Subaru 42022AG15A Fuel Pump

To inspect the fuel system, remove the fuel cap and turn the ignition key to ON. If no sound is heard, check the fuel pump fuse and trace the circuit for a short. Remove the relay of the fuel pump and look for the battery voltage. Unplug the fuel pump connector at the tank and look for voltage with the ignition turned on. Relieve fuel pressure, disconnect the negative battery cable, and insert the fuel pressure gauge between the fuel hose and filter inlet pipe. Start the engine and compare pressure readings with the Specifications. If incorrect, check for vacuum at the fuel pressure regulator, a fuel filter or line restriction, or a blocked fuel return hose. After testing, relieve pressure, take out the gauge and connect the fuel line.

The installation process is otherwise the reverse of removal. This means you need to follow the steps in reverse order, ensuring all connections are secure and components are properly installed.

By disconnecting the electrical connector from the fuel pump, removing the pump from the pump holder, and disconnecting the inlet strainer tube from the pump.

Before removing the FPCM, you need to disconnect the electrical connector from it.