Page 233 of 2890
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
Page 234 of 2890
ON-BOARD
DIAGNOSTICS
11
SYSTEM
[rIoBROi
2-7
10
.
Diagnostics
Chart
with
Trouble
Code
WIRING
DIAGRAM
:
Main
relay
0
0
B41
B61F45
SBF-2
B84
~
ECM
S
.M
.J
Vent
control
.
solenoid
897
Rt
R15
R57
R69
valve
Canister
O
B47R57
R69
U
910
U
1112
U
1314L11516
3132
3334353637383940
4142
4344
1
2
6162
63
64656667
68
6970
34
1
lu
//j848586
8788
8990
9192
93
949596
56
B2M1018
23
Page 235 of 2890
![SUBARU LEGACY 1996 Service Repair Manual 2_7
[T10BR1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
D
H2M1238A
I
1
10BR1
I
CHECK
OUTPUT
SIGNAL
FROM
ECM
.
1)
Turn
ignition
switch
to
ON
.
2)
Measure
voltage
betw SUBARU LEGACY 1996 Service Repair Manual 2_7
[T10BR1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
D
H2M1238A
I
1
10BR1
I
CHECK
OUTPUT
SIGNAL
FROM
ECM
.
1)
Turn
ignition
switch
to
ON
.
2)
Measure
voltage
betw](/manual-img/17/57433/w960_57433-234.png)
2_7
[T10BR1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
D
H2M1238A
I
1
10BR1
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
.
35
(+)
-
Chassis
ground
(
)
:
Is
thevoltage
more
than10
V?
,res
:
Go
to
step
10BR2
.
No
:
Go
to
step
10BR3
.
CHECK
HARNESSBETWEEN
VENT
CON-
10BR2
TROL
SOLENOIDVALVE
AND
ECM
CON-
NECTOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connector
from
vent
control
solenoid
valve
.
3)
Turn
ignition
switch
to
ON
.
4)
Measure
voltage
between
ECM
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(B84)
No
.
35
(+)
-
Chassis
ground
(
)
:
Is
thevoltage
more
than
10
V?
,rES
;
Repair
short
circuit
in
harness
and
replace
ECM
.
NOTE
:
The
harness
between
ECM
and
vent
control
solenoid
valve
isin
short
circuit
.
No
:
Go
to
nextstep
5)
.
5)
Turn
ignition
switch
to
OFF
.
6)
Measure
resistance
between
vent
control
solenoid
valve
terminals
.
CHECK
:
Terminals
No
.
1
-
No
.
2
:
Is
the
resistance
lessthan
1
SZ?
Replace
vent
control
solenoid
valve
and
ECM
.
o
:
Go
to
next
CHECK
CHECK
:
Is
there
poor
contact
in
ECM
connector?
ves
:
Repair
poor
contact
in
ECM
connector
.
No
:
Replace
ECM
.
24
Page 236 of 2890

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TIoBRai
2-7
10
.
Diagnostics
Chart
with
Trouble
Code
1
z
R69
L
E
H2M
1239C
SL
H2M1238A
I
CHECK
HARNESSBETWEEN
VENT
CON-
10BR3
TROL
SOLENOID
VALVE
ANDECM
CON-
NECTOR
.
1)
Turn
ignition
switch
to
OFF
.
2)
Disconnect
connectors
from
vent
control
solenoid
valve
and
ECM
.
3)
Measure
resistance
of
harness
between
vent
control
solenoid
valve
connector
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(R69)
No
.
2
-
Chassis
ground
:
!s
the
resistance
less
than10
S2?
vES
:
Repair
short
circuit
in
harness
between
ECM
and
vent
control
solenoid
valve
connector
.
No
:
Go
to
nextstep
4)
.
(884)
No
.
35
-
(R69)
No
.
2
:
Is
the
voltage
less
than
1
S2?
,rES
:
Go
to
step
10BR4
.
No
;
Repair
harness
and
connector
.
NOTE
:
In
this
case,
repair
the
following
:
*
Open
circuit
in
harness
between
ECM
and
vent
control
solenoid
valve
connector
9
Poor
contact
in
coupling
connectors
(B97
and
R57)
4)
Measure
resistance
of
harness
between
ECM
and
vent
control
solenoid
valve
connector
.
CHECK
:
Connector
&
terminal
10BR4
CHECK
VENT
CONTROL
SOLENOID
VALVE
.
Measure
resistance
between
vent
control
solenoid
valve
terminals
.
CHECK
:
Terminals
No
.
1
-
No
.
2
:
Is
the
resistance
between
10
and
100
S2?
YES
;
Go
tostep
10BR5
.
No
:
Replace
vent
control
solenoid
valve
.
25
Page 237 of 2890
2-7
['r10BR5]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
10
.
Diagnostics
Chart
with
Trouble
Code
R69
E
11U2
D
H2M1241C
I
10BR5
CHECK
I
TROL
SOL
NOID
SUPPLY
VALVE,TO
VENT
CON-
1)
Turn
ignition
switch
to
ON
.
2)
Measure
voltage
between
vent
control
solenoid
valve
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(R69)
No
.
1
(+)
-
Chassis
ground
(
)
:
Is
the
voltage
more
than10
V?
Go
to
next
CHECK
No
:
Repair
harness
and
connector
.
NOTE
:
In
this
case,
repair
the
following
:
e
Open
circuit
in
harness
between
main
relay
and
vent
control
solenoid
valve
"
Poor
contact
in
coupling
connectors
(B97
and
R57)
"
Poor
contact
in
main
relay
connector
CHECK
:
Is
there
poor
contact
in
vent
control
solenoid
valve
connector?
vss
:
Repair
poor
contact
in
vent
control
solenoid
valve
connector
.
No
:
Contact
with
SOA
service
.
NOTE
:
Inspection
by
DTM
is
required,
because
probable
cause
is
deteriorationof
multiple
parts
.
26
Page 238 of 2890
ON-BOARD
DIAGNOSTICS
II
SYSTEM
[-rlosRS1
2-7
10
.
DiagnosticsChart
with
Trouble
Code
MEMO
:
27
Page 239 of 2890
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
Page 240 of 2890
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