1996 SUBARU LEGACY Engine

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
[T3C54]
2-7

3
.
Diagnosis
System

18
m/h

G3M0725

VSP2
(F04)

12
m/h

G3M0726

EREV
(F06)

1,500
rpm

G3M0727

ATFT
deg
F
(F07)

176
deg
F

G3M0728

THV
(F09)

4
.0
V

G3M0935

50
.
FUNCTION
MODE
:
F02

-
VEHICLE
SPEED
SENSOR
1
(VSP1)
-

"
F02
:
Vehicle
speed
is
indicated
in
mile
per
hour
(m/h)
.

"
F03
:
Vehicle
speed
is
indicated
in
kilometerper
hour

(km/h)
.

51
.
FUNCTION
MODE
:
F04

-
VEHICLE
SPEED
SENSOR
2
(VSP2)
-

"
F04
:
Vehicle
speed
is
indicated
in
mile
per
hour
(m/h)
.

"
F05
:
Vehicle
speed
is
indicated
in
kilometer
per
hour

(km/h)
.

52
.
FUNCTION
MODE
:
F06

-
ENGINE
SPEED
(EREV)
-

53
.
FUNCTION
MODE
:
F07

-
ATF
TEMPERATURE
SENSOR
(ATFT)
-

"
F07
:
ATF
temperature
is
indicated
in
"deg
F"
.

"
F08
:
ATF
temperature
is
indicated
in
"deg
C"
.

54
.
FUNCTION
MODE
:
F09

-
THROTTLE
POSITION
SENSOR
(THV)
-

35

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

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T3F1]
2-7

3
.
Diagnosis
System

SELECT
SYSTEM

EGi
Y
:O,N
:/

~
101

H2M
1149
I

0000
~o

a~a~o
e
sA
e1

n
F03
1-01
Fol
0
4567
/

Fol
FE-11
0
F-01
no
0
23
ENT

F

F

0100on
10-1

SuBARU
G3MO152]

EGR
SOL
(
FD
05
)

O
:Y
1
:N

82M0650

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

tor
to
data
link
connector
located
in
the
lower
portion

of
the
instrument
panel(on
the
driver's
side),
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)
Select
engine
mode
using
function
key
.

Press
thefunction
key
[0]
.

8)
Designate
mode
using
function
key
.

Refer
to
"6
.
READDATA
FUNCTIONKEY
LIST
FOR

ENGINE"
2-7
[T3C6]*4
.

(Example
:
Press
[F]
[D]
[0][5]
[ENT]
in
that
order
.)

9)
Ensure
displayed
message
.

41

2_7
[T501]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

5
.
Specified
Data

5
.
Specified
Data

1
.
ENGINE
CONTROLMODULE
(ECM)
I/O
SIGNAL

++u++u++u++u
++~~
++++

1
1
0

to
B84

9
11
1
8
1
7
11
6
1
5
1
1
4
1
3
1
U

44
4
8
7
7525B8584
161
u1
1

4443~
2
~
$Q
7$
9
~
8~
7
~

u
1
11
u
1
9
u

7
33
3231

6~
5
1

u
8
7

322

7
u
6
5
2222

43251
0
u

2

4
32
1

2121
11

6

OBD0092A

Signal
(V)

Content
Connector
Terminal
Ignition
SW
ON
Note
No
.
No
.
Engine
ON
(Idling)
(Engine
OFF)

Crankshaft
Signal
(+)884
8
0
-7-
+7
Sensor
output
waveform

position
Signal
(-)
B84
29
00
-

sensor
Shield
B84
54
00
-

Camshaft
Signal
(+)B84
70
-7-
+7
Sensor
output
waveform

position
Signal
(-)
B84
28
0
0
-

sensor
Shield
B84
5400
-

Mass
air
Signal
B84
5
0-0
.3
0
.8-
1.2
-

flow
Shield
B84
5700
-

sensor
GND
B84
2000
-

Fully
closed
:
0
.2
-
1
.0

Throttle
Signal
B84
6
Fully
opened
:
4
.2
-
4
.7

position
Power
B84
21
55
-
sensor
supply

GND
B84
2000
-

Front
Signal
B84
230
0-0
.9
-
oxygen

sensor
Shield
B84
56
00
-

Rear
Signal
B84
240
0-0
.9
-
oxygen

sensor
Shield
B84
56
0
0
-

Engine
coolant
BS4
22
1
.0-1
.41
.0-1
.4
After
warm-up
re
sensor
temperature

"5"
and
"0"
are
repeatedly
speed
sensor
B84
830or50or5
displayed
when
vehicle
is

driven
.

