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 Tucson Value, FWDFACTORY OEM SERVICE PROCEDURE
ECM Terminal Function
Connector [C300-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 | Electric Waste Gate Actuator (EWGA) DC Motor output (+) | Electric Waste Gate Actuator (EWGA) |
| 5 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] heater control output | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] |
| 6 | - | |
| 7 | - | |
| 8 | - | |
| 9 | 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 | Electric Waste Gate Actuator (EWGA) DC Motor output (-) | Electric Waste Gate Actuator (EWGA) |
| 20 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] 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 | Fuel Tank Pressure Sensor (FTPS) signal input | Fuel Tank Pressure Sensor (FTPS) |
| 27 | Fuel pump relay control output (NON-Smart key type) | Fuel pump relay |
| Canister Close Valve (CCV) control output (Smart key type) | Canister Close Valve (CCV) | |
| 28 | - | |
| 29 | - | |
| 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 | - | |
| 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 | Electric Waste Gate Actuator (EWGA) Feed beck signal | Electric Waste Gate Actuator (EWGA) |
| 53 | Brake Test switch signal input | Brake switch |
| 54 | - | |
| 55 | - | |
| 56 | Electric load signal input [Defrost] | Alternator |
| 57 | Alternator COM signal output | Alternator |
| 58 | Engine speed signal output | Cluster |
| 59 | Cooling fan (PWM) control output | Cooling fan Control Module |
| 60 | - |
Connector [C300-K]
| Pin No. | Description | Connected to |
|---|---|---|
| 1 | ECM ground | Chassis ground |
| 2 | ECM ground | Chassis ground |
| 3 | ECM ground | Chassis ground |
| 4 | Battery power (B+) | Main relay |
| 5 | Battery power (B+) | Battery |
| 6 | Battery power (B+) | Battery |
| 7 | Battery power (B+) | Main relay |
| 8 | Sensor ground | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] |
| 9 | Accelerator Position Sensor (APS) 1 signal input | Accelerator Position Sensor (APS) 1 |
| 10 | Sensor ground | Accelerator Position Sensor (APS) 2 |
| 11 | - | |
| 12 | Sensor ground | Fuel Tank Pressure Sensor (FTPS) |
| 13 | - | |
| 14 | Throttle Position Sensor (TPS) 1 signal input | Throttle Position Sensor (TPS) 1 |
| 15 | - | |
| 16 | - | |
| 17 | Fuel Level signal input | Fuel Level Sender (FLS) |
| 18 | Sensor power (+5V) | Accelerator Position Sensor (APS) 2 |
| 19 | Sensor power (+5V) | Electric Waste Gate Actuator (EWGA) |
| 20 | Sensor power (+5V) | Rail Pressure Sensor (RPS) |
| Boost Pressure Sensor (BPS) | ||
| A/C Pressure Transducer (APT) | ||
| 21 | - | |
| 22 | - | |
| 23 | - | |
| 24 | Alternator PWM signal output [FR] | Alternator |
| 25 | - | |
| 26 | - | |
| 27 | - | |
| 28 | - | |
| 29 | Ignition switch signal input | Ignition switch |
| 30 | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] signal input | Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] |
| 31 | Accelerator Position Sensor (APS) 2 signal input | Accelerator Position Sensor (APS) 2 |
| 32 | Sensor ground | Accelerator Position Sensor (APS) 1 |
| 33 | - | |
| 34 | - | |
| 35 | Sensor ground | Throttle Position Sensor (TPS) 1, 2 |
| 36 | Throttle Position Sensor (TPS) 2 signal input | Throttle Position Sensor (TPS) 2 |
| 37 | - | |
| 38 | - | |
| 39 | Sensor power (+5V) | Throttle Position Sensor (TPS) 1, 2 |
