Fuel Tank System Quick Test

Fuel tank system quick test

Checking diagnostic trouble codes (DTCs)

Note! To perform quick-test of the tank system, no diagnostic trouble codes may be stored in the Engine control module (ECM).




- Ignition on.




- Read off diagnostic trouble codes (DTCs)
- Any diagnostic trouble codes (DTCs) stored must be remedied and erased before the test can be carried out

Are diagnostic trouble codes stored in the control module?

Yes - DONE

No - Activating the leak diagnostic

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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.




- 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 does not detect any faults. The Not OK status, numbered 1-8 will be displayed if the control module detects 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.

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 Continue.

Continue - DONE

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