Subaru IMPREZA GD 2007 Series Manual page 1910

asieps_tobira_IM_US.book 119 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Trouble Code (DTC) Detecting Criteria
Combination valve change over pressure diagnosis
Delivery pipe pressure should vary when the LH combination valve turns open → closed. When the variation
is small, determine that the LH combination valve is stuck closed.
Judge as NG when the following conditions are established. Judge as OK and clear the NG when the follow-
ing conditions are not established.
Malfunction Criteria
Pressure variation value when the LH
combination valve is switched
Delivery pipe pressure should vary when the RH combination valve turns closed → open. When the variation
is small, determine that the RH combination valve is stuck closed.
Judge as NG when the following conditions are established. Judge as OK and clear the NG when the follow-
ing conditions are not established.
Malfunction Criteria
Pressure variation value when the RH
combination valve is switched
Overflow diagnosis
Judge as secondary air system flow abnormality either if there is excessive secondary air flow amount with
the RH combination valve closed, or if there is excessive secondary air flow amount with the LH combination
valve closed.
Malfunction Criteria
Air flow amount when the right bank is
closed (value from Map 4)
or
Air flow amount when the left bank is
closed (value from Map 5)
Voltage at PORL measurement – Volt-
age at POR measurement
Voltage at PORL measurement – Volt-
age at POL measurement
PORL: Both banks all closed pressure
PORL: Both banks all closed pressure
POL: Left bank all closed pressure
Map 1
Engine speed (rpm)
Amount of intake air (g (oz)/s)
15 (0.53)
20 (0.71)
25 (0.88)
30 (1.06)
35 (1.23)
Map 2
Engine speed (rpm)
Amount of intake air (g (oz)/s)
15 (0.53)
20 (0.71)
25 (0.88)
30 (1.06)
35 (1.23)
Threshold Value
< Value from Map 6 P2443
Threshold Value
< Value from Map 7 P2441
Threshold Value
> Value from Map 8 P0411
> Value from Map 9
≤ 4 V
≤ 4 V
1000 1500 2000 2100
2 2 2 1.04
2 2 2 1.04
2 2 2 1.04
1.04 2 1.6 1.04
1.04 1.8 1.3 1.04
1000 1500 2000 2100
2 2 2 1.04
2 2 2 1.04
2 2 2 1.04
1.04 1.04 1.04 1.04
1.04 1.04 1.04 1.04
GD(H4DOTC)-119
GENERAL DESCRIPTION
DTC
DTC
DTC
4000
1.04
1.04
1.04
1.04
1.04
(V)
4000
1.04
1.04
1.04
1.04
1.04
(V)