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

• Disconnect the hose between the canister purge (CP) valve and the EVAP canister from the canister purge (CP) valve.
• Start the engine and let it run at idle speed

  Read off the canister purge (CP) valve pulse signal.

  There should not be a vacuum in the canister purge (CP) valve when the pulse signal is 0%.

  Other information 

  • To access / replace the canister purge (CP) valve, see Replacing the canister purge (CP) valve .
  Fig 1: Identifying Evaporative Emission System (EVAP) Valve Connector Terminals

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

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

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the canister purge (CP) valve OK? 

• YES 

  Refer to Checking the canister purge (CP) valve 

• NO 

  Refer to Verification information