Fuel Pump
WARNING: This page is about a different car, the 2010 Volvo V70, 2009 Volvo V70, and 2008 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
The fuel pump is an electric piston pump that doses the right amount of fuel to the heater. The fuel pump power supply is connected to the control module and grounded to the grounding point. By pulsing the feed with a varying frequency, the control module can determine the amount of fuel delivered for combustion.
The fuel pump is located at the fuel tank, connected without filter to a separately prepared tank connection.
There are diagnostics for the electronics of the fuel pump.