display SUBARU LEGACY 1996 Service Repair Manual

2-7
[T3C2]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

SELECT
SYSTEM

EGi
Y
:O,N
:/

1
101

H2M1149
I

=0=1
1H]

D
E
F
T

aor0l
oo
L

oo0
RD
FE-11
456
7

F111
0
0
F1_31
a

F03
0
FL-11
ED101

SUBARU
03M0152
I

OBD
(FB
1)

PO100


Diagnostic
trouble
code
Abbreviation

osooos2

OBD
(FB
1)

PO
115


OBD
(FBI)

P0120
<
THV
>

OBD0063

5)
Turn
ignition
switch
to
ON
(engine
OFF)
and
Subaru

select
monitor
switch
to
ON
.

6)
Using
Subaru
select
monitor,
call
up
diagnostic
trouble

code(s)
and
various
data,
then
record
them
.

2
.
READ
DIAGNOSTIC
TROUBLE
CODE
(DTC)
SHOWN

ON
DISPLAY
.
(MODE
FB1)

1)
Select
engine
mode
using
function
key
.

Press
thefunction
key
[0]
.

2)
Designate
mode
using
function
key
.

Press
[F]
[B]
[1]
[ENT]
in
that
order
.

3)
Ensure
diagnostic
trouble
code(s)
is
shown
.

(1)
When
there
is
only
one
diagnostic
trouble
code
.

(2)
When
there
are
multiple
diagnostic
trouble
codes
.

NOTE
:

For
details
concerning
diagnostic
trouble
codes,
referto

the
DIAGNOSTIC
TROUBLE
CODE
(DTC)
LIST,
2-7

[T11A0]*4
.

14

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[T3C4]
2-7

3
.
Diagnosis
System

SELECT
SYSTEM

EGi
Y
:O,N
:/

~
101

H2M1149
I

OO~O
~o

C0
EFT

01ED
ED
[1-:11
Q
a
sAe
1

FE1
oooa
4
567/

0
FolF01
F01
F-01
0
F
23
ENT

F

E

0_1

j

F01FUTF01

SUBARU
G3M0152
I

SELECT
SYSTEM

EGi
Y
:O,N
:/

1
101

H2M11491

oaoo
Eo

co
eF?

F01
F-01
[E-11
F01
[1-
:11
as
n
s1

ooFol
Fol
a
4
5
6
7

00
FLJJ
DFEJ
00

aa~ar

SUBARU
G3M0152I

FFCODE
(
FB2
)

NO
TROUBLE

B2M0474

3
.
READ
CURRENT
DATA
SHOWN
ON
DISPLAY
FOR

ENGINE
.
(FUNCTION
MODE)

1)
Select
engine
mode
using
function
key
.

Press
thefunction
key
[0]
.

2)
Designate
mode
using
function
key
.

Refer
to
"6
.
READ
DATAFUNCTION
KEY
LIST
FOR

ENGINE"
2-7
[T3C6]*4
.

(Example
:
Press
[F]
[0]
[1]
[ENT]
in
that
order
.)

3)
Ensure
data
of
input
or
output
signal
is
shown
.

4
.
READ
FREEZE
FRAME
DATA
SHOWN
ON
DISPLAY
.

(MODE
FB2)

1)
Select
engine
mode
using
function
key
.

Press
thefunction
key
[0]
.

2)
Designate
mode
using
function
key
.

Press
[F]
[B]
[2]
[ENT]
in
that
order
.

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

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

cleared
.

15

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

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
ITscas1
2-7

3
.
Diagnosis
System

36
.
FA
MODE
FOR
ENGINE

Function

mode
LED
No
.
Contents
Display
LED
"ON"
requirements

3Neutral
switch
NT
When
neutralposition
signal
is
entered
.

7Test
mode
connector
UD
When
test
mode
connector
is
connected
.
FAO
8
AT/MT
identification
signal
AT
When
AT
identification
signal
is
entered
.

9
Ignition
switchIG
When
ignition
switch
is
turned
ON
.
1
Radiator
fan
relay
2
R2
When
radiator
fanrelay2
isin
function
.

