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 -0.7 kPa (-0.2 inHg, -5 mmHg) or less, judge as malfunction of purge flow.

Fig 1: Purge Duty Driving Cycle

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 when malfunction occurs in 2 continuous driving cycles.