Subaru IMPREZA GD 2007 Series Manual page 1907

asieps_tobira_IM_US.book 116 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BC:DTC P0410 SECONDARY AIR INJECTION SYSTEM
1. OUTLINE OF DIAGNOSIS
Detect NG judging from secondary air delivery pipe pressure, pulse of secondary air delivery pipe pressure
and secondary air pipe airflow amount.
2. ENABLE CONDITION
Secondary Parameters
Estimate ambient temperature
Battery voltage
Atmospheric pressure
Engine
Pump supply pressure diagnosis
Amount of intake air
Secondary air pump
Combination valve
Combination valve one side closed pulse
diagnosis
Feasible area for diagnosis
After fuel cut
Combination valve both closed pulse
diagnosis
Engine load
After fuel cut
Combination valve change over pressure
diagnosis
Amount of intake air
Engine speed
After fuel cut
3. GENERAL DRIVING CYCLE
Perform diagnosis during secondary air pump operation
4. DIAGNOSTIC METHOD
Measure secondary air delivery pipe pressure, pulse of secondary air delivery pipe pressure and secondary
air pipe airflow amount.
Pump supply pressure diagnosis
Perform system function diagnosis by comparing the pressure when the secondary air pump is OFF and the
pressure increase when it is ON.
Combination valve one side closed pulse diagnosis
Perform close stuck diagnosis of the LH combination valve using delivery pipe pressure pulse when the RH
combination valve is closed.
Perform close stuck diagnosis of the RH combination valve using delivery pipe pressure pulse when the LH
combination valve is closed.
Combination valve both closed pulse diagnosis
Perform open stuck diagnosis of both combination valves using delivery pipe pressure pulse when both com-
bination valves are closed. Determine which side of valves is stuck open by comparing secondary air flow
amount when RH combination valve is closed with that when LH combination valve is closed.
Enable Conditions
4.4°C (39.92°F)
7 V
563 mmHg
In operation
≥ 2 g (0.07 oz)/second
Operating
One bank open
(except with both
banks closed)
≥ 1 (See Map 10)
≥ 500 milliseconds
≥ 0.2 g (0.007 oz)/rev
≥ 500 milliseconds
≥ 2 g (0.07 oz)/second
and
≤ 20 g (0.7 oz)/second
< 4000 rpm
≥ 500 milliseconds
GD(H4DOTC)-116