Subaru Legacy (2005 year). Manual - part 808

VDC(diag)-97

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AU:DTC C0071 STEERING ANGLE SENSOR OUTPUT

DTC DETECTING CONDITION:
Defective steering angle sensor
TROUBLE SYMPTOM:
VDC does not operate.
WIRING DIAGRAM:
• LHD model

VDC00327

30

29

13

B231

B234

E

2

4

1

3

3

1

4

2

B310

B310

VDCCM & H/U

1 2 3 4

11 12 13 14
27 28 29 30

15 16 17 18
31 32 33 34

19 20 21 22
35 36 37 38

23 24 25 26
39 40 41 42

5

6

7

8

9

10

1 2 3 4

B231

TWISTED WIRE

STEERING
ANGLE SENSOR

B234

3 4

5 6

1 2

7 8

B352

3

1

4

2

B352

VDC(diag)-98

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

• RHD model

VDC00247

30

29

13

B231

E

2

4

1

3

B310

B310

VDCCM & H/U

1 2 3 4

11 12 13 14
27 28 29 30

15 16 17 18
31 32 33 34

19 20 21 22
35 36 37 38

23 24 25 26
39 40 41 42

5

6

7

8

9

10

1 2 3 4

B231

TWISTED WIRE

STEERING
ANGLE SENSOR

VDC(diag)-99

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

Step

Check

Yes

No

1

CHECK STEERING WHEEL.
1) Drive the vehicle on a flat road.
2) Park the vehicle straight.
3) Check the steering wheel for deviation from 
center.

Is the deviation from the center 
of steering wheel less than 5

°?

Go to step 2.

Perform the cen-
tering adjustment 
of steering wheel.

2

CHECK DRIVING PLACE.
Check if the vehicle ran the road with banks or 
sandy surface (which does not mean a dirt 
road).

Did the vehicle run the road 
with banks or sandy surface 
(which does not mean a dirt 
road)?

VDCCM&H/U may 
record DTC when 
the vehicle ran the 
road with banks or 
sandy surface 
(which does not 
mean a dirt road).

Go to step 3.

3

CHECK OUTPUT OF STEERING ANGLE 
SENSOR WITH SUBARU SELECT MONI-
TOR.
1) Select {Current Data Display & Save} in 
Subaru Select Monitor.
2) Read the steering angle sensor output dis-
played on display.

Does the steering angle sensor 
output value on the display 
vary in accordance with steer-
ing operation when turning the 
steering wheel to the right or 
left?

Go to step 4.

Replace the steer-
ing angle sensor.

4

CHECK VDCCM&H/U.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Perform the clear memory mode.
4) Perform the inspection mode.
5) Read the DTC.

Is the same DTC displayed?

Replace the 
VDCCM&H/U. 
<Ref. to VDC-7, 
VDC Control Mod-
ule and Hydraulic 
Control Unit 
(VDCCM&H/U).>

Go to step 5.

5

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC.

Temporary poor 
contact occurs.

VDC(diag)-100

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

AV:DTC C0071 STEERING ANGLE SENSOR COMMUNICATION

DTC DETECTING CONDITION:
Signal does not come from steering angle sensor.
TROUBLE SYMPTOM:
VDC does not operate.
WIRING DIAGRAM:
• LHD model

VDC00327

30

29

13

B231

B234

E

2

4

1

3

3

1

4

2

B310

B310

VDCCM & H/U

1 2 3 4

11 12 13 14
27 28 29 30

15 16 17 18
31 32 33 34

19 20 21 22
35 36 37 38

23 24 25 26
39 40 41 42

5

6

7

8

9

10

1 2 3 4

B231

TWISTED WIRE

STEERING
ANGLE SENSOR

B234

3 4

5 6

1 2

7 8

B352

3

1

4

2

B352