1996 SUBARU LEGACY intake

2-1
IM9-0)
EMISSION
CONTROL
SYSTEM
AND
VACUUM
FITTING
9
.
Vacuum
Fitting

9
.
Vacuum
Fitting

The
hose
and
pipe
connections
of
intake
manifold,
throttle
body
and
related
parts
are
as
shown

in
the
illustration
.

OSE
IPE

B2H0901A

Pressure
regulator
D
Pressuresources
switching
solenoid
valve
Throttle
body
OO
EGR
solenoid
valve
OO
Purge
control
solenoid
valve
(7)
EGR
valve
40
Pressuresensor
OO
BPT
OOFilter

2

2-7
[T3C6]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

6
.
READDATA
FUNCTION
KEY
LIST
FOR
ENGINE

Function
mode
Contents
Abbreviation
Unit
of
measure

F00
ROM
ID
number
YEAR
-

F01Battery
voltage
VB
V

F02
Vehicle
speed
signal
VSP
km/h,
MPH

F03Engine
speed
signal
EREV
rpm

F04Engine
coolant
temperature
signal
TW
°C,
°F

F05
Ignition
signal
ADVS
deg

F06
Mass
air
flow
signal
QA
g/s,
V

F07
Throttle
position
signal
THV
%,
V

FOS
Injector
pulse
width
TIM
ms

F09
Idle
air
control
signal
ISC
°/m

F10
Load
data
LOAD

F11
Front
oxygen
sensor
outputsignal
02
V

F12
Front
oxygen
sensor
maximum
and
minimum
output

signal
02max
-
min
V,
V

F13
Rear
oxygen
sensor
output
signal
R02
V

F14
Rear
oxygen
sensor
maximum
and
minimum
output

signal
R02max
-
min
V,
V

F17
Short
term
fuel
trim
ALPHA

F19
Knock
sensor
signal
KNOCK
deg

F20
Atmospheric
absolute
pressure
signal
BARD
.
P
kPa,
mmHg

F21
Intake
manifold
absolute
pressure
signal
MANi
.
P
kPa,
mmHg

F29
A/F
correction
(short
term
trim)
by
rear
oxygen
sensor
PHOS

F30
Longterm
fuel
trim
KBLRC

F31
Longterm
whole
fuel
trim
KO

F32
Front
oxygen
sensor
heater
current
F02H
A

F33
Rear
oxygen
sensor
heater
current
R02H
A

F36
Maximum
value
of
cylinder#1
misfire
times
during
100

rotations
MFi

F37
Maximum
value
of
cylinder
#2
misfire
times
during
100

rotations
MF2

F38
Maximum
value
of
cylinder
#3
misfire
times
during
100

rotations
MF3

F39
Maximum
value
of
cylinder
#4
misfire
times
during
100

rotations
MF4

F42
Maximum
and
minimum
EGR
system
pressure
value
EGRmax
-
minkPa

FAO
ON
H
OFF
signal
-
-

FA1
ON
~-->
OFF
signal
-
-

FA2
ON
H
OFF
signal
-
-

FA3
ON
H
OFF
signal
-
-

FA4
ON
H
OFF
signal
-
-

FA5
ON
H
OFF
signal
-
-

FBO
Diagnostic
trouble
code
(DTC)
INSPECT
-

18

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T3C6]
2-7
3
.
Diagnosis
System

