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) Service Manual: Power Door Lock Switch. Repair procedures

Diagnosis with GDS 1. In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool). The diagnostic system(Diagnostic tool) provides the following information...

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

Replacement 1. Remove the wheel and tire. 2. Remove the valve core and deflate the tire. 3. Install the wheel tire to the tire change machine. 4...