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Home >> Subaru >> 2007 >> Outback XT Limited, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0447 Evaporative Emission Control System Vent Control Circuit Open >> Diagnostic Method
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Diagnostic Method

Judge as NG when the continuous time of meeting the malfunction criteria below becomes 2.5 seconds or more.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Ignition switch ON
Battery voltage ≥ 10.9 V
After engine starting 1 second or more
Terminal output voltage when ECM outputs OFF signal Low

Time Needed for Diagnosis:  2.5 second

Malfunction Indicator Light Illumination:  Illuminates as soon as a malfunction occurs.

Judge as OK and clear the NG when the malfunction criteria below are met.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Ignition switch ON
Battery voltage ≥ 10.9 V
After engine starting 1 second or more
Terminal output voltage when ECM outputs OFF signal High