Subaru 2009 IMPREZA Service Manual page 829

Diagnostic Trouble Code (DTC) Detecting Criteria
Drain valve
Drain valve controls the ambient air to be introduced to the canister.
3. ENABLE CONDITIONS
0.04-inch Diagnosis
Secondary Parameters
Battery voltage
Barometric pressure
Total time of canister purge operation
Elapsed time after starting the engine
Learning value of evaporation gas density
Engine speed
Fuel tank pressure
Intake manifold relative vacuum (relative pres-
sure)
Vehicle speed
Fuel level
Closed air/fuel ratio control
Fuel temperature
Intake air temperature
Pressure change every one second
Minimum pressure change value every one sec-
ond – Maximum pressure change value every
one second
Change of fuel level per 128 milliseconds
Air fuel ratio
Enable Condition
10.9 V
75 kPa (563 mmHg, 22.2 inHg)
120000 ms
856 s
< 0.08
1050 rpm — 6000 rpm
–4 kPa (–30 mmHg, –1.2 inHg)
– 26.7 kPa (– 200 mmHg, – 7.9 inHg)
32 km/h (19.9 MPH)
9.6 2 (2.54 US gal, 2.11 Imp gal) — 54.4 2 (14.37 US gal,
11.97 Imp gal)
In operation
–10 °C (14 °F) — 45 °C (113 °F)
–10 °C (14 °F)
< 1.7 mmHg (Mode A)
< 1.7 mmHg (Mode D)
< 1.7 mmHg (Mode A)
< 1.7 mmHg (Mode D)
< 2 2 (0.53 US gal, 0.44 Imp gal)
0.76 — 1.25
GD(H4SO)-105
GENERAL DESCRIPTION
EN-02293