Checking the Function Of the Electric Auxiliary Pump

Fig 1: Identifying Engine Guard And Vacuum Hose Of Pump

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Remove the engine guard.
  • LHD car, see 2 in Fig 1.
  • RHD car, see 1 in Fig 1.
• Move the insulation aside and detach the vacuum hose of the pump from the T-valve.
  • LHD car, see 2 in Fig 1.
  • RHD car, see 1 in Fig 1.
  NOTE: First check the function of the T-valve. See Checking the T-valve 
• Ignition on: Listen to the electric auxiliary pump. Is it activated and does it run for a few seconds?

• If the electric auxiliary pump is not activated, see Checking Fuses, Relays, Pressostat And Cable Harness 
• If the electric auxiliary pump is activated and runs, see Checking the Output Of the Electric Auxiliary Pump