check engine SUBARU LEGACY 1996 Service Owner's Guide

AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL
[T7H3]
3-2

7
.
Diagnostic
Chart
with
Trouble
Code

B54
123456
7
8
9
01112

D

L
.0
Q
0>

B3M02248

B54

161514
3
H87
1211
10
9

D

_E)VSj

83M0222B

Data
link
connector
(for
Subaru
select
monitor
and
OBD-II
general
scan
tool)

/
'
/
i
Data
link
connector
(for
Subaru
select
monitor
\
,only)

ls%y~
x~/

OBD0145A
I

AFM
(F15)

0
.6V

B3M0370

2
.
CHECK
HARNESS
CONNECTOR
BETWEEN
TCM

AND
ECM
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connectors
from
TCM
and
ECM
.

3)
Measure
resistance
of
harness
connector
between

TCM
and
ECM
.

Connector
&
terminal
I
Specifiedresistance
:

(B54)
No
.
9
-
(B84)
No
.
47
l
1
S2,
orless

4)
Measure
resistance
of
harness
connector
between

TCM
and
body
to
make
sure
that
circuit
does
not
short
.

Connector
&
terminal
/
Specified
resistance
:

(854)
No
.
9
-
Body
11
MSZ,
or
more

3
.
CHECK
INPUT
SIGNAL
FOR
TCM
.

1)
Connect
connectors
to
TCM
and
ECM
.

2)
Start
the
engine
.
(engine
idling
after
warm-up)

3)
Measure
signal
voltage
between
TCM
connector
termi-

nal
and
body
.

Connector
&
terminal
/
Specified
voltage
:

Engine
warm-up
;

(B54)
No
.
9
-
Body
l
0
.5
-
1
.22
V
9
Using
Subaru
select
monitor
:

(1)
Connect
connectors
to
TCM
and
ECM
.

(2)
Turn
ignition
switch
to
OFF
.

(3)
Connect
the
Subaru
select
monitor
to
data
link

connector
.

(4)
Turn
ignition
switch
to
ON
and
Subaru
select

monitor
switch
to
ON
.

(5)
Start
andwarm-up
the
engine
.

(6)
Read
data
onSubaru
select
monitor
.

(7)
Designate
mode
using
function
key
.

Function
mode
:
F15

SPECIFIED
DATA
:

0
.5
-
1
.22
V
(Engine
warm-up)

5

3-2
R7101
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

7
.
Diagnostic
Chart
with
Trouble
Code

I
:
TROUBLE
CODE
23

-
ENGINE
SPEED
SIGNAL
-

DIAGNOSIS
:

Engine
speed
input
signal
circuit
is
open
or
shorted
.

TROUBLE
SYMPTOM
:

"
No
lock-up
(after
engine
warm-up)

"
AT
OIL
TEMP
indicator
remains
on
when
vehicle
speed

is

0

.

1
.
Check
harness
and
connector
between
TCM
Not
OK

and
ECM
.

Repair
or
replace
harnessconnectors
.

OK

2
.
Check
inputsignal
for
TCM
.
OK

Not
OK

"
Repair
TCM
connector
terminal
poor
contact
.

"
Replace
TCM
.

Conduct
diagnostics
for
ECM's
ignition
system
.

B54884

ECM
TC
M

U
B54
B84

9
10
11
12
13141516

1
1
1
2
1
3
1
4
1
5
1
6
3132
3334
35
3637383940
4142
4344
1
58
1
59
1
60
1
61
1
6263
1
7
8
9
1011
12889
84
85
8687
88
8990
9192
9394
95
96

B2M0585

6

AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL
[T7i21
3-2

7
.
Diagnostic
Chart
with
Trouble
Code

OBD0410A
I

Data
link
connector
(for
Subaru
select
monitor
and
OBD-II
general
scan
tool)

/'
/
/
i
~1
i
Data
link
connector
(for
Subaru
select
monitor

\
only)

lqo~
,
/"~///

OBD0145A
I

EREV
(F06)

1,500
rpm

G3M0727

1
.
CHECK
HARNESS
AND
CONNECTOR
BETWEEN

TCMAND
ECM
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connectors
from
TCM
and
ECM
.

