check engine SUBARU LEGACY 1996 Service Repair Manual

1-3
[0301]
GENERAL
INFORMATION

3
.
Vehicle
Identification
Numbers
(V
.I
.N)

3
.
Vehicle
Identification
Numbers
(V
.I
.N)

1
.
APPLICABLE
V
.I
.N
.
IN
THIS
MANUAL

Station
2200
cc
AWD
~
4AT
T
4
TS
3
1
B
I
KT
I
9
I
5X
I
T
I
8
I
T
2
00
1
and
after
Wagon
engine
POST

2
.
THE
MEANINGOF
V
.I
.N
.

Marker
identifier

l

Stop-
mark

4
S
3

Sequential
number
302001
and
after
:
Station
Wagon

Plant
of
manufacture
and
transmission
type

Plant
of
manufacture
Transmissiontype
SIA

POST
8
(Full-time
AWD
4AT)

Model
year
T
1996

Check
digit

Weight
class
and
restraint
type
Passenger
car
5
:
Withoutpassive
restraint,
with
Dual
SRS
airbag

Model
9
:
POST

Engine
type
4
:
2
.2
liter
engine

Body
type
K
:
Station
Wagon

Line
B
:
SUBARU
B
line

Plant
of
manufacture

Plant
of
manufacture
Type
of
vehicle

SIA

I
4S3
~
Passenger
car
I

Vehicle
attributes
Check
digit
Vehicle
identification

BK
495
X
T
83
0200
1
[

TT
I
T
T
ITT
Z
Stop
mark

2

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[Tiq2]
2-

1
.
General

1~
Engine
control
module
(ECM)
~
Radiator
fan

~2
Ignition
coil~s
Radiator
fan
relay

~3
Ignitqr
~s
Pressure
sources
switching
solenoid
valve

~4
Crankshaft
position
sensor
~
Knock
sensor

~5
Camshaft
position
sensor
~
Back-pressure
transducer

Throttle
position
sensor
~s
Front
oxygen
sensor

~7
duel
injectors
~o
Rear
oxygen
sensor
(Except
California
model)

~8
Pressure
regulator
~
Pressure
sensor

Engine
coolant
temperature
sensor
~z
A/C
compressor

~o
Mass
air
flow
sensor
~
Inhibitor
switch

Idle
air
control
solenoid
valve
~
CHECK
ENGINE
malfunction
indicator
lamp
(MIL)

~z
Purge
control
solenoid
valve
~
Tachometer

0
Fuel
pump
~s
A/C
relay

0
PCV
valve
~
A/C
control
module

~s
Air
cleaner
~eIgnition
switch

Canister
~
Transmission
control
module
(TCM)

~
Main
relay
~o
Vehicle
speed
sensor
2

~a
Fuel
pump
relay
~
Data
link
connector
(For
Subaru
select
monitor)

~s
Fuel
filter
@
Data
link
connector
(For
Subaru
select
monitor
and

~o
Front
catalytic
converter
OBD-II
general
scan
tool)

Rear
catalytic
converter
@
Two
way
valve

~2
MGR
valve
~a
Rear
oxygen
sensor
(California
model
only)

EGR
control
solenoid
valve
~
Filter

3

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

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

2-7
[T3C48]
ON-BOARD
DIAGNOSTICS
II
SYSTEM
3
.
Diagnosis
System

E-4AT
(F00)

4WD
1993

G3M0723

Probable
cause
(if
outside"specifieddata")
48
.
FUNCTION
MODE
:
F00

-
MODE
DISPLAY
-

SPECIFIED
DATA
:

Data
at
the
left
shouldbe
indicated
.

1
.
Communication
failure
(1)
Check
loose
or
poor
connectors,
or
(No
communication
method
can
be
confirmed

with
power
ON
.)
(2)

shortcircuit
.

Check
type
of
cartridge
.

2
.
Vehicle
types
cannot
be
identified
(due
to

communication
failure)
.

VB
(F01)

12
.7
V

OBD0673

1
.
Battery

1
2
.
Charging
system

Check
improper
cartridge
.
Replace
with
proper
one
.

49
.
FUNCTION
MODE
:
F01

-
BATTERY
VOLTAGE
(VB)
-

CONDITION
:

(1)
Ignition
switch
ON

(2)
Engine
idling
after
warm-up

SPECIFIED
DATA
:

(1)
12±1
V

(2)
13
±
1
V

Check
battery
voltage
and
specific
gravity
of

electrolyte
.

