SUBARU LEGACY 1996 Service Repair Manual

2-7
[T11Po]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

P
:
DTC
P0170

-
FUEL
TRIM
MALFUNCTION
(FUEL)
-

NOTE
:

For
the
diagnostic

(DTC
P0170),
refer

procedure
on
fueltrim
malfunction

to
2-7
[T10P0]*2
.

90

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[TylTOi
2-7

11
.
DiagnosticsChart
with
Trouble
Code

Q
:
DTC
P0201

-
FUELINJECTOR
CIRCUIT
MALFUNCTION
-

#1
(INJ1)
-

R
:
DTC
P0202

-
FUELINJECTOR
CIRCUIT
MALFUNCTION
-

#2
(INJ2)
-

S
:
DTC
P0203

-
FUELINJECTOR
CIRCUIT
MALFUNCTION
-

#3
(INJ3)
-

T
:
DTC
P0204

-
FUELINJECTOR
CIRCUIT
MALFUNCTION
-

#4
(INJ4)
-

WIRING
DIAGRAM
:

Main
relay
0
0
0-
0

B47

SBF-2
(D
e
'-`
B22
E3E6
E17884
#3#4

E5
E16

ECM
#1
#2

B84B22B41
E5E6
E16
E17

1
U
131
U1
1
3132
6
2
9
1
40
1
4
11421
43
1
44
1

1
234
10
.1
0L718

P
1
58960
63
646B6
9
1011
12
1
14116
5
1~
B
41
3,

B2M0784

NOTE
:

Forthe
diagnostic
procedure
on
fuel
injector
circuit
mal-

function
-
#1
(DTC
P0201),
#2
(DTC
P0202),
#3
(DTC

P0203)
and
#4
(DTC
P0204),
refer
to
2-7
[T10Q0,
T10R0,

T10S0
and
T10T0]*2
.

91

2-7
[T11U0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

U
:
DTC
P0301

-
CYLINDER
1
MISFIRE
DETECTED

(MIS-1)
-

V
:
DTC
P0302

-
CYLINDER
2
MISFIRE
DETECTED

(MIS-2)
-

W
:
DTC
P0303

-
CYLINDER
3
MISFIRE
DETECTED

(MIS-3)
-

X
:
DTC
P0304

-
CYLINDER
4
MISFIRE
DETECTED

(MIS-4)
-

WIRING
DIAGRAM
:

Crankshaft
Camshaft
Main
rela
y
position
position
Mass
air
o
sensorsensor
flow
sensor
0

O
E10E15
O

B47
ECM
SBF-2

E8
B12
E13
E6
E17

#3
#4
77

Ll
-
t
:A

Engine
Neutral
Throttle
~
E16
coolant
positionposition
temperature
switch
sensor
#1#2
sensor

Fuel
injectors
1
4
10
111
1
14
1
1
1I181920
2122
23
24
25262728
29
3132
33
34353637
3940
4142
4344454647484950
5152
53545556575859
1
60
61
1
62
1
63
1
64
1
65
1
66
1
6L/
1
698
9
0
I
1111721
1741
51761771781191801811827831
8485
861$7
888990
9192
9394951961
I

B22E10E15

O
O
B12E13
B41
Efi
EI7

1234
1
2
5678
~
Et6
5678
_3
1
ill
1
2345
9101112
1
23
56
13141516
1
2
82M0791

NOTE
:

For
the
diagnostic
procedure
on
cylinder
misfire
detected

-
#1
(DTC
P0301),
#2
(DTC
P0302),
#3
(DTC
P0303)
and
#4
(DTC
P0304),
referto
2-7
[T10U0,
T10V0,
T10W0
and

T10X0]*2
.

92

ON-BOARD
DIAGNOSTICS
II
SYSTEM
Riivol
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

Y
:
DTC
P0325

-
KNOCK
SENSOR
CIRCUIT
MALFUNCTION

(KNOCK)
-

WIRING
DIAGRAM
:

B84
B21
E2
E14

-------------------------
7
------------------
--
41-=

ECM

6
41
7

Knock
sensor

B84

1
2
345678

171819
20
2122
2324
2526
27282930

4546
4148
4950
5152
535455
1
5657

71727314157677781980818283

B83
B21E14

1234

5678
0

1
234
1
9
1
10
1
11
1
12
[l

B2M0559

NOTE
:

For
the
diagnostic
procedure
on
knock
sensor
circuit
mal-

function
(DTC
P0325),
refer
to
2-7
[T10Y0]*2
.

