Subaru Legacy IV (2008 year). Service manual — part 343
EN(H4DOTC)(diag)-193
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
BD:DTC P0411 SECONDARY AIR INJECTION SYSTEM INCORRECT FLOW
DETECTED
DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-101, DTC P0411 SECONDARY AIR INJECTION SYS-
TEM INCORRECT FLOW DETECTED, Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.
EN(H4DOTC)(diag)-194
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
WIRING DIAGRAM:
EN-05678
B47
1
2
4
6
3
5
SBF-7
E
F9
13
12
11
14
1
2
2
1
3
4
16
15
5
6
B143
F37
B144
B21
E2
E41
E40
B134
A:
B136
C:
F37
F11
B21
E40
B47
B144
F9
B143
F37
E41
1 2 3 4
12 13 14 15
5 6 7 8
16 17 18 19
9 10 11
20 21 22
23 24 25 26 27 28 29 30 31 32 33
35
34
37
36
39
38
41
40
43
42
44
45
47
46
49
48
51
50
53
52
54
MAIN
SBF
10A
60A
9
10
8
7
E
E
11
5
20
8
C30
C19
C8
A19
A27
A29
6
1
28
47
3
2
1
6
4
1
2
9
2
16
18
14
12
10
4
14
4
F11
1 2
3
4
1
2
5
6
1
3
4 5 6
2
B134
5
6
7
8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16 17
18 19 20 21
33 34
29
32
30 31
16
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
27
26
33 34 35
B136
1
5
7
6
2
8
3
4
9
1 2 3 4
5 6 7 8 9
10 11 12 13 14
15 16 17 18 19 20
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
5
6
3
1
2
9
10
12
11
13
14
4
7 8
15
16
46
MAIN RELAY
BATTERY
RELAY HOLDER
SECONDARY
AIR
COMBINATION
VALVE RELAY1
SECONDARY
AIR
COMBINATION
VALVE RELAY2
SECONDARY
AIR PUMP
RELAY
SECONDARY
AIR PUMP
MAIN FUSE
BOX (M/B)
ECM
SECONDARY AIR
COMBINATION VALVE RH
(WITH BUILT-IN PRESSURE SENSOR)
SECONDARY AIR
COMBINATION
VALVE LH
EN(H4DOTC)(diag)-195
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK SECONDARY AIR COMBINATION
VALVE.
Check the pipe between the secondary air com-
bination valve and cylinder head.
Is there damage or disconnec-
tion of the pipe?
Replace the pipe
between second-
ary air combination
valve and cylinder
head.
Go to step 2.
2
CHECK SECONDARY AIR COMBINATION
VALVE.
Race the engine at 2,000 rpm to check whether
or not the exhaust leak is heard.
Is there any exhaust leak?
Replace the pipe
between second-
ary air combination
valve and cylinder
head.
Repair the poor
contact of ECM
connector.
EN(H4DOTC)(diag)-196
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
BE:DTC P0413 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE “A“
CIRCUIT OPEN
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-102, DTC P0413 SECONDARY AIR INJECTION SYS-
TEM SWITCHING VALVE “A“ CIRCUIT OPEN, Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.
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