Subaru Legacy (2005 year). Service manual — part 549

4AT(diag)-33

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

13.Diagnostic Procedure with Diagnostic Trouble Code (DTC)

A: DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT (PRNDL INPUT)

DTC DETECTING CONDITION:
• Inhibitor switch is faulty.
• More than 2 range signal is input.
TROUBLE SYMPTOM:
• Shift characteristics are erroneous.
• Range position of select lever and AT select lever position indicator light on the combination meter is not
matched.

4AT(diag)-34

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

WIRING DIAGRAM:
• LHD model

AT-03155

i10

i77

i84

B280

B54

B12

T7

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

10

9

8

7

6

5

4

3

2

1

12

11

10

9

12

11

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

30

18

29

28

27

26

25

24

8

3

4

5

6

7

2

1

18 19 20

17

16

15

14

13

12

11

10

9

24

23

22

21

A:

B:

3

4

21

22

P

R

N

D

i10

i77

i84

A:

B280

B:

A27

A26

B20

B30

3

12

14

4

5

22

2

8

3

1

T7

B54

B12

T3

T3

B12

8

3

9

10

5

4

P

R

N

D

MAIN SBF

SBF-6

No.5

E

E

B

A

TTER

Y

COMBINATION
METER

JOINT
CONNECTOR

BODY INTEGRATED
MODULE

TCM

INHIBITOR
SWITCH

7

1

2

4

5

7

B352

JOINT
CONNECTOR

B355

JOINT
CONNECTOR

B352

B355

1 2 3 4
5 6 7 8

2

*

2

*

1

*

1

*

8

2

1

*

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

2

*

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

4AT(diag)-35

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

• RHD model

AT-03156

3

4

21

22

7

P

R

N

D

i10

i77

i10

i77

i84

B280

B352

B53

B54

B12

T7

i84

A:

B280

B:

2

8

A27

A26

B20

B30

3

12

14

4

5

22

2

8

3

1

8

B352

2

4

B53

T7

B54

B12

T3

T3

B12

8

3

9

10

5

4

P

R

N

D

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

2

1

3 4

8

7

6

5

12

11

10

9

8

7

6

5

4

3

2

1

10

9

8

7

6

5

4

3

2

1

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

12

11

10

9

12

11

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

30

18

29

28

27

26

25

24

8

3

4

5

6

7

2

1

18 19 20

17

16

15

14

13

12

11

10

9

24

23

22

21

MAIN SBF

SBF-6

No.5

E

E

B

A

TTER

Y

COMBINATION
METER

JOINT
CONNECTOR

BODY INTEGRATED
MODULE

JOINT
CONNECTOR

JOINT
CONNECTOR

TCM

INHIBITOR
SWITCH

A:

B:

2

*

2

*

1

*

1

*

6

1

1

*

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

2

*

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

4AT(diag)-36

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK INDICATOR LIGHT.
1) Turn the ignition switch to ON.
2) Shift the select lever to “P” range.

Does the “P” range indicator
light on combination meter illu-
minate?

Go to step 2.

Go to step 12.

2

CHECK INDICATOR LIGHT.

Does the “R” range indicator
light on combination meter illu-
minate?

Go to step 26.

Go to step 3.

3

CHECK INDICATOR LIGHT.

Does the “N” range indicator
light on combination meter illu-
minate?

Go to step 33.

Go to step 4.

4

CHECK INDICATOR LIGHT.

Does the “D” range indicator
light on combination meter illu-
minate?

Go to step 40.

Go to step 5.

5

CHECK “P” RANGE SWITCH.
1) Connect the Subaru Select Monitor to data
link connector.
2) Shift the select lever to “R” range.

Does the “P” range LED of
Subaru Select Monitor illumi-
nate?

Go to step 19.

Go to step 6.

6

CHECK INDICATOR LIGHT.

Does the “R” range indicator
light on combination meter illu-
minate?

Go to step 8.

Go to step 7.

7

CHECK “R” RANGE SWITCH.

Does the “R” range LED of
Subaru Select Monitor illumi-
nate?

Go to step 23.

Go to step 20.

8

CHECK INDICATOR LIGHT.
Shift the select lever to “N” range.

Does the “P” range indicator
light on combination meter illu-
minate?

Go to step 10.

Go to step 9.

9

CHECK “N” RANGE SWITCH.

Does the “N” range LED of
Subaru Select Monitor illumi-
nate?

Go to step 30.

Go to step 27.

10

CHECK INDICATOR LIGHT.
Shift the select lever to “D” range.

Does the “D” range indicator
light on combination meter illu-
minate?

Even if the SPORT
indicator light is
blinking, the cir-
cuit has returned
to normal condi-
tion at this time. A
temporary poor
contact of connec-
tor or harness may
be the cause.
Repair the har-
ness or connector
in TCM and trans-
mission.

Go to step 11.

11

CHECK “D” RANGE SWITCH.

Does the “D” range LED of
Subaru Select Monitor illumi-
nate?

Go to step 37.

Go to step 34.

12

CHECK HARNESS CONNECTOR BETWEEN
INHIBITOR SWITCH AND CHASSIS
GROUND.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from inhibitor
switch.
3) Measure the resistance of harness
between inhibitor switch and chassis ground.

Connector & terminal

(T7) No. 5 — Chassis ground:

Is the resistance less than 1
Ω?

Go to step 13.

Repair the open
circuit of harness
between inhibitor
switch connector
and chassis
ground, and poor
contact in cou-
pling connector.