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 RESISTANCE VERSUS TEMPERATURE SPECIFICATIONS

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

If NG, replace engine coolant temperature sensor.

Fig 2: ECT Sensor Resistance Versus Resistance Graph
Courtesy of NISSAN MOTOR CO., U.S.A.