Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

First diagnosis

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: EVAP Pressure Graph (First Diagnosis)

Courtesy of SUBARU OF AMERICA, INC.

Judge as NG when the following conditions are established.

Judgment Value

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria	Threshold Value
ELCM pressure sensor output voltage when purge is not performed - ELCM pressure sensor output voltage when purge is performed	> 0.003 V
The accumulated time while the above conditions are met: cpfokt	< 1500 ms

Time Needed for Diagnosis: 8 - 38 seconds

Second diagnosis

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 2: EVAP Pressure Graph (Second Diagnosis)

Courtesy of SUBARU OF AMERICA, INC.

Judge as NG when the following conditions are established.

Judgment Value

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria	Threshold Value
ELCM pressure value when purge is not performed - ELCM pressure value when purge is performed	< 0.7 kPa (5 mmHg, 0.2 inHg)

Time Needed for Diagnosis: 21 seconds

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