Checking the fuel tank system

Ignition off.
Carefully pressurize the fuel tank system to 7 kPa. The cock must be at right angles to the hoses.
NOTE:
Max 10 kPa.

Check the fuel tank system by spraying soapy water from the EVAP canister to the canister purge (CP) valve. Also spray the line between the fuel tank and the EVAP canister shut-off valve. Also check the filler pipe and the fuel tank filler cap.

It may be necessary to lower the fuel tank in order to fault-trace hoses and connectors on top of the fuel tank.

Remedy the leakage.

Fig 1: Identifying Manometer, Hose And Pressure Regulator
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Hose Clip On Hose
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification information