Subaru Legacy III (2000-2003 year). Manual - part 801

VDC-240

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

8

CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?

Other DTC indicated.

Proceed with the 
diagnosis corre-
sponding to the 
diagnostic trouble 
code.

The original yaw 
rate and lateral G 
sensor has been 
faulty.

Step

Value

Yes

No

VDC-241

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

MEMO:

VDC-242

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

AU:DTC 72 VOLTAGE INPUTTED TO YAW RATE SENSOR EXCEEDS SPECIFI-

CATION.

DIAGNOSIS:
• Faulty yaw rate sensor
TROUBLE SYMPTOM:
• VDC does not operate.
WIRING DIAGRAM:

VDC00182

65

63

67

66

70

64

10

11

9

F88

F55

R49

4

3

12

2

4

5

8

1

5

6

R100

6

F88

R100

F55

F87

56 57

59 60

62 63

65

82 83

80

27

28

25

26

23

24

21

22

19

20

17

18

15

16

13

14

11

12

9

10

7

8

5

6

3

4

1

2

54

55

52

53

50

51

81

48

49

46

47

44

45

78

79

76

77

75

42

43

40

41

74

72

73

70

71

39

37

38

35

36

69

67

68

66

33

34

61

64

31

32

29

30

58

F87

VDC

CONTROL

MODULE

YAW RATE

AND LATERAL G

SENSOR

1

3

4 5 6

2

1 2 3

4 5

6 7 8 9 10 11 12

3

1

3

4 5 6

2

VDC-243

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

Step

Value

Yes

No

1

CHECK POWER SUPPLY OF YAW RATE 
AND LATERAL G SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from yaw rate and 

lateral G sensor.

3) Turn ignition switch to ON.
4) Measure voltage between yaw rate and lat-

eral G sensor and chassis ground.

Connector & terminal

(R100) No. 3 (

++++

) — Chassis ground (

−−−−

):

Is the measured value within the specified 
range?

10 — 15 V

Go to step 4.

Go to step 2.

2

CHECK OUTPUT VOLTAGE OF VDCCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Remove cover for VDCCM connector. 

<Ref. to VDC-19, VDCCM Connector 
Cover.>

4) Connect connector to VDCCM.
5) Turn ignition switch to ON.
6) Measure voltage between VDCCM and 

chassis ground.

Connector & terminal

(F87) No. 63 (

++++

) — Chassis ground (

−−−−

):

Is the measured value within the specified 
range?

10 — 15 V

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

Go to step 3.

3

CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in yaw rate and lateral G 
sensor connector?

There is poor contact.

Repair or replace 
VDCCM connec-
tor.

Replace VDCCM.  
<Ref. to VDC-8, 
VDC Control Mod-
ule (VDCCM).>

4

CHECK HARNESS OF YAW RATE AND LAT-
ERAL G SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM and 

yaw rate and lateral G sensor.

Connector & terminal

(F87) No. 65 — (R100) No. 4:

Is the measured value less than the speci-
fied value?

0.5 

Ω

Go to step 5.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

5

CHECK GROUND SHORT OF HARNESS.
Measure resistance between VDCCM and 
chassis ground.

Connector & terminal

(F87) No. 65 — Chassis ground:

Does the measured value exceed the specified 
value?

1 M

Ω

Go to step 6.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.

6

CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM and chas-
sis ground.

Connector & terminal

(F87) No. 65 (+) — Chassis ground (

−−−−

):

Is the measured value less than the specified 
value?

0.5 V

Go to step 7.

Repair harness 
between yaw rate 
and lateral G sen-
sor and VDCCM.