Subaru Impreza 2005 General Description Manual page 16

Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
• Normality Judgment
Judge OK and clear the NG when all the malfunction criteria below are completed.
Judgment Value
Malfunction Criteria Threshold Value
Output voltage level Low
6. DTC CLEAR CONDITION
• When the OK idling cycle was completed 40 times in a row
• When "Clear Memory" was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle was completed 3 times in a row
• When "Clear Memory" was performed
8. FAIL SAFE
• Front oxygen (A/F) sensor activation judgment: Front oxygen (A/F) sensor full activation is not complete,
or front oxygen (A/F) sensor half activation is not complete.
• A/F main learning: Not allowed to calculate the A/F main learning compensation factor.
• Compensation when starting the engine at high temperature: Make the MIN value to be 0 from 0.3 normal-
ly.
• Purge control: Not allowed to purge.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
GD(STi)-16