Subaru Legacy IV (2008 year). Manual - part 945

 

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Subaru Legacy IV (2008 year). Manual - part 945

 

 

VDC(diag)-95

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

2

CHECK YAW RATE & LATERAL G SENSOR 
GROUND CIRCUIT.
Measure the resistance between the yaw rate & 
lateral G sensor and chassis ground.

Connector & terminal

(B230) No. 4 — Chassis ground:

Is the resistance less than 0.5 

:? Go to step 3.

Repair the ground 
circuit of the yaw 
rate & lateral G 
sensor.

3

CHECK YAW RATE & LATERAL G SENSOR 
HARNESS.
1) Disconnect the connector from the 
VDCCM&H/U.
2) Measure the resistance between VDCCM& 
H/U and yaw rate & lateral G sensor.

Connector & terminal

(B230) No. 3 — (B310) No. 10:
(B230) No. 2 — (B310) No. 35:

Is the resistance less than 0.5 

:? Go to step 4.

Repair the harness 
between yaw rate 
& lateral G sensor 
and VDCCM& H/U.

4

CHECK GROUND SHORT CIRCUIT FOR 
YAW RATE & LATERAL G SENSOR HAR-
NESS.
Measure the resistance between the yaw rate & 
lateral G sensor and chassis ground.

Connector & terminal

(B230) No. 2 — Chassis ground:
(B230) No. 3 — Chassis ground:

Is the resistance 1 M

: or 

more?

Go to step 5.

Repair the harness 
between yaw rate 
& lateral G sensor 
and VDCCM& H/U.

5

CHECK YAW RATE & LATERAL G SENSOR.
1) Turn the ignition switch to OFF.
2) Connect all connectors.
3) Clear the memory. <Ref. to VDC(diag)-23, 
Clear Memory Mode.>
4) Perform the Inspection Mode. <Ref. to 
VDC(diag)-22, Inspection Mode.>
5) Read the DTC. 

Is the same DTC displayed?

Go to step 6.

Go to step 7.

6

CHECK YAW RATE & LATERAL G SENSOR.
1) Turn the ignition switch to OFF.
2) Replace the yaw rate & lateral G sensor.
3) Clear the memory. <Ref. to VDC(diag)-23, 
Clear Memory Mode.>
4) Perform the Inspection Mode. <Ref. to 
VDC(diag)-22, Inspection Mode.>
5) Read the DTC. 

Is the same DTC displayed?

Replace the 
VDCCM only. 
<Ref. to VDC-10, 
REPLACEMENT, 
VDC Control Mod-
ule and Hydraulic 
Control Unit 
(VDCCM&H/U).>

Go to step 8.

7

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC. <Ref. to 
VDC(diag)-34, List 
of Diagnostic Trou-
ble Code (DTC).>

Temporary poor 
contact occurs.

8

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC. <Ref. to 
VDC(diag)-34, List 
of Diagnostic Trou-
ble Code (DTC).>

Malfunction is 
found in original 
yaw rate & lateral 
G sensor.

Step

Check

Yes

No

VDC(diag)-96

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

AW:DTC C0073 LATERAL G SENSOR OFFSET IS TOO BIG

NOTE:
For the diagnostic procedure, refer to DTC C0073 “EXCESSIVE LATERAL G SENSOR SIGNAL”. <Ref. to
VDC(diag)-97, DTC C0073 EXCESSIVE LATERAL G SENSOR SIGNAL, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

AX:DTC C0073 ABNORMAL LATERAL G SENSOR OUTPUT

NOTE:
For the diagnostic procedure, refer to DTC C0073 “EXCESSIVE LATERAL G SENSOR SIGNAL”. <Ref. to
VDC(diag)-97, DTC C0073 EXCESSIVE LATERAL G SENSOR SIGNAL, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

VDC(diag)-97

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

AY:DTC C0073 EXCESSIVE LATERAL G SENSOR SIGNAL

DTC DETECTING CONDITION:
Lateral G sensor malfunction
TROUBLE SYMPTOM:
VDC does not operate.
WIRING DIAGRAM:

