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