Kia Optima 4th generation was produced in 2015, 2016, 2017, 2018, 2019, 2020, 2021. During this time, the car has undergone restyling. In this publication you will find a description of the fuses and relays of the Kia Optima 4th generation with block diagrams, photos and locations. We will show the cigarette lighter fuse. And finally, we will offer a complete repair and maintenance manual for download.
The purpose of the fuses and relays in the units of your Kia Optima 4 may differ from the one presented and depends on the year of manufacture, equipment level and region of delivery. Check the designations with your diagrams on the back of the protective cover.
Cabin block
Located on the instrument panel, on the driver’s side, behind a protective cover.
Scheme
Description
| Module 7 | 10A Surround view unit, front seat ventilation control module, front seat heating control module, rear seat heating control module |
| Module 5 | 10A Air conditioning control unit, electrochromatic mirror, anti-shock stripe switch, left/right headlight, automatic headlight range adjustment module, audio/video and navigation main unit, trunk lid fuel filler flap opening lever, gearshift lever indicator, driver IMS module, driver IMS module, oil level sensor (D4FD), DC-DC converter (amplifier)/(audio), front passenger compartment air ventilation control module, front seat heating with rear seat heaters |
| Module 6 | 10A BCM, smart key control module |
| CONDI-ER | 10A Air Conditioning Control Module, E/R Connector Panel (RLY. 3 – Fan Relay), Ionizer, Diesel Engine Connector Panel (RLY. 3/4 – Heater Relay with Positive TCS No. 2/3) |
| “START” | 10A [without smart key and IMMO.] ICM relay unit (security relay) [with smart key / IMMO. — A/T, DCT] PCM transmission range switch (G4KH/G4KE) [with smart key / IMMO. — M/T] PCM/ECM (G4ND/D4FD), Smart key control module, E/R connector board (RLY. 5 – start relay) |
| AIRBAG | 15A SRS control module |
| Module 3 | 10A BCM, automatic transmission lever position, brake light switch, DBL module, keypad, air conditioning control module |
| Module 4 | 10A Console switch, left/right blind spot collision warning radar, ECS module, parking assist control module, intelligent cruise control module, FCA forward collision avoidance module, lane keeping module, traction sensor |
| Interior lamp | 10A Interior lights and luggage compartment light |
| ELECTRIC POWER STEERING | 7.5A MDPS module (column/pillar), steering wheel angle sensor |
| IG1 | 25A Powertrain Unit (fuse – GLOW, TCU2, ABS3, VACUUM PUMP2, ECU3) |
| Module 9 | 10A Immobilizer module, smart key control module |
| WASHER | 15A Multi-function switch (wiper slow-down switch and windshield washer) |
| Module 8 | 10A Air Conditioning Control Module, Driver/Passenger Door Module |
| CLUSTER | Instrument cluster (IG1) |
| MULTI-A | 15A Head unit audio, audio/video and navigation, low voltage DC to DC converter (audio) |
| HTD STRG | 15A BCM (Heated Steering Wheel) |
| Module 1 | 10A Console switch, key solenoid, driver/passenger door module |
| DOOR LOCKING | 20A Door lock relay, door unlock relay, ICM relay block (interlock relay) |
| MEMORY 2 | 10A Horn Control Module, Ultrasonic Intrusion Sensor |
| INT. KEY | 15A Smart Key Control Module |
| IND. PILLOW WITHOUT THICKNESS | 10A Instrument cluster (airbag indicator power supply) |
| TRUNK | Trunk lid relay, fuel filler flap and trunk lid opener switch, trunk lid opener motor, ICM relay unit (fuel filler flap opener relay) |
| ROOF HATCH 2 | 20A Sunroof control module (roller) |
| MEMORY 1 | 10A Instrument cluster, A/C control module, diagnostic connector, BCM, wireless charging, driver IMS module, rain sensor, ICM relay block (outside mirror folding/unfolding relay), security indicator, automatic light sensor and photo sensor, driver/passenger door module |
| OPPOSITE. HEADLIGHT, REAR. | 10A ICM relay block (rear fog lamp relay) |
| HEATED SEATS, REAR | 25A Rear seat heater control module |
| ROOF HATCH 1 | 20A Sunroof control module (glass) |
| HEATED SEATS, CONDUCTED | 25A Front seat ventilation control module, front seat heater control module |
| ECS SYSTEM | 15A ECS Module |
| MODULE 2 | 10A Audio, AV and Navigation Head Unit, Keyboard, Surround View Unit, Amplifier, DC-DC Converter (Amplifier), DC-DC Converter (Audio), Electric Outside Mirror Switch, BCM Body Control Module, Wireless Charger, Rear USB Charger, MTS Emergency Call Module, E/R Junction Box (RLY. 7 – Socket Relay) |
| PR. EL. SCLOPID. | Right power window relay, rear left power window module, rear left power window switch, power window master switch, [LHD] passenger door power window fuse module [RHD] driver door power window fuse module |
| P/SEAT PASS | 25A Passenger seat manual switch, input relay module, passenger seat backrest limit switch |
| ZUSIL. | 25A Amplifier (JBL/MOBIS), DC to DC converter (amplifier) |
| BRAKE SWITCH | 10A Brake light switch, immobilizer module, smart key control module, start/stop button switch |
| P/WDW LH | 25A Left power window relay, rear right power window module, rear right power window switch, power window master switch, [LHD] driver’s door power window fuse module [RHD] passenger door power window fuse module |
| P/SEAT DRV | 30A Driver’s seat manual switch, driver’s IMS module |
| POWER OUTLET | 20A Cigarette Lighter, Sockets |
The fuses responsible for cigarette lighters and USB sockets are marked POWER OUTLET.