Function
mode
Contents
Abbreviation
Unit
of
measure

FB1
Diagnostic
trouble
code
(DTC)
OBD
-

Load
data
(Freeze
frame
data)
LOAD-F

Engine
coolant
temperature
signal
(Freeze
frame
data)
TW-F
°C

Throttleposition
signal
(Freeze
frame
data)
ALPH-F

FB2
Long
term
fuel
trim
(Freeze
frame
data)
KBLR-F

Intake
manifoldabsolute
pressure
signal
(Freeze
frame

data)
MANI-F
kPa

Engine
speed
signal
(Freeze
frame
data)
EREV-F
rpm

Vehicle
speed
signal
(Freeze
frame
data)
VSP-F
km/h

Mass
air
flow
signal
(Freeze
frame
data)
QA-F
(P0100)
V

Pressure
signal
(Freeze
frame
data)
PS-F
(P0105)
V

Pressure
signal
(Freeze
frame
data)
PR-F
(P0106)
V

Engine
coolant
temperature
signal
(Freeze
frame
data)
TW-F
(P0115)
V

Throttleposition
signal
(Freeze
frame
data)
THV-F
(P0120)
V

17133
EGR
control
solenoid
valve
signal
(Freeze
frame
data)
EGR
(P0403)
-*1

Purge
control
solenoid
valve
signal
(Freeze
frame
data)
CPC
(P0443)
_*1

Start
switch
signal
(Freeze
frame
data)
STSW
(P1100)
_*1

Pressure
sources
switching
solenoid
valve
signal

(Freeze
frame
data)
gR1
(P1102)
_*1

Radiator
fanrelay
1
signal
(Freeze
frame
data)
FAN1
(P1500)
_*1

FCO
Clear
memory
-
-

FD01
Compulsory
fuel
pump
relay
operation
check
FUEL
PUMP
-

FD02
Compulsory
purge
control
solenoid
valveoperation

check
CPCSOL
-

FD03
Compulsory
radiator
fan
relay
operation
check
RAD
FAN
-

FD04
Compulsory
A/C
relay
operation
check
A/C
RELAY
-

FD05
Compulsory
EGR
control
solenoid
valve
operation

check
EGR
SOL
-

FD10
Compulsory
pressure
sources
switching
solenoid
valve

operation
check
BR
SOS
-

NOTE
:

1)
Subaru
select
monitor
is
also
available
for
monitoring

information
other
than
that
used
for
check
and
repair
of

the
vehicle
.

2)
F42
(Maximumandminimum
EGR
system
pressure

value)
will
not
read
accurately
until
the
EGR
flow
diagno-

sis
terminates
.

EGR
flow
diagnosis
terminates
when
LED
No
.
2
illuminates

at
function
mode
FA4
.

3)*1
:
"Hi"or
"Low"
is
shown
instead
of
measured
value
.

4)
Because
valve
is
not
installed,
FD06,
FD07,FD08,
FD09

and
FD11
will
be
displayed
but
non-functional
.

19

2-7
[T3C24]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

BARO
.P
(F20)

1
0
OkPa752mmHg

82M0755

MAN
I
.
P
(F21)

2
9kPa218mmHg

82M0756

PHOS
(
F29
)

0
.78

B2M0494

KBLRC
(F30)

5
.5

B2M0495

KO
(F31
)

B2M0496

24
.
FUNCTION
MODE
:
F20

-
ATMOSPHERICABSOLUTE
PRESSURE
SIGNAL

(BARD
.
P)
-

*
Atmospheric
absolutepressure
is
indicated
in
"kPa"

and
"mmHg"
at
the
same
time
.

25
.
FUNCTION
MODE
:
F21

-
INTAKE
MANIFOLD
ABSOLUTE
PRESSURE
SIGNAL

(MANI
.
P)
-

e
Intake
manifoldabsolutepressure
is
indicated
in
"kPa"

and
"mmHg"
at
the
same
time
.

26
.
FUNCTION
MODE
:
F29

-
A/F
CORRECTION
COEFFICIENT
[SHORT
TERM

TRIM]
BY
REAR
OXYGENSENSOR
(PHOS)
-

27
.
FUNCTION
MODE
:
F30

-
LONGTERM
FUELTRIM
[A/F
LEARNING

CORRECTION
COEFFICIENT]
(KBLRC)
-

28
.
FUNCTION
MODE
:
F31

-
LONGTERM
FUEL
TRIM
WHOLE
[A/F
LEARNING

CONTROL
COEFFICIENT]
(KO)
-

24

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[T3C45]
2-7

3
.
Diagnosis
System

43
.
FB
MODE
FOR
ENGINE

Function
mode
AbbreviationContentsContents
of
display
Page

On-board
diagnostics
Current
trouble
code
indicated
by

FBOINSPECT
(Inspection)
on-board
diagnostics
after
clear
mem-
[T3E1]*2

ory
.

FB1
OBD
On-board
diagnostics
Current
trouble
code
indicated
by
14
(Read
data)
on-board
diagnostics
.

