theradiator cap while the engine isoperating or hot. Doing somight lead to cooling systemand engine damage.

Maintenance
28
8
Engine coolant
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen
or deteriorated hoses.
The coolant level should be filled
between F and L marks on the side
of the coolant reservoir when the
engine is cool.
If the coolant level is low, add enough
specified coolant to provide protec-
tion against freezing and corrosion.
Bring the level to F, but do not over-
fill. If frequent additions are required,
see an authorized Kia dealer for a
cooling system inspection.
Inverter coolant
The coolant level should be filled
between MAX and MIN marks on the
side of the coolant reservoir when
the engine is cool.
If the coolant level is low, add enough
specified coolant to provide protec-
tion against freezing and corrosion.
Bring the level to MAX, but do not
overfill. If frequent additions are
required, see an authorized Kia deal-
er for a cooling system inspection.
OJF075006OJFH075186L
WARNING- Cooling fan
Use caution when
working near the
blade of the cooling
fan. The electric
motor (cooling fan) is
controlled by engine coolant
temperature, refrigerant pres-
sure and vehicle speed. it may
sometimes operate even when
the engine is not running.

873
Maintenance
Fuse NameFuse ratingCircuit Protected
MULTIFUSE
MDPS 180AMDPS Unit (Column)
COOLING FAN60ARLY. 2 (Cooling Fan Relay)
B+550APCB Block (Engine Control Relay, Fuse -FUEL PUMP/ECU2/TCU1/HORN/WIPER1/BATTERY
C/FAN)
B+350ASmart Junction Block (IPS 2 (IPS 5), IPS 3 (IPS 6), IPS 7, IPS 8)
REAR HEATED50ARLY. 11 (Rear Heated Relay)
ACTIVE
HYDRAULIC
BOOSTER 240AIntegrated Brake Actuation Unit
BLOWER40ARLY. 4 (Blower Relay)
POWER
OUTLET140ARLY. 7 (Power Outlet Relay)
IG230APCB Block (IG2 Relay)
Engine room compartment fuse panel

877
Maintenance
Fuse NameFuse ratingCircuit Protected
FUSE
SENSOR 115AOxygen Sensor (Up/Down), E/R Junction Block (Cooling Fan Relay)
IGN COIL20AIgnition Coil #1/#2/#3/#4
ECU 210APCM
TCU 110APCM
HEV ECU 210AHPCU, E/R Junction Block (Battery C/Fan Relay)
ECU 310APCM
POWER OUT-LET220AFront Power Outlet #1
HORN20AHorn Relay, ICM Relay Box (Burglar Alarm Horn Relay)
WIPER 130AWiper Power Relay
BATTERYC/FAN15AE/R Junction Block (Battery C/Fan Relay)

Maintenance
78
8
Relay NameType
COOLING FAN RelayMINI
BLOWER RelayMICRO
BATTERY C/FAN RelayMICRO
H/LAMP HI RelayMICRO
POWER OUTLET RelayMICRO
H/LAMP WASHER RelaMICRO
DEICER RelayMICRO
REAR HEATED RelayMINI
PTC HEATER 1MINI
PTC HEATER 2MINI
IG3 3MICRO
Relay

Index
4I
Center console storage . . . . . . . . . . . . . . . . . . . . . . . . 4-133
Central door lock switch. . . . . . . . . . . . . . . . . . . . . . . . 4-15
Chains - Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-96
Checking the amount of air conditionerrefrigerant and compressor lubricant . . . . . . . . . . . 4-127
Checking tire inflation pressure . . . . . . . . . . . . . . . . . . 8-46
Child restraint system . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32 Selecting a Child Restraint System (CRS) . . . . . . . 3-33
Installing a Child Restraint System (CRS) . . . . . . . 3-36
Securing a child restraint with the LATCHanchors system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
"Securing a child restraint seatwith" "Tether Anchor" "system" . . . . . . . . . . . . . . . . . . . 3-39
Child-protector rear door lock . . . . . . . . . . . . . . . . . . . 4-16
Clean air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-\
132
Climate control air filter . . . . . . . . . . . . . . . . . . . . . . . . 8-36 Filter inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-36
Checking the amount of air conditioner refrigerant and compressor lubricant . . . . . . . . . . . . . . . . . . . . . . 4-127
Closing the sunroof. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Clothes hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-140
Combined instrument, see instrument cluster . . . . . . . 4-51
consumer assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. 8-27
Coolant(Engine/Inverter) . . . . . . . . . . . . . . . . . . . . . . . 8-27 Checking the coolant level . . . . . . . . . . . . . . . . . . . . 8-27
Changing the coolant . . . . . . . . . . . . . . . . . . . . . . . . 8-30
Cooling fluid, see engine coolant . . . . . . . . . . . . . . . . . 8-27 Crankcase emission control system . . . . . . . . . . . . . . 8-102
Cruise control system . . . . . . . . . . . . . . . . . . . . . . . . . . 6-52
To set cruise control speed . . . . . . . . . . . . . . . . . . . . 6-53
To increase cruise control set speed . . . . . . . . . . . . . 6-53
To decrease the cruising speed . . . . . . . . . . . . . . . . . 6-54
To temporarily accelerate with the cruise control on . . 6-54
To cancel cruise control . . . . . . . . . . . . . . . . . . . . . . 6-54
To resume cruising speed at more than approximately 20mph (30 km/h) . . . . . . . . . . . . . . 6-55
To turn cruise control off . . . . . . . . . . . . . . . . . . . . . 6-55
Cup holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-135
Curtain air bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63
Dashboard illumination, see instrument panel illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
Dashboard, see instrument cluster . . . . . . . . . . . . . . . . 4-51
Day/night rearview mirror . . . . . . . . . . . . . . . . . . . . . . 4-46
Daytime running light . . . . . . . . . . . . . . . . . . . . . . . . 4-100
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . 5-8 FCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . 5-8
Defogging (Windshield) . . . . . . . . . . . . . . . . . . . . . . . 4-129
Defroster (Rear window) . . . . . . . . . . . . . . . . . . . . . . 4-114
Defrosting (Windshield) . . . . . . . . . . . . . . . . . . . . . . . 4-129
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-\
2
Disarmed stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
D