| 40 | Sensor power (+5V) | Accelerator Position Sensor (APS) 1 |
| 41 | Sensor power (+5V) | Manifold Absolute Pressure Sensor (MAPS) |
| Fuel Tank Pressure Sensor (FTPS) | ||
| 42 | Sensor power (+5V) | Camshaft Position Sensor (CMPS) [Bank 1/Intake] |
| Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] | ||
| 43 | - | |
| 44 | - | |
| 45 | A/C Pressure Transducer (APT) signal input | A/C Pressure Transducer (APT) |
| 46 | Vehicle speed signal input | Vehicle Speed Sensor |
| 47 | - | |
| 48 | - | |
| 49 | - | |
| 50 | - | |
| 51 | - | |
| 52 | VS-/IP- (Common Ground for VS, IP) | Heated Oxygen Sensor [Bank 1/Sensor 1] |
| 53 | Rc/Rp (Pump Cell Voltage) | Heated Oxygen Sensor [Bank 1/Sensor 1] |
| 54 | - | |
| 55 | Sensor ground | Boost Pressure Sensor (BPS) |
| 56 | - | - |
| 57 | Boost Pressure Sensor (BPS) signal input | Boost Pressure Sensor (BPS) |
| 58 | Rail Pressure Sensor (RPS) signal input | Rail Pressure Sensor (RPS) |
| 59 | - | |
| 60 | Start signal input | PDM module |
| 61 | LIN communication signal input | |
| 62 | CCP-CAN [Low] | Other control module, Data Link Connector (DLC), Multi-Purpose Check Connector |
| 63 | C-CAN [Low] | Other control module, Data Link Connector (DLC), Multi-Purpose Check Connector |
| 64 | Sensor ground | Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] |
| 65 | Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] signal input | Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] |
| 66 | - | |
| 67 | Crankshaft Position Sensor (CKPS) [B] signal input | Crankshaft Position Sensor (CKPS) |
| 68 | - | |
| 69 | - | |
| 70 | RCV control Solenoid Valve control output | RCV control solenoid valve |
| 71 | - | |
| 72 | Purge Control Solenoid Valve (PCSV) control output | Purge Control Solenoid Valve (PCSV) |
| 73 | - | |
| 74 | VS+ (NERNST Cell Voltage) | Heated Oxygen Sensor [Bank 1/Sensor 1] |
| 75 | Rc (Compensative Resistance) | Heated Oxygen Sensor [Bank 1/Sensor 1] |
| 76 | Sensor ground | Rail Pressure Sensor (RPS) |
| 77 | Sensor ground | A/C Pressure Transducer (APT) |
| 78 | Sensor ground | Manifold Absolute Pressure Sensor (MAPS) |
| 79 | Intake Temperature Sensor (IATS) signal input | Intake Temperature Sensor (IATS) |
| 80 | Manifold Absolute Pressure Sensor (MAPS) signal input | Manifold Absolute Pressure Sensor (MAPS) |
| 81 | - | |
| 82 | - | |
| 83 | Immobilizer communication line | Smart Key Control Module [With Button Engine Start System] |
| Immobilizer Control Module [Without Button Engine Start System] | ||
| 84 | CCP-CAN [High] | Other control module, Data Link Connector (DLC), Multi-Purpose Check Connector |
| 85 | C-CAN [High] | Other control module, Data Link Connector (DLC), Multi-Purpose Check Connector |
| 86 | Sensor ground | Camshaft Position Sensor (CMPS) [Bank 1/Intake] |
| 87 | Camshaft Position Sensor (CMPS) [Bank 1/Intake] signal input | Camshaft Position Sensor (CMPS) [Bank 1/Intake] |
| 88 | - | |
| 89 | Crankshaft Position Sensor (CKPS) [A] signal input | Crankshaft Position Sensor (CKPS) |
| 90 | Canister Close Valve (CCV) control output (NON-Smart key type) | Canister Close Valve (CCV) |
| Fuel pump relay control output (Smart key type) | Fuel pump relay | |
| 91 | - | |
| 92 | - | |
| 93 | Main relay control output | Main relay |
| 94 | Start relay (Low) control output | Start relay |
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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