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.
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HOMESERVICE MANUALSHYUNDAI2014SONATA HYBRIDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM (HEV)ENGINE CONTROL MODULE (ECM)SCHEMATIC DIAGRAMSECM TERMINAL AND INPUT/OUTPUT SIGNALECM TERMINAL FUNCTIONECM TERMINAL INPUT/OUTPUT SIGNAL
2014 Hyundai Sonata Hybrid
ECM Terminal Input/Output signal
2014 Hyundai Sonata HybridSECTION ECM Terminal Input/Output signal
NOTE:
Engine related parameters will only have valid values when the engine is requested to run by the HPCU (HEV control module). When engine does not run values will be invalid.
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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.