First 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.

Pressure decreases when the purge is introduced compared with when the purge is not performed. By using this, judge if the purge is correctly performed. If there is no pressure decrease, go to the SECOND DIAGNOSIS .

Fig 1: Purge Duty, Evap. Pressure And Timer 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	> 0.0045 V
The accumulated time while the above conditions are met: cpfokt	< 2000 ms

Time Needed for Diagnosis: 26 seconds

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	> 0.0045 V
The accumulated time while the above conditions are met: cpfokt	≥ 2000 ms

Time Needed for Diagnosis: 26 seconds