LOAD-F
Load
data

TW-F
Engine
coolant
temper-

aturesignal

ALPH-F
Throttleposition
signal
*
Freeze
frame
data

FB2
KBLR-F
Long
term
fuel
trim
*
Data
stored
at
the
time
of
trouble
15

Intake
manifold
abso-
occurrence,
is
shownon
display
.
MANI-F
lute
pressure
signal

EREV-F
Engine
speed
signal

VSP-F
Vehicle
speed
signal

QA-F
(P0100)
Mass
air
flow
signal

PS-F
(P0105)
Pressure
signal

PR-F
(P0106)
Pressure
signal

TW-r
(P0115)
Engine
coolant
temper-

ature
signal

THV-F
(P0120)
Throttleposition
signal

EGR
(P0403)
EGR
control
solenoid
,
Freeze
frame
data

FB3
valve
signal
9
Data
stored
at
the
time
of
trouble16

CPC
(P0443)
Purge
control
solenoid
occurrence,
is
shown
on
display
.
valve
signal

STSW
(P1100)
Start
switch
signal

Pressure
sources

BR1
(P1102)
switching
solenoid

valve
signal

FAN1
(P1500)
Radiator
fan
relay
1

signal

44
.
FC
MODE
FOR
ENGINE

Function
mode
Abbreviation
ContentsContents
of
display
Page

FCO
MEMORY
CLR
Back-up
memory
clear
Function
of
clearing
trouble
code
[T3D1]*2
stored
in
memory
.

45
.
FD
MODE
FOR
ENGINE

Function
mode
Abbreviation
ContentsContents
of
display
Page

FD01
FUEL
PUMP

FD02
CPCSOL
Function
of
checking
operation
offuel

FD03
RAD
FAN
Compulsory
valve
pump
relay,
purge
control
solenoid

A/C
ll
di
tf
l
39
FD04
A/C
RELAY
operation
check
an
re
revave,
ra
a
or
ay,
ay,

EGR
control
solenoid
valve
and
pres-

FD05
EGR
SOL
sure
sources
switching
valve
.

FD10
BR
SOL

NOTE
:

Because
valve
is
not
installed,
FD06,
FD07,
FD08,
FD09
and
FD11
will
be
displayed
but
non-functional
.

31

3) Installation is in the reverse order of removal.
CAUTION:
Insert air vent hose of canister into the hole on body.
B2M0952
2. 2200 cc AWD MODEL
1) Lift-up the vehicle.
2) Disconnect evaporation hoses from canister.
B2M0953
3) Remove canister from body.
4) Installation is in the reverse order of removal.
Tightening torque:
25±7 N⋅m (2.5±0.7 kg-m, 18.1±5.1 ft-lb)
B2M0422A
4. Purge Control Solenoid Valve
A: REMOVAL AND INSTALLATION
1) Remove bolt which installs purge control solenoid valve
onto intake manifold.
NOTE:
This figure shows the rear side of intake manifold.
B2M0168
2) Take out purge control solenoid valve through the bot-
tom of the intake manifold.
3) Disconnect connector and hoses from purge control
solenoid valve.
7
2-1SERVICE PROCEDURE
3. Canister - 4. Purge Control Solenoid Valve

3) Installation is in the reverse order of removal.
CAUTION:
Insert air vent hose of canister into the hole on body.
B2M0952
2. 2200 cc AWD MODEL
1) Lift-up the vehicle.
2) Disconnect evaporation hoses from canister.
B2M0953
3) Remove canister from body.
4) Installation is in the reverse order of removal.
Tightening torque:
25±7 N⋅m (2.5±0.7 kg-m, 18.1±5.1 ft-lb)
B2M0422A
4. Purge Control Solenoid Valve
A: REMOVAL AND INSTALLATION
1) Remove bolt which installs purge control solenoid valve
onto intake manifold.
NOTE:
This figure shows the rear side of intake manifold.
B2M0168
2) Take out purge control solenoid valve through the bot-
tom of the intake manifold.
3) Disconnect connector and hoses from purge control
solenoid valve.
7
2-1SERVICE PROCEDURE
3. Canister - 4. Purge Control Solenoid Valve

4) Installation is in the reverse order of removal.
Tightening torque:
16±1.5 N⋅m (1.6±0.15 kg-m, 11.6±1.1 ft-lb)
B2M0423
5. EGR Valve
A: REMOVAL AND INSTALLATION
1) Disconnect vacuum hose from EGR valve.
2) Remove bolts which install EGR valve onto intake mani-
fold.
3) Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
Tightening torque:
17.1 — 20.1 N⋅m (1.74 — 2.05 kg-m, 12.6 — 14.8
ft-lb)
B2M0424
6. Back-Pressure Transducer (BPT)
A: REMOVAL AND INSTALLATION
1) Disconnect vacuum hoses from BPT.
2) Remove BPT from bracket.
3) Installation is in the reverse order of removal.
8
2-1SERVICE PROCEDURE
4. Purge Control Solenoid Valve - 6. Back-Pressure Transducer (BPT)