Subaru 2009 IMPREZA Service Manual page 891

Diagnostic Trouble Code (DTC) Detecting Criteria
5. DIAGNOSTIC METHOD
• Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgement Value
Malfunction Criteria
Fuel tank pressure
Time Needed for Diagnosis: 3000 s
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
Judgement Value
Malfunction Criteria
Fuel tank pressure
Cumulative time when all the malfunction
criteria below are met.
Purge control solenoid valve duty
Fuel temperature
Intake manifold relative pressure
Time Needed for Diagnosis: Less than 1 second
Threshold Value
–4 kPa
(–30 mmHg, –1.2 inHg)
Threshold Value
> –4 kPa
(–30 mmHg, –1.2 inHg)
30000 s
Not = 0
–10 °C (14 °F) — 70 °C
(158 °F)
–26.7 kPa (–200 mmHg,
–7.9 inHg)
GD(H4SO)-167
GENERAL DESCRIPTION