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 Owner's Manual: System Operation

When all the conditions are satisfied, the Vehicle Auto-Shut Off operates and turns the engine off automatically after 60 minutes. A timer appears on the instrument cluster 30 minutes before vehicle shut off. Resetting cluster timer To reset the cluster timer, do one of following: Release the accelerator pedal or brake pedal after Vehicle Auto-Shut Off is complete...

Hyundai Santa Fe (TM) 2019-2025 Owner's Manual: Air bag - supplemental restraint system

1. Driver’s front air bag 2. Passenger’s front air bag 3. Side air bag 4. Curtain air bag The vehicles are equipped with a Supplemental Air Bag System for the driver’s seat and front passenger’s seats. The front air bags are designed to supplement the three-point seat belts...