(1)
I
Measure
regulatingvoltage
under
no
loads
.

(2)
Check
generator
(as
asingle
unit)
.

34

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

I
ST
I

1-1
ooaao0000000000oaooo

OBD0669A
I

ST2

00000
I
0
0
(03C03
0

~
00000
;
i~~
C01-

ST1

OBDD057A

9
Using
data
link
connector
for
Subaru
select
monitor

and
OBD-II
general
scan
tool
:

(1)
Connect
ST
to
Subaru
select
monitorcable
.

ST
498357200
ADAPTER
CABLE

(2)
Open
the
cover
and
connect
Subaru
select
moni-

torto
data
link
connector
located
in
thelower
portion

of
the
instrument
panel(on
the
driver'sside),to
the

lower
cover
.

CAUTION
:

Do
not
connect
scan
tools
except
for
Subaru
select
mon-

itor
and
OBD-II
general
scan
tool
.

6)
Turn
ignition
switch
to
ON
(engine
OFF)
and
Subaru

select
monitor
switch
to
ON
.

7)
Start
the
engine
.

NOTE
:

Ensure
the
selector
lever
is
placed
in
the
"P"
position

before
starting
.

8)
Using
the
selector
lever
or
shift
lever,
turn
the
"P"
posi-

tion
switch
and
the
"N"
position
switch
to
ON
.

9)
Depress
the
brake
pedal
to
turn
the
brake
switch
ON
.

10)
Keep
engine
speed
in
the
2,500-3,000
rpm
range
for

40
seconds
.

NOTE
:

On
models
without
tachometer,
usethe
Subaru
select

monitor
or
tachometer
(Secondary
pickup
type)
.

11)
Place
the
selector
lever
or
shift
lever
in
the
"D"
posi-

tion
and
drive
the
vehicle
at
5
to
10
km/h
(3to
6
MPH)
.

NOTE
:

On
AWD
vehicles,
release
the
parking
brake
.

F
:
COMPULSORY
VALVE
OPERATION
CHECK

MODE

1
.
SUBARU
SELECT
MONITOR

1)
Prepare
Subaru
select
monitor
and
cartridge
.

ST1
498307500
SELECT
MONITOR
KIT

ST2
498345700
CARTRIDGE

39

2-7
(T6A1]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

6
.
Wiring
Diagram
and
Wiring
Harness

Combination
mete

Tachometer
il0
:e

i
12
:
b

Malfunction
I
il4
:c
indicator
~--
lamp

Speedometer
circuit

ill

Main
relay
~`1
o
B47
Twi
sted
wire

0

846
E

:~~M
R
Fuel
pump
relay

6
.
Wiring
Diagram
and
Wiring
Harness

A
:
WIRING
DIAGRAM

1
.
ENGINE
ELECTRICAL
SYSTEM

To
Power
Supply
Routing

FB-20
~

FUSE
Na
15

MB-3

SBF-2

FB-4

FUSE
Na
l6

ST

IG
SW

FB-22

FUSE
Na
15
I2
B37

i3
B39

S
.
M
.
J
.
[Refer
to
foldout
page
.)

R58R57RIS

Fuel
pump

Inhibitor
switch

812
F45
B62

Check
connector
a
v
879

mvov-~o
M
PPm
M
f~
vrn
f~
Om
.O

Enginecontro
I
B84
module

14001

B97B17

Rl

Vehicle
speed
sensor
2

g7
(B
I
ac
k)
i
It
(g
)(Green)
Rl5
(B
I
ec
k)
R58

1212
123
34
3456
456

i
14
(L
1
ght
gray)
I101l2
(L
I
ght
gray)

12345678910111213
123456789101111314116

50

B47
(Brown)
B12
(Gray)

1
2
1
23
4345
67
8
5
69
1011
12

F45
B79
(Gray)

1
23
4567
8
910
11121R314

(2
i3
(Brown)

2345
6789
1234
678910
1'1
11
1
1
1
13
1
14
1
15
1
16
1
17
1
18
1
19
1
20,011
1
12
1
13
1
14
1
1
51
16
1
17
1
18
1
19
1
20
1
21
1
22
1

