Hyundai Kona Quiz
Engine Control System/Fuel System

Engine Coolant Temperature (ECT) Sensor Description and Operation

In this manual: Engine Control System/Fuel System
General Information — 17Engine Mechanical System — 85Engine Electrical System — 50Emission Control System — 26Engine Control System/Fuel System — 152DCT (Dual Clutch Transmission) System — 50Four-Wheel Drive (4WD) System — 21Propeller Shaft and Axle (2WD-FF) — 28Suspension System (without ECS) — 32Steering — 21Restraints — 38Brake System — 64Body (Interior and Exterior) — 205Body Electrical System — 1Heating, Ventilation, and Air Conditioning — 66
~1min read

Description

The Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head to detect the temperature of the engine coolant. The ECTS uses a thermistor that changes resistance depending on temperature. The electrical resistance of the ECTS decreases as temperature rises and increases as temperature falls. A reference +5V is supplied to the ECTS through a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the ECTS are connected in series. When the resistance of the thermistor in the ECTS changes according to engine coolant temperature, the output voltage also changes. When the engine is cold, the ECM increases the fuel injection duration and controls ignition timing using the engine coolant temperature information to prevent engine stall and improve drivability.

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