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Home >> Subaru >> 2007 >> Outback XT Limited, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0418 Secondary Air Injection System Control "A" Circuit Open >> Diagnostic Method
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Diagnostic Method

Abnormality Judgment 

Judge as NG if the continuous time of meeting the following conditions exceeds 2.5 seconds.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Battery voltage ≥ 10.9 V
Ignition ON
Terminal output voltage when ECM outputs OFF signal Low

Time Needed for Diagnosis:  2.5 seconds

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

Normality Judgment 

Judge as OK and clear the NG if the following conditions are established.

Judgment Value 

JUDGMENT VALUE

Malfunction Criteria Threshold Value
Battery voltage ≥ 10.9 V
Ignition ON
Terminal output voltage when ECM outputs OFF signal High