1996 SUBARU LEGACY harness connector

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

8)
Turn
ignition
switch
to
OFF
.

9)
Disconnect
connector
from
ECM
.

10)
Measure
resistance
of
harness
between
ECM
and

pressure
sensor
connector
.

CHECK
:
Connector&
terminal

(B84)
No
.
4
-
(R47)
No
.
2
:

Is
the
resistance
less
than
1
09

YES
.
Go
to
next
CHECK
,

No
:
Repair
harness
and
connector
.

NOTE
:

In
this
case,
repair
the
following
:

9
Open
circuit
in
harness
between
ECM
and
fuel
tank

pressure
sensor
connector

9
Poor
contact
in
coupling
connector
(B97)

CHECK
:
Connector
&
terminal

(884)
No
.
20
-
(R47)
No
.
1
:

Is
the
resistance
less
than
1
S2?

,res
:
Go
to
next
step
11)
.

No
:
Repair
harness
and
connector
.

NOTE
:

In
this
case,
repair
the
following
:

e
Open
circuit
in
harness
between
ECM
and
fuel
tank

pressure
sensor
connector

9
Poor
contact
in
coupling
connector
(B97)

33

2-7
IT10BS4]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

10
.
Diagnostics
Chart
with
Trouble
Code

H2M1257B
I

82M0927

11)
Measure
resistance
of
harness
between
fuel
tank

pressure
sensor
connector
and
chassis
ground
.

CHECK
:
Connector
&
terminal
the
kW

CHECK
:
Is
there
poor
contact
in
fuel
tank
pressure

sensor
connector?

vES
:
Repair
poor
contact
in
fuel
tank
pressure
sensor

connector
.

Replace
fuel
tank
pressure
sensor
.
No
:

(R47)
No
.
1
-
Chassis
ground
:

Is
resistance
more
than
500

Go
to
next
CHECK

No
:
Repair
short
circuit
in
harness
between
ECM
and

fuel
tank
pressure
sensor
connector
.

CHECK
HARNESS
BETWEEN
ECM
AND

10BS4
FUEL
TANK
PRESSURE
SENSOR
CONNEC-

TOR
.

1)
Turn
ignition
switch
to
OFF
and
Subaru
Select
Moni-

tor
or
the
OBD-II
general
scan
tool
switch
to
OFF
.

2)
Detach
right
siderear
quarter
trim
panel
.

3)
Remove
right
siderear
quarter
trim
pocket
.

4)
Detach
right
siderear
quarter
insulator
.

34

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TloBSa1
2-7
10
.
DiagnosticsChart
with
Trouble
Code

TNKP
(F43)

0
.
10
k
P
a
1
mmHg

H2M1326

5)
Disconnect
connector
from
fuel
tank
pressure
sensor
.

6)
Remove
fuel
filler
cap
.

7)
Install
fuel
filler
cap
.

8)
Turn
ignition
switchto
ON
and
Subaru
Select
Monitor

or
theOBD-II
general
scan
tool
switch
to
ON
.

9)
Read
data
onSubaru
select
monitor
or
the
OBD-II
gen-

eral
scan
tool
.

e
Subaru
Select
Monitor

Designate
mode
using
function
key
.

Function
mode
:
F43

CHECK
:
Is
the
value
more
than2
.8
kPa
in
function

mode
F43?

,rES
:
Repair
short
circuit
in
harnessbetween
ECM
and

fuel
tank
pressure
sensor
connector
.

No
:
Replace
fuel
tankpressure
sensor
.

~
OBD-II
general
scan
tool

For
detailed
operation
procedures,
referto
the
OBD-II

General
Scan
Tool
Instruction
Manual
.

35

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
[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

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

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

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