ECU KIA OPTIMA PLUG-IN HYBRID 2017 Service Manual

BATTERY
For best battery service
• Keep the battery securely mounted.
• Keep the battery top clean and dry.
• Keep the terminals and connectionsclean, tight, and coated with petrole‐
um jelly or terminal grease.
• Rinse any spilled electrolyte from the battery immediately with a solution
of water and baking soda.
• If the vehicle is not going to be used for an extended time, disconnect the
battery cables.
NOTICE
Basically equipped battery is main‐
tenance free type. If your vehicle is
equipped with the battery marked
with LOWER and UPPER on the side,
you can check the electrolyte level.
The electrolyte level should be be‐
tween LOWER and UPPER. If the
electrolyte level is low, it needs to
add distilled (demineralized) water
(Never add sulfuric acid or other
electrolyte). When refill, be careful
not to splash the battery and adja‐
cent components. And do not overfill
the battery cells. It can cause corro‐
sion on other parts. After then en‐
sure that tighten the cell caps. We
recommend that you contact an au‐
thorized Kia dealer.
WARNING
nBattery dangers
(Continued)
(Continued)
Always read the followinginstructions carefully whenhandling a battery.
Keep lighted cigarettes andall other flames or sparksaway from the battery.
Hydrogen, a highly com‐bustible gas, is alwayspresent in battery cells andmay explode if ignited.
Keep batteries out of thereach of children becausebatteries contain highlycorrosive SULFURIC ACID.Do not allow battery acidto contact your skin, eyes,clothing or paint finish.
(Continued)

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9
Maintenance

If it fits loosely, we recommend that
you consult an authorized Kia dealer.
If you do not have a spare, use a fuse of the same rating from a circuit you
may not need for operating the vehicle,
such as the cigarette lighter fuse.
If the headlights or taillights, stop lights, courtesy lamp, day time running
lights (D.R.L) do not work and the fuses
are OK, check the fuse panel in the en‐ gine compartment. If a fuse is blown, it
must be replaced.
Fuse switch
0+'
Always, put the fuse switch at the ON
position. If you move the switch to the OFF posi‐
tion, some items such as audio and dig‐
ital clock must be reset and transmitter
(or smart key) may not work properly.
If the fuse switch is in OFF, a warning sign will illuminate on the dashboard.
CAUTION
•Put all switches in ON when driv‐ing.
•If the vehicle remains idle for over1 month, put all switches in OFF toprevent the batteries from beingdischarged.
•Excluding long-term parking forover 1 month, the contact pointsof switches may wear out uponextensive use. Please refrain fromexcessive use of switches.
Engine compartment fuse
replacement
1. Turn the ignition switch and all oth‐ er switches off.
2. Remove the fuse panel cover by pressing the tab and pulling the
cover up. When the blade type fuse
is disconnected, remove it by using
the clip designed for changing fuses
located in the engine room fuse
box. Upon removal, securely insert
reserve fuse of equal quantity.
3. Check the removed fuse; replace it if it is blown. To remove or insert
the fuse, use the fuse puller in the
engine compartment fuse panel.
Maintenance
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4. Push in a new fuse of the samerating, and make sure it fits tightly
in the clips. If it fits loosely, we rec‐
ommend that you consult an au‐
thorized Kia dealer.
CAUTION
After checking the fuse panel in theengine compartment, securely installthe fuse panel. If not, cover throughthe audible clicking sound. Electricalfailures may occur from water con‐tact.
Multi fuse
If the multi fuse is blown, it must be re‐
moved as follows: 1. Disconnect the negative battery cable.
2. Remove the nuts shown in the pic‐ ture above.
3. Replace the fuse with a new one of the same rating.
4. Reinstall in the reverse order of re‐ moval.
NOTICE
If the multi fuse is blown, we recom‐
mend that you consult an author‐
ized Kia dealer.
Main fuse
If the main fuse is blown, it must be re‐
moved as follows: 1. Turn off the engine.
2. Disconnect the negative battery cable.
3. Remove the nuts shown in the pic‐ ture above.

