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 >

ECT SENSOR TEMPERATURE VERSUS RESISTANCE REFERENCE DATA

Engine coolant temperature °C (°F)	Resistance kΩ
20(68)	2.1 - 2.9
50(122)	0.68 - 1.00
90(194)	0.236 - 0.260

Fig 2: ECT Sensor Temperature Versus Resistance Graph

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