Index
6I
Engine start/stop button . . . . . . . . . . . . . . . . . . . . . . . . . 6-6Illuminated engine start/stop button. . . . . . . . . . . . . . 6-6
Engine start/stop button position . . . . . . . . . . . . . . . . 6-6
Starting the hybrid system . . . . . . . . . . . . . . . . . . . . . 6-8
Engine start/stop button illumination . . . . . . . . . . . . . . . 6-6
Engine start/stop button position . . . . . . . . . . . . . . . . . . 6-6
Engine will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Evaporative emission control (including ORVR: Onboard Refueling Vapor Recovery) system . . . . . 8-102
Exhaust emission control system . . . . . . . . . . . . . . . . 8-103
Explanation of scheduled maintenance items . . . . . . . 8-20 Engine oil and filter . . . . . . . . . . . . . . . . . . . . . . . . . 8-20
Hybrid starter & generator belt . . . . . . . . . . . . . . . . 8-20
Fuel filter (for gasoline) . . . . . . . . . . . . . . . . . . . . . . 8-20
Fuel lines, fuel hoses and connections . . . . . . . . . . . 8-20
Vapor hose and fuel filler cap . . . . . . . . . . . . . . . . . 8-20
Vacuum crankcase ventilation hoses . . . . . . . . . . . . 8-20
Air cleaner filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
Coolant (Engine / Inverter) . . . . . . . . . . . . . . . . . . . 8-21
Automatic transaxle fluid . . . . . . . . . . . . . . . . . . . . . 8-21
Brake hoses and lines . . . . . . . . . . . . . . . . . . . . . . . . 8-21
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
Parking brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22
Brake discs, pads, calipers and rotors . . . . . . . . . . . 8-22
Exhaust pipe and muffler . . . . . . . . . . . . . . . . . . . . . 8-23
Suspension mounting bolts . . . . . . . . . . . . . . . . . . . 8-23 Steering gear box, linkage & boots/
lower arm ball joint . . . . . . . . . . . . . . . . . . . . . . . . 8-23
Drive shafts and boots . . . . . . . . . . . . . . . . . . . . . . . 8-23
Air conditioning refrigerant . . . . . . . . . . . . . . . . . . . 8-23
Exterior care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-94
Exterior overview (Front) . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Exterior overview (Rear) . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Flat tires, see tire mobility kit. . . . . . . . . . . . . . . . . . . . 7-16
Floor mat anchor(s) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-140
Fluid Checking fluid levels . . . . . . . . . . . . . . . . . . . . . . . . 8-23
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-31
Washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-32
Folding the outside rearview mirror . . . . . . . . . . . . . . . 4-50
"Front passenger andrear seat 3-point system withcombination locking retractor" . . . . . . . . . . . . . 3-25
Front passenger's seat belt warning . . . . . . . . . . . . . . . 3-23
Front seat adjustment (manual) . . . . . . . . . . . . . . . . . . . 3-7
Front seat adjustment (power) . . . . . . . . . . . . . . . . . . . . 3-8
Front turn signal lamp bulb replacement . . . . . . . . . . . 8-85
Fuel filler lid (Hybrid) . . . . . . . . . . . . . . . . . . . . . . . . . 4-29 Emergency fuel filler lid release . . . . . . . . . . . . . . . 4-32
Fuel filler lid (Plug-in Hybrid) . . . . . . . . . . . . . . . . . . . 4-33 Emergency fuel filler lid release . . . . . . . . . . . . . . . 4-35
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55\
F