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Engine Coolant Temperature Sensor

Check resistance as shown in the figure.

Fig 1: Checking Engine Coolant Temperature Sensor Resistance
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Reference Data
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Resistance/Temperature Graph
Courtesy of NISSAN MOTOR CO., U.S.A.
If NG, replace engine coolant temperature sensor.