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Engine Coolant Temperature Sensor

Check resistance as shown in Fig 1.

Fig 1: Checking ECT Sensor Resistance

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/TEMPERATURE SPECIFICATIONS

Temperature °C (°F)	Resistance kΩ
20 (68)	2.1 - 2.9
50 (122)	0.68 - 1.0
90 (194)	0.236 - 0.260

If NG, replace engine coolant temperature sensor.