Subaru IMPREZA GD 2007 Series Manual page 2233

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Abnormality Judgment
Judge as NG if the criteria below are met.
Judgment Value
Malfunction Criteria
Integrated times of the condition reach-
ing follows,
DELFLMAX ≥ 0.228 — 0.748 V or
SUMFL ≥ 21.8 V
At that time, DELFLMAX: Maximum dif-
ference of sensor output for 12.3 sec-
onds; SUMFL: Integrated value of the
sensor output deviation for 12.3 seconds
The diagnosis counter does not count up when the following conditions are completed within 12.3 seconds.
Maximum value – minimum value of
change of tank pressure during 12.3 sec-
onds
Maximum value – minimum value of bat-
tery voltage during 12.3 seconds
Time Needed for Diagnosis: 12.3 seconds × 4 times
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in two continuous driving
cycles.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
DELFLMAX
SUMFL
At this point, DELFLMAX: maximum
deviation of sensor output for 12.3 sec-
onds
SUMFL: calculated value of sensor out-
put deviation for 12.3 seconds
5. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Threshold Value
≥ 4 times
≥ 0.05 kPa (0.375
mmHg, 0.02 inHg)
≥ 0.27 V
Threshold Value
< 0.228 V
< 21.8 V
GD(STI)-166