Subaru IMPREZA GD 2007 Series Manual page 1831

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
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 CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
8. FAIL SAFE
Intake air temperature sensor process: Intake air temperature is fixed at 20°C (68°F).
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
GD(H4DOTC)-40