165
u
1
1
u
2
11
uuuuu2
1

7
3
333
31
3
2
2
22
2
2
2
2
21
1
1
1
7
4
2
1

44

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[TSO1]
2-7
5
.
Specified
Data

C
t
T
il
Signal
(V)

Content
onnec
or
erm
na
Ignition
SW
ON
Note
No
.
No
.
Engine
ON
(Idling)
(Engine
OFF)

Starter
switch
B84
8600
Cranking
:
8
to
14

A/C
switch
B84
60
ON
:
10
-
13
ON
:
13
-
14

OFF
:
0
OFF
:
0

Ignition
switch
B84
85
10-13
13-
14
-

Neutral
position
switch
B84
82
ON
:
0
Switch
is
ON
when
shift
isin
"
"
OFF
:
5
.0f0
.5
"N
or
"P
position
.

Test
mode
connector
884
84
55
When
connected
:
0

Knock
Signal
B84
32
.8
2
.8
-

sensor
Shield
B84
56
00
-

AT/MT
identification
B84
81
55
When
measuring
voltage

between
ECM
and
body
.

Back-up
power
supply
B84
39
10-1313-14
Ignition
switch
"OFF"
:
10
-
13
Control
unit
power
1
supply
B84

2
10-13
13-14
-

Ignition
#
1,
#
2
B84
41
0
1
-3
.4
-

control
#
3,
#
4
B84
400
1
-3
.4
-

#
1
B84
96
10-13
1-14
Waveform

Fuel
#
2
B84
70
10-13
1-14
Waveform

injector
#
3
B84
44
10-13
1-14
Waveform

#
4
B84
16
10-13
1
-14
Waveform

Idle
air
OPEN
endB84
14
-
1
-13
Waveform
control

solenoid
CLOSE
B84
13
-
13-1
Waveform
valve
end

Fuel
pump
relay
g84
32
ON
:
0
.5,
or
less0
.5,
or
less
-
control
OFF
:
10
-
13

A/C
relay
control
B84
31
ON
:
0
.5,
orless
ON
:
0
.5,
or
less
OFF
:
10
-
13
OFF
:
13
-
14

Radiator
fan
relay
1
ON
:
0
.5,
or
less
ON
:
0
.5,
or
less

control

B84
74
OFF
:
10
-
13
OFF
:
13
-
14

Radiator
fan
relay2

B84
73

ON
:
0
.5,
or
less
ON
:
0
.5,
or
less
With
A/C
vehicles
only
control
OFF
:
10
-
13
OFF
:
13
-
14

Self-shutoff
control
B84
63
10-13
13-14
-

Malfunction
indicator
B84
58Light
"ON"
:
1,
or
less

lamp
Light
"OFF"
:
10
-
14

Engine
speed
output
B84
64
-
0
-
13,
or
moreWaveform

Torque
control
signal
B84
79
5
5
-

Mass
air
flow
signal
B84
47
0-0
.3
0
.8-
1
.2
-

Purge
control
solenoid

B84
72

ON
:
1,
or
less
ON
:
1,
or
less

valve
OFF
:
10
-
13
OFF
:
13
-
14

Atmospheric
pressure
B84
263
.9-4
.1
2
.0-2
.3
-
sensor

Pressure
sources
ON
:
1,
or
less
ON
:
1,
or
less
switching
solenoid
B84
15
OFF
:
10
-
13
OFF
:
13
-
14valve

EGR
solenoid
valve
B84
71
ON
:
1,
or
less
ON
:
1,
or
less

OFF
:
10
-
13
OFF
:
13
-
14
Front
oxygen
sensor
g84
38
0-1
.0
0-1
.0
-
heater
signal

45

2-7
tT5o21
ON-BOARD
DIAGNOSTICS
II
SYSTEM
5
.
Specified
Data

CT
il
Signal
(V)

Content
onnector
erm
na
I9nition
SW
ON
Note
No
.
No
.
(Engine
OFF)Engine
ON
(Idling)

Rear
oxygen
sensor
B84
37
0-1
.0
0-1
.0
-
heater
signal

AT
diagnosis
input
B84
80
Less
than
1
.-
.
More
Less
than
1
+-+
MoreWaveform
signal
than4
than
4

GND
(sensors)
B84
200
0
-

i
B
469
GND
(
njectors)
80
0
-
95

GND
(ignition
system)
B84
940
0
-

ND
l
B
4
19
(powersupp
y)
G
800
-
46
17
GND
(control
systems)
B84
00
-
18

GND
(oxygen
sensor
B84
4200
heater)

2
.
ENGINECONDITION
DATA

Content
Specified
data

i
fl
M
1.7
-
3
.3
(g/sec)
:
Idling
r
ass
a
ow
7
.1
-
14
.2
(g/sec)
:
2,500
rpm
racing

E
il
d
1.6
-
2
.9
(%)
:
Idling
ng
neoa
6
.4
-
12
.8
(%)
:
2,500
rpm
racing

Measuring
condition
:

"
After
warm-up
theengine
.

"
Gear
position
is
in
"N"
or
"P"
position
.

"
A/C
is
turned
OFF
.

All
accessory
switches
are
turned
OFF
.

46

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