Subaru Legacy IV (2008 year). Service manual — part 564
EN(H6DO)(diag)-229
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK POWER SUPPLY OF CAMSHAFT
POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the cam-
shaft position sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between camshaft
position sensor connector and engine ground.
Connector & terminal
(E73) No. 1 (+) — Engine ground (–):
Is the voltage 10 V or more?
Go to step 2.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit or
short circuit to
ground in harness
between main re-
lay connector and
camshaft position
sensor connector
• Poor contact of
coupling connector
2
CHECK HARNESS BETWEEN ECM AND
CAMSHAFT POSITION SENSOR CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance between the ECM
and camshaft position sensor connector.
Connector & terminal
(B134) No. 11 — (E73) No. 2:
(B134) No. 22 — (E73) No. 3:
Is the resistance less than 1
:? Go to step 3.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
the ECM and cam-
shaft position sen-
sor connector
• Poor contact of
coupling connector
3
CHECK HARNESS BETWEEN ECM AND
CAMSHAFT POSITION SENSOR CONNEC-
TOR.
Measure the resistance between camshaft
position sensor connector and engine ground.
Connector & terminal
(E73) No. 2 — Engine ground:
Is the resistance 1 M
: or
more?
Go to step 4.
Repair short cir-
cuit to ground in
harness between
ECM and camshaft
position sensor
connector.
4
CHECK HARNESS BETWEEN ECM AND
CAMSHAFT POSITION SENSOR CONNEC-
TOR.
Measure the voltage between camshaft posi-
tion sensor connector and engine ground.
Connector & terminal
(E73) No. 2 (+) — Engine ground (–):
Is the voltage 5 V or more?
Repair the short
circuit to power in
the harness
between ECM and
camshaft position
sensor connector.
Go to step 5.
5
CHECK CONDITION OF CAMSHAFT POSI-
TION SENSOR.
Is the camshaft position sensor
installation bolt tightened
securely?
Go to step 6.
Tighten the cam-
shaft position sen-
sor installation bolt
securely.
6
CHECK CAMSHAFT POSITION SENSOR.
Check the waveform of the camshaft position
sensor. <Ref. to EN(H6DO)(diag)-17, Engine
Control Module (ECM) I/O Signal.>
Is there any abnormality in
waveform?
Replace the cam-
shaft position sen-
sor. <Ref. to
FU(H6DO)-22,
Camshaft Position
Sensor.>
Repair the follow-
ing item.
• Poor contact in
ECM connector
• Poor contact of
camshaft position
sensor connector
• Poor contact of
coupling connector
EN(H6DO)(diag)-230
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CA:DTC P0345 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 2)
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H6DO)-102, DTC P0345 CAMSHAFT POSITION SENSOR “A”
CIRCUIT (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-52,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H6DO)(diag)-44, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
EN-06876
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
B47
1
2
4
6
3
5
E
E2
B21
3
22
SBF-7
E74
E1
B20
E73
1
3
11
2
1
ECM
B134
1
3
4
1
2
5
6
B20
E74
B47
1 2 3
B134
E73
BATTERY
MAIN RELAY
2
21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
2
6
48
B21
1 2 3 4 5 6 7 8 9 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
42
43
36
37
38
39
48
49
50
51
52
53
54
40
41
44
45
46
47
CAMSHAFT
POSITION
SENSOR LH
CAMSHAFT
POSITION
SENSOR RH
EN(H6DO)(diag)-231
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK POWER SUPPLY OF CAMSHAFT
POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the cam-
shaft position sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between camshaft
position sensor connector and engine ground.
Connector & terminal
(E74) No. 1 (+) — Engine ground (–):
Is the voltage 10 V or more?
Go to step 2.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit or
short circuit to
ground in harness
between main re-
lay connector and
camshaft position
sensor connector
• Poor contact of
coupling connector
2
CHECK HARNESS BETWEEN ECM AND
CAMSHAFT POSITION SENSOR CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance between the ECM
and camshaft position sensor connector.
Connector & terminal
(B134) No. 21 — (E74) No. 2:
(B134) No. 22 — (E74) No. 3:
Is the resistance less than 1
:? Go to step 3.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
the ECM and cam-
shaft position sen-
sor connector
• Poor contact of
coupling connector
3
CHECK HARNESS BETWEEN ECM AND
CAMSHAFT POSITION SENSOR CONNEC-
TOR.
Measure the resistance between camshaft
position sensor connector and engine ground.
Connector & terminal
(E74) No. 21 — Engine ground:
Is the resistance 1 M
: or
more?
Go to step 4.
Repair short cir-
cuit to ground in
harness between
ECM and camshaft
position sensor
connector.
4
CHECK HARNESS BETWEEN ECM AND
CAMSHAFT POSITION SENSOR CONNEC-
TOR.
Measure the voltage between camshaft posi-
tion sensor connector and engine ground.
Connector & terminal
(E74) No. 21 (+) — Engine ground (–):
Is the voltage 5 V or more?
Repair the short
circuit to power in
the harness
between ECM and
camshaft position
sensor connector.
Go to step 5.
5
CHECK CONDITION OF CAMSHAFT POSI-
TION SENSOR.
Is the camshaft position sensor
installation bolt tightened
securely?
Go to step 6.
Tighten the cam-
shaft position sen-
sor installation bolt
securely.
6
CHECK CAMSHAFT POSITION SENSOR.
Check the waveform of the camshaft position
sensor. <Ref. to EN(H6DO)(diag)-17, Engine
Control Module (ECM) I/O Signal.>
Is there any abnormality in
waveform?
Replace the cam-
shaft position sen-
sor. <Ref. to
FU(H6DO)-22,
Camshaft Position
Sensor.>
Repair the follow-
ing item.
• Poor contact in
ECM connector
• Poor contact of
camshaft position
sensor connector
• Poor contact of
coupling connector
EN(H6DO)(diag)-232
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CB:DTC P0400 EXHAUST GAS RECIRCULATION FLOW
DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H6DO)-103, DTC P0400 EXHAUST GAS RECIRCULATION
FLOW, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Movement performance problem when engine is low speed.
• Improper idling
• Movement performance problem
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-52,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H6DO)(diag)-44, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
E
B47
E18
2
5
1
4
3
6
B21
E2
E76
E77
48
3
4
7
6
SBF-7
B134
ECM
B47
3
4
1
2
5
6
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
B134
10
E76
E77
21
32
33
22
B21
E2
E18
1
3
4 5 6
2
1 2
3 4
5
6
7
8
9
10
E77
MAIN RELAY
BATTERY
EGR VALVE
6
4
9
10
8
20
EN-06877
B21
1 2 3 4 5 6 7 8 9 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
42
43
36
37
38
39
48
49
50
51
52
53
54
40
41
44
45
46
47
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