1996 SUBARU LEGACY wiring

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T10BS0]
2_7

10
.
Diagnostics
Chart
with
Trouble
Code

WIRING
DIAGRAM
:

S
.M
.J
.

884891
R1
R47

Fuel
tank
pressure
sensor
ECM

75-

884R41

u
uu
u
1
0
11
2
~25101152T4252627
2829
0
4444
61
49
80
1
2

B2M1019

29

2_7
[T10BT0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P0451


H2M
1377

BT
:
DTC
P0451

-
EVAPORATIVE
EMISSION
CONTROL

SYSTEM
PRESSURE
SENSOR

RANGE/PERFORMANCE
PROBLEM

(TNKP
-
F)
-

DTC
DETECTING
CONDITION
:

Two
consecutive
trips
with
fault

I
1OBT1
I
Check
pressure/vacuum
line
.

CAUTION
:

After
repair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

c
Ref
.
to
2-7
[T3D0]
and
[T3E0]
.*2
and
*4
>

WIRING
DIAGRAM
:

S.M
.J
.

B84897
Ri
R47

Fuel
tankpressure
sensor
ECM

L,

884R47

u
u
u
su
1
71
18
1
1
91201211
2
212312412512612712
8
1
2
913011
78
5
go
8T7T
72
444
44
17374759
7
7
123

82M1019

36

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T10BU0]
2_7
10
.
DiagnosticsChart
with
Trouble
Code

WIRING
DIAGRAM
:

Main
relay
0
0

~
frF

847

ECM

TIT
-

862F45
SBF-2
r=
--
S
.M
.J
.
897
R1
R15
R57
R68
Fuel
tankpressure
control
solenoid
va
ve

91
0

1

31132133134135
581591~601r6l!62
r-
-
~
483
6
7
U8
.
P516
-Ll
//j
U

1321V11020

39

2-7
[T1
oBVO1
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P1401

H21
M1410

BV
:
DTC
P1401

-
FUEL
TANK
PRESSURE
CONTROL
SYSTEM

FUNCTION
PROBLEM
(PCV
-
F)
-

DTC
DETECTING
CONDITION
:

Two
consecutive
trips
with
fault

10BV1
Check
fuel
tank
pressure
control

solenoid
valve
.

CAUTION
:

After
repair
or
replacement
of
faulty
parts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

<
Ref
.
to
2-7
[T3D0]
and
[T3E0]
.*2
and
*4
>

WIRING
DIAGRAM
:

Main
relay
0

0

01F
B47861F45
SBF-2
B84

E
E)E)
ECM

ra

Ti

S
.M
.J
.
891
Rt
R15
R57R68
Fuel
tankpressure
control
solenoid
valve

847
R57R68

10
U
1112
U
131401
16

1
131
1
4041424344
1
2
960
6162
63
64
6
-769
69
70
34
1~,~y(3~
8
.04
687
8
99091929
949
96
6
14j5jti1/LtiJ

B2M1020

44

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TloBw2i
2-7
10
.
Diagnostics
Chart
with
Trouble
Code

WIRING
DIAGRAM
:

a
:
QD
Combination
b
:
i12
meter
Ignition
c
:
i14
No
.
15W2
switch
SBF-4
FL1
.25B

Fuel
gauge

S
.M
.J
.

O
O
E
E)
El)

Fuel
pumpASSY

R58
Fuel
level
sensor

Junction
A

R15R57

ECM
~
Fuel
sub
meter
unit

Fuel
sub
O
~p
level
sensor

E

822

R57
872
R59

1
5
1
6
1
7
1
8
'
,

O
,'
IyWJJ
LJJJ
LJJ

u
4u
1Ju
i10
i~2
117118119~2
.0121122123V4
.
.
.
.
.
.
(D

1
1
1
141
141EIb1

B2M1021

CHECK
SPEEDOMETER
AND
TACHOMETER

(OPERATION
IN
COMBINATION
METER
.

CHECK
:
Does
speedometer
and
tachometer
operate

normally?

vES
:
Go
to
step
10BW3
.

No
:
Go
to
step
10BW2
.

10BW2
I
CHECK
GROUND
CIRCUIT
OFCOMBINA-

TION
METER
.

1)
Turn
ignition
switch
to
OFF
.

2)
Pull
out
combination
meter
from
instrument
panel
.

<
Ref
.
to
6-2
[W13A1
]
.*1
>

3)
Disconnect
connector
from
combination
meter
.

47

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[TIoBwB]
2-7
10
.
DiagnosticsChart
with
Trouble
Code

R58

B2M0938A
I

R58

B2M0939A
I

10BW7
CHECK

I
SENSOR
.

ROUND
CIRCUIT
OF
FUEL
LEVEL

Measure
resistance
of
harness
between
fuel
pump
con-

nector
and
chassis
ground
.

CHECK
:
Connector
&
terminal
(R58)
No
.
5
-
Chassis
ground
:

Is
the
resistance
less
than
5
92?

YES
:
Go
to
step
10BW8
.

No
:
Repair
harness
and
connector
.

NOTE
:

In
this
case,
repair
the
following
:

9
Open
circuit
in
harness
between
fuel
pump
connector

and
chassis
grounding
terminal

"
Poor
contact
in
fuel
pump
connector

"
Poor
contact
in
coupling
connectors
(R57,
B97and

B22)

1OBW8
CHECK
HARNESS

(FUEL
PUMP
CONNECTOREN

ECM
AND

1)
Connect
connector
to
fuel
sub
meter
unit
.