3)
Measure
resistance
of
harness
connector
between

TCM
and
ECM
.

Connector
&
terminal
l
Specified
resistance
:

(854)
No
.
5
-
(B84)
No
.
64
I1
S2,
or
less

4)
Measure
resistance
of
harness
connector
between

TCM
and
body
to
make
sure
that
circuit
does
not
short
.

Connector
&
terminal
l
Specifiedresistance
:

(B54)
No
.
5
-
Body
I
1
MSS,or
more

2
.
CHECK
INPUT
SIGNAL
FOR
TCM
.

1)
Connect
connectors
to
ECM
and
TCM
.

2)
Turn
ignition
switch
ON
(with
engine
OFF)

3)
Measure
signal
voltage
for
TCM
.

Connector
&
terminal
l
Specified
voltage
:

(854)
No
.
5
-
Body
I
70
.5
V,
or
more

9
Using
Subaru
select
monitor
:

(1)
Connect
connectors
to
ECM
and
TCM
.

(2)
Turn
ignition
switch
to
OFF
.

(3)
Connect
the
Subaru
select
monitor
to
data
link

connector
.

(4)
Turn
ignition
switch
to
ON
and
Subaru
select

monitor
switch
to
ON
.

(5)
Start
and
warm-up
the
engine
.

(6)
Operate
at
constant
engine
speed
.

(7)
Read
data
onSubaru
select
monitor
.

(8)
Designate
mode
using
function
key
.

Function
mode
:
F06

SPECIFIED
DATA
:

Same
astachometer
reading
(in
combination
meter)

7

3-2[T7L0]
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

7
.
Diagnostic
Chart
with
Trouble
Code

1
.
Check
harness
connector
between
TCM
and

throttle
position
sensor
.

OK

2
.
Check
throttle
position
sensor
.

OK

1
3
.
Check
input
signal
for
TCM
.

Not
OK

4
.
Check
power
supply
tothrottle
position

sensor
.

OK

9
Repair
TCM
connector
terminal
poor
contact
.

e
Replace
TCM
.

Not
OK
j
Repair
or
replace
harnessconnectors
.

Not
OK
Replace
throttle
position
sensor
.

OK
~
9
Repair
TCM
connector
terminal
poor
contact
.

-~j9
Replace
TCM
.

Not
OK
,1
Repair
or
replace
harnessconnectors
.

E13

884
B84

112
34
U
56
U
78
U
171819
20
212223
24252627
28
2930
454647
48
49
50515253
1
54
1
55
1
5657
7172
73
74
757677787980
8182
83

L
:
TROUBLE
CODE
31

-
THROTTLE
POSITION
SENSOR
-

DIAGNOSIS
:

Input
signal
circuit
ofthrottle
position
sensor
is
open
or

shorted
.

TROUBLE
SYMPTOM
:

Shift
point
too
high
or
too
low
;
engine
brake
not
effected

in
"3"
range
;
excessive
shift
shock
;
excessive
tight
corner

"braking"

~~B56a~B54
821
E13

1234
12345678910
123456
1314151617181920
789101112
5678
9101112
1
23
1112

B2M0613

10

AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL
[T7L3]
3-2

7
.
Diagnostic
Chart
with
Trouble
Code

t
23
E13

D

OBD0510A
I

B54

6
54
32
1
2
1
09
87

D

-V+

OBD0503A

Data
link
connector
(for
Subaru
select
monitor
and
OBD-II
general
scan
tool)

/
,
/
i
~
i
)
Data
link
connector
(for
Subaru
select
monitor

\
.only)

OBD0145AI

1
.
CHECK
HARNESS
CONNECTOR
BETWEEN
TCM

AND
THROTTLE
POSITION
SENSOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
TCM
and
throttle
position

sensor
.

3)
Measure
resistance
of
harness
connector
between

TCM
and
throttle
position
sensor
.

