Subaru IMPREZA GD 2007 Series Manual page 2216

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Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG if the criteria below are met.
Judgment Value
Malfunction Criteria
Number of times the difference between
the Max. fuel level and the Min. fuel level
every 60 seconds is 2 2 (0.53 US gal,
0.44 Imp gal) or more (with enable condi-
tion completed)
Maximum - Minimum Tank Pressure
(with enable condition completed)
Maximum - Minimum Fuel Temperature
(with enable condition completed)
If the maximum value – minimum value for the fuel level every 60 seconds is less than 2 liters, extend 60 sec-
onds and make judgment with the maximum and minimum values for the fuel level in 120 seconds. If a dif-
ference does not appear though the time was extended 60 seconds, extend the time (180, 240, 300 seconds)
and continue the judgment. If the maximum value – minimum value for the fuel level is 2 2 or more, the di-
agnosis counter counts up.
Time Needed for Diagnosis: 1 second × 16 times or more
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
Maximum - minimum tank pressure
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
Purge control solenoid valve control: Purge fixed mode is prohibited.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Threshold Value
≥ 16 times
< 0.05 kPa (0.375
mmHg, 0.02 inHg)
≥ 7°C (44.6°F)
Threshold Value
≥ 0.05 kPa (0.375
mmHg, 0.02 inHg)
GD(STI)-149
GENERAL DESCRIPTION