automatic transmission SUBARU LEGACY 1996 Service Repair Manual

ON-BOARD
DIAGNOSTICS
11
SYSTEM
[T11aoj
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

DTC

No
.

Abbreviation

(Subaru
select
monitor)
Item
Page

P0705
ATRNG
Transmissionrange
sensor
circuit
malfunction
108

P0710
ATF
Transmission
fluid
temperature
sensor
circuit
malfunction
109

P0720
ATVSP
Output
speed
sensor
(vehicle
speed
sensor
1)
circuit
malfunction
110

P0725
ATNE
Engine
speed
input
circuit
malfunction
111

P0731
ATGR1
Gear
1
incorrect
ratio

P0732
ATGR2
Gear
2
incorrect
ratio
1
2
P0733
ATGR3
Gear
3
incorrect
ratio
1

P0734
ATGR4
Gear
4
incorrect
ratio

P0740
ATLU
-
F
Torque
converter
clutch
system
malfunction
114

P0743
ATLU
Torque
converter
clutch
system
(duty
solenoid
B)
electrical
115

P0748
ATPL
Pressure
control
solenoid
(duty
solenoid
A)
electrical
116

P0753
ATSFTi
Shift
solenoid
A
(shift
solenoid
1)
electrical
117

P0758
ATSFT2
Shift
solenoid
B
(shift
solenoid
2)
electrical
118

P0760
ATOVR
-
F
Shift
solenoid
C
(shift
solenoid
3)
malfunction
119

P0763
ATOVR
Shift
solenoid
C
(shift
solenoid
3)
electrical
120

P1100
ST
-
SW
Starter
switch
circuit
malfunction
121

P1101
N/P
-
SW
Neutral
position
switch
circuit
malfunction
122

P1102
BR
Pressure
sources
switching
solenoid
valve
circuit
malfunction
123

P1103
TRQ
Engine
torque
control
signal
circuit
malfunction
124

P1500
FAN
-
1
Radiator
fan
relay
1
circuit
malfunction
125

P1502
FAN
-
F
Radiator
fan
function
problem
126

P1700
ATTH
Throttle
position
sensor
circuit
malfunction
127

P1701
ATCRS
Cruise
control
set
signal
circuit
malfunction
128

P1702
ATDIAG
Automatic
transmission
diagnosis
inputsignal
circuit
malfunction
I
129
75

2-7
[T11AV0]
ON-BOARD
DIAGNOSTICS
11
SYSTEM

11
.
Diagnostics
Chart
with
Trouble
Code

AV
:
DTC
P0740

-
TORQUE
CONVERTER
CLUTCH
SYSTEM

MALFUNCTION
(ATLU
-
F)
-

WIRING
DIAGRAM
:

Automatic
transmission

Duty
ATF
Vehicle
solenoid
temperature
speed
B
sensor
sensorl

854
Brake
Throttle

b~
B55
1
Ii
t
positions

856
B11
T4

B53

TCM

Inhibitor
switch
N
00
0

a

t
~
3
1

B12
T3

Combination
meter
Speedometer
ECM
circuit

B84

e
:
B54
b
:
855
c
:
B56BI1B53812
O

123456
123456712345678910
81

1
234
5
67
8
9101112
1234
5678

910
11
12
13141516
3132
33
3435
363738394
0
4142
4344
6970
58596061626364L
111
9
1
10
1
11
1
12
1
13
1
14
1
15
11
6
789
101112
1
11
1
12
1
13
1
14
1
15
1
16
1
171819
20
1314
I
I6
1
2349
10
1112
8485
86
87888990
91
E3
1
0
-
4
1
95
96
12

B2M0587

NOTE
:

For
the
diagnostic
procedure
on
torque
converter
clutch

system
malfunction
(DTC
P0740),
referto
2-7
[T10AV0]*2
.

114

ON-BOARD
DIAGNOSTICS
II
SYSTEM
[T11BA0]
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

BA
:
DTC
P0760

-
SHIFT
SOLENOID
C
(SHIFT
SOLENOID
3)

MALFUNCTION
(ATOVR
-
F)
-

WIRING
DIAGRAM
:

BIIT4
Automatic
transmission

4
S
JTM
Shift
solenoid
1

Shift
solenoid
2

Shift
solenoid
3

TCM

Inhibitor
B12
T3
-switch
PRND321
4
000000C
--------------

b
;

c
:

b
:
C
;

"I
L
34
Liel-ml
I
nn
78
15
,11
F21[3
1
4
1
5
1
r6j[7
8
9
01112
416178
9
1
R
L911[111111~13114115116
2346
711+81V90
1314
6
1
00
1112
013D0613,1

NOTE
:

For
the
diagnostic
procedure
on
shift
solenoid
C
malfunc-

tion
(DTC
P0760),
refer
to
2-7
[T10BA0]*2
.

119

ON-BOARD
DIAGNOSTICS
II
SYSTEM
trylaKOi
2-7

11
.
Diagnostics
Chart
with
Trouble
Code

BK
:
DTC
P1702

-
AUTOMATIC
TRANSMISSION
DIAGNOSIS

INPUT
SIGNAL
CIRCUIT
MALFUNCTION

(ATDIAG)
-

WIRING
DIAGRAM
:

B84B55

>>
TCMECM

884B55

1
2
34
U
56
U
78
U
0
171112
1
2Q
212223
1
2425262
7
28293
45
4647
7
1
T
849
505152
!
N9
1
1
55
5657
1
2
3
4
5
6
78
7172
74757677
81
2
83
9
10111213141516

B2M0614

NOTE
:

For
the
diagnostic
procedure
on
automatic
transmission

diagnosis
input
signal
circuit
malfunction
(DTC
P1702),

referto
2-7
[T10BM0]*2
.

