Subaru Legacy (2005 year). Service manual - part 570

4AT(diag)-117

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK BODY INTEGRATED MODULE.
1) Connect the Subaru Select Monitor to data 
link connector.
2) Turn the ignition switch to ON. (engine 
OFF)
3) Read the DTC of body integrated module 
using Subaru Select Monitor. <Ref. to 
LAN(diag)-14, OPERATION, Subaru Select 
Monitor.>

Is DTC displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 2.

2

CHECK BODY INTEGRATED MODULE IN-
PUT SIGNAL.
1) Shift the select lever to “P” range.
2) Read the Tiptronic Mode Switch data of 
body integrated module using Subaru Select 
Monitor. <Ref. to LAN(diag)-14, OPERATION, 
Subaru Select Monitor.>

Is OFF displayed?

Go to step 3.

Go to step 7.

3

CHECK BODY INTEGRATED MODULE IN-
PUT SIGNAL.
1) Shift the select lever from “P” to “D” range.
2) Read the Tiptronic Mode Switch data of 
body integrated module using Subaru Select 
Monitor. <Ref. to LAN(diag)-14, OPERATION, 
Subaru Select Monitor.>

Is the indication on each range 
OFF?

Go to step 4.

Replace the select 
lever assembly. 
<Ref. to CS-22, 
Select Lever.>

4

CHECK BODY INTEGRATED MODULE IN-
PUT SIGNAL.
1) Shift the select lever to manual mode side.
2) Shift the select lever to any other than “D” 
range.
3) Read the Tiptronic Mode Switch data of 
body integrated module using Subaru Select 
Monitor. <Ref. to LAN(diag)-14, OPERATION, 
Subaru Select Monitor.>

Is OFF displayed?

Go to step 5.

Replace the select 
lever assembly. 
<Ref. to CS-22, 
Select Lever.>

5

CHECK INHIBITOR SWITCH.
Shift the select lever from “P” to “D” range.

Is the indication of range posi-
tion indicator light in combina-
tion meter synchronized with 
position of select lever?

Go to step 6.

Adjust the inhibi-
tor switch and 
select cable. <Ref. 
to 4AT-51, 
ADJUSTMENT, 
Inhibitor Switch.> 
<Ref. to CS-30, 
ADJUSTMENT, 
Select Cable.>

6

CHECK TCM INPUT SIGNAL.
1) Shift the select lever from “P” to “D” range.
2) Read the Tiptronic Mode Switch data of 
TCM using Subaru Select Monitor. <Ref. to 
4AT(diag)-16, OPERATION, Subaru Select 
Monitor.>

Is the indication on each range 
OFF?

Even if the SPORT 
indicator light is 
blinking, the cir-
cuit has returned 
to normal condi-
tion at this time. A 
temporary short 
circuit of connector 
or harness may be 
the cause. Repair 
the harness or 
connector.

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

4AT(diag)-118

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

7

CHECK HARNESS BETWEEN BODY INTE-
GRATED MODULE AND SWITCH FOR 
SPORT MODE AND MANUAL MODE.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector from 
body integrated module and select lever.
3) Measure the resistance of body integrated 
module and chassis ground.

Connector & terminal

(B281) No. 26 — Chassis ground:

Is the resistance more than 1 
M

Ω?

Go to step 8.

Repair the short 
circuit of harness 
between body inte-
grated module and 
switch for SPORT 
mode and manual 
mode.

8

CHECK SWITCH FOR SPORT MODE AND 
MANUAL MODE.
1) Shift the select lever to “P” range.
2) Measure the resistance between connector 
terminals of switch for SPORT mode and man-
ual mode.

Terminal

No. 7 — No. 8:

Is the resistance more than 1 
M

Ω?

Check the body 
integrated module.

