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Home >> Subaru >> 2006 >> B9 Tribeca Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H6DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0447 Evaporative Emission Control System Vent Control Circuit Open >> Diagnostic Method
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Diagnostic Method

Abnormality Judgment 

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

Judgment Value 

JUDGMENT VALUE - ABNORMALITY JUDGMENT

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 seconds

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

Normality Judgment 

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

Judgment Value 

JUDGMENT VALUE - NORMALITY JUDGMENT

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