Blocks under the hood
Main unit
Located in the left side of the engine compartment.
Example of a scheme
Marking
Transcript
| MDPS1 | 80A MDPS Block (Column Type) |
| COOLING FAN 2 | 60A [G4KH / G4FJ] Cooling fan relay 1, cooling fan relay 2 |
| COOLING FAN 1 | 50A [G4KJ] Cooling fan relay 1 |
| B+ 3 | 50A Intelligent Connector Panel (IPS 2 (IPS 5), IPS 3 (IPS 6), IPS 7, IPS 8) |
| REAR HEATED | 50A Rear heated relay |
| DCT1 | 40А [G4FJ-DCT] TCM |
| BLOWER | 40A Supercharger relay |
| POWER OUTLET 1 | 40A Power Socket Relay |
| IG2 | 30A [W/O Smart Key] Start Relay, Ignition Switch, [With Smart Key] Start Relay, PCB Assembly (IG2 Relay) |
| MDPS 2 | 100A MDPS Unit (Rack) |
| B+1 | 60A Intelligent Junction Box (Fuse – SUNROOF1, SUNROOF2, S/HEATER RR, P/SEAT DRV, P/SEAT PASS, P/WINDOW LH, P/WINDOW RH, TRUNK) |
| B+5 | 60A Printed circuit board (engine control relay, fuse – TCU1, ECU2, FUEL PUMP, HORN, WIPER1) |
| B+2 | 60A Intelligent Distribution Unit (IPS 1, IPS 4, Fuse – AMP, S/HEATER FRT) |
| ABS1 | 40A ESC system control module |
| IG1 | 40A Ignition Switch [W/O Smart Key], [With Smart Key] PCB (IG1/ACC Relay) |
| DCT 2 | 40А [G4FJ-DCT] TCM |
| ABS 2 | 30A ESC system control module, universal diagnostic connector |
| B+4 | 40A Intelligent Distribution Unit (Ground Fault Circuit Interrupter Fuse – INTERIOR LAMP, MEMORY 1, MULTIMEDIA, Fuse – DOOR LOCK, MODULE 1, SMART KEY, BRAKE SWITCH) |
| E-CVVT 1 | 40A E-CVVT Relay |
| VACUUM PUMP 1 | 20A Vacuum pump |
| DEATH | 20A RLY. 10 (relay vs. combiner) |
| AMS | 10A Battery charge sensor |
| E-CVVT 2 | 20A PCM |
| A/CON | 10A Air Conditioning Control Module |
| E-CVVT 3 | 20A PCM |
| HEATED MIRROR | 10A Air conditioning control module, driver/passenger power exterior mirror |
| WIPER 2 | 10А BCM, PCM/ECM |
| H/LAMP HI | 20A High beam headlight (relay) |
| FUEL PUMP | 20A Fuel pump relay |
| ECU 1 | 20А PCM/ECM |
| SENSORS 2 | 10A E/R Junction Box (Fuel Pump Relay, Cooling Fan Relay 1/2), [G4KJ] Oil Control Valve (Exhaust), Purge Control Solenoid Valve, Variable Air Flow Solenoid Valve, CanisterClose Valve |
| TCU 2 | 15A Gear shift switch, TCM |
| ABS 3 | 10A ESC module, multi-purpose control connector |
| POWER OUTLET 3 | 20A Rear socket |
| B/UP LAMP | 10A PCM/TCM, Gear Shift, Audio, Electrochromic Mirror, Rear Combination Lamp (IN) LH/RH |
| SENSOR 1 | 15A Oxygen sensor (up/down) |
| IGN COIL | 20A Ignition coil #1/#2/#3/#4 |
| ECU 2 | 10А PCM/ECM |
| TCU 1 | 10А PCM/TCM |
| VACUUM PUMP 2 | 10A Vacuum pump, vacuum switch |
| ECU 2 | 10А PCM/ECM |
| POWER OUTLET 2 | 20A Front socket #1 |
| HORN | 20A Signal Relay, ICM Relay (Intrusion Alarm Relay) |
| WIPER 1 | 30A Slag cleaner relay |
Additional unit
Installed on vehicles with diesel engines.
Scheme
Appointment
- 80A – Glow plugs (Glow relay unit)
- 40A – Fuel filter heater (relay)
- PTC HEATER – additional heater
Main fuse
The main fuse is located on the positive terminal of the battery and is made in the form of a high-power fuse link.
