Subaru Legacy (2005 year). Manual - part 569

4AT(diag)-113

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK OUTPUT OF LATERAL G SENSOR 
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in 
Subaru Select Monitor.
2) Read the lateral G sensor output on Subaru 
Select Monitor display.

Is the value on display 2.3 — 
2.7 V when the lateral G sen-
sor is in horizontal position?

Go to step 2.

Go to step 5.

2

CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con-

nector between TCM and lat-
eral G sensor?

Repair the con-
nector.

Go to step 3.

3

CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.

Is the same DTC still dis-
played?

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

Go to step 4.

4

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

5

CHECK CONDITIONAL INFORMATION 
WHEN FAULTY.
Read the lateral G sensor output on Subaru 
Select Monitor display.

Is the reading on monitor dis-
play 4.65 V or more?

Go to step 6.

Go to step 12.

6

CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND 
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM con-
nector terminals.

Connector & terminal

(B54) No. 2 — No. 9:

Is the resistance 4.3 — 4.9 
k

Ω?

Go to step 7.

Repair the har-
ness connector 
between lateral G 
sensor and 
ABSCM&H/U.

7

CHECK BATTERY SHORT OF HARNESS.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Disconnect the connector from lateral G 
sensor.
4) Disconnect the connector from TCM.
5) Measure the voltage between TCM con-
nector and chassis ground.

Connector & terminal

(B54) No. 2 (+) — Chassis ground (

−

):

Is the voltage less than 1 V?

Go to step 8.

Repair the har-
ness between lat-
eral G sensor and 
TCM.

8

CHECK BATTERY SHORT OF HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between TCM con-
nector and chassis ground.

Connector & terminal

(B54) No. 2 (+) — Chassis ground (

−

):

Is the voltage less than 1 V?

Go to step 9.

Repair the har-
ness between lat-
eral G sensor and 
TCM.

9

CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con-

nector between TCM and lat-
eral G sensor?

Repair the con-
nector.

Go to step 10.

10

CHECK TCM.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.

Is the same DTC still dis-
played?

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

Go to step 11.

11

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

4AT(diag)-114

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

12

CHECK INPUT VOLTAGE OF LATERAL G 
SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the console box.
3) Remove the lateral G sensor from vehicle. 
(Do not disconnect connector.)
4) Turn the ignition switch to ON.
5) Measure the voltage between lateral G 
sensor connector terminals.

Connector & terminal

(B359) No. 1 (+) — No. 2 (

−

):

Is the voltage 4.75 — 5.25 V?

Go to step 13.

Repair the har-
ness connector 
between lateral G 
sensor and TCM.

13

CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS AND GROUND 
HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM con-
nector terminals.

Connector & terminal

(B54) No. 2 — No. 9:

Is the resistance 5.0 — 5.6 
k

Ω?

Go to step 14.

Repair the har-
ness connector 
between lateral G 
sensor and TCM.

14

CHECK LATERAL G SENSOR.
1) Connect the connector to lateral G sensor.
2) Connect the connector to the TCM.
3) Turn the ignition switch to ON.
4) Measure the voltage between lateral G 
sensor connector terminals.

Connector & terminal

(B359) No. 3 (+) — No. 2 (

−

):

Is the voltage 2.3 — 2.7 V 
when lateral G sensor is hori-
zontal?

Go to step 15.

Replace the lat-
eral G sensor. 
<Ref. to 4AT-67, 
Lateral G Sensor.>

15

CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor 
connector terminals.

Connector & terminal

(B359) No. 3 (+) — No. 2 (

−

):

Is the voltage 3.3 — 4.3 V 
when lateral G sensor is 
inclined to the right to 90

°?

Go to step 16.

Replace the lat-
eral G sensor. 
<Ref. to 4AT-67, 
Lateral G Sensor.>

16

CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor 
connector terminals.

Connector & terminal

(B359) No. 3 (+) — No. 2 (

−

):

Is the voltage 0.7 — 1.7 V 
when lateral G sensor is 
inclined to the left to 90

°?

Go to step 17.

Replace the lat-
eral G sensor. 
<Ref. to 4AT-67, 
Lateral G Sensor.>

17

CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.

Is there poor contact in con-
nector between TCM and lat-
eral G sensor?

Repair the con-
nector.

Go to step 18.

18

CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Perform the clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.

Is the same DTC still dis-
played?

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

Go to step 19.

19

CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

Step

Check

Yes

No

4AT(diag)-115

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AE:DTC P1817 SPORT MODE SWITCH CIRCUIT

DTC DETECTING CONDITION:
Input signal circuit of SPORT mode and manual mode switch is shorted.
TROUBLE SYMPTOM:
• Manual mode can not be set.
• The SPORT indicator light does not illuminate.
• SPORT mode can not be set.
WIRING DIAGRAM:
• LHD model

AT-03162

i84

B280

B54

B116

B281

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

30

18

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

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: 

C: 

B352

B355

1 2 3 4
5 6 7 8

C26

B116

8

7

i84

A:

B280

B:

B281

C:

B20

B30

E

BODY INTEGRATED MODULE

SELECT
LEVER

3

12

TCM

B54

2

4

5

7

B352

JOINT
CONNECTOR

B355

JOINT
CONNECTOR

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

SPORT MODE
AND MANUAL
MODE SWITCH

4AT(diag)-116

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

• RHD model

AT-03163

i84

B280

B54

B116

B281

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

30

18

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

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: 

C: 

C26

B116

8

7

i84

A:

B280

B:

B281

C:

B20

B30

E

3

12

B54

BODY INTEGRATED MODULE

SELECT
LEVER

TCM

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

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

SPORT MODE
AND MANUAL
MODE SWITCH