2. Check Fuel Tank Temperature Sensor Power Supply Circuit

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect "fuel level sensor unit and fuel pump" harness connector.
Turn ignition switch ON.
Check voltage between "fuel level sensor unit and fuel pump" terminal 4 and ground with CONSULT-II or tester.
1. Voltage: Approximately 5V

Fig 1: Checking voltage between "fuel level sensor unit & fuel pump" terminal 4 & ground

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

OK or NG

OK: GO TO 4. CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT .

NG: GO TO 3.