SUBARU LEGACY 1996 Service Owner's Guide

2-7
[T3C5]
ON-BOARD
DIAGNOSTICS
11
SYSTEM

3
.
Diagnosis
System

1

LOAD_F
(
FB2
)

PO100
10
.0%

2
B2M0634
LOAD_F
(FB2
)

PO100
10
.0%

1o1

TW_F
(FB2
)

P0100
80-C

[1l

5

VSP_F
(FB2
)

PO
100
40km/h

B2M0671

SELECT
SYSTEM

EGi
Y
:O,N
:/

1
[01

H2M1149I

00=E,o

C
D
EFT

0
1E_
1
aao
1

11-:11F131
00
a
456
7/

a
FE-11
0
0a

aoaao

SuBARU
G3M0152I

(2)
When
some
trouble
is
detected
.

Abbreviation

~2
Diagnostic
trouble
code
of
trouble
occurred

NOTE
:

Other
freeze
frame
data
is
shown
on
display
by
pushing

thefunction
key
[J,]
.

5
.
READ
FREEZE
FRAME
DATA
SHOWN
ON
DISPLAY
.

(MODE
FB3)

NOTE
:

e
For
items
and
contents
shown
on
display,
referto
"6
.

READDATA
FUNCTION
KEY
LIST
FOR
ENGINE"
2-7

[T3C6]*4
.

9
Freeze
frame
data
will
not
erasewithout
clearing
mem-

o
ry
.

1)
Select
engine
mode
using
function
key
.

Press
thefunction
key
[0]
.

2)
Designate
mode
using
function
key
.

Press
[F][B]
[3]
[ENT]
in
that
order
.

16

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T3csi
2-7

3
.
Diagnosis
System

D
I
AG
.
I
(FB3
)

NO
TROUBLE

82M0636

D
I
AG
.
I
(FB3
)

NO
TROUBLE

B2M0636

1

QA_F
(FB3
)

P0100
4
.
5
SV

2
B2M0638

QA_F
(
FB3
)

PO100
4
.5
5V

EGR
(
FB3
)

P0403
Low

82M0649

3)
Ensure
freeze
frame
data(s)
is
(are)
shown
.

(1)
When
no
trouble
is
detected,
or
after
memory
is

cleared
.

(2)
When
a
trouble
occurs
butthe
corresponding
item

is
not
displayed
.

(3)
When
only
one
trouble
corresponding
to
the
dis-

played
item
has
occurred
.

T
Abbreviation

~2
Diagnostic
trouble
code
of
trouble
occurred

(4)
When
multiple
troubles
corresponding
to
the
dis-

played
item
are
detected
.

NOTE
:

Freeze
frame
data
is
shown
on
display
for
2
seconds
at
a

time
.

17

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
[T3C7]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

82M0476

7
.
FUNCTION
MODE
:
F00

-
ROM
ID
NUMBER
(YEAR)
-

CONDITION
:

Ignition
switch
"ON"
SPECIFIED
DATA
:

Presentation
display

Probable
cause
(Item
outside"specifieddata")

1
.
Error
1

2
.
Error2

vB
(F01)

12
.4
V

B2M0270

Probable
cause
(Item
outside
"specified
data")

1
.
Battery

1
2
.
Charging
system

1
3
.
Power
supply
line

Check
for
loose
or
disconnected
connector,
and

discontinued
circuit,
etc
.

Check
for
poor
contact
of
cartridge,
or
different

type
cartridge
.

8
.
FUNCTION
MODE
:
F01

-
BATTERY
VOLTAGE
(VB)
-

CONDITION
:

(1)
Ignition
switch
"ON"

(2)
Idling
after
warm-up

SPECIFIED
DATA
:

(1)
111
V

(2)
13
f
1
V
Check
battery
voltage
and
electrolyte's
specific

gravity
.

"
Check
regulating
voltage
.
(On
no-load)

Check
alternator
.

o
Check
main
relay
.
<
Ref
.
to
[T9C0]
.*4>

*
Check
harness
connector
of
ECM
power
supply

line
.
.
to
[T9C0]
.*4>

20

[T3C13]
2-7
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

VSP
(F02)

24km/
h
15MPH

B2M0754

EREV
(F03
)

1500
rpm

B2M0478

TW
(F04)

800C
176
°
F

B2M0479

ADVS
(F05
)

15
deg

B2M0480

QA
(
F06
)
1
.
67g
l
s
2
.
02V

82M0481

9
.
FUNCTION
MODE
:
F02

-
VEHICLE
SPEED
SIGNAL
(VSP)
-

9
Vehicle
speed
is
indicated
in
kilometerper
hour
(km/h)

and
mile
per
hour
(MPH)
at
the
same
time
.

