SUBARU LEGACY 1996 Service Owners Manual

2-7
[T11F0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

F
:
DTC
P0115

-
ENGINE
COOLANT
TEMPERATURE

SENSOR
CIRCUIT
MALFUNCTION
(TW)
-

WIRING
DIAGRAM
:

B84
B21
E2E8

ECM
2-Q
FE

884

1
2u34
u
56
u
78
u

171819
20
2122
23242526272829
30

4546
47
484950
5152
53
54555657
71127314757671787980818283

4_Lr

B21

1234
5678

9
1
10
1
11
1
12
~

Engine
coolant
temperature
sensor

E8

12

82M0539

NOTE
:

For
the
diagnostic

ature
sensor
circuit

[T10F0]*2
.

procedure
on
engine
coolant
temper-

malfunction
(DTC
P0115),
refer
to
2-7

80

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T11GOj
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

G
:
DTC
P0120

-
THROTTLE
POSITION
SENSOR
CIRCUIT

MALFUNCTION
(THV)
-

WIRING
DIAGRAM
:

B84

B21
E2
E13

Throttle
ECM
-21
position
sensor

B84
821
E13

12u34
u
56
u
78
u

171819
20
2122
2324
25
26
2728
29
30
45
1
46
1
47
1
48
1
49
1
50
5152
53545557
7172
73
7415
76
7778
79
808182
83

1234
5678
1
239
1
10
1
11
1
12

82M0540

NOTE
:

For
the
diagnostic

circuit
malfunction

procedure
on
throttle
position
sensor

(DTC
P0120),
refer
to
2-7
[T10G0]*2
.

81

2-7
[T11H0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

H
:
DTC
P0121

-
THROTTLE
POSITION
SENSOR
CIRCUIT

RANGE/PERFORMANCE
PROBLEM

(TN
-
R)
-

WIRING
DIAGRAM
:

B84

B21
E2

Throttle
ECM
2-1
position
624

io

sensor

B84
821
E13

12u34
u
56
u
78
u

171819
20
2122
23
2425
26
272829
30
4546474849
50
5152
5354
5556
57
71727314
7516
7778
79
80
8182
83

1234
5678

9
1
10
1
11
1
12
r
1
23

BMW

NOTE
:

For
the
diagnostic
procedure
on
throttle
position
sensor

circuit
range/performanceproblem
(DTC
P0121),
referto

2-7
[T10H0]*2
.

82

ON-BOARD
DIAGNOSTICS
II
SYSTEM
(T11,01
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

Engine
coolant
temperature
sensor

I
:
DTC
P0125

-
INSUFFICIENT
COOLANT
TEMPERATURE

FOR
CLOSED
LOOP
FUEL
CONTROL

(TW
-
CL)
-

WIRING
DIAGRAM
:

B84
B21
E2E8

ECM

B84
B21
ES

1
2u34
U
-1
5
[
6
f
U
78
u
F
5~
55
171819
20
2122
2324
1
25
1
262728
2930
45
1
46
1
47
1
48
1
49
1
50
5152
535455
5657
7172
73
747576
77
787980
8182
83

1234

5678
9
10
1112
12

B2M0539

NOTE
:

For
the
diagnostic
procedure
on
insufficient
coolanttem-

perature
for
closed
loop
fuel
control
(DTC
P0125),
referto

2-7
[T1010]*2
.

83

2-7
[T11J0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

J
:
DTC
P0130

-
FRONT
OXYGEN
SENSOR
CIRCUIT

MALFUNCTION
(F02
-
V)
-

WIRING
DIAGRAM
:

Main
rela
y
0
0

847

SBF-2

Front
oxygensensor
-_

E93
:
:--i

O
O
B!1818

uuuu
u
191101
u
1111121
u
u

T7682
37
431441
~
1
636466760
1
2
3
I
Pffl
INM016116=190
4
It

B2M0787

NOTE
:

For
the
diagnostic
procedure
on
front
oxygen
sensor
cir-

cuit
malfunction
(DTC
P0130),
referto
2-7
[T10J0]*2,

84

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T11
KOl
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

K
:
DTC
P0133

-
FRONT
OXYGEN
SENSOR
CIRCUIT
SLOW

RESPONSE
(F02
-
R)
-

WIRING
DIAGRAM
:

0

OO
B!7B18

1
uuuuu
o
u
t1t
u
13fuu15i6

775p2
P60
35
6673
41
"143
IT10121
D
6860
1
23
4
173-T-4-1

B2M0787

NOTE
:

For
the
diagnostic
procedure
on
front
oxygen
sensor
cir-

cuit
slow
response
(DTC
P0133),
referto
2-7
[T10K0)*2
.

