Subaru Legacy (2005 year). Service manual — part 142
EN(H4SO 2.0)(diag)-157
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AP:DTC P0512 STARTER REQUEST CIRCUIT
DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.
TROUBLE SYMPTOM:
Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4SO 2.0)(diag)-
38, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.0)(diag)-32, PRO-
CEDURE, Inspection Mode.>.
EN(H4SO 2.0)(diag)-158
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
WIRING DIAGRAM:
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN IGNITION
SWITCH AND ECM.
1) Disconnect the connector from ECM.
2) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B135) No. 23 (+) — Chassis ground (
−
):
Is the voltage more than 10 V? Repair the battery
short circuit of har-
ness between igni-
tion switch and
ECM.
Repair the poor
contact in ECM.
EN-03471
B225
10
11 12
13
14
15 16
17
18
19 20
21
22
23 24
25
26
27 28
29
30
31 32
33
34
35 36
39 40
37
38
1
2
9
3
4
5
6
7
8
B12
1 2 3 4
5 6 7 8
9 10 11 12
B25
1 2
1 2 3 4
5 6 7 8
B83
B122
T7
1 2 3 4 5 6
7 8 9 10 11 12
B135
1
2
7
8 9
5
6
3
4
10 11 12
19
20 21
29 30 31
13 14 15 16 17
27
28
18
22 23
24 25
26
32 33
34 35
B21
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
B72
1
3
4 5 6
2
23
ECM
B135
B14
M
STARTER MOTOR
E
12
12
B12
T3
T7
P
N
7
11
AT
AT
MT
MT
No.21
MAIN SBF
SBF-6
E
B72
2
3
BATTERY
IGNITION
SWITCH
B225
16
14
16
14
STARTER
RELAY
15
13
15
13
LHD
RHD
LHD
RHD
MT
12
B21
E2
E
36
NEUTRAL
POSITION
SWITCH
1
B25
T2
T2
B25
2
*
B83
B122 : LHD
: RHD
JOINT
CONNECTOR
*
B21
E2
35
*
: TERMINAL No. RANDOM
ARRANGEMENT
EN(H4SO 2.0)(diag)-159
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AQ:DTC P0519 IDLE AIR CONTROL SYSTEM PERFORMANCE
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Engine keeps running at higher speed than specified idle speed.
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4SO 2.0)(diag)-
38, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.0)(diag)-32, PRO-
CEDURE, Inspection Mode.>.
AR:DTC P0600 SERIAL COMMUNICATION LINK
NOTE:
For the diagnostic procedure, refer to LAN section. <Ref. to LAN(diag)-2, Basic Diagnostic Procedure.>
Step
Check
Yes
No
1
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Check DTC using
“List of Diagnostic
Trouble Code
(DTC)”. <Ref. to
EN(H4SO
2.0)(diag)-64, List
of Diagnostic Trou-
ble Code (DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0519.
2
CHECK AIR INTAKE SYSTEM.
1) Turn the ignition switch to ON.
2) Start and idle the engine.
3) Check the following items.
• Loose installation of intake manifold and
throttle body
• Cracks of intake manifold gasket and throttle
body gasket
• Disconnections of vacuum hoses
Is there any fault in air intake
system?
Repair air suction
and leaks.
3
CHECK ELECTRONIC THROTTLE CON-
TROL.
1) Turn the ignition switch to OFF.
2) Remove the electronic throttle control.
3) Check the electronic throttle control.
Are foreign matters found
inside the electronic throttle
control?
Remove foreign
matters from the
electronic throttle
control.
Perform the diag-
nosis of DTC
P2101.
EN(H4SO 2.0)(diag)-160
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AS:DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY
(RAM) ERROR
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
• Engine does not start.
• Engine stalls.
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4SO 2.0)(diag)-
38, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.0)(diag)-32, PRO-
CEDURE, Inspection Mode.>.
WIRING DIAGRAM:
EN-03507
BATTERY
IGNITION
SWITCH
MAIN RELAY
SBF-6
MAIN SBF
SBF-7
B72
C4
C3
B14
B5
C6
B6
C1
C2
A7
C5
C7
B13
No.12
B47
E2
B21
2
1
4
6
5
3
ECM
E
E
3
6
B134
B135
A:
D: B137
B:
D1
52
37
36
34
3
4
1
2
5
6
B47
No.13
A2
35
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
B135
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
29 30 31
32 33
34 35
B137
5
6
7
8
2
1
9
4
3
10
22 23
11 12 13 14 15
24 25
26
16 17
18 19 20 21
27
28 29
30 31
B21
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
B72
1
3
4 5 6
2
A:
B:
D:
B136
C:
B136
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
35
C:
SBF-5
TO OXYGEN SENSOR
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