93

2-7
[T11Z0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

Z
:
DTC
P0335

-
CRANKSHAFT
POSITION
SENSOR
CIRCUIT

MALFUNCTION
(CRANK)
-

WIRING
DIAGRAM
:

884
B20

ECM
~'--------

Et

E10

Crankshaft
position
sensor

O

Crankshaft
sprocket

E84

1
2
345678

1
181920
21
2223
24
26
1
27
28
29
130

45
1
46
1
47
1
4
81
49
5
0
1
5
11
5
2
15
3
1
54

5

5556
57

71
1
72
1
73
1
74
1
7576
1
77
1
78
1
79
1
80
81
8283
u

B20

123

456

E10

12

B2M0529

NOTE
:

Forthe
diagnostic
procedure
on
crankshaft
position
sen-
sor
circuit
malfunction
(DTC
P0335),
referto
2-7

[T10Z0]*2
.

94

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T11
AAO]
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

AA
:
DTC
P0340

-
CAMSHAFT
POSITION
SENSOR
CIRCUIT

MALFUNCTION
(CAM)
-

WIRING
DIAGRAM
:

B84

B20
Ei

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

ECM
--------
L-C~
------

E15
Camshaft
pulley

Camshaft
position
sensor

B20
E15
75
1

17181920
2122
23

45
4647484950
5152
535455
556
123

77
1
78
1
79
1
80
1
8182
456

B84

2u34u
6u
su

4252627282930

1
4
7
83

B2M0530

NOTE
:

For
the
diagnostic
procedure
on
camshaft
position
sensor

malfunction
(DTC
P0340),
refer
to
2-7
(T10AA0)*2
.

95

2-7
[T11AB0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

AB
:
DTC
P0400

-
EXHAUST
GAS
RECIRCULATION
FLOW

MALFUNCTION
(EGR)
-

WIRING
DIAGRAM
:

Main
relay
0
0

7
SBF-2
C1_
.O

ECM
-

E
Q
e

solenoid
i
81
m
O'
O
E18
valve
.--I

PressurePressure
sources
sensor
switchinsolenoid
g
ve
Ive
BPTEGR
valve

O
821
O
Bi
841
O
EI8

u
u
lblbl
u
71131
uu
1119M6
6
99076
4
1
u
1234
56
8
N
~
~
2
M
~
~
101112
9101112
T
~
(
T
56
T
l
13141
16

82M0792

NOTE
:

For
the
diagnostic
procedure
on
exhaust
gas
recirculation

flow
malfunction
(DTC
P0400),
referto
2-7
[T10AB0]*2
.

96

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

11
.
Diagnostics
Chart
with
Trouble
Code

AC
:
DTC
P0403

-
EXHAUST
GAS
RECIRCULATION
CIRCUIT

MALFUNCTION
(EGRSOL)
-

WIRING
DIAGRAM
:

Main
rely
0
0

-1
r

B47

SBF-2

ECM
E
0
-0-

EGR
solenoid
Ef8
valve

BPT
'
EGR
valve

O
B21
817
O
EI8

U
VUuUUuu
1234
17
7
1234
1
26
8

9
0
112
Of18
6
3111516

B2M0793

NOTE
:

For
the
diagnostic
procedure
on
exhaust
gas
recirculation

circuit
malfunction
(DTC
P0403),
referto
2-7
[T10AC0]*2
.

97

2-7
[T11AD0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

B41

Main
rel
0
r-0
O
o

B84

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

ECM
----------
--~
I

883

B84

AD
:
DTC
P0420

-
CATALYST
SYSTEM
EFFICIENCY
BELOW

THRESHOLD(CAT)
-

WIRING
DIAGRAM
:

I'Il

818

Front
oxygen
sensor

1
46
81
.-f
-U
1
9
1
10
1
U
1112
U
1314U1516
171819
20
2122
128
2930
3132
3314
1
35
1
36
1
37
3839
404142
4344
45447
48
429
1
5L0
5125210
45556
5758
59
60b1
1
62
1
63
1
64
1
65
1
66
1
6/
1
68
1
6910
1
2
4
6
B
19
80818283485
B687
8889909192
9394
9596

O
I'
II
819
O
I`t'I
O

819
~
~
T6

!l

?
Rear
oxygen

ox
yg
en
sensor
(Ex(Except
Cal
.model)
sensor
(Ca
I
.mode
I
only)
883847B18
T6

B19

2121
~
43
1
234
56
10
V

B2M0794

NOTE
:

For
the
diagnostic
procedure
on
catalyst
system
efficiency

below
threshold
(DTC
P0420),
referto
2-7
[T10AD0J*2
.

98

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T11AE0]
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

AE
:
DTC
P0441

-
EVAPORATIVE
EMISSION
CONTROL

SYSTEM
INCORRECT
PURGE
FLOW

(CPC
-
F)

WIRING
DIAGRAM
:

Main
relay
0

0

B47

SBF-2

w

E
Pu7rg
e

ECM
-~
confrol
solenoid
valve

884
B22
847
E4

1
3456
1234
L7
819D2122239252627282930
5
96
1$34
1
2
13141516
5
6
B2M0795

NOTE
:

For
the
diagnostic
procedure
on
evaporative
emission

control
system
incorrect
purge
flow
(DTC
P0441),
referto

2-7
[T10AE0]*2
.

99