Water Temperature Sensor (WTS) : Notes

Engine Coolant Temperature Sensor (ECTS) installed in the engine coolant passage of the cylinder head detects the engine coolant temperature and emits signals to the ECM. This part employs a thermistor which is sensitive to change in temperature. The electric resistance of the thermistor decreases in response to a temperature rise (NTC). The ECM determines engine coolant temperature by the sensor output voltage and provides optimum fuel enrichment when the engine is cold.

Fig 1: Locating Water Temperature Sensor

Courtesy of HYUNDAI MOTOR CO.

Fig 2: Circuit Diagram - Water Temperature Sensor

Courtesy of HYUNDAI MOTOR CO.

Fig 3: Identifying Water Temperature Sensor Harness Connector

Courtesy of HYUNDAI MOTOR CO.