Checking the pump capacity
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Close the cock for a maximum of 5 seconds. If the pump is fault free, the manometer pressure increases to correct value:
Pump A = 10.0-11.0 MPa
Pump B = 11.0-12.0 MPa
The pump must be replaced if the pressure is outside the above values
Switch off the engine.