Checking the fuel tank system

Fig 1: Identifying Ignition OFF

GLL101045

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Carefully pressurize the fuel tank system to 7 kPa.
Turn the EVAP canister shut-off valve so that it is at a right angle to the hoses.

WARNING:
Max 10 kPa

Check the fuel tank system by spraying it with soapy water from the EVAP canister to the canister purge (CP) valve. Also spray the line with the pressure regulator and roll-over valve to the fuel tank. 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.

WARNING:
Never leave the car unattended with its system pressurized.

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.

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Refer to Verification information