Component Description

The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

Fig 1: Identifying Engine Coolant Temperature Sensor Components

Courtesy of NISSAN MOTOR CO., U.S.A.

< Reference data > 

For engine coolant temperature sensor specifications, see Fig 2 and for graph of thermistor performance, see Figure.

Fig 2: Identifying Engine Coolant Temperature Sensor Thermistor Specifications

Courtesy of NISSAN MOTOR CO., U.S.A.