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Home >> Subaru >> 2007 >> 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 >> Normality Judgment
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Normality Judgment

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

Judgment Value 

MALFUNCTION CRITERIA AND THRESHOLD VALUE REFERENCE

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