Connector
&
terminal
l
Specifiedresistance
:

(B54)
No
.
8
-
(E13)
No
.
2
l1
S2,
or
less

(B56)
No
.
19
-
(E13)
No
.
3
l
1
0,or
less

4)
Measure
resistance
of
harness
connector
between

TCM
and
body
to
make
sure
that
circuit
does
not
short
.

Connector
&
terminal
I
Specifiedresistance
:

(B54)
No
.
8
-
Body
l1
11492,
or
more

(B56)
No
.
19
-
Body
l1
MS2,
or
more

2
.
CHECK
THROTTLE
POSITION
SENSOR
.

Measure
resistance
between
throttle
position
sensor
ter-

minals
.

Terminals
/
Specified
resistance
:

(E13)
No
.
1
-
No
.
2
/
0
.3
-
0
.7
kS2

(Throttle
fully
closed
.)

3
-
6
kS2

(Throttle
fully
open
.)

(E13)
No
.
1
-
No
.
3
/
3
.5
-
6
.5
kS2

3
.
CHECK
INPUT
SIGNAL
FOR
TCM
.

1)
Connect
connectors
to
TCM
and
throttle
position
sen-

sor
.

2)
Turn
ignition
switch
ON
(with
engine
OFF)
.

3)
Measure
signal
voltage
input
emitted
from
throttle
posi-

tion
sensor
with
accelerator
pedal
fully
depressed
.

Connector
&
terminal
l
Specifiedvoltage
:

(B54)
No
.
8
-
No
.
7
/

0
.5
f
0
.2
V
(Throttle
fully
closed
.)

4
.6
f
0
.3
V
(Throttle
fully
open
.)

e
Using
Subaru
select
monitor
:

(1)
Connect
connectors
to
TCM
and
throttle
position

sensor
.

(2)
Turn
ignition
switch
to
OFF
.

(3)
Connect
the
Subaru
select
monitor
to
data
link

connector
.

(4)
Turn
ignition
switch
to
ON
andSubaru
select

monitor
switch
to
ON
.

11

AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL
[T810]
3-2
8
.
Diagnostic
Chart
with
Select
Monitor

THV
(F09)

4
.6V

B3M0383

Probable
cause
(if
outside"specifieddata")

1
1
.
Throttleposition
sensor

I:
MODE
F09

-
THROTTLE
POSITION
SENSOR
(THV)
-

CONDITION
:

"
Ignition
switch
ON
(with
engine
OFF)

"
Measure
voltage
while
operating
throttle
valve
from
a

fully
closed
position
to
a
fully
open
position
.

SPECIFIED
DATA
;

"
Fully
closed
position
:
0
.5±0
.2
V
"
Fully
open
position
:
4
.6±0
.3
V

"
From
fully
closed
to
fully
open
position
:

Voltage
mustsmoothlydecrease
.

"
Open
harness
:
5
.0±0
.3
V
"
Shorted
harness
:
0
.00
V

Check
performance
characteristics
ofthrottle
position
sensor
.
<
Ref
.
to
3-2
[T7L0]
.*2
>

OK

I
Check
TCM
and
replace
if
necessary
.

15

3-2
[rBKO1
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

8
.
Diagnostic
Chart
with
Select
Monitor

PLDTY
(F1
1)

50%

G3M0731

Probable
cause
(if
outside"specified
data")

1
.
Throttleposition
sensor

1
2
.
Vehicle
speed
sensor
1

1
3
.
Vehicle
speed
sensor
2

1
4
.
Engine
speed

1
5
.
ATF
temperature
sensor

6
.
Inhibitor
switch

K
:
MODE
F11

-
LINE
PRESSURE
DUTY
(PLDTY)
-

CONDITION
:

"
After
sufficient
warm-up

"
Ignition
ON
(engine
OFF)

"
N
range

SPECIFIED
DATA
:

"
Throttle
fully
closed
:
100%

"
Throttle
fully
open
:
15%
or
less

Check
in
F09
mode
.
<
Ref
.
to
3-2
[T810]
.*2>

OK

Check
in
F02
mode
.
<
Ref
.
to
3-2[TSEO].*i
>
OK

I
Check
in
F04
mode
.
<
Ref
.
to
3-2
[T8FO]
.*1
>
f
OK

Check
in
F06
mode
.
<
Ref
.
to
3-2
[T8G0]
.*i
>

OK

Check
in
F07
mode
.
<
Ref
.
to
3-2[T8H0]
.*i
>
OK

Check
for
operation
.

