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.
2017 Hyundai Sonata Plug-In HybridFACTORY OEM SERVICE PROCEDURE
ECM Terminal Function
Connector [C100-A]
| Pin No. | Description | Connected to |
|---|---|---|
| 1 | - | |
| 2 | - | |
| 3 | - | |
| 4 | - | |
| 5 | EGR valve (motor +) | EGR valve |
| 6 | EGR valve (motor -) | EGR valve |
| 7 | - | |
| 8 | - | |
| 9 | - | |
| 10 | - | |
| 11 | - | |
| 12 | Fuel Tank Pressure Sensor (FTPS) signal input | Fuel Tank Pressure Sensor (FTPS) |
| 13 | Wake Up signal | Body Control Module (BCM) |
| 14 | - | |
| 15 | EGR valve (Feedback signal) | EGR valve |
| 16 | - | |
| 17 | Engine Coolant Temperature Sensor (ECTS) signal input | Engine Coolant Temperature Sensor (ECTS) |
| 18 | - | |
| 19 | - | |
| 20 | Ignition Coil (Cylinder #3) control output | Ignition Coil (Cylinder #3) |
| 21 | Ignition Coil (Cylinder #2) control output | Ignition Coil (Cylinder #2) |
| 22 | - | |
| 23 | - | |
| 24 | - | |
| 25 | - | |
| 26 | PWM_Command | Oil Pump Unit (OPCU) |
| 27 | - | |
| 28 | - | |
| 29 | - | |
| 30 | - | |
| 31 | - | |
| 32 | Mass Air Flow Sensor (MAFS) signal input | Mass Air Flow Sensor (MAFS) |
| 33 | - | |
| 34 | Sensor ground | Fuel Tank Pressure Sensor (FTPS) |
| 35 | - | |
| 36 | EGR valve (Ground) | EGR valve |
| 37 | Sensor ground | Engine Coolant Temperature Sensor (ECTS) |
| 38 | Sensor ground | Rail Pressure Sensor (RPS) |
| 39 | Rail Pressure Sensor (RPS) signal input | Rail Pressure Sensor (RPS) |
| 40 | - | |
| 41 | Ignition Coil (Cylinder #1) control output | Ignition Coil (Cylinder #1) |
| 42 | Ignition Coil (Cylinder #4) control output | Ignition Coil (Cylinder #4) |
| 43 | - | |
| 44 | - | |
| 45 | - | |
| 46 | - | |
| 47 | - | |
| 48 | - | |
| 49 | Sensor ground | Crankshaft Position Sensor (CKPS) |
| 50 | Sensor ground | Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] |
| 51 | Sensor ground | Camshaft Position Sensor (CMPS) [Bank 1/Intake] |
| 52 | Sensor ground | Mass Air Flow Sensor (MAFS) |
| 53 | - | |
| 54 | - | |
| 55 | - | |
| 56 | - | |
| 57 | - | |
| 58 | - | |
| 59 | Sensor ground | Throttle Position Sensor (TPS) 1, 2 |
| 60 | Sensor ground | Manifold Absolute Pressure Sensor (MAPS) |
| 61 | Sensor shield | Knock Sensor (KS) |
| 62 | Sensor ground | Knock Sensor (KS) |
| 63 | Knock Sensor (KS) signal input | Knock Sensor (KS) |
| 64 | - | |
| 65 | - | |
| 66 | - | |
| 67 | - | |
| 68 | - | |
| 69 | - | |
| 70 | OPCU Condition | Oil Pump Unit (OPCU) |
| 71 | - | |
| 72 | - | |
| 73 | - | |
| 74 | Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] signal input | Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] |
| 75 | - | |
| 76 | - | |
| 77 | - | |
| 78 | - | |
| 79 | - | |
| 80 | Throttle Position Sensor (TPS) 2 signal input | Throttle Position Sensor (TPS) 2 |
| 81 | Intake Air Temperature Sensor (IATS) signal input | Intake Air Temperature Sensor (IATS) |
| 82 | Manifold Absolute Pressure Sensor (MAPS) signal input | Manifold Absolute Pressure Sensor (MAPS) |
| 83 | Rc/Rp (Pump Cell Voltage) | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
| 84 | VS-/IP- (Common Ground for VS, IP) | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
| 85 | - | |
| 86 | - | |
| 87 | - | |
| 88 | - | |
| 89 | ETC Motor [+] control output | ETC Motor |
| 90 | ETC Motor [-] control output | ETC Motor |
| 91 | - | |
| 92 | - | |
| 93 | - | |
| 94 | - | |
| 95 | Crankshaft Position Sensor (CKPS) signal input | Crankshaft Position Sensor (CKPS) |
| 96 | Camshaft Position Sensor (CMPS) [Bank 1/Intake] signal input | Camshaft Position Sensor (CMPS) [Bank 1/Intake] |
| 97 | - | |
| 98 | - | |
| 99 | Sensor power (+5V) | Crankshaft Position Sensor (CKPS) |
