Engine Coolant Temperature Sensor

Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in Fig 1.

Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 And 2

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

Reference data

Fig 2: ECT Sensor Temperature Versus Resistance Graph

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

ECT SENSOR RESISTANCE/VOLTAGE SPECIFICATIONS

Engine coolant temperature °C (°F)

Voltage⁽¹⁾V

Resistance kΩ

20 (68)

3.5

2.1 - 2.9

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

⁽¹⁾	These data are reference values and are measured between ECM terminal 73 (Engine coolant temperature sensor) and ground.