Subaru Legacy IV (2008 year). Service manual — part 360
EN(H4DOTC)(diag)-261
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CR:DTC P1410 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE
STUCK OPEN
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-174, DTC P1410 SECONDARY AIR INJECTION SYS-
TEM SWITCHING VALVE STUCK 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.>.
EN(H4DOTC)(diag)-262
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)-263
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK SECONDARY AIR COMBINATION
VALVE.
1) Remove the secondary air combination
valve. <Ref. to EC(H4DOTC)-22, Secondary Air
Combination Valve.>
2) Blow air from the secondary air combination
valve air inlet, and check whether there are
leaks at the pipe connections.
Are there air leaks from the pipe
connections?
Replace the sec-
ondary air combi-
nation valve on the
side with the air
leak. <Ref. to
EC(H4DOTC)-22,
Secondary Air
Combination
Valve.>
Even if DTC is
detected, the cir-
cuit has returned to
a normal condition
at this time. Repro-
duce the failure,
and then perform
the diagnosis
again.
NOTE:
In this case, tem-
porary poor con-
tact of connector
may be the cause.
EN(H4DOTC)(diag)-264
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CS:DTC P1418 SECONDARY AIR INJECTION SYSTEM CONTROL “A“ CIRCUIT
SHORTED
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-176, DTC P1418 SECONDARY AIR INJECTION SYS-
TEM CONTROL “A“ CIRCUIT SHORTED, 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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