Fuel Pump Control Module (FPCM) - Q45
WARNING: This page is about a different car, the 2000 Infiniti Q45 and 2000 Infiniti G20. However, it is still accessible from the selected car via links, so may be relevant.
See DTC P1220: FUEL PUMP CONTROL MODULE (FPCM) under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - Q45 article.