| Fuel Tank Pressure Sensor (FTPS) | ||
| EGR valve | ||
| 100 | Throttle Position Sensor (TPS) 1 signal input | Throttle Position Sensor (TPS) 1 |
| 101 | Sensor power (+5V) | Throttle Position Sensor (TPS) 1, 2 |
| 102 | Sensor ground | Rail Pressure Sensor (RPS) |
| 103 | Sensor power (+5V) | Manifold Absolute Pressure Sensor (MAPS) |
| 104 | Rc (Comprehensative Resistance) | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
| 105 | VS + (NERNST Cell Voltage) | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
Connector [C100-B]
| Pin No. | 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), MultiPurpose Check Connector |
| 9 | - | |
| 10 | Brake Switch [test] signal input | Brake Switch |
| 11 | - | |
| 12 | - | |
| 13 | Electrical load signal input | Wiper Motor |
| 14 | Immobilizer communication line | Smart key Control Module |
| 15 | - | |
| 16 | Main Relay control output | Main Relay |
| 17 | Sensor ground | Evaporation Leak Check Module (ELCM) |
| 18 | - | |
| 19 | - | |
| 20 | CVVT Oil Control (OCV) Valve [Bank 1/Intake] control output | CVVT Oil Control (OCV) Valve [Bank 1/Intake] |
| 21 | Ground | Evaporation Leak Check Module (ELCM) |
| 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), MultiPurpose 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 | Evaporation Position Sensor signal input | Evaporation Leak Check Module (ELCM) |
| 32 | LIN communication signal input | Battery Sensor |
| 33 | Fuel Pump Relay control output | Fuel Pump Relay |
| 34 | - | |
| 35 | Cooling Fan PWM control output | Cooling Fan Motor |
| 36 | - | |
| 37 | - | |
| 38 | ||
| 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 (HO2S) [Bank 1/Sensor 2] |
| 45 | - | |
| 46 | Sensor ground | Accelerator Position Sensor (APS) 2 |
| 47 | Sensor ground | Accelerator Position Sensor (APS) 1 |
| 48 | Sensor ground | Evaporation Leak Check Module (ELCM) |
| 49 | - | |
| 50 | Sensor ground | A/C Pressure Transducer (APT) |
| 51 | - | |
| 52 | - | |
| 53 | - | |
| 54 | Vehicle speed signal output | Cluster |
| 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 | H-CAN [low] | Other control module, Data Link Connector (DLC), MultiPurpose Check Connector |
| 60 | C-CAN [high] | Other control module, Data Link Connector (DLC), MultiPurpose Check Connector |
| 61 | - | |
| 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 | Electric Water Pump (Stand-by) | Electric Water Pump (EWP) |
| 70 | - | |
| 71 | Purge Control Solenoid Valve (PCSV) control output | Purge Control Solenoid Valve (PCSV) |
| 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 | H-CAN [high] | Other control module, Data Link Connector (DLC), MultiPurpose Check Connector |
| 77 | C-CAN [low] | Other control module, Data Link Connector (DLC), MultiPurpose Check Connector |
| 78 | Vehicle speed signal input | Integrated brake actuation unit |
| Smart key Control Module | ||
| 79 | Sensor power (+5V) | A/C Pressure Transducer (APT) |
| Evaporation Leak Check Module (ELCM) | ||
| 80 | - | |
| 81 | Sensor power (+5V) | Accelerator Position Sensor (APS) 1 |
| 82 | Sensor power (+5V) | Accelerator Position Sensor (APS) 2 |
| 83 | - | |
| 84 | Fuel Tank Level Sender | Fuel Tank Level Sender |
| 85 | Fuel Tank Isolation Valve (FTIV) relay control | Fuel Tank Isolation Valve (FTIV) |
| 86 | CVVT Oil Control (OCV) Valve [Bank 1/Exhaust] control output | CVVT Oil Control Valve (OCV) [Bank 1/Exhaust] |
| 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 Control Valve [high] Control | Fuel Pressure Control Valve |
| 91 | Fuel Pressure Control Valve [low] Control | Fuel Pressure Control 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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