Fuel Pump Actuator
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
The fuel pump actuator is a normally open, Pulse-Width Modulated (PWM) valve used to control fuel volume into the high pressure fuel pump. The ECM controls operation of the fuel pump actuator and fuel pressure relief valve to regulate fuel rail volume and pressure. The fuel pump actuator and O-rings are the only serviceable components on the high pressure fuel pump.