Engine Coolant Temperature (ECT) Sensor

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Honda S2000, 2004 Honda S2000, 2003 Honda S2000, 2002 Honda S2000, and 2001 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.

The ECT sensor is a temperature dependent resistor (thermistor). The resistance of the thermistor decreases as the engine coolant temperature increases.

Fig 1: Identifying Engine Coolant Temperature Sensor

Courtesy of AMERICAN HONDA MOTOR CO., INC.