Hyundai Santa Fe: 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.

Intake Air Temperature Sensor (IATS). Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the IATS connector. 3...

Engine Coolant Temperature Sensor (ECTS). Specifications

Specification Temperature [°C (°F)] Resistance (kΩ) -40 (-40) 41.74 - 54.54 -30 (-22) 23...

Other information:

Hyundai Santa Fe (TM) 2019-2024 Owner's Manual: Downhill Brake Control (DBC)

Downhill Brake Control assists the driver to descend down a steep hill without having to depress the brake pedal. The system automatically applies the brakes to maintain vehicle speed below a certain speed and allows the driver to concentrate on steering the vehicle down hill...

Hyundai Santa Fe (TM) 2019-2024 Service Manual: Battery Sensor. Repair procedures

Removal 1. Turn the ignition switch OFF and disconnect the battery (-) terminal. 2. Disconnect the battery sensor connector (A). 3. Remove the battery sensor (A)...