Subaru Legacy (2005 year). Service manual — part 1021

CC(diag)-21

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

C: DTC 13 CLUTCH SWITCH

TROUBLE SYMPTOM:
• Cruise control cannot be set.
• Cruise control cannot be released.
WIRING DIAGRAM:
• 2.5 L EC, K4 and EK model

CC-00362

B65

MAIN SBF

SBF-2

F/B No.8

B65

4

3

1

2

C8

C10

C9

1 2
3 4

B136

C:

B136

9

30

29

28

32

31

20

19

18

22

21

10

12

11

14

24

34

33

27

26

16

1

2

3

4

5

6

13

23

15

25

8

7

17

35

C:

SBF-8

F/B No.4

F5

B159

F9

F:

9

4

7

6

2

1
5

3
8

B159

F:

ECM

BATTERY

STOP LIGHT SWITCH
AND BRAKE SWITCH

BRAKE

SWITCH

STOP LIGHT

SWITCH

IGNITION

RELAY

FUSE & RELAY BOX

CLUTCH SWITCH (MT)

2

1

B107

MT

MT

1 2

B107

CC(diag)-22

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

• 2.0 L non-turbo model, 2.5 L KS, KA model

CC-00363

B65

MAIN SBF

SBF-2

F/B No.8

B65

4

3

1

2

D13

D22

D12

1 2
3 4

B137

D:

SBF-8

F/B No.4

F5

B159

F9

F:

9

4

7

6

2

1
5

3
8

B159

F:

ECM

BATTERY

STOP LIGHT SWITCH
AND BRAKE SWITCH

BRAKE

SWITCH

STOP LIGHT

SWITCH

IGNITION

RELAY

FUSE & RELAY BOX

CLUTCH SWITCH (MT)

2

1

B107

MT

MT

1 2

B107

B137

5

6

7

8

2

1

9

4

3

10

22 23

11 12 13 14 15

24 25

26

16 17

18 19 20 21

27

28 29

30 31

D:

CC(diag)-23

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK CLUTCH SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the clutch switch harness con-
nector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.

Connector & terminal

(B107) No. 1 (+) — Chassis ground (

−

):

Is the voltage more than 10 V? Go to step 2.

• Check fuse No.
4 (in fuse & relay
box).
• Check the har-
ness for open or
short between
clutch switch and
fuse & relay box.

2

CHECK CLUTCH SWITCH CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Measure the resistance between clutch
switch harness connector terminal and ECM
harness connector terminal.

Connector & terminal

2.5 L EC, K4 and EK model:

(B107) No. 2 — (B136) No. 10:

2.0 L non-turbo model, 2.5 L KS, KA mod-
el:

(B107) No. 2 — (B137) No. 22:

Is the resistance less than 10
Ω?

Go to step 3.

Repair the har-
ness.

3

CHECK CLUTCH SWITCH.
Remove and check the clutch switch. <Ref. to
CC-7, Clutch Switch.>

Is the clutch switch OK?

Replace the ECM.
<Ref. to FU(H4SO
2.0)-34, Engine
Control Module
(ECM).> <Ref. to
FU(H4SO 2.5)-37,
Engine Control
Module (ECM).>

Replace the clutch
switch.

CC(diag)-24

CRUISE CONTROL SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

D: DTC 14 NEUTRAL POSITION SWITCH

TROUBLE SYMPTOM:
Cruise control cannot be set.
WIRING DIAGRAM:
• 2.0 L turbo model, 3.0 L model

CC-00219

B137

ECM

D9

D:

B137

9

30

29

28

31

20

19

18

22

21

10

12

11

14

24

27

26

17

16

1

2

3

4

5

6

7

13

23

15

25

8

D:

B19

B55

TCM

B:

1 2 3 4

10 11 12
19 20 21

13

5 6

14 15

7

8

9

16

17

18

22

23

24

B55

B: