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.
2023 Kia Seltos Nightfall EditionFACTORY OEM SERVICE PROCEDURE
Terminal Function
CONNECTOR A DESCRIPTION
| Pin | Function |
|---|---|
| 1 | Ignition coil #4 control |
| 2 | Ignition coil #3 control |
| 3 | - |
| 4 | EWGA motor (+) |
| 5 | Injector #3 control (-) |
| 6 | - |
| 7 | Engine Coolant Temperature Sensor (ECTS) signal |
| 8 | - |
| 9 | Boost Pressure Sensor (BPS) signal |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | Throttle Position Sensor (TPS) 1 signal |
| 14 | Accelerator Position Sensor (APS) 1 signal |
| 15 | Differential Pressure Sensor (DPS) signal |
| 16 | Ignition coil #2 control |
| 17 | Ignition coil #1 control |
| 18 | ETC motor (+) |
| 19 | EWGA motor (-) |
| 20 | Injector #2 control |
| 21 | - |
| 22 | - |
| 23 | - |
| 24 | Camshaft Position Sensor (CMPS) signal - Exhaust |
| 25 | - |
| 26 | Vehicle speed signal |
| 27 | Start signal |
| 28 | Brake test switch |
| 29 | Brake light switch signal |
| 30 | - |
| 31 | Injector #2 control (+) |
| 32 | Injector #3 control (+) |
| 33 | - |
| 34 | Injector #1 control (+) |
| 35 | Fuel Pressure Control Valve (FPCV) (+) |
| 36 | Camshaft Position Sensor (CMPS) ground - Intake |
| 37 | Camshaft Position Sensor (CMPS) ground - Exhaust |
| 38 | Alternator (FR) |
| 39 | - |
| 40 | - |
| 41 | Heated Oxygen Sensor (HO2S) down signal |
| 42 | - |
| 43 | - |
| 44 | - |
| 45 | Electric load signal input [Defrost] |
| 46 | Injector #4 control (+) |
| 47 | Injector #1 control (+) |
| 48 | ETC motor (-) |
| 49 | Injector #4 control (-) |
| 50 | Fuel Pressure Control Valve (FPCV) (-) |
| 51 | - |
| 52 | - |
| 53 | Crankshaft Position Sensor (CKPS) ground |
| 54 | Crankshaft Position Sensor (CKPS) signal |
| 55 | - |
| 56 | Camshaft Position Sensor (CMPS) signal - Intake |
| 57 | Heated Oxygen Sensor (HO2S) downstream - Ground |
| 58 | - |
| 59 | - |
| 60 | - |
CONNECTOR B DESCRIPTION
| Pin | Function |
|---|---|
| 1 | Ground |
| 2 | Ground |
| 3 | Ground |
| 4 | Battery power (B+) |
| 5 | Engine control relay power |
| 6 | Engine control relay power |
| 7 | Battery power (B+) |
| 8 | Accelerator Position Sensor (APS) #1 ground |
| 9 | Manifold Absolute Pressure Sensor (MAPS) ground |
| 10 | Boost Pressure Sensor (BPS) ground |
| 11 | - |
| 12 | Electric Waste Gate Actuator (EWGA) position sensor ground |
| 13 | - |
| 14 | - |
| 15 | - |
| 16 | Engine Coolant Water Temperature Sensor (ECTS) ground |
| 17 | - |
| 18 | - |
| 19 | - |
| 20 | A/C relay control |
| 21 | - |
| 22 | CVVT Oil Control Valve (OCV) control - Intake |
| 23 | - |
| 24 | Cooling fan PWM control |
| 25 | - |
| 26 | - |
| 27 | Fuel pump relay control (With Immobilizer/Smart key) CVV control (Without Immobilizer/Smart key) |
| 28 | - |
| 29 | Ignition switch power |
| 30 | Accelerator Position Sensor (APS) #2 ground |
| 31 | Fuel Tank Pressure Sensor (FTPS) ground |
| 32 | - |
| 33 | - |
| 34 | - |
| 35 | Differential Pressure Sensor (DPS) ground |
| 36 | Rail Pressure Sensor (RPS) ground |
| 37 | A/C Pressure Transducer (APT) ground |
| 38 | - |
| 39 | Alternator COM signal |
| 40 | - |
| 41 | Start relay control |
| 42 | - |
| 43 | Accelerator Position Sensor (APS) #2 power |
| 44 | Camshaft Position Sensor (CMPS) power |
| 45 | - |
| 46 | - |
| 47 | - |
| 48 | - |
| 49 | - |
| 50 | CVVT Oil Control Valve (OCV) control - Exhaust |
| 51 | Main relay control |
| 52 | Throttle Position Sensor (TPS) ground |
| 53 | - |
| 54 | A/C Pressure Transducer (APT) signal |
| 55 | - |
| 56 | Intake Temperature Sensor (IATS) signal |
| 57 | Manifold Absolute Pressure Sensor (MAPS) signal |
| 58 | Knock Sensor (KS) ground |
| 59 | VS+ (NERNST Cell Voltage) |
| 60 | Rc (Compensative Resistance) |
| 61 | - |
| 62 | - |
| 63 | P-CAN [Low] |
| 64 | - |
| 65 | Differential Pressure Sensor (DPS) power |
| 66 | Accelerator Position Sensor (APS) #1 power |
| 67 | - |
| 68 | RCV control solenoid valve control |
| 69 | - |
| 70 | - |
| 71 | Fuel pump relay control output (Without Immobilizer/Smart key) |
| 72 | CVV control (Without Immobilizer/Smart key) |
| 73 | Fuel Tank Pressure Sensor (FTPS) signal |
| 74 | Throttle Position Sensor (TPS) #2 signal |
| 75 | - |
| 76 | Fuel Level Sensor (FLS) signal |
| 77 | Accelerator Position Sensor (APS) #2 signal |
| 78 | Rail Pressure Sensor (RPS) signal |
| 79 | Knock Sensor (KS) signal |
| 80 | VS-/IP- (Common Ground for VS, IP) |
| 81 | Rc/Rp (Pump Cell Voltage) |
| 82 | Engine speed signal |
| 83 | Immobilizer communication line |
| 84 | - |
| 85 | C-CAN [High] |
| 86 | Sensor (MAP, FTP, EWGA) power |
| 87 | Sensor (APT, RPS, BPS) power |
| 88 | Throttle Position Sensor (TPS) power |
| 89 | Heated Oxygen Sensor (HO2S) heater control - Front |
| 90 | - |
| 91 | Heated Oxygen Sensor (HO2S) heater control - Rear |
| 92 | - |
| 93 | - |
| 94 | Purge Control Solenoid Valve (PCSV) control |
Factory Service Tools
Use the Manual With the Right Hardware
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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.