BUR10-02A

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[Tsn2i
2-7

6
.
Wiring
Diagram
and
Wiring
Harness

FWD
switch
(AWD)

B9
ffl

Droppig
Cruise
resistor
cont
rol
modu
le

OBD-II
Data
link
serviceCheck
connectorconnectorconnector

B78
ERB40
0
B79
m
B4
E
K
E
)

w
7
OEs
o
-
-
-
------------------
-
------
-
-
L
a
....

c
H
0
U
It

C
Y
0
.N
;W
Rr
06
N

BI1
T41
Ref
.
to
/Engine
electrical
system
.

a
:
B54

b
:
B55

c
:
856

She
ild
joint
connector
884

~

WK
LZIM
WL

B53
Engine
control
B9(B
I
ac
k)
module
1
2

854
(B
I
ac
k)
B79
(Grey)

1
23456
1
23
45
67
7
1
8
1
9101112
8
910
1112
1
13
1
14
r,

Bll
(Grey)
(B
I
ac
k)
B56894
(B
I
aCk)

34

S

78

D

q
Oil
2
9
Pl
.
12131415,91617
la19
110
I
5
16
1
3
14
1111121131141151161171161191201

AT
contro
I
------------
a
,,
Vehicle
speed
i(Transmission)
___
_____
__
__
sensor
1

ATF
temperature
sensor
Line
pressuresolenoid

Lock-up
solenoid

AWD
solenoid

Shift
solenoid
1

Shift
solenoid
2

Shift
solenoid
3

R3
Throttle
~-Cz'1
R~l
position
sensor

B2l
E2
El3

O
(Gray)
E13
(Brown)
853
B78
(Y
e
II
ow)

12
123
1234
56789

B55
(B
I
ack)
(
ED
(Grey)

12345678
12345678
9~011t213141St6
91111213141516

864
(L
i
ght
b
I
ue)

12
345678
9l0
lll21314
1516
I7l8l9
20
2122
23
24
2627282930
3132
3334
35
3637383940
4142
43
44
454647
1
48
1
49
~
0
1
51
2
15
3
15
4
~
5
1
56
15
7
8596061626364656667686970
7172
73
1
74
1
75
1
76
1
77
78
1
79
1
60
1
81
B
1
132
1
83d
8485
86
87888990
9192
93
94
9596

BUR41-02B

55

2-7
[T8A0]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

8
.
Diagnostics
for
CHECK
ENGINE
Malfunction
Indicator
Lamp
(MIL)
8
.
Diagnostics
for
CHECK
ENGINE

Malfunction
Indicator
Lamp
(MIL)

A
:
CHECK
ENGINE
MALFUNCTION

INDICATOR
LAMP
(MIL)
DOES
NOT
COME
ON
.

WIRING
DIAGRAM
:

Combination
meter

14

1pition

No
.
15
switch

ECM

884

9
11
12
1314
U
1
16
10
3637
383940
4142
4344
3132
333435
58
5960
616263
646566676897084
85
868788
89909192
93949596

i2

1
345
678910
1112
13141516171819
20
2122

COC-A
CI
1
')=
.

i14

1
1
1
2
1
3
1
4
1
5
1
6f7f8
]
9
1
10
1
11
1
12
1
131

B2M0507

NOTE
:

For
the
diagnostic
procedure
on
indicator
lamp
(MIL)

does
not
go
on,
referto
2-7
[T7A0]*2
.

58

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TBSO]
2-7
8
.
Diagnostics
for
CHECK
ENGINE
Malfunction
Indicator
Lamp
(MIL)

B
:
CHECK
ENGINE
MALFUNCTION

INDICATOR
LAMP
(MIL)
DOES
NOT
GO
OFF
.

WIRING
DIAGRAM
:

Combination
meter

884837

ECM
~{------(

u

884

9
1
12
l.
.f
1314
1
1610
1
6
37
383940
4142
4344
3132
33
34353859
606162
63
64
65666689708485
86
8188
8990
9192
93949596

i2

12345
67
910
16171819202122
1112131415

i14

1
1
1
2
1
3
1
4
1
5
1
6M78
9
1
10
1
11
1
12
-
ti
-
31

B2M0507

NOTE
:

For
the
diagnostic
procedure
on
indicator
lamp
(MIL)

does
not
go
off,
referto
2-7
[T7B0]*2
.

59