Test pressurization of the fuel tank system

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Max 50 liters of fuel in the fuel tank.
• Ignition off.
• Clamp the hose between the EVAP canister shut-off valve and the EVAP canister with a hose clip to seal it.
• Carefully disconnect the EVAP canister hose from the canister purge (CP) valve.

  Connect manometer 9995646 to the hose and the pressure regulator 9995544 to the manometer.

  Set the pressure to 7 kPa (read off on the manometer 9995646 .

  The cock must be at right angles to the hoses.

  WARNING:

  Max 10 kPa.

  Let the pressure build up for 5 minutes.

  Close the cock (the pressure may now drop by 1-2 kPa before it stabilizes). Read off the pressure.

  Turn the cock towards the EVAP canister hose.

  Wait for 10 minutes.

  WARNING:

  Never leave the car unattended with its system pressurized.

  The pressure must be stable (it may rise a little due to fuel evaporation).

  Fig 2: Identifying Manometer, Hose And Pressure Regulator

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Hose Clip On Hose

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the pressure stable? 

• YES 

  Refer to Checking the hose to the EVAP canister shut-off valve 

• NO 

  Refer to Checking the fuel tank system