Diagnostic Method

Close the ELCM 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: EVAP Pressure Graph (Diagnosis Method)

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.