WARNING: This page is about a different car, the 2004 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
Check resistance between fuel level sensor unit and fuel pump connector terminals 2 and 5.
Fig 1: Checking Fuel Level Sensor Unit & Fuel Pump
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Checking Fuel Level Sensor Unit & Fuel Pump