diagram SUBARU LEGACY 1996 Service User Guide

ON-BOARD
DIAGNOSTICS
II
SYSTEM
(78D0]
2-7

8
.
Diagnostics
for
CHECK
ENGINE
Malfunction
Indicator
Lamp
(MIL)

D
:
CHECK
ENGINE
MALFUNCTION

INDICATOR
LAMP
(MIL)
REMAINS
BLINKING

AT
A
CYCLE
OF
3
Hz
.

WIRING
DIAGRAM
:

Combination
meter

i14

B84
Ignition
B37
('52)
switch
No
.
15
ECM

B75
B76822
E3

E
815876
i2
i14
822

910
1112
13141516
1
4
31
2333435
36
1
37
1
3839
1
1040
43
44
56
W7
11
585960
6162
63
64
6566
619
70
~
1~
1
234689
10
1
4858687888990
9192
93949596
IJ
11
1213141516171819
20
2122
11
1
2
1
3
1
4
1
5
1
6
1
78
9
10111213

B2M0511

NOTE
:

For
the
diagnostic
procedure
on
indicator
lamp
(MIL)

remains
blinking
at
a
cycle
of
3
Hz,
referto
2-7
[T7D0]*2
.

61

2-7
[rseo1
ON-BOARD
DIAGNOSTICS
II
SYSTEM
9
.
Diagnostics
for
Engine
Starting
Failure

9
.
Diagnostics
for
Engine
Starting

Failure

B
:
STARTER
MOTOR
CIRCUIT

WIRING
DIAGRAM
:

B2M0830

NOTE
:

For
the
diagnostic
procedure
on
starter
motor
circuit,
refer

to
2-7
[T8B0]*2
.

62

O
Bit

6
135
2
1103
4
R121363113al
131,
414
4470
10111

ON-BOARD
DIAGNOSTICS
II
SYSTEM
trscoi
2-7

9
.
Diagnostics
for
Engine
Starting
Failure

C
:
CONTROL
MODULE
POWER
SUPPLY
AND

GROUND
LINE

WIRING
DIAGRAM
:

Main
relay

0
0

B47
To
idle
air
control
solenoid
valve,purge
control
SBF-2
solenoid
valve
etc
.

B84

ECM

B22
O
E
L1

O
B47
B22

1234
24252627282930
55
1
56
1
57
40
1
41
1
42
1
43
1
44
1
1
1
7Q
!
1
1
1
6
34
91D1112
5
1
§4§5
56
13141516

82M0782

NOTE
:

For
the
diagnostic
procedure
on
control
module
power

supply
and
ground
line,
referto
2-7
[T8C0]~r2
.

1
2
34U
56
U
78
UU9
10
U
1112
U
1314
01516
171
B
19
202122
23
3132
33
3
3536
37
38
39
45
71
46477273484974
75
50
51
16775253787954BO
81
82B3585984BS60
61
868762638B8964
65
90
91
6667
92
936

63

2-7
[79D0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

9
.
Diagnostics
for
Engine
Starting
Failure

D
:
IGNITION
CONTROL
SYSTEM

WIRING
DIAGRAM
:

Ignitor

884813
-

B62

ECM

E
00EII
2
_1
~"',

IgQition

t
t
Coll

910
1112
131415163132
3334
35
36373940
4142
4344
F
5859606162
5IF67
8
7

84
86187
8
18919019119219319419519
U
//Ii
U

(P
(ED(9)

a

1234
6
78
9101112
13141516
1112137415161
111
M23
1321V10522

NOTE
:

For
the
diagnostic
procedure
on
ignition
controlsystem,

referto
2-7
[T8D0]*2
.

64

F45~~_
,
~
IG
"I

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[M0]
2-7
9
.
Diagnostics
for
Engine
Starting
Failure

E
:
FUEL
PUMP
CIRCUIT

WIRING
DIAGRAM
:

Fuel
pump

#F

S
.M
.J
.