OK

I
Check
TCM
and
replace
if
necessary
.

16

3-2
[Two]
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

8
.
Diagnostic
Chart
withSelect
Monitor

4WDTY
(F13)

95%

G3M0733

Probable
cause
(if
outside
"specified
data")

1
.
Throttle
position
sensor

1
2
.
Vehicle
speed
sensor
1

1
3
.
Vehicle
speed
sensor
2

1
4
.
ATF
temperature
sensor

5
.
Inhibitor
switch

M
:
MODE
F13
-
AWD
DUTY
(4WDTY)
-

CONDITION
:

"
After
sufficient
warm-up

"
Ignition
switch
ON
(engine
OFF)

FWD
mode

"
AWD
mode,
D
range,
full
throttle

SPECIFIED
DATA
:

*
95%
(FWD
mode)

*
25%,
max
.
(vehicle
speed
0
m/h)
(AWD
mode)

Check
in
F09
mode
.
<
Ref
.
to
3-2
[T810]
.*2>

OK

Check
in
F02
mode
.
<
Ref
.
to
3-2
[TSEO].*1
>
OK

Check
in
F04
mode
.
<
Ref
.
to
3-2
(T8F0]
.*1
>

OK

Check
in
F07
mode
.
<
Ref
.
to
3-2
[T8H0]
.*i
>

OK

Check
for
operation
.

OK

1
6
.
ABS
signal
Check
ABS
system
for
operation
.

OK

I
Check
TCM
and
replace
if
necessary
.

18

AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL
[Taoo]
3-2

8
.
Diagnostic
Chart
withSelect
Monitor

THVCC
(F14)

5
.2
V

83M0259

Probable
cause
(Item
outside
"specified
data")

1
1
.
Throttleposition
sensor
power
supply

N
:
MODE
F14

-
THROTTLE
POSITION
SENSOR
POWER

SUPPLY
(THVCC)
-

CONDITION
:

Ignition
switch
ON
(engine
OFF)

SPECIFIED
DATA
:

5
.12f0
.1
V
Check
throttle
sensor
line
.
<
Ref
.
to
3-2

[T7L0]
.*2
>
OK

AFM
(F15)

0
.6V

83M0370

Probable
cause
(if
outside
"specified
data")

1
.
Mass
air
flow
signal
Check
performance
characteristics
of
mass
air

flow
signal
.
.
to
3-2
[T7H0]
.*2>

OK

Check
TCM
and
replace
if
necessary
.

O
:
MODE
F15

-
MASS
AIR
FLOW
SIGNAL
(AFM)
-

CONDITION
:

"
Ignition
switch
ON
(engine
ON)

"N
range

Idling

SPECIFIED
DATA
:

Engine
warm-up
:
0
.5
-
1
.22
V

I
Check
TCM
and
replace
if
necessary
.

19

2-7
[reioi
ON-BOARD
DIAGNOSTICS
II
SYSTEM

8
.
Diagnostics
for
Engine
Starting
Failure

8
.
Diagnostics
for
Engine
Starting

Failure

I:
FUEL
PUMP
CIRCUIT
(2200
cc
AWD
EXCEPT
TAIWANMODEL)

811
Check
operating
sound
offuel
pump
.

812
Checkground
circuit
offuel
pump
.

I

__
813
Check
power
supply
to
fuel
pump
.
1

814
Check
harness
between
fuel
pump
and

fuel
pump
relay
connector
.

815
[
Check
fuel
pump
relay
.

816
Check
harness
between
ECM
and
fuel

pump
relay
connector
.

CAUTION
:

After
repair
or
replacement
of
faulty
parts,
conduct

CLEAR
MEMORY
and
INSPECTION
MODES
.

Ref
.
to
2-7
[T3D0]
and
[T3E0]
.*2
and
*4
>

4