Subaru 2006 Legacy, Руководство пользователя

Страница: 1346 / 4302

GD(H4SO U5)-120
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
0.04-inch Diagnosis
Mode Table for Evaporative Emission Control System Diagnosis
Mode Mode Description Diagnosis Period
Mode Z
(Purge control solenoid valve opening
failure diagnosis)
Perform purge control solenoid valve opening failure diagnosis from
the size of tank pressure variation from diagnosis start.
3 — 16 seconds
Mode A
(Estimated evaporation amount)
Calculate the tank pressure change amount (P1). 10 seconds
Mode B
(Sealed negative pressure, large leak-
age judgment)
Decrease the pressure in the tank to the target value by introducing
the intake manifold pressure to the fuel tank.
If the tank pressure cannot be reduced, it is diagnosed as large leak.
5 — 25 seconds
Mode C
(Pressure increase check, advanced
OK judgment)
Wait until the tank pressure returns to the target (start level of P2
calculation). If the tank pressure does not become the value, make
advanced OK judgment.
1 — 15 seconds
Mode D
(Negative pressure variation measure-
ment, evaporation leakage diagnosis)
Calculate the tank pressure variation (P2), and obtain the diagnostic
value using P1 found in Mode A.
Perform the evaporation diagnosis using the diagnostic value.
10 seconds
Mode
Behavior of tank internal pressure under nor-
mal conditions
Diagnostic item DTC
Mode Z
Roughly the same as atmospheric pressure
(Same as 0 kPa (0 mmHg, 0 inHg)) Purge control solenoid valve is judged to be
open.
P0457
Mode A
Pressure is in proportion to amount of evap-
orative emission.
Mode B
Negative pressure is formed due to intake
manifold negative pressure
Large leak P0457
Mode C Reaches target pressure None
Mode D Pressure change is small.
EVAP system large leak determination. [1.0
mm (0.04 in)]
P0442
Mode
Z
Mode
A
Mode
B
Mode
C
Mode
D
OK OK OK OK OK
NG
Early OK
Large leakage judgement
Cancel
Mode
Z
Extend
NG
NG
OK
END
EN-02872
asieps_tobira.book 120 ページ ２００９年１０月２６日 月曜日 午前９時１６分