Evaporative Emission System Leak Test

Check 

• 1.
  
  
  WARNING: Before beginning any service procedure, refer to Safety Warnings in General Information. Failure to follow this instruction may result in serious personal injury.

  Refer to: Health and Safety Precautions .

• 2.
  
  Disconnect the vapor tube-to-EVAP canister purge valve quick connect coupling (engine side). Refer to: Quick Release Coupling .

• 3.
  
  Connect the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to the EVAP canister purge valve fitting. Refer to the manufacturer's instructions.

• 4.
  
  Connect the scan tool and open the EVAP canister purge valve.

• 5.
  
  Using the scan tool, close the EVAP canister vent solenoid. Refer to the manufacturer's instructions.

• 6.
  
  Using the VACUTEC Smoke Machine Fuel Evaporative Emission Tester, pressurize the EVAP system.

• 7.
  
  Monitor the indicator flag on the VACUTEC Smoke Machine Fuel Evaporative Emission Tester. If the measurement is below the indicator flag, the system has passed the leak test and the test procedure is complete. If the measurement is above the indicator flag, the system has failed the leak test. If the leak test has failed, proceed to next step.

• 8.
  
  Introduce smoke from the VACUTEC Smoke Machine Fuel Evaporative Emission Tester into the EVAP system. Refer to the manufacturer's instructions.

• 9.
  
  Use the halogen light provided with the VACUTEC Smoke Machine Fuel Evaporative Emission Tester to look for smoke coming from the EVAP system. This would indicate a leak point.

• 10.
  
  Repair any leaks as necessary.

• 11.
  
  Repeat the leak test until the system passes.