Subaru IMPREZA GD 2007 Series Manual page 1817

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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
• Air flow meter: Engine load is normally calculated by manifold pressure and engine speed; however, cal-
culated only by manifold pressure.
• EVAP conc. learning (fuel): Not allowed to learn.
• Knock compensation:
– Knock compensation final advance/retard angle value = knock compensation value + whole learning
compensation value + portional learning compensation value
– When normal: Knock compensation value = Fixed at 0°CA
– Failure: Knock compensation value ≠ Fixed at 0° CA (When knock: Max. 12°CA retard)
– Whole learning compensation coefficient update not allowed
– Portional learning zone compensation value calculation not allowed.
• ISC control: Open loop compensation is set to (1 g/s). Stop calculation of throttle sensor temperature com-
pensation (hold previous value)
• Purge control: Not allowed to purge.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
GD(H4DOTC)-26