Subaru Legacy (2005 year). Manual - part 547

4AT(diag)-25

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

SPORT Indicator Light Display

Step

Check

Yes

No

1

CHECK SPORT INDICATOR LIGHT.
Turn the ignition switch to ON.

Does the SPORT indicator 
light illuminate?

Go to step 2.

Perform the self-
diagnosis of com-
bination meter.

2

CHECK SPORT INDICATOR LIGHT.
After the ignition switch is ON, wait for at least 
2 seconds.

Does the SPORT indicator 
light illuminate?

Go to step 3.

Go to step 4.

3

CHECK SPORT INDICATOR LIGHT.
Start the engine.

Does the SPORT indicator 
light go off?

Normal. Go back 
to “Basic Diagnos-
tic Procedure”. 
<Ref. to 4AT(diag)-
2, Basic Diagnos-
tic Procedure.>

Go to step 7.

4

CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
Connect the Subaru Select Monitor to data link 
connector.

Is the communication between 
Subaru Select Monitor and 
TCM normal?

Go to step 5.

Check the power 
supply ground cir-
cuit of TCM and 
Subaru Select 
Monitor communi-
cation. <Ref. to 
4AT(diag)-26, 
Diagnostic Proce-
dure for Subaru 
Select Monitor 
Communication.>

5

CHECK TCM.
Display the current data of TCM using Subaru 
Select Monitor.

Is the “Diagnosis Lamp” out-
put signal “ON”?

Go to step 6.

Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).>

6

CHECK BODY INTEGRATED MODULE.
Display the current data of body integrated 
module using Subaru Select Monitor. <Ref. to 
LAN(diag)-14, OPERATION, Subaru Select 
Monitor.>

Is the “SPORT Lamp” input 
signal “Illuminate”?

Replace the com-
bination meter 
assembly. <Ref. to 
IDI-15, Combina-
tion Meter.>

Check DTC of 
body integrated 
module. <Ref. to 
LAN(diag)-14, 
OPERATION, 
Subaru Select 
Monitor.>

7

CHECK TCM.
Display the current data of TCM using Subaru 
Select Monitor. <Ref. to 4AT(diag)-16, OPERA-
TION, Subaru Select Monitor.>

Is the “Diagnosis Lamp” out-
put signal “ON”?

Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).>

Go to step 8.

8

CHECK BODY INTEGRATED MODULE.
Display the current data of body integrated 
module using Subaru Select Monitor. <Ref. to 
LAN(diag)-14, OPERATION, Subaru Select 
Monitor.>

Is the “SPORT Lamp” input 
signal “Illuminate”?

Check DTC of 
body integrated 
module. Perform 
the diagnosis 
according to DTC. 
<Ref. to 
LAN(diag)-14, 
OPERATION, 
Subaru Select 
Monitor.>

Perform the self-
diagnosis for com-
bination meter. 
<Ref. to IDI-3, 
INSPECTION, 
Combination 
Meter System.>

4AT(diag)-26

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure for Subaru Select Monitor Communication

11.Diagnostic Procedure for Subaru Select Monitor Communication

A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DIAGNOSIS:
Defective harness connector
TROUBLE SYMPTOM:
Subaru Select Monitor communication failure
WIRING DIAGRAM:
• LHD model

AT-03153

B40

B54

B55

B54

A:

B55

B:

B11

T4

TCM

B53

B40

E

F/B No.12

M/B No.12

SBF-6

MAIN SBF

B27

A8

A17

B31

B21

B12

B2

B3

1 2

3 4 5 6

7 8

9 10 11 12 13 14 15 16

1

12

10

13

E

E

B11

1

2

3 4

5

6 7

8

9

13

14 15

20

19

17

16

10

11 12

18

1 2

7

8 9

5

6

3

4

10 11 12

19 20 21

13 14 15 16

17 18

22 23 24

1

2

7

8

9

5

6

3

4

10 11 12

19 20 21

29 30 31

13 14 15 16 17

27 28

18

22 23 24 25 26

19

20

A:

B:

No.13

B29

B28

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

B53

2

1

3 4

8

7

6

5

B122

B122

BATTERY

IGNITION
SWITCH

JOINT
CONNECTOR

TRANSMISSION

DATA LINK
CONNECTOR

JOINT
CONNECTOR

B21

1 2 3 4

12 13 14 15

5 6 7 8

16 17 18 19

9 10 11

20 21 22

23 24 25 26 27 28 29 30 31 32 33

35

34

37

36

39

38

41

40

43

42

44

45

47

46

49

48

51

50

53

52

54

36

B21

E2

E

B53

JOINT
CONNECTOR

: TERMINAL No. RANDOM ARRANGEMENT

1

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 4,5,14, AND 15

2

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 2,3, AND 13

1

*

2

*

1

*

1

*

2

*

2

*

1

*

3

*

3

*

3

*

4

*

4

*

4

*

5

*

5

*

5

*

3

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 6,7,16, AND 17

4

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 8,18, AND 19

4AT(diag)-27

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure for Subaru Select Monitor Communication

