Page 249 of 2890
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
Page 250 of 2890
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
Page 251 of 2890
![SUBARU LEGACY 1996 Service Repair Manual 2_7
[T10BU1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
lTl_~l
~141
~112llljl
1
9
41!1!_441
~T913
2
31
l96l95l94P3P2P=188
U
1
A~
F-1
E)
H2M14088
2
1
ni
.
_,0Q0-j
SUBARU LEGACY 1996 Service Repair Manual 2_7
[T10BU1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
lTl_~l
~141
~112llljl
1
9
41!1!_441
~T913
2
31
l96l95l94P3P2P=188
U
1
A~
F-1
E)
H2M14088
2
1
ni
.
_,0Q0-j](/manual-img/17/57433/w960_57433-250.png)
2_7
[T10BU1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
lTl_~l
~141
~112llljl
1
9
41!1!_441
~T913
2
31
l96l95l94P3P2P=188
U
1
A~
F-1
E)
H2M14088
2
1
ni
.
_,0Q0-j
B2M09291
II-013-M,
I
CHECK
OUTPUT
SIGNAL
FROM
ECM
.
1)
Turn
ignition
switch
to
ON
.
2)
Measure
voltage
between
ECM
and
chassis
ground
.
CHECK
:
Connector&
terminal
(B84)
No
.
10
(+)
-
Chassis
ground
(
)
:
Is
thevoltage
more
than10
V?
0
:
Go
to
step
10BU2
.
No
:
Go
to
step
10BU3
.
CHECK
HARNESS
BETWEEN
FUEL
TANK
10BU2
PRESSURE
CONTROL
SOLENOID
VALVE
ANDECM
CONNECTOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
fuel
tank
pressure
control
solenoid
valve
.
3)
Turn
ignition
switch
to
ON
.
4)
Measure
voltage
between
ECM
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(884)
No
.
10
(+)
-
Chassis
ground
(
)
:
Is
thevoltage
more
than10
V?
,rES
;
Repair
short
circuit
in
harness
and
replace
ECM
.
NOTE=
The
harness
between
ECM
and
fuel
tank
pressure
control
solenoid
valve
is
in
short
circuit
.
No
:
Go
to
nextstep
5)
.
5)
Turn
ignition
switch
to
OFF
.
6)
Measure
resistance
between
fuel
tank
pressure
control
solenoid
valve
terminals
.
CHECK
:
Terminals
No
.
1
-
No
.
2
:
Is
the
resistance
less
than
1
S2?
Replace
fuel
tankpressure
control
solenoid
valve
and
ECM
.
Go
to
next
CHECK
CHECK
:
Is
there
poor
contact
in
ECM
connector?
Repair
poor
contact
in
ECM
connector
.
No
:
Replace
ECM
.
40
Page 252 of 2890
![SUBARU LEGACY 1996 Service Repair Manual
ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T10BU4]
2-7
10
.
Diagnostics
Chart
with
Trouble
Code
R68
D
82M0930A
I
2
1
D
S2
B2M0929
I
CHECK
HARNESSBETWEEN
FUEL
TANK
10BU3
PRESSURE
CONTROL
SOLENOID
VALVE
SUBARU LEGACY 1996 Service Repair Manual
ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T10BU4]
2-7
10
.
Diagnostics
Chart
with
Trouble
Code
R68
D
82M0930A
I
2
1
D
S2
B2M0929
I
CHECK
HARNESSBETWEEN
FUEL
TANK
10BU3
PRESSURE
CONTROL
SOLENOID
VALVE](/manual-img/17/57433/w960_57433-251.png)
ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T10BU4]
2-7
10
.
Diagnostics
Chart
with
Trouble
Code
R68
D
82M0930A
I
2
1
D
S2
B2M0929
I
CHECK
HARNESSBETWEEN
FUEL
TANK
10BU3
PRESSURE
CONTROL
SOLENOID
VALVE
AND
ECM
CONNECTOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connectors
from
fuel
tankpressure
control
solenoid
valve
and
ECM
.
3)
Measure
resistance
of
harness
between
fuel
tank
pres-
sure
control
solenoid
valve
connector
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(R68)
No
.
2
-
Chassis
ground
:
Is
the
resistance
less
than
10
S2?