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9
Maintenance

4. Replace the fuse with a new one ofthe same rating.
5. Reinstall in the reverse order of re‐ moval.
NOTICE
The electronic system may not
function correctly even when the
engine room and internal fuse box's
individual fuses are not disconnec‐
ted. In such case the cause of the
problem may be disconnection of
the main fuse (BFT type), which is
located inside the positive battery
terminal (+) cap. Since the main fuse
is designed more intricately than
other parts, please visit the nearest
Kia dealer and service center.
CAUTION
Visually inspect the battery cap forsecure closing. If the battery cap isnot securely latched, the electricalsystem may be damaged to due in‐flux of moisture into the system.
Fuse/relay panel description
%SJWFSLÓT
TJEF
GVTF
QBOFM
0+'
&OHJOF
DPNQBSUNFOU
GVTF
QBOFM
#BUUFSZ
UFSNJOBM
DPWFS
Inside the fuse/relay panel covers, you
can find the fuse/relay label describing fuse/relay name and capacity.
NOTICE
Not all fuse panel descriptions in this
manual may be applicable to your
vehicle. It is accurate at the time of
printing. When you inspect the fuse
panel in your vehicle, refer to the
fuse panel label.
Maintenance
9-56

Fuse NameSymbolFuse rat‐ingCircuit Protected
IG1
25A PCB Block (Fuse - OPCU2/ELECTRICAL WATER PUMP/TCU2/ACTIVE HYDRAULIC
BOOTER 3/HEV ECU2/ECU3)
MODULE 9
10A Smart Key Control Module
WASHER
15A Multifunction Switch (Wiper Low & Washer Switch)
MODULE 8
10A Driver/Passenger Door Module
CLUSTER
10A Instrument Cluster
MULTI MEDIA
15A Audio, A/V & Navigation Head Unit, Keyboard
HTD STRG
15A BCM (Steering Wheel Heated)
MODULE 1
10A Console Switch, Active Air Flap Unit, Gateway, Driver/Passenger Door Module
DR LOCK
20A Door Lock Relay, Door Unlock Relay, ICM Relay Box (Dead Lock Relay)
MEMORY 2
10A Siren Control Module, Ultrasonic Intrusion Protection Sensor
SMART KEY
15A Smart Key Control Module
A/BAG IND
10A Instrument Cluster (Air Bag IND. Power)
TRUNK
10A Trunk Lid Relay, Fuel Filler & Trunk Open Switch, ICM Relay Box (Fuel Filler Open Relay)
SUNROOF 2
20A Sunroof Control Unit (Roller)
BATTERY MANAGE‐ MENT
BATTERY
MANAGEMENT20A BMS Control Module
MEMORY 1
10A Instrument Cluster, A/C Control Module, Data Link Connector, BCM, Wireless
Charger, Driver IMS Module, Rain Sensor, ICM Relay Box (Outside Mirror Fold‐
ing/Unfolding Mirror Relay), Security Indicator, Auto Light & Photo Sensor,
Driver/Passenger Door Module


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9
Maintenance

Engine room compartment fuse panel
Fuse NameSymbolFuse ratingCircuit Protected
MULTI FUSE MDPS 1
80A MDPS Unit (Column)
COOLING FAN
60A RLY. 2 (Cooling Fan Relay)
B+5
50A PCB Block (Engine Control Relay, Fuse -FUEL
PUMP/ECU2/TCU1/HORN/WIPER1/BATTERY C/FAN)
B+3
50A Smart Junction Block (IPS 2 (IPS 5), IPS 3 (IPS 6), IPS 7, IPS 8)
REAR HEATED
50A RLY. 11 (Rear Heated Relay)
ACTIVE HYDRAULIC BOOSTER 2
2ACTIVE
HYDRAULIC BOOSTER40A Integrated Brake Actuation Unit
BLOWER
40A RLY. 4 (Blower Relay)
POWER OUTLET1
40A RLY. 7 (Power Outlet Relay)
IG2
30A PCB Block (IG2 Relay)
B+1
60A Smart Junction Block (Fuse - TRUNK, SUNROOF2, S/HEATER
REAR, SUNROOF1, P/WDW RH, P/SEAT PASS, P/WDW LH, P/SEAT
DRV)
EEWP
EEWP60A Engine Electric Water Pump
B+2
60A Smart Junction Block (IPS 1, IPS 4, Fuse - FOG LAMP REAR, S/
HEATER FRONT, AMP)
ACTIVE HYDRAULIC BOOSTER 1
ACTIVE
HYDRAULIC
BOOSTER140A Integrated Brake Actuation Unit
IG1
40A PCB Block (IG1/ACC Relay)

