Activating the leak diagnostic

HINT: If the test does not launch, this could be because the evaporative emission system (EVAP) control has not been active above a certain level. The control must change the level between each quick test carried out. The level is reached by allowing the engine to idle for approximately 5 minutes. 

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Start the engine. Allow the engine to idle.
  NOTE:

  The engine must be idling throughout the test.

• Clicking the VCT2000 symbol to activate the leak diagnostic
• Wait until the engine coolant temperature (ECT) exceeds 60 °C
• Start the leak diagnostic. YES is displayed during leak diagnostics
• Wait until the leak diagnostic is complete. Leak diagnostic active NO and leak diagnostic complete YES is displayed when the leak diagnostic is complete.

  HINT: The time taken for the diagnostic varies depending on the fault status of the fuel tank system. The diagnostic process may take up to 4 minutes. 

• Read off the results of the leak diagnostic. The leak diagnostic results are read off automatically when the test has been correctly completed
• The OK status will be displayed if the control module has not detected any faults. The Not OK status, and a number from 1-8 will be displayed if the control module has detected any faults. To interpret these faults, see the status definitions below.
  NOTE:

  The status types can be translated into diagnostic trouble codes (DTCs). However they are not stored as DTCs during this test.

• Click the stop button to rerun the test.

  Status definitions: 

  • OK = The system is free of faults
  • Not OK, status 1 = Leak diagnostic pump, signal too low. (ECM-65, signal too low)
  • Not OK, status 2 = Leak diagnostic pump, signal too high. (ECM-65, signal too high)
  • Not OK, status 3 = Leak diagnostic pump, faulty signal. (ECM-65, faulty signal)
  • Not OK, status 4 = Leak diagnostic pump, blocked hose. (ECM-66, signal too low)
  • Not OK, status 5 = Leakage 0.5 mm. (ECM-68, minor leak)
  • Not OK, status 6 = Leakage 1 mm. (ECM-68, major leak)
  • Not OK, status 7 = Leakage larger than 1 mm. (ECM-68, Fuel tank filler cap missing)
  • Not OK, status 8 = Evaporative emission (EVAP) system blocked. (ECM-6A, signal too low).

  Select a suitable alternative to continue: 

  1. The status is OK

     VERIFIED:  Troubleshooting has been completed.

  2. Status Not OK (for the current diagnostic trouble code (DTC)) has been detected

     Refer to Information 

  3. Status Not OK, (for another diagnostic trouble code (DTC)) has been detected.

     Refer to Fault-tracing information: 

  Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.