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Fuel Tank Temperature Sensor

Remove fuel level sensor unit.
Check resistance between "fuel level sensor unit and fuel pump" terminals 4 and 2 by heating with hot water or heat gun as shown in the figure.

Fig 1: Temperature/Resistance Chart

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

Fig 2: Testing Fuel Tank Temperature Sensor

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