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 SXFACTORY OEM SERVICE PROCEDURE
Connector [B]
| Terminal | Description | Connected to |
|---|---|---|
| 1 | ECM ground | Chassis ground |
| 2 | ECM ground | Chassis ground |
| 3 | Battery power (B+) | Main relay |
| 4 | ECM ground | Chassis ground |
| 5 | Battery power (B+) | Main relay |
| 6 | Battery power (B+) | Main relay |
| 7 | - | |
| 8 | FlexRay communication [High] signal input | Other control module, Data Link connector (DLC), Multi-purpose check connector |
| 9 | - | |
| 10 | Brake switch [Test] signal input | Brake switch |
| 11 | - | |
| 12 | - | |
| 13 | Electric load signal input | Wiper motor |
| 14 | Immobilizer communication line | Smart Key Control module [With Smart Key] |
| Immobilizer Control module [Without Smart Key] | ||
| 15 | - | |
| 16 | Main relay control output | Main relay |
| 17 | - | |
| 18 | Purge Control Solenoid Valve (PCSV) control output | Purge Control Solenoid Valve (PCSV) |
| 19 | E-CVVT Relay control output | E-CVVT Relay |
| 20 | - | |
| 21 | - | |
| 22 | Injector (Cylinder #2) [High] control output | Injector (Cylinder #2) |
| 23 | Injector (Cylinder #2) [Low] control output | Injector (Cylinder #2) |
| 24 | - | |
| 25 | FlexRay communication [Low] signal input | Other control module, Data Link connector (DLC), Multi-purpose check connector |
| 26 | - | |
| 27 | Brake switch [Lamp] signal input | Brake switch |
| 28 | - | |
| 29 | - | |
| 30 | A/C Pressure Transducer (APT) signal input | A/C Pressure Transducer (APT) |
| 31 | Fuel Tank Pressure Sensor (FTPS) signal input | Fuel Tank Pressure Sensor (FTPS) |
| 32 | LIN communication signal input | Battery Sensor |
| 33 | Fuel pump relay control output | Fuel pump relay |
| 34 | Start control output | Start |
| 35 | Cooling fan relay [High] control output | Cooling fan relay [High] |
| 36 | - | |
| 37 | - | |
| 38 | Canister Close Valve (CCV) control output | Canister Close Valve (CCV) |
| 39 | Injector (Cylinder #3) [High] control output | Injector (Cylinder #3) |
| 40 | Injector (Cylinder #3) [Low] control output | Injector (Cylinder #3) |
| 41 | Battery power (B+) | Ignition switch |
| 42 | - | |
| 43 | - | |
| 44 | Sensor ground | Heated Oxygen Sensor [Bank 1/Sensor 2] |
| 45 | - | |
| 46 | Sensor ground | Accelerator Position Sensor (APS) 2 |
| 47 | Sensor ground | Accelerator Position Sensor (APS) 1 |
| 48 | Sensor ground | Fuel Tank Pressure Sensor (FTPS) |
| 49 | - | |
| 50 | Sensor ground | A/C Pressure Transducer (APT) |
| 51 | - | |
| 52 | - | |
| 53 | - | |
| 54 | Engine speed signal output | Smart Key Control module |
| 55 | - | |
| 56 | Injector (Cylinder #4) [High] control output | Injector (Cylinder #4) |
| 57 | Injector (Cylinder #4) [Low] control output | Injector (Cylinder #4) |
| 58 | Heated Oxygen Sensor [Bank 1/Sensor 2] signal input | Heated Oxygen Sensor [Bank 1/Sensor 2] |
| 59 | - | |
| 60 | C-CAN [Low] | Other control module, Data Link connector (DLC), Multi-purpose check connector |
| 61 | Start signal input | Starter |
| 62 | - | |
| 63 | - | |
| 64 | Accelerator Position Sensor (APS) 2 signal input | Accelerator Position Sensor (APS) 2 |
| 65 | Accelerator Position Sensor (APS) 1 signal input | Accelerator Position Sensor (APS) 1 |
| 66 | - | |
| 67 | - | |
| 68 | - | |
| 69 | - | |
| 70 | - | |
| 71 | Cooling fan relay [Low] control output | Cooling fan relay [High] |
| 72 | - | |
| 73 | Injector (Cylinder #1) [High] control output | Injector (Cylinder #1) |
| 74 | Injector (Cylinder #1) [Low] control output | Injector (Cylinder #1) |
| 75 | Battery power (B+) | Battery |
| 76 | - | |
| 77 | C-CAN [High] | Other control module, Data Link connector (DLC), Multi-purpose check connector |
| 78 | Vehicle speed signal input | ABS/ESC control module [With ABS/VDC] |
| 79 | Sensor power (+5V) | Fuel Tank Pressure Sensor (FTPS) |
| A/C Pressure Transducer (APT) | ||
| 80 | - | |
| 81 | Sensor power (+5V) | Accelerator Position Sensor (APS) 1 |
| 82 | Sensor power (+5V) | Accelerator Position Sensor (APS) 2 |
| 83 | - | |
| 84 | Fuel Level Sender (FLS) signal input | Fuel Level Sender |
| 85 | - | |
| 86 | CVVT Oil Control Valve (OCV) [Bank 1/Intake] control output | CVVT Oil Control Valve (OCV) [Bank 1/Intake] |
| 87 | - | |
| 88 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
| 89 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] |
| 90 | Fuel Pressure Regulator Valve [Low] control output | Fuel Pressure Regulator Valve |
| 91 | Fuel Pressure Regulator Valve [High] control output | Fuel Pressure Regulator Valve |
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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