Subaru 2009 IMPREZA, Service Manual

Page: 1709 / 3619

GD(H4DOTC)-121
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
0.02-inch Diagnosis
4. GENERAL DRIVING CYCLE
0.04-inch Diagnosis
• Perform the diagnosis only once in 856 seconds or more after starting the engine, at a constant speed of
32 km/h (20 MPH) or more.
• Pay attention to the fuel temperature and fuel level.
0.02-inch Diagnosis
• Perform the diagnosis 125 seconds or more at a constant engine speed of 50 km/h (31 MPH) or higher to
judge as NG or OK.
• If judgement cannot be made, repeat the diagnosis.
• Pay attention to the fuel level.
Secondary Parameters Enable Condition
At starting a diagnosis
Evap. diagnosis Incomplete
Battery voltage
t
10.9 V
Barometric pressure
t
75 kPa (563 mmHg, 22.2 inHg)
Time since last incomplete 0.02-inch leakage
diagnosis
When cancelling in mode A > 120000 ms
When cancelling in other than mode A > 600000 ms
Total time of canister purge operation
t
120000 ms
Elapsed time after starting the engine
t
120 s
Fuel temperature –10 °C (14 °F) — 55 °C (131 °F)
Fuel level 9.6 2 (2.54 US gal, 2.11 Imp gal) — 54.4 2 (14.37 US gal,
11.97 Imp gal)
Intake manifold relative vacuum (relative pres-
sure)
t
– 13.3 kPa (– 100 mmHg, – 3.9 inHg)
Fuel tank pressure –0.7 kPa (–5 mmHg, –0.2 inHg) — 1.4 kPa
(10.7 mmHg, 0.4 inHg)
Vehicle speed 50 km/h (31.1 MPH) — 510 km/h (316.9 MPH) continues
for 125000 ms
Closed air/fuel ratio control In operation
Engine speed 1050 rpm — 6000 rpm
During diagnosis
Change of fuel level
d
Value of Map 4
Pressure change every one second < 0.1 kPa (0.44 mmHg, 0 inHg)
Minimum pressure change value every one sec-
ond – Maximum pressure change value every
one second < 0.1 kPa (0.51 mmHg, 0 inHg) (Mode D)
| Pressure change in tank every second |
d
0.1 kPa (0.75 mmHg, 0 inHg)
Barometric pressure change –0.5 kPa (–3.6 mmHg, –0.1 inHg) — 0.3 kPa (2.4 mmHg,
0.1 inHg) (Mode D)
–0.3 kPa (–2.4 mmHg, –0.1 inHg) — 0.3 kPa (2.4 mmHg,
0.1 inHg) (Mode E)
Map4
Fuel level (
2
, US gal, Imp gal) 0
10, 2.64,
2.2
20, 5.28,
4.4
30, 7.93,
6.6
40, 10.57,
8.8
50, 13.21,
11
60, 15.85,
13.2
Change ( 2 , US gal, Imp gal) 5, 1.32, 1.1 5, 1.32, 1.1 5, 1.32, 1.1 5, 1.32, 1.1 5, 1.32, 1.1 5, 1.32, 1.1 5, 1.32, 1.1