A57R15
R1
B97

N7--

E

Fuel
pump
relay

0
7

SBF-2

~-
No
.16
IG

-L

862F45

cL
.M

O

111213111516
R5B
Ri5
B46

*9
3637
39
412
4344
1
23
1
2
1
2
636466
67
6869
70
4
56
345634
8889
90
9192
9
96
u
SBF-4

~5

12345
69
1112131
15161718192
10

B2M0783

NOTE
:

For
the
diagnostic
procedure
on
fuel
pump
circuit,
refer
to

2-7
[T8EOj*2
.

65

2-7[T9F0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
9
.
Diagnostics
for
Engine
Starting
Failure

F
:
FUEL
INJECTOR
CIRCUIT

WIRING
DIAGRAM
:

Main
relay
0
0

847

SBF-2

884
B22
E3E6
E11

#3
tt4

E5
E16
ECM
#1
#2

B84B22847E5
E6
E16E17

11
1234
34
678

1
[

1
2
903
9
101112
34
9
13141
i6

82M0784

NOTE
:

Forthe
diagnostic
procedure
on
fuel
injector
circuit,
refer

to
2-7
[T10Q0]*2
.

66

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T9G0]
2-7
9
.
Diagnostics
for
Engine
Starting
Failure

G
:
CRANKSHAFT
POSITION
SENSOR
CIRCUIT

WIRING
DIAGRAM
:

B84
B20
E1

ECM
''--------

E10

Crankshaft
position
sensor

O

Crankshaft
sprocket

E84

B20
E10

1
23

456
12

1
23456
7
8

1718190
21
2
2324
28290

45
1
46
1
4
7
1
48
1
49
150

11
1
521
53
1
54
55
5657

7
1
721731
1
4
175
11
6
/
80
81
8283

B2M0529

NOTE
:

For
the
diagnostic
procedure
on
crankshaft
position
sen-

sor
circuit,
referto
2-7
[T1OZ0]*2
.

67

2-7
[T9H0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

9
.
Diagnostics
for
Engine
StartingFailure

H
:
CAMSHAFT
POSITION
SENSOR
CIRCUIT

WIRING
DIAGRAM
:

B84

B20
E1

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

ECM
T
..........
.r

E15
Camshaft
pulley

Camshaft
position
sensor

B84

B20E15
0

123
456
i2

82M0530

NOTE
:

For
the
diagnostic
procedure
on
crankshaft
position
sen-

0AA0]*2
.
sor
circuit,
referto
2-7
[T1

~

1

2

11

3

2

4

21

u
5

4

6
u
7
8

29

u

0

4546
47484950
51
5253545556
51

1
469
80
1
82
3

68

2-7
[T11B0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
11
.
Diagnostics
Chart
with
Trouble
Code

B
:
DTC
P0100

-
MASS
AIR
FLOW
SENSOR
CIRCUIT

MALFUNCTION
(QA)
-

WIRING
DIAGRAM
:

Main
relay

0
0

847

17
SBF-2
-
-
--
-
---
-
-
-
-
------
-
-
-
-
-
-
--
--------------------------11
ECM

E
(a
,~
a0
0

4
O
Mass
air
flow
sensor

12u34
u
56
u
78
u
1
234
171
192021
232
2526211
2
6
8

M56
4450
515
5355
59101112
7172
17576
77
7880
81
1
131
4
1516
1
2345

B2M0785

NOTE
:

For
the
diagnostic
procedure
on
mass
air
flow
sensor
cir-

cuit
malfunction
(DTC
P0100),
referto
2-7
[T10B0]*2
.

76

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T1ico]
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

C
:
DTC
P0101

-
MASS
AIR
FLOW
SENSOR
CIRCUIT

RANGE/PERFORMANCE
PROBLEM

(QA
-
R)
-

WIRING
DIAGRAM
:

Main
relay
0
0

B47

SBF-2

--------------------------11
'7

ECM

Ei
0
B12
0

O
Mass
a
ir
flowsensor

0

1
2u
4
u
56
u
78u
1234
1711920Zt
23
1526
271
34
6
8

M56
464
1
51152
153M
5
9101112
7112
747
76
7718
81
283
13141
16
1
234
5

82M0785

NOTE
:

For
the
diagnostic
procedure
on
mass
air
flow
sensor
cir-

cuit
range/performanceproblem
(DTC
P0101),
refer
to
2-7

[T10C0]*2
.

77