Subaru 2006 Legacy, Manual

Page: 2051 / 4302

GD(H4DOTC)-129
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
Mode D: (Calculate the amount of negative pressure change)
Monitor the tank pressure in mode D, calculate (P2) the pressure change in the tank, and measure the time
(evpdset) for the tank pressure to return when calculation of P2 is completed. Shift to mode E when pressure
returns. Make an advance OK judgment using the value of P2, or cancel, when the pressure in the tank does
not return after calculation of P2 is completed even when the predetermined amount of time has passed.
When the following conditions are established, judged as OK.
Mode E: (Evaporation occurrence amount calculation)
Calculate the change of tank pressure with the time evpdset to judge as NG/OK according to the value of P1.
(ambiguous determination acceptable).
Abnormality Judgment
When the following conditions are established, judged as NG.
Judgment Value
Malfunction Criteria Threshold Value DTC
Advanced OK judgment 1 P0456
When in Mode D ≥ 30 s
Tank pressure
≤
–1.8 kPa (–13.5
mmHg, –0.53 inHg)
Advanced OK judgment 2
When in Mode D
≥
200 s
P2
≥
0.9 — 1.3 kPa (7 —
9.6 mmHg, 0.28 — 0.38
inHg)
Judgment Value
Malfunction Criteria Threshold Value DTC
P1 <Value of Map 7
* Threshold value: Fig-
ure (Residual Fuel
Amount vs evpdset) P0456
Map7 Failure diagnosis reference limit for 0.02 in leaks for evaporative emission control system di-
agnosis
Time evpdset & Fuel level 0 seconds 30 seconds 50 seconds 100 seconds 160 seconds 200 seconds
10 L (2.6 US gal, 2.2 Imp gal)
0 kPa (0
mmHg, 0
inHg)
0.07 kPa (0.5
mmHg,
0.020 inHg)
0.23 kPa (1.7
mmHg,
0.067 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
20 L (5.3 US gal, 4.4 Imp gal)
0 kPa (0
mmHg, 0
inHg)
0.07 kPa (0.5
mmHg,
0.020 inHg)
0.23 kPa (1.7
mmHg,
0.067 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
30 L (7.9 US gal, 6.6 Imp gal)
0 kPa (0
mmHg, 0
inHg)
0.07 kPa (0.5
mmHg,
0.020 inHg)
0.23 kPa (1.7
mmHg,
0.067 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
0.36 kPa (2.7
mmHg,
0.106 inHg)
40 L (10.6 US gal, 8.8 Imp gal)
0 kPa (0
mmHg, 0
inHg)
0.07 kPa (0.5
mmHg,
0.020 inHg)
0.25 kPa
(1.85 mmHg,
0.073 inHg)
0.33 kPa (2.5
mmHg,
0.098 inHg)
0.33 kPa (2.5
mmHg,
0.098 inHg)
0.33 kPa (2.5
mmHg,
0.098 inHg)
50 L (13.2 US gal, 11.0 Imp gal)
0 kPa (0
mmHg, 0
inHg)
0.07 kPa (0.5
mmHg,
0.020 inHg)
0.27 kPa (2.0
mmHg,
0.079 inHg)
0.31 kPa (2.3
mmHg,
0.091 inHg)
0.31 kPa (2.3
mmHg,
0.091 inHg)
0 kPa (0
mmHg, 0
inHg)
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