Subaru 2009 IMPREZA Service Manual page 792

Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
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 level
Elapsed time after starting the engine
Engine coolant temperature – Engine
coolant temperature at engine start
Fuel temperature – Engine coolant tem-
perature
Battery voltage
Time Needed for Diagnosis: 120 s
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• 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 level
Elapsed time after starting the engine
Engine coolant temperature – Engine
coolant temperature at engine start
Fuel temperature – Engine coolant tem-
perature
Battery voltage
Engine coolant temperature
Time Needed for Diagnosis: Less than 1 second
6. ENABLE CONDITION
Stuck Diagnosis
Secondary Parameters
Elapsed time after starting the engine
Battery voltage
7. GENERAL DRIVING CYCLE
Always perform diagnosis after 20 seconds have passed since the engine started.
Threshold Value
9.6 2 (2.54 US gal,
2.11 Imp gal)
20 s
> 10 °C (50 °F)
10 °C (50 °F)
10.9 V
Threshold Value
9.6 2 (2.54 US gal,
2.11 Imp gal)
20 s
> 10 °C (50 °F)
< 10 °C (50 °F)
10.9 V
< 75 °C (167 °F)
Enable Condition
20000 ms
10.9 V
GD(H4SO)-68