Subaru Legacy III (2000-2003 year). Manual — part 800

VDC-236

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

7

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.

A temporary poor
contact.

8

CHECK VDCCM.
1) Turn ignition switch to OFF.
2) Replace steering angle sensor.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.

Is the same diagnostic trouble code as in
the current diagnosis still being output?

Same DTC indicated.

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

Go to step 9.

9

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 steer-
ing angle sensor
has been faulty.

Step

Value

Yes

No

VDC-237

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

MEMO:

VDC-238

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

AT:DTC 72 ABNORMAL YAW RATE SENSOR OUTPUT

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-239

VDC (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SELECT MONITOR

Step

Value

Yes

No

1

CHECK RUNNING FIELD.
Was the vehicle driven on banked road sur-
faces or sandy surfaces (not dirt road sur-
faces)?

Driven.

Driving on banked
road surfaces or
sandy surfaces
(not dirt road sur-
faces) sometimes
results in a
VDCCM memory
diagnostic trouble
code.

Go to step 2.

2

CHECK INSTALLATION OF YAW RATE AND
LATERAL G SENSOR.
Check installation of yaw rate and lateral G
sensor.
Is the yaw rate and lateral G sensor fixed
securely?

Fixed securely.

Go to step 3.

Install yaw rate
and lateral G sen-
sor securely.

3

CHECK OUTPUT OF YAW RATE AND LAT-
ERAL G SENSOR USING SELECT MONI-
TOR.
1) Drive the vehicle on a flat road.
2) Stop the vehicle in a straight line.
3) Select “Current data display & Save” on the

select monitor.

4) Read yaw rate and lateral G sensor output

on the select monitor display.
Is the measured value within the specified
range?

0

±

5.25 deg/s

Go to step 4.

Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sensor.>

4

CHECK OUTPUT OF STEERING ANGLE
SENSOR USING SELECT MONITOR.
1) Drive the vehicle on a flat road.
2) Stop the vehicle in a straight line.
3) Select “Current data display & Save” on the

select monitor.

4) Read steering angle sensor output on the

select monitor display.
Is the measured value within the specified
range?

0

±

2.5 deg

Go to step 5.

Perform centering
alignment of steer-
ing wheel.

5

CHECK YAW RATE AND LATERAL G SEN-
SOR.
1) Turn ignition switch to OFF.
2) Connect all connectors.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.

Is the same diagnostic trouble code as in
the current diagnosis still being output?

Same DTC indicated.

Go to step 6.

Go to step 7.

6

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.

A temporary poor
contact.

7

CHECK VDCCM.
1) Turn ignition switch to OFF.
2) Replace yaw rate and lateral G sensor.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.

Is the same diagnostic trouble code as in
the current diagnosis still being output?

Same DTC indicated.

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

Go to step 8.