Engine Coolant Temperature Sensor

WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.
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Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.
If NG, replace engine coolant temperature sensor.

Fig 2: Engine Coolant Temperature Sensor Voltage Resistance Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Temperature - Resistance Graph (ECT)
Courtesy of NISSAN MOTOR CO., U.S.A.