Fuel Pump
WARNING: This page is about a different car, the 1985 Nissan 200SX. However, it is still accessible from the selected car via links, so may be relevant.
The EFI control unit operates electric fuel pump. When ignition switch is turned to "ON" or "START" position, the fuel pump operates. It will operate for 16.7 seconds before engine is cranked before shutting off.