Tank integrity diagnosis

/ 9-5 (9600) / 2005 / 2. Engine / Evaporative Emission System ORVR OBD II / Technical description / Tank integrity diagnosis

It is possible to check the evaporative emission system for leaks with the tank integrity diagnosis. If there is a leak, it will not be possible to create or retain a vacuum in the system during the diagnosis.

The diagnosis logic has been improved to give a more reliable diagnosis. Two tests must have failed during the same driving cycle before a diagnostic trouble code is generated.

The diagnosis is performed once per trip and its objective is to determine whether a leak corresponding to a hole larger than 0.5mm (0.020”) in diameter is present in the evaporative emission system.

Tank integrity diagnosis

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