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 hose between EVAP canister shut-off valve and EVAP canister with a hose clip to seal it off.
• Carefully disconnect the EVAP canister hose from the canister purge (CP) valve.

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

  Set pressure to 7 kPa (1.02 psi) (read off on the manometer 9995646 ).

  Cock at right angles to the hoses.

  WARNING:

  Max 10 kPa (1.45 psi).

  Let the pressure build up for 5 minutes.

  Shut off the cock (the pressure may drop 1-2 kPa (0.15 - 0.29 psi) before stabilizing) and read off pressure.

  EVAP canister hose cock.

  Wait for 10 minutes.

  WARNING:

  Never leave the car unattended with its system pressurized.

  The pressure should 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 hose to EVAP canister shut-off valve 

• NO 

  Refer to Checking fuel tank system