Subaru Legacy (2005 year). Service manual — part 131
EN(H4SO 2.0)(diag)-113
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
S: DTC P0134 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SEN-
SOR 1)
DTC DETECTING CONDITION:
Immediately at fault recognition
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-03475
3
4
1
2
5
6
B47
SBF-5
E
B47
E24
5
3
4
6
2
1
C34
C35
C33
B3
B2
B1
B135
E
B5
B6
52
B21
E2
B21
E2
50
51
3
4
E2
B21
E
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
E24
ECM
BATTERY
FRONT OXYGEN
(A/F) SENSOR
MAIN RELAY
B136
B:
C:
1
2
3
4
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
B:
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:
E24
3
2
*
1
*
*
3
LHD : 4
RHD : 1
*
1
*
*
2
3
3
1
6 5 4
2
: RHD
: LHD
LHD : 1
RHD : 4
LHD : 2
RHD : 6
EN(H4SO 2.0)(diag)-114
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN ECM AND
FRONT OXYGEN (A/F) SENSOR CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
front oxygen (A/F) sensor connector.
3) Measure the resistance of harness
between ECM and front oxygen (A/F) sensor
connector.
Connector & terminal
LHD model
(B136) No. 33 — (E24) No. 1:
(B136) No. 35 — (E24) No. 2:
RHD model
(B136) No. 33 — (E24) No. 4:
(B136) No. 35 — (E24) No. 6:
Is the resistance less than 1
Ω?
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and front
oxygen (A/F) sen-
sor connector
• Poor contact in
front oxygen (A/F)
sensor connector
• Poor contact in
ECM connector
2
CHECK POOR CONTACT.
Check poor contact in front oxygen (A/F) sen-
sor connector.
Is there poor contact in front
oxygen (A/F) sensor connec-
tor?
Repair the poor
contact in front
oxygen (A/F) sen-
sor connector.
Replace the front
oxygen (A/F) sen-
sor. <Ref. to
FU(H4SO 2.0)-32,
Front Oxygen (A/
F) Sensor.>
EN(H4SO 2.0)(diag)-115
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
T: DTC P0137 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2)
DTC DETECTING CONDITION:
Detects when malfunction occurs in 2 continuous driving cycles.
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-03476
B47
T5
3
4
5
6
1
2
1 2
3 4
BATTERY
B47
MAIN RELAY
1
2
4
6
3
5
A1
C19
C18
C30
B5
B6
REAR
OXYGEN SENSOR
ECM
1
4
3
2
52
B21
T5
E2
1
B135
B:
SBF-5
C: B136
E
E
A: B134
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
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
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
A:
B:
C:
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
1 2 3 4
5 6 7 8
B138
B83
1
T5
B19
2
2
B19
B83
B138
:LHD
:RHD
*
*
*
*
1
*
: TERMINAL No. RANDOM
ARRANGEMENT AMONG
1,2,5, AND 6
2
*
: TERMINAL No. RANDOM
ARRANGEMENT AMONG
3,4,7, AND 8
EN(H4SO 2.0)(diag)-116
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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
P0137.
2
CHECK REAR OXYGEN SENSOR DATA.
1) Warm-up the engine until engine coolant
temperature is above 70
°C (158°F), and keep
the engine speed at 5,000 rpm.
2) Read the data of rear oxygen sensor signal
using Subaru Select Monitor or general scan
tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4SO 2.0)(diag)-25, Subaru Select
Monitor.>
• General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Is the voltage more than 490
mV?
3
CHECK HARNESS BETWEEN ECM AND
REAR OXYGEN SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
rear oxygen sensor.
3) Measure the resistance of harness
between ECM and rear oxygen sensor con-
nector.
Connector & terminal
(B136) No. 19 — (B19) No. 4:
(B136) No. 18 — (B19) No. 3:
Is the resistance more than 3
Ω?
Repair the open
circuit of harness
between ECM and
rear oxygen sen-
sor connector.
4
CHECK HARNESS BETWEEN REAR OXY-
GEN SENSOR AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from rear oxygen
sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between rear oxygen
sensor harness connector and chassis ground.
Connector & terminal
(B19) No. 4 (+) — Chassis ground (
−
):
Is the voltage 0.2 — 0.5 V?
Replace the rear
oxygen sensor.
<Ref. to FU(H4SO
2.0)-33, Rear Oxy-
gen Sensor.>
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
rear oxygen sen-
sor and ECM con-
nector
• Poor contact in
rear oxygen sen-
sor connector
• Poor contact in
ECM connector
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст