Subaru LEGACY 2006 Manual page 450

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Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes more than 1
second (8 cycles).
Judgment Value
Malfunction Criteria
Output voltage level
Front oxygen (A/F) sensor heater control
duty
Time Needed for Diagnosis: 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are completed.
Judgment Value
Malfunction Criteria
Output voltage level
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle is completed 3 times in a row
• When "Clear Memory" is performed
8. FAIL SAFE
• Front oxygen (A/F) sensor heater control: Not allowed to turn on the heater.
• A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
• A/F sub learning: Not allowed to calculate the A/F sub learning compensation factor.
• Purge control: Not allowed to purge.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Threshold Value
Low
< 87.5%
Threshold Value
High
GD(H4SO)-13
GENERAL DESCRIPTION