VDC00473

1 2 3 4

B310

VDCCM & H/U

25

10

35

B231

B230

2

4

1

1

4

2

3

3

STEERING
ANGLE
SENSOR

YAW RATE & 
LATERAL G 
SENSOR

E

E

B231

SBF-6

MAIN SBF

No.33

E

IGNITION
SWITCH

BATTERY

B310

4 5 6 7 8 9

26 27 28 29 30

2 3

1

31 32 33 34 35 36

10 11

14 15 16 17 18 19

37 38 39 40

12 13

41 42 43 44 45 46

20 21

23

24

22

25

B230

1

2

3

4

TWISTED PAIR LINE

TWISTED PAIR LINE

B365

B170

CAN
JOINT
CONNECTOR

4

*

3

*

4

3

*

*

2

1 :

:

*

*

CAN
JOINT
CONNECTOR

TERMINAL No. OPTIONAL 
ARRANGEMENT AMONG 
1, 2, 3,11,12 AND 13

TERMINAL No. OPTIONAL 
ARRANGEMENT AMONG
8, 9, 10, 18, 19 AND 20 

4

3 :

:

*

*

TERMINAL No. OPTIONAL 
ARRANGEMENT AMONG 
1, 2, 5  AND 6 

TERMINAL No. OPTIONAL 
ARRANGEMENT AMONG
3, 4, 7 AND 8 

2

1

* *

2

1

* *

2

1

*

*

TWISTED
PAIR LINE

B170

3 4

5 6

1 2

7 8

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

B365

VDC(diag)-98

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK YAW RATE & LATERAL G SENSOR 
INSTALLATION.

Is the yaw rate & lateral G sen-
sor installation bolt tightened to 
7.5 N·m (0.76 kgf-m, 5.5 ft-lb)?

Go to step 2.

Tighten the yaw 
rate & lateral G 
sensor installation 
bolt.

2

CHECK LATERAL G SENSOR OUTPUT.
1) Park the vehicle on a level surface.
2) Select {Current Data Display & Save} in the 
Subaru Select Monitor.
3) Read the lateral G sensor output displayed 
on screen.

Is the indicated reading on the 
monitor display –1.5 — 1.5 m/s

2

?

Go to step 3.

Replace the yaw 
rate & lateral G 
sensor.

3

CHECK LATERAL G SENSOR OUTPUT.
1) Turn the ignition switch to OFF.
2) Remove the yaw rate & lateral G sensors 
from vehicle.
3) Turn the ignition switch to ON, and select the 
{Current Data Display & Save} in Subaru Select 
Monitor.
4) Read the lateral G sensor output displayed 
on screen.

When the yaw rate & lateral G 
sensor is inclined 90° to the 
right, is the indicated value 6.8 — 
12.8 m/s

2

?

Go to step 4.

Replace the yaw 
rate & lateral G 
sensor.

4

CHECK LATERAL G SENSOR.
Read the lateral G sensor output displayed on 
screen.

When the yaw rate & lateral G 
sensor is inclined 90° to the left, 
is the indicated value –6.8 — 
–12.8 m/s

2

?

Go to step 5.

Replace the yaw 
rate & lateral G 
sensor.

5

CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.

Is there poor contact in connec-
tor between VDCCM& H/U and 
yaw rate & lateral G sensor?

Repair the connec-
tor.

Go to step 6.

6

CHECK VDCCM&H/U.
1) Connect all connectors.
2) Clear the memory. <Ref. to VDC(diag)-23, 
Clear Memory Mode.>
3) Perform the Inspection Mode. <Ref. to 
VDC(diag)-22, Inspection Mode.>
4) Read the DTC. 

Is the same DTC displayed?

Replace the 
VDCCM only. 
<Ref. to VDC-10, 
REPLACEMENT, 
VDC Control Mod-
ule and Hydraulic 
Control Unit 
(VDCCM&H/U).>

Go to step 7.

7

CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diag-
nosis according to 
DTC. <Ref. to 
VDC(diag)-34, List 
of Diagnostic Trou-
ble Code (DTC).>

Temporary poor 
contact occurs.

 

 

 

 

 

 

 

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