Checking The Component

Slacken off the evaporative emission system (EVAP) valve
Connect a vacuum pump to the evaporative emission system (EVAP) valve terminal (B). Pump a vacuum. Check that there is no leakage through the evaporative emission system (EVAP) valve by listening to and checking via the pump gauge that the pressure is stable
Connect the Evaporative emission system (EVAP) valve connector
Ignition on
Activate the evaporative emission system (EVAP) valve. When the Evaporative emission system (EVAP) valve is activated, the valve opens and clicks. Check on the pump gauge that the vacuum drops (the pressure evens out) when the evaporative emission system (EVAP) valve opens.
If the function is OK, there must be no leakage when the evaporative emission system (EVAP) valve is closed (stable pressure on the pump gauge) and the vacuum must drop when the evaporative emission system (EVAP) valve opens (the pressure evens out).

The evaporative emission system (EVAP) valve is damaged if the function is faulty.

If the function of the evaporative emission system (EVAP) valve is correct, check the hose and hose connections between the evaporative emission system (EVAP) valve for leakage.

Remedy as necessary.

Other information
- see LOCATION OF COMPONENTS, ENGINE COMPARTMENT
Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Checking Canister Purge (CP) Valve
Courtesy of VOLVO CARS OF NORTH AMERICA.