XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)
4. Fuel filter, cannot be replaced separately
5. Relief valve, releases fuel into the pump housing
6. Ejector pump, continuously fills the pump housing with fuel. The fuel always flows from the fuel pump through the ejector and back to the pump
The fuel pump is supplied with battery voltage by the fuel pump control module and is grounded in the car body.
The engine control module (ECM) has diagnostics for the fuel pump function to ensure that the pressure is correct. Also see Fuel pressure regulation,
The fuel pump can be activated and its status read off using VADIS/VIDA.
The pressure in the fuel rail can be measured by connecting a manometer to a nipple. This nipple is on the right-hand end of the fuel rail.