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Maintenance

Fuse NameSymbolFuse ratingCircuit Protected
FUSE EPB1
130A Electric Parking Brake Module
H/Lamp Washer
30A RLY. 9 (H/Lamp Washer Relay)
B+4
40A Smart Junction Block (Leak Current Autocut Device Fuse - INTERI‐
OR LAMP, MULTI MEDIA, MEMORY2, MEMORY1, Fuse - MODULE1,
DR LOCK, SMART KEY, BRAKE SWITCH)
EPB 2
230A Electric Parking Brake Module
OPCU 1
OPCU120A Electric Oil Pump Unit
DEICER
20A RLY. 10 (Deicer Relay)
AMS
10A Battery Sensor
HEATED MIRROR
10A A/C Control Module, Driver/Passenger Power Outside Mirror
WIPER 2
210A BCM, PCM
H/LAMP HI
20A Not used
HEV ECU 1
HEV
ECU110A HPCU
OPCU2
OPCU110A Electric Oil Pump Unit
ELECTRICAL WATER PUMP
ELECTRICALWATERPUMP10A Electric Water Pump (HEV)
FUEL PUMP
20A Fuel Pump Relay
Maintenance
9-66

Fuse NameSymbolFuse ratingCircuit Protected
FUSE ECU 1
20A PCM
SENSORS 2
10A Mass Air Flow Sensor, Fuel Pump Relay, Oil Control Valve #1/#2,
Canister Close Valve, Camshaft Position Sensor #1/#2, Purge Con‐
trol Solenoid Valve
TCU 2
15A Transaxle Range Switch
ACTIVE HYDRAULIC BOOSTER 3
310A Multipurpose Check Connector, Integrated Brake Actuation Unit
POWER OUTLET 3
20A Rear Power Outlet
B/UP LAMP
10A PCM, Transaxle Range Switch, Electro Chromic Mirror, Rear Com‐ bination Lamp (IN) LH/RH
PTC HEATER 1
50A PTC HEATER
PTC HEATER 2
50A PTC HEATER
IG3 1
IG3110A HYBRID WATER PUMP
IG3 2
IG3215A PCU/HPCU/POSITION SWITCH
IG3 3
IG3310A HYBRID OBC SIG
IG3 4
IG320A IG3 3 RELAY
SENSOR 1
15A Oxygen Sensor (Up/Down), E/R Junction Block (Cooling Fan Relay)

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9
Maintenance

Fuse NameSymbolFuse ratingCircuit Protected
FUSE IGN COIL
20A Ignition Coil #1/#2/#3/#4
ECU 2
10A PCM
TCU 1
10A PCM
HEV ECU 2
HEV
ECU
210A HPCU, E/R Junction Block (Battery C/Fan Relay)
ECU 3
10A PCM
POWER OUTLET2
20A Front Power Outlet #1
HORN
20A Horn Relay, ICM Relay Box (Burglar Alarm Horn Relay)
WIPER 1
130A Wiper Power Relay
BATTERY C/FAN
BATTERY C/FAN15A E/R Junction Block (Battery C/Fan Relay)
Relay
SymbolRelay NameType
COOLING FAN Relay MINI
BLOWER RelayMICRO
BATTERY
C/FANBATTERY C/FAN Relay MICRO
POWER OUTLET Relay MICRO
H/LAMP WASHER Relay MICRO
DEICER RelayMICRO
Maintenance
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