Checking the vacuum downstream of the canister purge (CP) valve

NOTE:

As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information is always correct.

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Start the engine and let it idle.
Disconnect the hose between the canister purge (CP) valve and the EVAP canister from the canister purge (CP) valve.
Read off the canister purge (CP) valve. This is to check whether the valve is activated.
Check that there is a vacuum in the canister purge (CP) valve when the valve is activated.

Fig 2: Identifying VCT2000 Diagnostic Tool
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Vacuum Pump On Canister Purge (CP) Valve
Courtesy of VOLVO CARS OF NORTH AMERICA.

Is there a vacuum?

YES
Refer to Checking the vacuum at the EVAP canister
NO
Refer to Checking the canister purge (CP) valve vacuum