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: Master warning group

This warning light informs the driver the following situations. - Forward Collision-Avoidance Assist malfunction (if equipped) - Forward Collision-Avoidance Assist radar blocked (if equipped) - Blind-Spot Collision Warning malfunction (if equipped) - Blind-Spot Collision Warning radar blocked (if equipped) - LED headlight malfunction (if equipped) - High Beam Assist malfunction (if equipped) - Smart Cruise Control malfunction (if equipped) - Smart Cruise Control radar blocked (if equipped) - Tire Pressure Monitoring System (TPMS) malfunction The Master Warning Light illuminates if one or more of the above warning situations occur...

Hyundai Santa Fe (TM) 2019-2025 Service Manual: Crash Pad Side Cover. Repair procedures

Replacement    • Put on gloves to prevent hand injuries.    • When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components...