Hyundai Ioniq: Engine Control System / Engine Coolant Temperature Sensor (ECTS). Description and operation
Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor that changes resistance with the temperature.
The electrical resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference +5V is supplied to the ECTS via 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 value of the thermistor in the ECTS changes according to the engine coolant temperature, the output voltage also changes.
During cold engine operation, the ECM increases the fuel injection duration and controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

Inspection1.Turn the ignition switch OFF.2.Disconnect the IATS connector.3.Measure resistance between the IATS terminals 3 and 4.4.Check that the resistance is within the specification...
Specification
Temperature
Resistance (kΩ)
°C
°F
-40-4048...
Other information:
Safety PrecautionPrecautions To Take Before Servicing High Voltage System
•
Since hybrid vehicles contain a high voltage battery, if the high voltage system or vehicles are handled incorrectly, this might lead to a serious accidents like electric shock and electric leakage...
Protecting your vehicle from corrosion
By using the most advanced design and construction practices to combat corrosion,
HYUNDAI produces vehicles of the highest quality. However, this is only part of
the job. To achieve the long-term corrosion resistance your vehicle can deliver,
the owner's cooperation and assistance is also required...
Categories

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