Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2016 Kia Optima LX 1.6TFACTORY OEM SERVICE PROCEDURE
Connector [A]
| Pin No. | Description | Connected to |
|---|---|---|
| 1 | Injector (Cylinder #3) [High] control output | Injector (Cylinder #3) |
| 2 | Injector (Cylinder #4) [High] control output | Injector (Cylinder #4) |
| 3 | Injector (Cylinder #2) [Low] control output | Injector (Cylinder #2) |
| 4 | EWGA Motor Control (+) | Electric WGT Control Actuator |
| 5 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] heater control output | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
| 6 | Battery Sensor ground | Battery Sensor |
| 7 | - | |
| 8 | - | |
| 9 | EWGA Sensor Ground (-) | Electric Waste Gate Actuator (EWGA) |
| 10 | - | |
| 11 | - | |
| 12 | - | |
| 13 | - | |
| 14 | - | |
| 15 | CVVT Oil Control Valve (OCV) [Bank 1/Exhaust] control output | CVVT Oil Control Valve (OCV) [Bank 1/Exhaust] |
| 16 | Injector (Cylinder #2) [High] control output | Injector (Cylinder #2) |
| 17 | Injector (Cylinder #1) [High] control output | Injector (Cylinder #1) |
| 18 | Injector (Cylinder #3) [Low] control output | Injector (Cylinder #3) |
| 19 | EWGA Motor Control (-) | Electric Waste Gate Actuator (EWGA) |
| 20 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor2] heater control output | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] |
| 21 | - | |
| 22 | - | |
| 23 | Engine Coolant Temperature Sensor (ECTS) signal input | Engine Coolant Temperature Sensor (ECTS) |
| 24 | Sensor ground | Engine Coolant Temperature Sensor (ECTS) |
| 25 | - | |
| 26 | - | |
| 27 | Fuel pump relay control output (NON-Smart key type) | Fuel pump relay |
| 28 | - | |
| 29 | A/C compressor relay control output | A/C compressor relay |
| 30 | - | |
| 31 | Ignition coil (Cylinder #3) control output | Ignition coil (Cylinder #3) |
| 32 | Ignition coil (Cylinder #1) control output | Ignition coil (Cylinder #1) |
| 33 | Injector (Cylinder #1) [Low] control output | Injector (Cylinder #1) |
| 34 | Fuel Pressure Control Valve (FPCV) [High] control output | Fuel Pressure Control Valve (FPCV) |
| 35 | ETC motor [-] control output | ETC motor |
| 36 | - | |
| 37 | Knock Sensor (KS) signal input | Knock Sensor (KS) |
| 38 | Sensor ground | Knock Sensor (KS) |
| 39 | Blower Switch Max. Signal input | Heater control module |
| 40 | Brake Light switch signal input | Brake switch |
| 41 | - | |
| 42 | - | |
| 43 | - | |
| 44 | - | |
| 45 | CVVT Oil Control Valve (OCV) [Bank 1/Intake] control output | CVVT Oil Control Valve (OCV) [Bank 1/Intake] |
| 46 | Ignition coil (Cylinder #4) control output | Ignition coil (Cylinder #4) |
| 47 | Ignition coil (Cylinder #2) control output | Ignition coil (Cylinder #2) |
| 48 | Injector (Cylinder #4) [Low] control output | Injector (Cylinder #4) |
| 49 | Fuel Pressure Control Valve (FPCV) [Low] control output | Fuel Pressure Control Valve (FPCV) |
| 50 | ETC motor [+] control output | ETC motor |
| 51 | - | |
| 52 | EWGA sensor feed back signal input | Electric Waste Gate Actuator (EWGA) |
| 53 | Brake Test switch signal input | Brake switch |
| 54 | - | |
| 55 | Clutch switch signal input | Clutch switch |
| 56 | Electric load signal input [Defrost] | Alternator |
| 57 | Alternator COM signal output | Alternator |
| 58 | Engine speed signal output | Cluster |
| 59 | Cooling fan relay [PWM] control output | Cooling fan relay |
| 60 | - |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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