Subaru Legacy IV (2008 year). Manual - part 1186

LAN(diag)-78

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

T: DTC U1313 CAN-LS MONITOR DATA ABNORMAL

DTC DETECTING CONDITION:
Center display unit error, or harness between the main harness splice and center display unit is open or
shorted, the connector is not connected securely and the terminal has poor crimping.
TROUBLE SYMPTOM:
“Er LC” is displayed in odo/trip meter. (Except for meter with MID)
WIRING DIAGRAM:

Step

Check

Yes

No

1

CHECK CENTER MONITOR.
1) Display the current data of body integrated 
unit using Subaru Select Monitor.
2) Display the “center display failure”.

Is OK displayed?

Go to step 2.

Refer to the navi-
gation display. 
<Ref. to ET-19, 
REMOVAL, Navi-
gation Display.>

2

CHECK NAVIGATION.
1) Display the current data of body integrated 
unit using Subaru Select Monitor.
2) Display NAVI failure.

Is OK displayed?

Refer to the navi-
gation display. 
<Ref. to ET-19, 
REMOVAL, Navi-
gation Display.>

Refer to navigation 
body. <Ref. to ET-
21, REMOVAL, 
Navigation Body.>

i106

i10

B282

21

22

14

6

i119

A27

A26

B26

B25

i84

B280

10

9

B:

A:

B:

i107

*

1

*

1

*

1

*

1

*

1

*

1

i10

LAN00383

CAN
JOINT
CONNECTOR

ON

WN

WN

ON

TWISTED PAIR LINE

TWISTED PAIR LINE

COMBINATION METER

BODY 

INTEGRATED 

UNIT

i119

1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16

1 2 3 4 5

6 7 8 9 10

11 12

19 20 21

13 14 15 16 17 18

22

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

A:

i84

1 2

3 4

5 6

7 8

9 10 11 12

14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

13

B282

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 36 37 38 39 40

*

1

ON

WN

WA

WA

WA

AUTO A/C

CONTROL 

MODULE

CENTER

DISPLAY

: TERMINAL No. OPTIONAL ARRANGEMENT

: WITH NAVIGATION

: WITHOUT NAVIGATION 

: WITH AUTO A/C

LAN(diag)-79

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

U: DTC U1321 CAN-LS METER NO-RECEIVE DATA

DTC DETECTING CONDITION:
Combination meter unit error, or harness between the main harness splice and combination meter unit is
open or shorted, the connector is not connected properly and the terminal has poor crimping.
TROUBLE SYMPTOM:
Fail mode occurs because the data is not received from combination meter unit.
WIRING DIAGRAM:

i106

i10

B282

21

22

14

6

i119

A27

A26

B26

B25

i84

B280

10

9

B:

A:

B:

i107

*

1

*

1

*

1

*

1

*

1

*

1

i10

LAN00383

CAN
JOINT
CONNECTOR

ON

WN

WN

ON

TWISTED PAIR LINE

TWISTED PAIR LINE

COMBINATION METER

BODY 

INTEGRATED 

UNIT

i119

1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16

1 2 3 4 5

6 7 8 9 10

11 12

19 20 21

13 14 15 16 17 18

22

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

A:

i84

1 2

3 4

5 6

7 8

9 10 11 12

14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

13

B282

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 36 37 38 39 40

*

1

ON

WN

WA

WA

WA

AUTO A/C

CONTROL 

MODULE

CENTER

DISPLAY

: TERMINAL No. OPTIONAL ARRANGEMENT

: WITH NAVIGATION

: WITHOUT NAVIGATION 

: WITH AUTO A/C

LAN(diag)-80

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK COMMUNICATION LINE.
1) Warm up the engine.
2) Compare the data of body integrated unit 
and combination meter using Subaru Select 
Monitor.
Check item:
• Engine speed
• Shift range

Is the data displayed same?

Go to step 2.

Perform the self-
diagnosis of com-
bination meter. 
<Ref. to IDI-5, 
SELF-DIAGNO-
SIS, INSPEC-
TION, 
Combination Meter 
System.>

2

CHECK HARNESS.
1) Disconnect the body integrated unit and 
combination meter connector.
2) Measure the resistance between harness 
connectors.

Connector & terminal

(i10) No. 21 — (i84) No. 27:
(i10) No. 22 — (i84) No. 26:

Is the resistance less than 10 

:? Go to step 4.

Go to step 3.

3

CHECK HARNESS.
Measure the resistance between harness con-
nector and chassis ground with the connector of 
the unit disconnected.

Connector & terminal

(i10) No. 21 — Chassis ground:
(i10) No. 22 — Chassis ground:

Is the resistance less than 10 

:? Go to step 4.

Repair or replace 
the open circuit of 
harness.

4

CHECK COMBINATION METER.
Perform the self-diagnosis of combination 
meter. <Ref. to IDI-5, SELF-DIAGNOSIS, 
INSPECTION, Combination Meter System.>

Is the self-diagnosis OK?

Temporary poor 
contact occurs. 
Check the connec-
tion of each con-
nector.

Replace the com-
bination meter. 
<Ref. to IDI-22, 
REMOVAL, Com-
bination Meter.>

LAN(diag)-81

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN SYSTEM (DIAGNOSTICS)

V: DTC B1500 KEYLESS UART COM. MALFUNCTION

DTC DETECTING CONDITION:
UART between keyless control unit and body integrated unit is open or shorted, the connector is not con-
nected properly, or the terminal is crimped improperly.
TROUBLE SYMPTOM:
Door lock does not operate with keyless.
WIRING DIAGRAM:

FB-10

M/B FUSE 

NO.8 (B)

4

3

7

9

A4

i84

i96

E

i84

i96

1 2 3 4
5 6 7 8

LAN00268

1 2

3 4

5 6

7 8

9 10 11 12

14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

13

TO POWER SUPPLY CIRCUIT

KEYLESS ENTRY CONTROL MODULE

BODY 

INTEGRATED 

UNIT