85

2-7
[T11L0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
11
.
DiagnosticsChart
with
Trouble
Code

L
:
DTC
P0135

-
FRONT
OXYGEN
SENSOR
HEATER
CIRCUIT

MALFUNCTION
(F02H)
-

WIRING
DIAGRAM
:

Main
relay
0

0

-i
~
r

847

SBF-2

O
818
Front
oxygensensor
E
8

-
--------
-
--
--
--
--
--
-
--

ECM

OOE

O
e+~
s,a

u
U
15161
u
17181
uu
19
1101
u
I
u
131pu
44
X
234

M56

1
1819
21
342
2
23
g
8

7
L57
jjj%1
667
D
1213
1
/417517517
7
1181901610210631
1
6616
1011,
1
234

B2M0788

NOTE
:

Forthe
diagnostic
procedure
on
front
oxygen
sensor

heater
circuit
malfunction
(DTC
P0135),
refer
to
2-7

[T10L0)*2
.

86

ON-BOARD
DIAGNOSTICS
11
SYSTEM
Riinnoll
2-7

11
.
DiagnosticsChart
with
Trouble
Code

M
:
DTC
P0136

-
REAR
OXYGEN
SENSOR
CIRCUIT

MALFUNCTION
(R02
-
V)
-

WIRING
DIAGRAM
:

n

SBF-2

O
I
(
Rear
oxygenoxygen
sensor
~E
f
819
T5
T6
(
Rear
t
Cal
model)
=
I
~~
_
.r,
.ra~

ECM

819

1
u34
u
56
u
78
uu
910
u
11
1
12
1-
V
1314u1516
1
8
1191
20
1
21237734
1
424
3
44

8
0

Rear
0sensor
(Cal
.model
only)

O
847819

T6

1
234
P9
IS

B2M0789

NOTE
:

For
the
diagnostic
procedure
on
rear
oxygen
sensor
cir-

cuit
malfunction
(DTC
P0136),
referto
2-7
[T10M0]*2
.

87

2-7
[TI
1N0]
ON-BOARD
DIAGNOSTICS
11
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

N
:
DTC
P0139

-
REAR
OXYGEN
SENSOR
CIRCUIT
SLOW

RESPONSE
(R02
-
R)
-

WIRING
DIAGRAM
:

Main
re
0

B47

SBF-2

Rear
oxygen
sensor
O
B~9
O
T6
(Except
Cal
model)

--
-
-
-
-
--
-
-
---
-
-
-

ECM
~
---

Rear
oxygen
sensor
819
(Ca
l
.model
only)

40
O
8~7
B19

T6
1zu
u
111
>
>
1
1
2D
212
2317
425141
lablR
273412
1
2
7
81
7~
90
~
234
3
6
43
u

8

B2M0789

NOTE
:

For
the
diagnostic
procedure
on
rear
oxygen
sensor
cir-

cuit
slow
response
(DTC
P0139),
referto
2-7
[T10N0]*2
.

88

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[Ti1ooi
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

O
:
DTC
P0141

-
REAR
OXYGENSENSOR
HEATER
CIRCUIT

MALFUNCTION
(R02H)
-

WIRING
DIAGRAM
:

Main
rel
0
<-O
O
o

B47

SBF-2

Rear
oxygen
sensor
819
O
T6
<Except
Cal
model)

1-1
--

1991

ECM

Rearoxygensensor
(Cal
.model
only)

O
O
B47819

1
34
T6

9012
3
4
1234
5
6
43

B2M079U
I

NOTE
:

For
the
diagnostic
procedure
on
rear
oxygen
sensor

heater
circuit
malfunction
(DTC
P0141),
referto
2-7

[T1000]*2
.

89