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: Calibrating the Battery Sensor

[A] : Battery sensor 1. Turn off the engine. 2. Disconnect all electronic devices that were additionally installed after the vehicle was delivered, such as navigation, dashcam, etc. 3. After 4 hours with the engine off, turn the engine on and off 3 to 4 times...

Hyundai Santa Fe (TM) 2019-2024 Owner's Manual: System operation

Operating button Press the Parking/View button (1) to turn on Surround View Monitor. Press the button again to turn off the system. Other view modes can be selected by touching the view icons (2) on the Surround View Monitor screen. When one of the infotainment system button (3) is pressed without the gear in R (Reverse), Surround View Monitor will turn off...