129

3-2
[TSAO1
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

6
.
Diagnostic
Chart
for
On-board
Diagnostics
System

6
.
Diagnostic
Chart
for
On-board

Diagnostics
System

A
:
BASICDIAGNOSTIC
PROCEDURE

TROUBLE
OCCURS
.

INTERVIEW

1
.
Oil
level
check
<
Ref
.
to
3-2

[W2A1],
[W2A2]
.*1
>

2
.
Oil
leak
check
<
Ref
.
to
3-2

[W2A3]
.x`r1
>

3
.
Brake
band
adjustment
<
Ref
.

to
3-2
[W2B1]
.t`r1
>

4
.
Stall
test
<
Ref
.
to
3-2

[W3A0]
.*1
>

5
.
Line
pressure
test
<
Ref
.
to
3-2
[W3C0]
.*1
>

6
.
Transfer
clutch
pressure
test
<
Ref
.
to
3-2
[W3D0]
.*1
>

7
.
Time
lag
test
<
Ref
.
to
3-2

[W3B0]
.*1
>

8
.
Road
test

<
Ref
.
to
3-2
[W3E0]
.*1
>

BASIC
CHECKS

TROUBLE
INDICATION
(AT
OIL
TEMP
INDICATOR)

Not
indicated
.

Indicated
.

ON-BOARD

DIAGNOSTICS

Inspection
using
General

Diagnostic
Table
[T900]*I
.

I

Inspection
using
Diagnostic

Chart
with
Select
Monitor

[T800]*1,
*2
.

Not
OK

No
trouble
code

Trouble
code

Repair
.

CLEAR
MEMORY

Confirmation
test
Trouble
code
(ON-BOARD
DIAGNOSTICS)

No
trouble
code

End

Check
in

accordance

trouble
code

[T700]*1,
*2
.

2

AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL
[T6D1]
3-2

6
.
Diagnostic
Chart
for
On-board
Diagnostics
System

D
:
LIST
OF
TROUBLE
CODE

1
.
TROUBLE
CODE

Trouble
code
Item
Content
of
diagnosis
Abbr
.

(Select
monitor)
Page

11
Duty
solenoid
A
Detects
open
or
shorted
drive
pLDTY
-
circuit,
as
well
asvalve
seizure
.

12
Duty
solenoid
B
Detects
open
or
shorted
drive
LUDTY
-
circuit,
as
well
asvalve
seizure
.

13
Shift
solenoid
3
Detects
open
or
shorted
drive
OVR
-
circuit,
as
well
as
valve
seizure
.

14
Shift
solenoid
2
Detects
open
or
shorted
drive
SFT2
-
circuit,
as
well
as
valve
seizure
.

15
Shift
solenoid
1
Detects
open
or
shorted
drive
SFTi
-
circuit,
as
well
as
valve
seizure
.

21
ATF
temperature
sensor
Detects
open
or
shorted
input
ATFT
-
signal
circuit
.

22
Mass
air
flowsignalDetects
open
or
shorted
input
AFM
4
signal
circuit
.

23
Engine
speed
signal
Detects
open
or
shorted
input
EREV
6
signal
circuit
.

24
Duty
solenoid
C
Detects
open
or
shorted
drive
4WDTY
-
circuit,
as
well
as
valve
seizure
.

25
Torque
control
signal
Detects
open
or
shorted
input
TQ
.CT8
signal
circuit
.

31
Throttle
position
sensor
Detects
open
or
shorted
input
THV
10
signal
circuit
.

32
Vehicle
speed
sensor
1
Detects
open
or
shorted
input
VSP1
-
signal
circuit
.

33
Vehicle
speed
sensor
2Detects
open
or
shorted
input
VSP2
-
signal
circuit
.

3-2
[vi-1101
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

7
.
DiagnosticChart
with
Trou
ble
Code

7
.
Diagnostic
Chart
with
Trouble
Code

H
:
TROUBLE
CODE
22

-
MASS
AIR
FLOW
SIGNAL
-

DIAGNOSIS
:

Input
signal
circuit
of
TCM
from
ECM
is
open
or
shorted
.

1
.
Check
trouble
code
onengine
side
.
Not
OK
<
Ref
.
to
2-7
On-Board
Diagnostics
II
System

[T10B0]
.*2
>

OK

2
.
Check
harness
connector
between
TCM
and
Not
OK
ECM
.

OK

3
.
Check
input
signal
for
TCM
.
Not
OK
OK

Clear
memory
->
Confirmation
test-+
Not
OK
->

Repair
TCM
connector
terminal
poor
contact
.
~
Check
for
cause
of
trouble
in
engine
.

Repair
TCM
connector
terminal
poor
contact
.
~
*
Replace
TCM
.

854

TCM

B54
O

9
10
Ill
12
1314
U
15163132
3343536373839
OG14243G4
123456
V
1
59
~
0
~
1
1
6
4
63
~
46$6
~
7
1
6
6970
J
11
7
1
8
1
9
1
10
1
11
1
12
1
4
5687
99091923949596

B3M0475
I

1
.
CHECK
TROUBLE
CODE
ON
ENGINE
SIDE
.

Using
Subaru
select
monitor
or
OBD-general
scan
tool,

check
trouble
code
of
mass
air
flow
sensor
on
engine
side
.

4

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