Second Diagnosis

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Close the ELCM switching valve, and close the fuel tank completely, and perform the forced purging. If pressure change amount is 0.7 kPa (5 mmHg, 0.2 inHg) or less, judge as malfunction of purge flow.

Fig 1: Purge Duty, Switching Valve And EVAP Pressure Timing Pattern

Courtesy of SUBARU OF AMERICA, INC.

Abnormality Judgment

Judge as NG when the following conditions are established.

JUDGMENT VALUE

Malfunction Criteria	Threshold Value
ELCM pressure sensor output voltage when purge is not performed - ELCM pressure sensor output voltage when purge is performed	< 0.7 kPa (5 mmHg, 0.2 inHg)
Time of negative pressure introduction	≤ 30000 ms

Time Needed for Diagnosis: 21 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment

Judge as OK and clear the NG if the following conditions are established.

JUDGMENT VALUE

Malfunction Criteria	Threshold Value
ELCM pressure sensor output voltage when purge is not performed - ELCM pressure sensor output voltage when purge is performed	≤ 0.7 kPa (5 mmHg, 0.2 inHg)

Time Needed for Diagnosis: Less than 21 second