Subaru Legacy IV (2008 year). Manual - part 774

5AT(diag)-111

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

C: CHECK BUZZER

DIAGNOSIS:
Output signal circuit of buzzer is open or shorted.
TROUBLE SYMPTOM:
Buzzer remains beeping.
WIRING DIAGRAM:

AT-04896

3

21

22

i10

i84

A:

B280

B:

A26

A27

B20

B30

21

20

TCM

B55

i10

i84

B280

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

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

A:

B:

B365

i107

i106

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

1

*

2

*

1

*

2

*

 :

 :

1

*

2

*

 :

*

1 2 3 4

MAIN  SBF

SBF-6

No.

 5

E

B365

B55

5

6

7

8

2

1

9

4

3

10

24

22 23

25

11 12 13 14 15

26 27

28

16 17 18 19

20 21

29 30 31

32 33

34 35

 :

WN

 :

ON

WN

WN

ON

i107

i106

*

*

*

*

ON

WN

WN

ON

ON

WITH NAVIGATION

WITHOUT NAVIGATION

TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 1, 2, 3, 11, 12 AND 13

TERMINAL No. OPTIONAL ARRANGEMENT

TERMINAL No. OPTIONAL ARRANGEMENT
AMONG 8, 9, 10, 18, 19 AND 20

BODY INTEGRATED UNIT

B

A

TTER

Y

CAN
JOINT
CONNECTOR

CAN
JOINT
CONNECTOR

CAN

JOINT

CONNECTOR

IGNITION

SWITCH

CAN TRANSCEIVER  &  RECEIVER

MICRO

COMPUTER

DRIVE CIRCUIT

COMBINATION
METER

BUZZER
(SPORT SHIFT/ 
 MULTI INDICATOR)

5AT(diag)-112

Diagnostic Procedure without Diagnostic Trouble Code (DTC)

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK BODY INTEGRATED UNIT.
Check DTC of the body integrated unit.

Is DTC of CAN communication 
displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 2.

2

CHECK TCM.
Check DTC of TCM.

Is DTC of CAN communication 
displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 3.

3

CHECK BUZZER STOP.
Disconnect the connector (B55).

Does the buzzer stop?

Replace the TCM. 
<Ref. to 5AT-60, 
Transmission Con-
trol Module 
(TCM).>

Go to step 4.

4

CHECK BODY INTEGRATED UNIT.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data 
link connector.
3) Turn the ignition switch to ON. (engine OFF)
4) Turn the Subaru Select Monitor switch to 
ON.
5) Read the data of SPORT shift buzzer using 
Subaru Select Monitor.

Is the SPORT shift buzzer dis-
play “ON”?

Replace the body 
integrated unit. 
<Ref. to SL-56, 
Body Integrated 
Unit.>

Go to step 5.

5

CHECK COMBINATION METER. <Ref. to IDI-
5, SELF-DIAGNOSIS, INSPECTION, Combi-
nation Meter System.>.

Is the buzzer OK?

Refer to “Symp-
tom Related Diag-
nostic”. <Ref. to 
5AT(diag)-113, 
General Diagnos-
tic Table.>

Replace the com-
bination meter 
assembly. <Ref. to 
IDI-22, Combina-
tion Meter.>

5AT(diag)-113

General Diagnostic Table

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

16.General Diagnostic Table

A: INSPECTION

Symptom

Problem parts

Shifting vehicle speed is low on “D” range.

• Vehicle speed sensor 1 and vehicle speed sensor 2
• Accelerator pedal position sensor
• Throttle position sensor
• ATF temperature sensor
• CAN communication signal

Shifting vehicle speed is high on “D” range.

• Vehicle speed sensor 1 and vehicle speed sensor 2
• Accelerator pedal position sensor
• Throttle position sensor
• CAN communication signal
• Brake switch signal
• ATF temperature sensor

Excessive shift shock(“N” 

o “D” range)

• Engine idle speed
• Engine speed signal
• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• ATF temperature sensor
• Oil pressure switch 1 and front brake solenoid valve
• CAN communication signal
• Fluid level and condition
• TCM power supply

Excessive shift shock on 1st of “D” range 

o 2nd of “D” range or 

“1st of manual mode” 

o “2nd of manual mode”.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 4 and direct clutch solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

Excessive shift shock on 2nd of “D” range 

o 3rd of “D” range or 

“2nd of manual mode” 

o “3rd of manual mode”.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 5 and high & low reverse clutch solenoid 
valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

Excessive shift shock on 3rd of “D” range 

o 4th of “D” range or 

“3rd of manual mode” 

o “4th of manual mode”.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 3 and input clutch solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

5AT(diag)-114

General Diagnostic Table

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

Excessive shift shock on 4th of “D” range 

o 5th of “D” range or 

“4th of manual mode” 

o “5th of manual mode”.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Oil pressure switch 1 and front brake solenoid valve
• CAN communication signal
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

Excessive shock at kick down.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• CAN communication signal
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

Excessive shock at shift up.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Engine speed signal
• CAN communication signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

Excessive shock at lock up.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• Engine speed signal
• CAN communication signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Lock up solenoid valve
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Fluid level and condition

Excessive shock at engine brake.

• Accelerator pedal position sensor
• Throttle position sensor
• Control cable adjustment
• CAN communication signal
• Fluid level and condition
• Line pressure
• Forward brake solenoid valve

Judder is occurred at lock up.

• Fluid level and condition
• Engine speed signal
• Turbine speed sensor 1 and turbine speed sensor 2
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Accelerator pedal position sensor
• Throttle position sensor
• Lock up solenoid valve
• ATF temperature sensor

Noise at “R”, “N” and “D” range.

• Fluid level and condition
• Engine speed signal
• ATF temperature sensor

Hold at “D” range or 1st on manual mode.

• Fluid level and condition
• Vehicle speed sensor 1 and vehicle speed sensor 2
• Direct clutch solenoid valve
• Line pressure
• Up switch signal
• CAN communication signal
• Accelerator pedal position sensor

Symptom

Problem parts