Subaru Impreza 2005 General Description Manual page 256

Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When "Clear Memory" was performed (Only with engine stopped)
8. FAIL SAFE
• Single malfunction: Control with normal sensor
• Multi malfunction: Fix the throttle opening angle to 6°.
9. ECM OPERATION AT DTC SETTING
• Memorize the freeze frame data. (For test mode $02)
• Memorize the diagnostic value and trouble standard value. (For test mode $06)
GD(STi)-256