Subaru Legacy IV (2008 year). Service manual — part 1177

LAN(diag)-42

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK FUSE.
1) Turn the ignition switch to OFF.
2) Remove the fuse (No. 31).

Is the fuse blown out?

Replace the fuse
(No. 31). If the
replaced fuse has
blown out easily,
repair the short cir-
cuit of harness
between fuse (No.
31) and body inte-
grated unit.

Go to step 2.

2

CONTINUITY CHECK OF WIRING HAR-
NESS.
1) Disconnect the connector (i84) from body
integrated unit.
2) Turn the ignition switch to ON.
3) Measure the voltage between body inte-
grated unit connector and chassis ground.

Connector & terminal

(i84) No. 24 (+) — Chassis ground (–):

Is the voltage 9 — 15 V?

Go to step 3.

Repair the harness
for open or shorted
circuit between
body integrated
unit and fuse.

3

CHECK POOR CONTACT IN CONNECTOR.

Is there poor contact in body
integrated unit connector?

Repair the poor
contact of connec-
tor.

Go to step 4.

4

CHECK BODY INTEGRATED UNIT HAR-
NESS.
1) Connect all connectors.
2) Perform the Clear Memory Mode.
3) Read DTC.

Is DTC displayed?

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

Temporary poor
contact occurs.

LAN(diag)-43

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

F: DTC B1105 KEY INTERLOCK CIRCUIT ABNORMAL

DTC DETECTING CONDITION:
Key interlock circuit is shorted to ground.
TROUBLE SYMPTOM:
• There is no key interlock power supply.
• Key interlock does not release or does not keep lock condition.
WIRING DIAGRAM:

LAN00169

B5

FB-28

F/B FUSE

NO.31 (ACC)

FB-37

F/B FUSE

NO.12 (IG)

MB-28

M/B FUSE

NO.14 (B)

E

3

4

2

1

A24

C7

C1

A1

i84

A:

B280

B:

B281

C:

B350

B350

B280

B:

B350

1 2 3 4

B281

C:

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

5

4

6 7

8

2

1

9

3

10

22

23

11 12 13 14 15

24 25

26 27

16 17 18

28 29

19 20

21

30

i84

A:

1 2

3 4

5 6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

TO POWER SUPPLY CIRCUIT

KEY WARNING SWITCH

BODY INTEGRATED UNIT

KEY LOCK
SOLENOID

LAN(diag)-44

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK KEY LOCK SOLENOID.
1) Disconnect the connector of key lock sole-
noid.
2) Measure the internal resistance of key lock
solenoid.

Connector & terminal

(B350) No. 1 — No. 2:

Is the resistance between 10 —
20

:?

Go to step 2.

Replace the key
lock solenoid.

2

CHECK GROUND CIRCUIT.
1) Disconnect the connector of key lock sole-
noid.
2) Measure the resistance between the key
lock solenoid connector and chassis ground.

Connector & terminal

(B350) No. 1 — Chassis ground:

Is the resistance less than 10

:? Go to step 3.

Check the key lock
solenoid ground
circuit for short cir-
cuit and confirm
the correct installa-
tion. Repair the
ground circuit if
defective.

3

CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280) and key lock solenoid connector
(B350).
2) Measure the resistance between body inte-
grated unit connector and chassis ground.

Connector & terminal

(B280) No. 5 — Chassis ground:

Is the resistance 1 M

: or

more?

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

Repair the short
circuit of harness
or replace har-
ness.

LAN(diag)-45

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

G: DTC B1106 SHIFT LOCK CIRCUIT FAILURE

DTC DETECTING CONDITION:
Shift lock circuit is shorted to ground.
TROUBLE SYMPTOM:
Shift lock does not be released or remain locked.
WIRING DIAGRAM:

B6

TO POWER SUPPLY CIRCUIT

FB-28

F/B FUSE

NO.31 (ACC)

FB-37

F/B FUSE

NO.12 (IG)

MB-28

M/B FUSE

NO.34 (B)

FB-3

F/B FUSE

NO.8 (B)

E

F9

F5

3

4

A24

C23

C1

A1

i84

A:

B280

B:

B281

C:

B159

F:

BODY INTEGRATED
UNIT

B116

SHIFT LOCK
SOLENOID

JOINT FUSE
BOX

STOP LIGHT
SWITCH

3

2

B65

LAN00195

1 2

3 4

11

6 7 8 9 10

B116

1 2

3 4

9

5 6

7

8

B159

F:

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

B281

C:

5

4

6 7

8

2

1

9

3

10

22

23

11 12 13 14 15

24 25

26 27

16 17 18

28 29

19 20

21

30

B280

B:

3

4

1

2

1 2

3 4

5 6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

A:

i84

B65

5

12