2. Check FPCM Power Supply Circuit

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect fuel pump control module (FPCM) harness connector.

Fig 1: Identifying Fuel Pump Control Module (FPCM)
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn ignition switch ON.
Check voltage between FPCM terminal 2 and ground with CONSULT-II or tester.

Fig 2: Checking Voltage Between FPCM Terminal 2 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Voltage: Battery voltage

OK or NG

OK: GO TO 4. CHECK FPCM GROUND CIRCUIT-I FOR OPEN AND SHORT .
NG: GO TO 3.