10
.
FUNCTION
MODE
:
F03

-
ENGINE
SPEED
SIGNAL
(EREV)
-

11
.
FUNCTION
MODE
:
F04

-
ENGINE
COOLANT
TEMPERATURE
SIGNAL
(TW)
-

~
Engine
coolant
temperature
is
indicated
in
"°C"
and

"°F"
at
the
same
time
.

12
.
FUNCTION
MODE
:
F05

-
IGNITION
SIGNAL
(ADVS)
-

NOTE
:

The
ignition
timing
value
displayed
in
mode
F05
is
a
value

computed
by
ECM
and
will
not
alwayscorrespond
with
the

value
measured
with
a
timing
light
.

13
.
FUNCTION
MODE
:
F06

-
MASS
AIR
FLOW
SIGNAL
(QA)
-

Mass
air
flow
and
voltage
input
from
mass
air
flow

sensorare
shown
on
display
at
the
same
time
.

21

2-7
[T3C14]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

THV
(F07
)

0%
0
.
21V

82M0482
TIM
(
F08
)

2
.
82
mS

B2M0483

ISC
(F09)

35.7

B2M0484

LOAD
(F10)

10
.0

B2M0485

02
(1`11)

0
.
60
V

B2M0486

14
.
FUNCTION
MODE
:
F07

-
THROTTLE
POSITION
SIGNAL
(THV)
-

*
Throttleposition
is
indicated
in
percentage
(%)and

voltage
(V)
at
the
same
time
.

NOTE
:

Be
sure
that
the
displayed
value
changes
smoothly
when

changing
throttle
valve
from
fully
closed
to
fully
opened
.

15
.
FUNCTION
MODE
:
F08

-
INJECTOR
PULSE
WIDTH
(TIM)
-

16
.
FUNCTION
MODE
:
F09

-
IDLE
AIR
CONTROL
SIGNAL
(ISC)
-

17
.
FUNCTION
MODE
:
F10

-
LOADDATA
(LOAD)
-

18
.
FUNCTION
MODE
:
F11

-
FRONT
OXYGEN
SENSOR
OUTPUT
SIGNAL
(02)
-

22

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T3C23]
2-7

3
.
Diagnosis
System

02max
-
min
(
F
12
)

0
.
80V
0
.
10v

BMW

R02
(F13)

0
.
60
V

B2M0488

R02max
-
min
(F14)

0
.
80V
0
.
10V

82M0489

ALPHA
(F17)

0
.8

B2M0490

KNOCK
(F19)

3
.
0deg

82M0491

19
.
FUNCTION
MODE
:
F12

-
FRONT
OXYGENSENSOR
MAXIMUM
AND

MINIMUM
OUTPUT
SIGNAL
(F02MAX
-
MIN)
-

Front
oxygen
sensor
maximum
andminimum
output

signals
are
indicated
at
the
same
time
.

20
.
FUNCTION
MODE
:
F13

-
REAR
OXYGENSENSOR
OUTPUT
SIGNAL
(R02)
-

21
.
FUNCTION
MODE
:
F14

-
REAR
OXYGEN
SENSOR
MAXIMUM
AND
MINIMUM

OUTPUT
SIGNAL
(R02MAX
-
MIN)
-

oRear
oxygen
sensor
maximum
and
minimum
output
sig-

nals
are
indicated
at
the
same
time
.

22
.
FUNCTION
MODE
:
F17

-
SHORTTERM
FUEL
TRIM
[A/F
CORRECTION

COEFFICIENT]
(ALPHA)
-

23
.
FUNCTION
MODE
:
F19

-
KNOCK
SENSOR
SIGNAL
[IGNITION
TIMING

CORRECTION
COEFFICIENT]
(KNOCK)
-

23

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-BOARS
DIAGNOSTICS
II
SYSTEM
[T3C33]
2-7

3
.
Diagnosis
System

F02H
I

1
.
00
A

B2M0497

R02H
(
F33
)
1
.
00
A

B2M0498
MF1
(F36
)

B2M0499

MF2
(
F37
)

0

B2M0500

MF3
(F38)

0

82M0501

29
.
FUNCTION
MODE
:
F32

-
FRONT
OXYGEN
SENSOR
HEATER
CURRENT

(F02H)
-

30
.
FUNCTION
MODE
:
F33

-
REAR
OXYGENSENSOR
HEATER
CURRENT

(R02H)
-

31
.
FUNCTION
MODE
:
F36

-
MAXIMUM
VALUE
OF
CYLINDER
#1
MISFIRE
RATE

DURING
100
ROTATIONS
(MF1)
-

32
.
FUNCTION
MODE
:
F37

-
MAXIMUM
VALUE
OF
CYLINDER
##2
MISFIRE
RATE

DURING
100
ROTATIONS
(MF2)
-

33
.
FUNCTION
MODE
:
F38

-
MAXIMUM
VALUE
OF
CYLINDER
#3
MISFIRE
RATE

DURING
100
ROTATIONS
(MF3)
-

25