Subaru Legacy III (2000-2003 year). Service manual — part 345
EN(H6DO)-182
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
Value
Yes
No
1
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Another DTC is displayed.
Inspect the rele-
vant DTC using
“List of Diagnostic
Trouble Code
(DTC)”. <Ref. to
EN(H6DO)-89, List
of Diagnostic
Trouble Code
(DTC).>
NOTE:
In this case, it is
not necessary to
inspect DTC
P0153.
2
CHECK EXHAUST SYSTEM.
NOTE:
Check the following items.
• Loose installation of front portion of exhaust
pipe onto cylinder heads
• Loose connection between front exhaust pipe
and front catalytic converter (RH side)
• Damage of exhaust pipe resulting in a hole
Is there a fault in exhaust system?
There is a trouble.
Repair exhaust
system.
Replace front oxy-
gen (A/F) sensor.
<Ref. to
FU(H6DO)-43,
Front Oxygen (A/
F) Sensor.>
EN(H6DO)-183
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
MEMO:
EN(H6DO)-184
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AD:DTC P0154 — O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 2
SENSOR 1) —
• DTC DETECTING CONDITION:
• Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)-54, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)-47, OPERATION, Inspec-
tion Mode.>.
EN(H6DO)-185
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
• WIRING DIAGRAM:
EN-01087
BATTERY
F44
B61
SBF-5
6
B47
MAIN RELAY
1
2
3
5
4
6
9
8
21
31
2
1
5
B252
E49
ECM
18
29
19
5
4
7
6
20
30
4
1
3
FRONT
OXYGEN
(A/F)
SENSOR RH
E47
2
4
3
1
FRONT
OXYGEN
(A/F)
SENSOR LH
E24
B137
E3
B22
B83
11
8
1
2
3
E2
B21
2
3
E2
B21
20
19
E49
B252
4
8
LHD
RHD
LHD
RHD
B252
B47
3
4
5
6
1
2
E24
E47
B137
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
1 2 3 4
5 6 7 8
3
4
1
2
1 2 3 4
5 6 7 8
F44
B21
1 2
5
6 7
8
13
14 15
16
9 10
11 12
3 4
17 18
19 20
B83
1 2 3 4
5 6 7 8 9 10
11 12
19
20
13 14 15 16 17 18
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