Subaru 2009 IMPREZA Service Manual page 1727

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
Fuel temperature
Barometric pressure
Time Needed for Diagnosis: 15000 ms
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
Time Needed for Diagnosis: Less than 1 second
BR:DTC P0456 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED
(VERY SMALL LEAK)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0442. <Ref. to GD(H4DOTC)-114, DTC P0442 EVAPORATIVE
EMISSION CONTROL SYSTEM LEAK DETECTED (SMALL LEAK), Diagnostic Trouble Code (DTC) De-
tecting Criteria.>
BS:DTC P0457 EVAPORATIVE EMISSION CONTROL SYSTEM LEAK DETECTED
(FUEL CAP LOOSE/OFF)
1. OUTLINE OF DIAGNOSIS
NOTE:
For the detection standard, refer to DTC P0442. <Ref. to GD(H4DOTC)-114, DTC P0442 EVAPORATIVE
EMISSION CONTROL SYSTEM LEAK DETECTED (SMALL LEAK), Diagnostic Trouble Code (DTC) De-
tecting Criteria.>
Threshold Value
7.9 kPa (59.6 mmHg,
2.3 inHg)
< 35 °C (95 °F)
75 kPa (563 mmHg,
22.2 inHg)
Threshold Value
< 7.9 kPa
(59.6 mmHg, 2.3 inHg)
GD(H4DOTC)-139
GENERAL DESCRIPTION