• RHD model

B54

A:

B55

B:

B11

T4

TCM

B40

E

F/B No.12

M/B No.12

SBF-6

MAIN SBF

B27

A8

A17

B31

B21

B12

B2

B3

1

12

10

13

E

E

19

20

No.13

B29

B28

B53

25E

O25

:

:

B138

B83

BATTERY

IGNITION
SWITCH

JOINT
CONNECTOR

TRANSMISSION

DATA LINK
CONNECTOR

JOINT
CONNECTOR

B40

B54

B55

B21

B53

1 2

3 4 5 6

7 8

9 10 11 12 13 14 15 16

1 2 3 4
5 6 7 8

9 10 11 12

13 14 15 16

B11

1

2

3 4

5

6 7

8

9

13

14 15

20

19

17

16

10

11 12

18

1 2

7

8 9

5

6

3

4

10 11 12

19 20 21

13 14 15 16

17 18

22 23 24

1

2

7

8

9

5

6

3

4

10 11 12

19 20 21

29 30 31

13 14 15 16 17

27 28

18

22 23 24 25 26

A:

B:

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

B83

2

1

3 4

8

7

6

5

B138

O25 : EXCEPT 2.5 L EK MODEL

25E : 2.5 L EK MODEL

AT-03154

36

E

B21

E2

B21

1 2 3 4

12 13 14 15

5 6 7 8

16 17 18 19

9 10 11

20 21 22

23 24 25 26 27 28 29 30 31 32 33

35

34

37

36

39

38

41

40

43

42

44

45

47

46

49

48

51

50

53

52

54

*

: TERMINAL No. RANDOM ARRANGEMENT

2

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 6,7,16, AND 17

2

*

1

*

2

*

2

*

1

*

3

*

3

*

3

*

3

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 4,5,14, AND 15

1

4AT(diag)-28

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure for Subaru Select Monitor Communication

Step

Check

Yes

No

1

CHECK INSTALLATION OF TCM CONNEC-
TOR.
Turn the ignition switch to OFF.

Is TCM connector connected 
to TCM?

Go to step 2.

Connect the TCM 
connector to TCM.

2

CHECK SUBARU SELECT MONITOR POW-
ER SUPPLY CIRCUIT.
Measure the voltage between data link con-
nector and chassis ground.

Connector & terminal

(B40) No. 1 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 3.

Repair the har-
ness connector 
and connector 
between battery 
and data link con-
nector, and poor 
contact in connec-
tor.

3

CHECK SUBARU SELECT MONITOR 
GROUND CIRCUIT.
Measure the resistance of harness between 
data link connector and chassis ground.

Connector & terminal

(B40) No. 12 — Chassis ground:

Is the resistance less than 1 
Ω?

Go to step 4.

Repair the open 
circuit of harness 
between data link 
connector and 
ground terminal.

4

CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check 
whether communication to transmission sys-
tems can be executed normally.

Are the name of system dis-
played on Subaru Select Moni-
tor?

Go to step 9.

Go to step 5.

5

CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Disconnect the TCM connector.
3) Check whether communication to engine 
systems can be executed normally.

Are the name of system dis-
played on Subaru Select Moni-
tor?

Go to step 7.

Go to step 6.

6

CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Connect the TCM connector.
3) Disconnect the ECM connector.
4) Check whether communication to transmis-
sion systems can be executed normally.

Are the name of system dis-
played on Subaru Select Moni-
tor?

Inspect the ECM.

Go to step 7.

7

CHECK HARNESS CONNECTOR BETWEEN 
EACH CONTROL MODULE AND DATA LINK 
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the TCM and ECM connector.
3) Measure the resistance between TCM con-
nector and chassis ground.

Connector & terminal

(B40) No. 10 — Chassis ground:

Is the resistance more than 1 
M

Ω?

Go to step 8.

Check harness 
and connector 
between each con-
trol module and 
data link connec-
tor.

8

CHECK OUTPUT SIGNAL OF TCM.
1) Turn the ignition switch to ON.
2) Measure the voltage between TCM and 
chassis ground.

Connector & terminal

(B40) No. 10 (+) — Chassis ground (

−

):

Is the voltage more than 1 V?

Check harness 
and connector 
between each con-
trol module and 
data link connec-
tor.

Go to step 9.

9

CHECK HARNESS CONNECTOR BETWEEN 
TCM AND DATA LINK CONNECTOR.
Measure the resistance between TCM connec-
tor and data link connector.

Connector & terminal

(B55) No. 12 — (B40) No. 10:

Is the resistance less than 1 
Ω?

Go to step 10.

Repair the har-
ness and connec-
tor between TCM 
and data link con-
nector.