Diagnostic Method

Close the Evaporative Leak Check Module switching valve, and close the fuel tank completely, and perform the forced purging. If pressure change amount is 667 Pa (5 mmHg, 0.2 inHg) or less, judge as malfunction of purge flow.

Fig 1: Purge Duty Cycle Graph

Courtesy of SUBARU OF AMERICA, INC.

Judge as NG when the following conditions are established.

Time Needed for Diagnosis:  20 seconds

Malfunction Indicator Light Illumination:  Illuminates as soon as a malfunction occurs.