Fuel Pump Control Module (M45 & Q45)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Infiniti QX4, 2003 Infiniti Q45, 2003 Infiniti M45, 2003 Infiniti I35, and 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
See DTC P1220: FUEL PUMP CONTROL MODULE under DIAGNOSTIC TESTS in appropriate SELF-DIAGNOSTICS article.