2)
Turn
ignition
switch
to
ON
.

3)
Measure
voltage
between
fuel
pump
connector
and

chassis
ground
.

CHECK
:
Connector
&
terminal
(R58)
No
.
3
(+)
-
Chassis
ground
(
)
:

Is
thevoltage
less
than
1
V?

Repair
harness
and
connector
.

NOTE
:

In
this
case,
repair
the
following
:

*
Open
circuit
in
harness
between
fuel
pump
connector

and
junction
A
on
rear
wiring
harness

"
Poor
contact
in
fuel
sub
meter
unit
connector

"
Poor
contact
in
fuel
pump
connector

"
Poor
contact
in
coupling
connector
(R57)

No
:
Go
to
nextstep
4)

51

2-7
[T10BW9]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

'-
'lam

o
-
-

-`
=1~\
~--
~
~
o

(D
--

.
G2M0340

R58

B2M0940A
I

4)
Turn
ignition
switch
to
OFF
.

5)
Disconnect
connector
from
ECM
.

6)
Turn
ignition
switch
to
ON
.

7)
Measure
voltage
between
ECM
connector
and
chassis

ground
.

CHECK
:
Connector
&
terminal

(B84)
No
.
27
(+)
-
Chassis
ground
:

Is
thevoltage
less
than
1
V?

vES
:
Repair
harness
and
connector
.

NOTE
:

In
this
case,
repair
the
following
:

9
Open
circuit
in
harness
between
ECM
connector
and

junction
A
on
rear
wiring
harness

9
Poor
contact
in
coupling
connector
(B97)

No
:
Repair
connector
.

NOTE
:

In
this
case,
repairthe
following
:

"
Poor
contact
in
fuel
pump
connector

"
Poor
contact
in
fuel
sub
meter
unit

"
Poor
contact
in
ECM
connector

CHECK
HARNESSBETWEEN
ECM,
COMBI-

10BW9
NATION
METER
AND
FUEL
PUMP
CONNEC-

TOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Remove
fuel
pump
access
hole
lid
located
on
the
right

rear
of
luggage
compartment
floor
.

3)
Disconnect
connector
from
fuel
pump
.

4)
Measure
resistance
of
harness
between
fuel
pump

connector
and
chassis
ground
.

CHECK
:
Connector
&
terminal
(R58)
No
.
3
-
Chassis
ground
:

Is
the
resistance
less
than10
S2?

vES
:
Go
to
nextstep
5)
.

No
:
Go
to
step
10BW10
.

5)
Remove
service
hole
cover
located
on
the
left
rear
of

luggage
compartment
floor
.

52

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TIoBw9]
2-7

10
.
DiagnosticsChart
with
Trouble
Code

R58

B2M0940A
I

R59

82M0941A
I

R15

B2M0942A
I

6)
Disconnect
connector
from
fuel
sub
meter
unit
.

7)
Measure
resistance
of
harness
between
fuel
pump

connector
and
chassis
ground
.

CHECK
:
Connector
&
terminal

(R58)
No
.
3
-
Chassis
ground
:

Is
the
resistance
less
than
10
92?

YES
:
Repair
short
circuit
in
harness
between
fuel
pump

and
fuel
sub
meter
unit
connector
.

No
:
Go
to
nextstep
8)
.

8)
Separate
fuel
tank
cord
connector
(R57)
and
rear
wir-

ing
harness
connector
(R15)
.

9)
Measure
resistance
of
harness
between
fuel
sub
meter

unit
connector
and
chassis
ground
.

CHECK
:
Connector
&
terminal

(R59)
No
.
1
-
Chassis
ground
:

Is
the
resistance
less
than10
S2?

,rES
:
Repair
short
circuit
in
fuel
tankcord
.

No
:
Go
to
nextstep
10)
.

10)
Separate
rear
wiring
harness
connector
(R1)
and

bulkhead
wiring
harness
connector
(B97)
.

11)
Measure
resistance
of
harness
between
rear
wiring

harnessconnector
and
chassis
ground
.

CHECK
:
Connector
&
terminal

(R15)
No
.
3
-
Chassis
ground
:

Is
the
resistance
less
than10
0?

,rES
:
Repair
short
circuit
in
rear
wiring
harness
.

No
:
Go
to
nextstep
12)
.

12)
Measure
resistance
of
harness
between
bulkhead
wir-

ing
connector
and
chassis
ground
.

CHECK
:
Connector
&
terminal

(B97)
No
.
J2
-
Chassis
ground
:

Is
the
resistance
less
than10
S2?

,rES
:
Go
to
nextstep
13)
.

No
:
Repair
short
circuit

and
ECM
connector
.

in
harness
between
S
.M
.J
.

13)
Separate
bulkhead
wiring
harness
connector
(B38)

and
instrument
panel
wiring
harness
connector
(i3)
.

14)
Measure
resistance
of
harness
between
bulkhead
wir-

ing
harness
connector
and
chassis
ground
.

CHECK
;
Connector
&
terminal

(B97)
No
.
J2
-
Chassis
ground
:

Is
the
resistance
less
than10
SZ?

vES
:
Repair
short
circuit
in
bulkhead
wiring
harness
.

No
:
Repair
short
circuit
in
instrument
panel
wiring

harness
.

53