Subaru Legacy (2005 year). Manual - part 1046

LAN(diag)-63

LAN SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

P: DTC B0222 CAN-HS TCM NO-RECEIVE DATA

DTC DETECTING CONDITION:
TCM has error, harness between the main harness splice and TCM is open or shorted, connectors are not
connected securely, or the terminal has poor caulking.
TROUBLE SYMPTOM:
• SPORT indicator light illuminates.
• “Er HC” is displayed in odo/trip meter.
WIRING DIAGRAM:

LAN00029

B280

B:

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

ABSCM & H/U
VDCCM & H/U

B20

B30

BODY INTEGRATED

MODULE

B280

B:

A12

A3

TCM

B54

A:

A3

A4

5AT

4AT

ECM

B54

A:

1 2

7

8

9

5 6

3 4

10 11 12
19 20 21

13

14 15

16

17

18

22

23

24

5AT

B54

1 2

7

8 9

5

6

3

4

10 11 12

19 20 21

13 14 15 16

17 18

22 23 24

4AT A:

LAN(diag)-64

LAN SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK HARNESS.
1) Disconnect the TCM connector.
2) Measure the resistance between TCM con-
nector terminals.

Connector & terminal

4AT model

(B54) No. 3 — No. 12:

5AT model

(B54) No. 3 — No. 4:

Is the resistance 

∞ Ω?

Open harness in 
related lines of 
TCM. Repair or 
replace the open 
circuit of harness.

Go to step 2.

2

CHECK TCM.
Read the DTC of TCM using Subaru Select 
Monitor. <Ref. to 4AT(diag)-16, READ DIAG-
NOSTIC TROUBLE CODE (DTC), OPERA-
TION, Subaru Select Monitor.> <Ref. to 
5AT(diag)-17, READ DIAGNOSTIC TROUBLE 
CODE (DTC), OPERATION, Subaru Select 
Monitor.>

Is DTC other than “CAN com-
munication” displayed on Sub-
aru Select Monitor?

Perform the diag-
nosis according to 
DTC.

Replace the TCM. 
<Ref. to 4AT-66, 
Transmission Con-
trol Module 
(TCM).> <Ref. to 
5AT-61, Transmis-
sion Control Mod-
ule (TCM).>

LAN(diag)-65

LAN SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Q: DTC B0223 CAN-HS VDC/ABS NO-RECEIVE DATA

DTC DETECTING CONDITION:
Defective VDC/ABSCM. (If error is in the main harness, DTC P0600 High-speed CAN circuit is input at the
same time.)
TROUBLE SYMPTOM:
• ABS warning light and VDC warning light come on.
• “Er HC” is displayed in odo/trip meter.
WIRING DIAGRAM:

Step

Check

Yes

No

1

CHECK HARNESS.
1) Disconnect the body integrated module 
connector.
2) Measure the resistance between body inte-
grated module connector terminals.

Connector & terminal

(B280) No. 20 — No. 30:

Is the resistance 55 — 65 

Ω?

Read the DTC of 
VDC/ABSCM, and 
perform the diag-
nosis according to 
DTC.

Go to step 2.

LAN00152

B280

B:

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

VDCCM & H/U

B310

B20

B30

BODY INTEGRATED

MODULE

B280

B:

11

26

B301

ABSCM & H/U

13

29

B231

2

1

3

STEERING ANGLE
SENSOR

ABS

ABS

VDC

VDC

E

B301

4 5 6 7 8 9

16 17 18 19 20

2 3

1

21 22 23 24 25 26

10 11

13

14

12

15

B310

1 2 3 4

11 12

14 15 16 17 18 19 20 21 22 23 24 25

10

26

27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

13

7

8

6

5

9

1 2 3 4

B231

ECM

VDC : MODEL WITH VDC

: MODEL WITHOUT VDC

ABS

LAN(diag)-66

LAN SYSTEM (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

2

CHECK HARNESS.
1) Disconnect the body integrated module 
connector.
2) Measure the resistance between body inte-
grated module connector terminals.

Connector & terminal

(B280) No. 20 — No. 30:

Is the resistance 115 — 125 
Ω?

Go to step 5.

Go to step 3.

3

CHECK HARNESS.
1) Disconnect the body integrated module 
connector.
2) Measure the resistance between body inte-
grated module connector and chassis ground.

Connector & terminal

(B280) No. 20 — Chassis ground:
(B280) No. 30 — Chassis ground:

Is the resistance 

∞ Ω?

Open harness on 
related line of body 
integrated mod-
ule. Repair or 
replace the open 
circuit of harness.

Go to step 4.

4

CHECK HARNESS.
1) Disconnect the body integrated module 
connector.
2) Measure the voltage between body inte-
grated module connector and chassis ground. 
(Ignition switch ON)

Connector & terminal

(B280) No. 20 (+) — Chassis ground (

−

):

(B280) No. 30 (+) — Chassis ground (

−

):

Is the voltage more than 6 V?

Repair or replace 
the short circuit of 
harness.

Go to step 5.

5

CHECK END RESISTANCE.
1) Disconnect the VDC/ABSCM harness con-
nector.
2) Measure the resistance between VDC/
ABSCM connector terminals.

Connector & terminal

ABS

(B301) No. 11 — No. 26:

VDC

(B310) No. 13 — No. 29:

Is the resistance 115 — 125 
Ω?

Go to step 6.

End resistance is 
open. Replace the 
VDC/ABSCM. 
<Ref. to ABS-6, 
ABS Control Mod-
ule and Hydraulic 
Control Unit 
(ABSCM&H/U).> 
<Ref. to VDC-7, 
VDC Control Mod-
ule and Hydraulic 
Control Unit 
(VDCCM&H/U).>

6

CHECK HARNESS.
1) Disconnect the body integrated module 
connector and VDC/ABSCM connector.
2) Measure the resistance between body inte-
grated module connector and VDC/ABSCM 
connector terminals.

Connector & terminal
ABS

(B301) No. 11 — (B280) No. 30:
(B301) No. 26 — (B280) No. 20:

VDC

(B310) No. 13 — (B280) No. 20:
(B310) No. 29 — (B280) No. 30:

Is the resistance less than 10 
Ω?

Go to step 7.

Main wiring har-
ness is open. 
Repair or replace 
the open circuit of 
harness.

7

CHECK ABS/VDC CM.
1) Connect all the connectors.
2) Read the DTC of VDC/ABSCM using Sub-
aru Select Monitor.

Is DTC other than “CAN com-
munication” displayed on Sub-
aru Select Monitor?

Perform the diag-
nosis according to 
DTC concerning 
VDC/ABSCM.

Temporary poor 
contact occurs. 
Check the con-
necting condition 
of connector and 
terminals.

Step

Check

Yes

No