1996 SUBARU LEGACY air condition

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

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P0181

H2M1350

BP
:
DTC
P0181

-
FUEL
TEMPERATURE
SENSOR
A
CIRCUIT

RANGE/PERFORMANCE
PROBLEM

(TN
KT
-
F)
-

DTC
DETECTINGCONDITION
:

Two
consecutive
trips
with
fault

10BP1
I
Check
DTC
P0180
on
display
.

CAUTION
:

After
repair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

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

WIRING
DIAGRAM
:

884

ECM

301

S
.M
.J
.

B91
R1
R15R57R58
Fuel
tank

Fuel
temperature
===@H
sensor

884B22

1
U34
U5U
78
U
1
2
34
1711811912012112212312
51
1152211523112152511526113'
68
55
91
1451461471481491501
47
1
01112
1/11/21/31141151761//1781/91601811821631
193142116
U
1121
E
1
23
4
1
b
1
65
3-7
10
1
[49

B2M1015

16

2-7
R1oBOO]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P0440


H2M1365

BQ
:
DTC
P0440

-
EVAPORATIVE
EMISSION
CONTROL

SYSTEM
MALFUNCTION
(EVAP)
-

DTC
DETECTING
CONDITION
:

Two
consecutive
trips
with
fault

TROUBLE
SYMPTOM
:

Gasoline
smell

10BQ1
Check
any
other
OTC
(besides
OTC

P0440)
on
display
.

10B02
Check
fuel
filler
capand
fuel
filler
pipe
.

10B03Check
vent
control
solenoid
valve
.

10B04
Check
purge
control
solenoid
valve
.

10805
Check
pressure
control
solenoid
valve
.

10B06
Check
evaporative
emission
control

system
line
.

CAUTION
:

After
repair
or
replacement
of
faulty
parts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

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

18

2-7
[T10BR0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P
044
6


H2M1368

BR
:
DTC
P0446

-
EVAPORATIVE
EMISSION
CONTROL

SYSTEM
VENT
CONTROL
MALFUNCTION

(VCMSOL)
-

DTC
DETECTING
CONDITION
:

Two
consecutive
trips
with
fault

10BR1Check
output
signal
from
ECM
.

10BR2
Check
harnessbetween
ventcontrol

solenoid
valve
and
ECM
connector
.

10BR3Check
harness
between
vent
control

solenoid
valve
and
ECM
connector
.

10BR4
Check
ventcontrol
solenoid
valve
.

10BR5Checkpower
supply
to
vent
control

solenoid
valve
.

CAUTION
:

After
repair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

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

22

2_7
[T10BS0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
DiagnosticsChart
with
Trouble
Code

OBD
(FBI)

P0450

H2M1372

BS
:
DTC
P0450

-
EVAPORATIVE
EMISSION
CONTROL

SYSTEM
PRESSURE
SENSOR
MALFUNCTION

(TNKP)
-

DTC
DETECTING
CONDITION
:

9
Immediately
atfault
recognition

10BSi
I
Connect
Subaru
Select
Monitor
or
the

OBD-II
general
scan
toot,
and
read
data
.

Check
inputsignal
for
ECM
.
(Using

10BS2
voltage
meter
and
Subaru
Select

Monitor
.)

10BS3
I
Check
harness
between
ECM
and
fuel

tank
pressure
sensor
connector
.

10BS4
Check
harnessbetween
ECM
and
fuel
tank
pressuresensor
connector
.

CAUTION
:

Afterrepair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

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

28

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

2_7
[T1oBUO1
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P1400


H2M
1406

BU
:
DTC
P1400

-
FUEL
TANK
PRESSURE
CONTROL

SOLENOID
VALVE
CIRCUIT
MALFUNCTION

(PCVSOL)
-

DTC
DETECTING
CONDITION
:

Two
consecutive
trips
with
fault

10131
.11
Check
output
signal
from
ECM
.

I

10BU2
Check
harness
between
fuel
tank

pressure
control
solenoid
valve
and
ECM

connector
.

1081
.13

Check
harness
between
fuel
tank

pressure
control
solenoid
valve
and
ECM

connector
.

10BU4Check
fuel
tank
pressure
control

solenoid
valve
.

10BU5Checkpower
supply
to
fuel
tank

pressure
control
solenoid
valve
.

CAUTION
:

After
repair
or
replacement
of
faultyparts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

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

38

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

2_7
[T10BW0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

OBD
(FBI)

P1402


H2M1411

BW
:
DTC
P1402

-
FUEL
LEVEL
SENSOR
CIRCUIT

MALFUNCTION
(FLVL)
-

DTC
DETECTING
CONDITION
:

Two
consecutive
trips
with
fault

108W1
Checkspeedometer
and
tachometer

operation
in
combination
meter
.

Check
ground
circuit
of
combination

meter
.

108W3

Check
inputsignal
for
ECM
.
(Using

voltage
meter
andSubaru
Select

Monitor
.)

10BW4
Check
fuel
level
sensor
.

10BW5
Check
fuel
sub
level
sensor
.

10BW6
Check
harness
between
fuel
pump
and

fuel
sub
meter
unit
connector
.

10BW7
Check
ground
circuit
of
fuel
level
sensor
.

Check
harnessbetween
ECM
and
fuel

pump
connector
.

10BW9

Check
harnessbetween
ECM,

combination
meter
and
fuel
pump

connector
.

10BW10
Check
harness
between
combination

meter
and
fuel
pump
connector
.

108W11
Check
combination
meter
.

CAUTION
:

After
repair
or
replacement
of
faulty
parts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

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

46