2
Knock
signal
KS
When
knock
signal
is
entered
.

3
Purge
control
solenoid
valve
CNWhen
purge
control
solenoid
valve
is
in
func-

tion
.
FA1
4Fuel
pump
relay
FP
When
fuel
pump
relay
isin
function
.

6
Radiator
fanrelay
1
R1
When
radiator
fanrelay
1
isin
function
.

7
Air
conditioner
relay
ARWhen
air
conditioner
relay
isin
function
.

8
Air
conditioner
switch
ACWhen
air
conditioner
switch
is
turned
ON
.

2
AEC
signal
ECWhen
AEC
signal
is
entered
.

3
EAM
signal
AM
When
EAM
signal
is
gone
out
.

FA2
4
AEB
signal
EB
When
AEB
signal
is
entered
.

6
AET
signal
ET
When
AET
signal
is
entered
.

7
Engine
torque
control
signal
TR
When
engine
torque
control
signal
is
entered
.

FA3
7
Pressure
sources
switching
solenoid
valve
BR
When
pressure
sources
switching
solenoid

valve
is
in
function
.

1
Catalyst
CA
When
diagnosis
of
catalyzer
is
finished
.

2
EGR
system
E1
When
diagnosis
of
EGR
system
is
finished
.

FA4
3
California
model
identification
signal
FC
When
California
model
identification
signal
is

entered
.

8
Rear
oxygen
sensor
signal
OR
When
rear
oxygen
sensor
mixture
ratio
is
rich
.

9Front
oxygen
sensor
signal
02
When
front
oxygen
sensor
mixture
ratio
is

rich
.

FA5
7
EGR
solenoid
valve
ER
When
EGR
solenoid
valve
is
in
function
.

27

Z-T
[T3C37]
ON-BOARD
DIAGNOSTICS
II
SYSTEM

3
.
Diagnosis
System

LED
No
.
Signal
name
Display

1
-
-

2
-
-

3Neutralswitch
NT

4
--

5
--

s
--

7
Test
mode
connector
LID

8
Identification
of
AT
model
AT

9
Ignition
switchIG

r
0

-
-
NT
--

-
LID
AT
IG
-

ooooa

LEDNo
.
Signal
name
Display

1
Radiator
fan
relay
2
R2

2
Knock
signal
KS

Purge
control
solenoid

valve
CN

4
Fuel
pump
relay
FP

5
-
-

6
Radiator
fan
relay
1
R1
7
A/C
relay
AR

8
A/C
switch
AC

9
--

o
--

R2
KSCN
FP
-

R1
ARAC
--

37
.
FUNCTION
MODE
:
FAO

-
ON
H
OFF
SIGNAL
-

Requirement
for
LED
"ON"
.

LED
No
.
3
Shift
position
is
in
"P"or
"N"
.

LED
No
.
7
Test
mode
connector
is
connected
.

LED
No
.
8
Vehicle
is
AT
model
.

LED
No
.
9
Ignition
switch
is
turned
ON
.

38
.
FUNCTION
MODE
:
FA1

-
ON
H
OFF
SIGNAL
-

Requirement
for
LED
"ON"
.

LEDNo
.
1
Radiator
fan
relay
2
is
turned
ON
.

LEDNo
.
2
Engine
is
knocking
.

LED
No
.
3
Purge
control
solenoid
valve
is
in
function
.

LED
No
.
4
Fuel
pump
relay
is
turned
ON
.

LED
No
.
6
Radiator
fan
relay
1
is
turned
ON
.

LED
No
.
7
A/C
relay
is
turned
ON
.

LED
No
.
8
A/C
switch
is
turned
ON
.

NOTE
:

9
When
LED
No
.
1,3,
4,
6
and
7
blinks
with
the
test
mode

connector
connected
and
the
ignition
switch
turned
to

ON,
the
corresponding
part
is
functioning
properly
.

e
When
LED
No
.
4
illuminates
for
only
2
seconds
after
the

ignition
switch
is
turned
to
ON,
(and
then
goes
out),
the

corresponding
part
is
functioningproperly
.

28