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

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Start the engine and let it run at idle speed.
• 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 Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Checking For Vacuum In Canister Purge 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