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) 2019-2025 Service Manual: Surround View Monitor (SVM) Unit. Repair procedures

Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the carash pad lower panel. (Refer to Body - "Crash Pad Lower Panel") 3. Remove the crash pad center panel...

Hyundai Santa Fe (TM) 2019-2025 Service Manual: Description and operation

Description The optimal seat position set by the driver is memorized into the power seat unit by using IMS switch. In case of the position change, the seat can restore its preset position by IMS switch. It has safety functions of restoring process prohibition during driving and of emergency stop of the linked motion...