,rES
;
Repair
short
circuit
in
harness
between
ECM
and
fuel
tank
pressure
control
solenoid
valve
connec-
tor
.
No
:
Go
to
nextstep
4)
.
4)
Measure
resistance
of
harness
between
ECM
and
fuel
tank
pressure
control
solenoid
valve
connector
.
CHECK
:
Connector&
terminal
(B84)
No
.
10
-
(R68)
No
.
2
:
Is
the
voltage
less
than
1
SZ?
,res
:
Go
tostep
10BU4
.
No
:
Repair
harness
and
connector
.
NOTE
:
In
this
case,
repair
the
following
:
*
Open
circuit
in
harness
between
ECM
and
fuel
tank
pressure
control
solenoid
valve
connector
e
Poor
contact
in
coupling
connectors
(B97
and
R57)
PRESSURE
CONTROL
10BU4
CHECK
FUEL
I
SOLENOIDVALVE
.
Measure
resistance
between
fuel
tank
pressure
control
solenoid
valve
terminals
.
CHECK
:
Terminals
No
.
1
-
No
.
2
:
Is
the
resistance
between
10
and
100
S2?
YES
:
Go
to
step
10BU5
.
No
:
Replace
fuel
tank
pressure
control
solenoid
valve
.
41
Page 253 of 2890
2_7
[T1oBUS1
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
R68
B2M0932A
I
10BU5
I
PRESSURE
CONTROL
SOLENOID
VALVE
.
1)
Turn
ignition
switch
to
ON
.
2)
Measure
voltage
between
fuel
tankpressure
control
solenoid
valve
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(R68)
No
.
1
(+)
-
Chassis
ground
(
)
:
Is
the
voltage
more
than
10
V?
,res
:
Go
tonext
CHECK
o
:
Repair
harness
and
connector
.
NOTE
:
In
this
case,
repair
the
following
:
9
Open
circuit
in
harness
between
main
relay
and
fuel
tankpressure
control
solenoid
valve
connector
"
Poor
contact
in
coupling
connectors
(B97
and
R57)
"
Poor
contact
in
main
relay
connector
CHECK
:
Is
there
poor
contact
in
fuel
tank
pressure
control
solenoid
valve
connector?
,res
:
Repair
poor
contact
in
fuel
tank
pressure
control
solenoid
valve
connector
.
No
:
Contact
with
SOA
service
.
NOTE
:
Inspection
by
DTM
is
required,
because
probable
cause
is
deterioration
of
multiple
parts
.
42
Page 254 of 2890
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
Page 255 of 2890
ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TloBVi]
2-7
10
.
Diagnostics
Chart
with
Trouble
Code
Test
mode
connector
B2M04328
10BV1
I
CHECK
FUEL
TANK
PRESSURE
CONTROL
SOLENOID
VALVE
.
1)
Turn
ignition
switch
to
OFF
.
2)
Connect
test
mode
connector
.
3)
Turn
ignition
switch
to
ON
.
CHECK
:
Does
fuel
tank
pressure
control
solenoid
valve
produce
operating
sound?
NOTE
:
Fuel
tank
pressure
control
solenoid
valve
operation
check
can
also
be
executed
using
Subaru
Select
Monitor
(Func-
tion
mode
:
FD07)
.
For
the
procedure,
refer
to
"COMPUL-
SORY
VALVE
OPERATION
CHECK
MODE"
2-7
[T3F0]*4
.
vES
:
Check
evaporative
emission
control
system
.
<
Ref
.
to
2-7
[T10BQ0]
.*7
>
No
:
Replace
fuel
tank
pressure
control
solenoid
valve
.
45
Page 256 of 2890
![SUBARU LEGACY 1996 Service Repair Manual 2_7
[T10BW0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
OBD
(FBI)
P1402
<FLVL>
H2M1411
BW
:
DTC
P1402
-
FUEL
LEVEL
SENSOR
CIRCUIT
MALFUNCTION
(FLVL)
-
DTC
DETECTIN SUBARU LEGACY 1996 Service Repair Manual 2_7
[T10BW0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
OBD
(FBI)
P1402
<FLVL>
H2M1411
BW
:
DTC
P1402
-
FUEL
LEVEL
SENSOR
CIRCUIT
MALFUNCTION
(FLVL)
-
DTC
DETECTIN](/manual-img/17/57433/w960_57433-255.png)
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