Replace the select 
lever assembly. 
<Ref. to CS-22, 
Select Lever.>

Step

Check

Yes

No

4AT(diag)-119

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

14.Diagnostic Procedure without Diagnostic Trouble Code (DTC)

A: CHECK FWD SWITCH

DIAGNOSIS:
• LED does not come on even if FWD switch is ON.
• FWD signal circuit is open or shorted.
WIRING DIAGRAM:
• LHD model

i10

i77

i84

B54

B281

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

12

11

10

9

8

7

6

5

4

3

2

1

8

7

6

5

4

3

2

1

22 23

21

20

19

16

15

14

13

12

11

10

9

34 35

33

32

17
30

18
31

29

28

27

26

25

24

8

7

6

5

4

3

2

1

22 23

21

20

19

16

15

14

13

12

11

10

9

17 18

28

27

26

25

24

F108

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

9

17 18

B361

F27

8

7

6

5

4

3

2

1

14

13

12

11

10

9

8

3

4

5

6

7

2

1

18 19 20

17

16

15

14

13

12

11

10

9

24

23

22

21

B55

3

4

1

2

5

6

7

8

9

18 19 20 21

17

16

15

14

13

12

11

10

24

23

22

26

25

28

27

31

30

29

5

4

2

1

3

16 17

14

13

6

7

15

11

9

8

10

12

31

29

28

25

26
27

22
23

21

20

24

19

18

30

A:

B:

A:

B:

AT-03164

3

4

21

1

22

7

i10

i77

2

8

A27

A26

B20

B30

A3

A12

B17

i84

A:

B281

B:

TCM

B54

A:

B55

B:

FWD

SWITCH

F27

B361

F108

19

11

18

13

E

AWD

E

IGNITION

SWITCH

B

A

TTER

Y

COMBINATION
METER

JOINT
CONNECTOR

BODY INTEGRATED MODULE

JOINT
THROUGH
CONNECTOR

A/C RELAY HOLDER

2

4

5

7

B352

JOINT
CONNECTOR

B355

JOINT
CONNECTOR

B352

B355

1 2 3 4
5 6 7 8

No.12

SBF-6

MAIN SBF

2

*

2

*

1

*

1

*

1

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 1,2,5, AND 6

2

*

: TERMINAL No. RANDOM ARRANGEMENT
  AMONG 3,4,7, AND 8

4AT(diag)-120

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

• RHD model

i10

i77

i84

B54

B281

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

12

11

10

9

8

7

6

5

4

3

2

1

8

7

6

5

4

3

2

1

22 23

21

20

19

16

15

14

13

12

11

10

9

34 35

33

32

17
30

18
31

29

28

27

26

25

24

8

7

6

5

4

3

2

1

22 23

21

20

19

16

15

14

13

12

11

10

9

17 18

28

27

26

25

24

F108

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

9

17 18

B361

F27

8

7

6

5

4

3

2

1

14

13

12

11

10

9

8

3

4

5

6

7

2

1

18 19 20

17

16

15

14

13

12

11

10

9

24

23

22

21

B55

3

4

1

2

5

6

7

8

9

18 19 20 21

17

16

15

14

13

12

11

10

24

23

22

26

25

28

27

31

30

29

5

4

2

1

3

16 17

14

13

6

7

15

11

9

8

10

12

31

29

28

25

26
27

22
23

21

20

24

19

18

30

A:

B:

A:

B:

AT-03165

3

4

21

1

22

7

i10

i77

2

8

A27

A26

B20

B30

A3

A12

B17

i84

A:

B281

B:

TCM

B54

A:

B55

B:

FWD

SWITCH

F27

B361

F108

19

11

18

13

E

AWD

E

IGNITION

SWITCH

B

A

TTER

Y

COMBINATION
METER

JOINT
CONNECTOR

BODY INTEGRATED MODULE

JOINT
THROUGH
CONNECTOR

A/C RELAY HOLDER

8

B352

2

4

B53

JOINT
CONNECTOR

JOINT
CONNECTOR

B352

B53

10

9

8

7

6

5

4

3

2

1

20

19

18

17

16

15

14

13

12

11

2

1

3 4

8

7

6

5

No.12

SBF-6

MAIN SBF

2

*

2

*

1

*

1

*

6

1

*

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

2

*

 : TERMINAL No. RANDOM ARRANGEMENT
   AMONG 9,10, AND 20