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: Head Up Display Unit. Troubleshooting

Troubleshooting Category Error symptoms inspection item Detailed inspection item Related parts Lighting • HUD not working • Lighting brightness not automatically controlled (no difference between day and night) • Check the lighting control • Check the ambient light sensor operation • Check the CAN communication • Check the lighting control in the cluster USM → If working, HUD has no problem...

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

Description The Alternator has eight built-in diodes, each rectifying AC current to DC current. Therefore, DC current appears at alternator "B" terminal. In addition, the charging voltage of this alternator is regulated by the battery voltage detection system...