Hyundai Venue: 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 whose resistance changes 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.

Repair procedures

Inspection 1. Turn ignition switch OFF. 2. Disconnect IATS connector. 3. Measure resistance between IATS terminals 3 and 4...

Engine Coolant Temperature Sensor (ECTS). Specifications

Specification Temperature [°C (°F)] Resistance (kΩ) -40 (-40) 48.14 -20 (-4) 14...

Other information:

Hyundai Venue (QX) (2020-2025) Owners Manual: Heating and Air Conditioning

1. Start the engine. 2. Set the mode to the desired position. To improve the effectiveness of heating and cooling, select the mode according to the following: -- Heating: -- Cooling: 3. Set the temperature control to the desired position. 4. Set the air intake control to fresh mode or recirculation mode position...

Hyundai Venue (QX) (2020-2025) Service Manual: Repair procedures

Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the license lamp assembly after pushing the fixing clip (A). 3. Replace the bulb after turning the bulb socket (B) counterclockwise...