Subaru IMPREZA GD 2007 Series Manual page 2186

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
Judgment Value
Pump supply pressure diagnosis
Judge as NG if Delivery pipe pressure does not rise though it should when the secondary air pump turns OFF
→ ON.
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
Secondary air delivery pipe pressure
(after barometric pressure compensa-
tion)
Time Needed for Diagnosis: 3 seconds
Combination valve closed pulse diagnosis
Calculate voltage pulse of the pump supply pipe pressure when the combination valve is closed. The calcu-
lation of delivery pipe pressure should be large when the combination valve is open. Judge that the combi-
nation valve is close stuck if the calculation is small.
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
Pulse calculation value when the combi-
nation valve is open
Time Needed for Diagnosis: 1 second
Combination valve change over pressure diagnosis
Delivery pipe pressure should vary when the combination valve turns open → closed. When the variation is
small, determine that the 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 change value at the combina-
tion valve changeover
Pressure change value at the combina-
tion valve changeover
Time Needed for Diagnosis: 0.5 seconds
Threshold Value
< 1 kPa (7 mmHg, 0.3 P0410
inHg)
Threshold Value
< Value from Map 1 P2441
P0411
Threshold Value
< Value from Map 2 P2441
> Value from Map 3 P0411
GD(STI)-119
GENERAL DESCRIPTION
DTC
DTC
DTC