Subaru Legacy III (2000-2003 year). Service manual — part 749
VDC-32
VDC (DIAGNOSTICS)
LIST OF DIAGNOSTIC TROUBLE CODE (DTC)
If any of the following multiple diagnostic trouble codes (DTCs) are present in memory, check the area cor-
responding to the first diagnostic trouble code (DTC). If no problem is detected, check the areas correspond-
ing to the other diagnostic trouble codes (DTCs) in order of their appearance.
73
Lateral G sensor offset
is too big.
Lateral G sensor offset
is too big.
73
Abnormal lateral G sen-
sor output
Abnormal lateral G sen-
sor output
<Ref. to VDC-254, DTC 73 ABNORMAL LATERAL G SENSOR
OUTPUT, Diagnostics Chart with Select Monitor.>
73
Change range of lateral
G sensor is too big.
Change range of lat-
eral G sensor is too big.
73
Excessive lateral G sen-
sor signal
Excessive lateral G
sensor signal
<Ref. to VDC-256, DTC 73 EXCESSIVE LATERAL G SENSOR
SIGNAL, Diagnostics Chart with Select Monitor.>
73
Voltage inputted to lat-
eral G sensor exceeds
specification.
Voltage inputted to lat-
eral G sensor exceeds
specification.
74
Voltage inputted to
pressure sensor 1
exceeds specification.
Voltage inputted to pri-
mary pressure sensor
exceeds specification.
74
Voltage inputted to
pressure sensor 2
exceeds specification.
Voltage inputted to sec-
ondary pressure sen-
sor exceeds
specification.
74
Pressure sensor 1 off-
set is too big.
Primary pressure sen-
sor offset is too big.
74
Pressure sensor 2 off-
set is too big.
Secondary pressure
sensor offset is too big.
74
Differential pressure of
pressure sensor is too
big.
Differential pressure of
pressure sensor is too
big.
Combination of DTC No.
Problem area
Index No.
46 Abnormal voltage of 5 V power supply
74 Voltage inputted to pressure sensor 2
exceeds specification.
(F87) — No. 78, 68 or 69 lead circuit
is shorted to ground or battery.
44 TCM communication circuit
71 No signal from steering angle sensor
(F87) — No. 83 or 81 lead circuit is
open.
51 Valve relay
48 Improper EAC communication
71 No signal from steering angle sensor
(F87) — No. 27 lead circuit is open.
71 No signal from steering angle sensor
51 Valve relay
44 TCM communication circuit
(F87) — No. 27 lead circuit is open.
73 Voltage inputted to lateral G sensor
exceeds specification.
72 Voltage inputted to yaw rate sensor
exceeds specifications.
(F87) — No. 23 lead circuit is open.
DTC No.
Display screen
Contents of diagnosis
Index No.
VDC-33
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
13.Diagnostics Chart with Diagnosis Connector
A: ABS WARNING LIGHT, VDC WARNING LIGHT, VDC OPERATING INDICA-
TOR LIGHT OR VDC OFF INDICATOR LIGHT DOES NOT COME ON.
DIAGNOSIS:
• ABS warning light circuit is open or shorted.
• VDC warning light circuit is open or shorted.
• VDC operating indicator light circuit is open or shorted.
• VDC OFF indicator light circuit is open or shorted.
TROUBLE SYMPTOM:
• When ignition switch is turned ON (engine OFF), ABS warning light, VDC warning light, VDC operating in-
dicator light or VDC OFF indicator light does not come on.
NOTE:
When pushing the VDC OFF switch for 10 seconds or more while revving the engine, the VDC OFF indicator
light goes off and operations cannot be continued. Turn ignition switch from OFF to ON again to recover the
previous condition.
VDC-34
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
WIRING DIAGRAM:
• 3.0 L model
VDC00173
NO. 18 15A
SBF-4
DIAGNOSIS
TERMINAL
b5
a8
c7
L
b9
b3
c9
VDC W
A
RNING
LIGHT
VDC
OPERA
TING
b2
R
c10
c6
b1
VDC OFF
ABS
W
ARNING
G1
E1
F1
H1
18
12
11
13
20
5
R
L
13
R
L
14
7
4
16
10
54
32
52
53
13
40
55
1
28
SBF-1 100A
NO. 5 15A
8
DIAGNOSIS
CONNECTOR
VDC OFF
SWITCH
VDC CONTROL MODULE
i1
B36
B81
B82
F87
i10
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
B82
1 2
3
4 5 6 7 8
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
B36
B4 B5 B6
A4 A5 A6
C5 C6
F6
D4 D5 D6
F1
H1
C4
G6
G1
C2
K1
M1 M2
K6
L1
D1 D2
A1 A2
B1 B2
I6
J6
L2
I1
J1
H6
M4 M5 M6
L4 L5 L6
N5 N6
O4 O5 O6
N4
P4 P5
N2
O1 O2
P1 P2
N3
O3
P3
P6
A3
B3
C3
E4 E5 E6
E1 E2
i10
a:
i11
b:
i12
B255
F96
c:
COMBINATION
METER
BATTERY
IGNITION
SWITCH
IGNITION
RELAY
i62
i61
i60
i1
B36
: LHD MODEL
: RHD MODEL
L
R
3
5
6
16
J1
i62
1
2
3 4 5 6
i12
1 2 3
8
9 10
4
11 12 13
14 15 16
5 6 7
17 18
i11
1 2 3
8 9 10
4
11 12 13 14 15 16
5 6 7
RHD
RHD
LHD
LHD
RHD
LHD
LHD
RHD
B62
L
:
B100
R
:
F45
L
:
F2
R
:
F2
i60
R
:
F96
R
:
F45
L
:
F96
L
:
1 2 3 4
5 6 7
8 9 10 11 12 13 14 15 16
3 4
1 2
8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
5 6
7
1 2 3
4 5 6
7 8 9 10 11 12 13 14
1 2 3
8
9 10
4
11 12 13 14 15 16
5 6 7
17 18
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
VDC-35
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
• Except 3.0 L model
VDC00172
NO. 18 15A
SBF-4
DIAGNOSIS
TERMINAL
C3
c11
a1
a2
c4
VDC W
A
RNING
LIGHT
VDC
OPERA
TING
c6
VDC OFF
ABS
W
ARNING
G1
E1
H1
18
12
11
13
20
5
R
L
13
R
L
14
7
4
16
10
54
32
52
53
13
40
55
1
28
SBF-1 100A
NO. 5 15A
8
DIAGNOSIS
CONNECTOR
VDC OFF
SWITCH
VDC CONTROL MODULE
i1
B36
B81
B82
F87
i10
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
B82
1 2
3
4 5 6 7 8
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
B36
B4 B5 B6
A4 A5 A6
C5 C6
F6
D4 D5 D6
F1
H1
C4
G6
G1
C2
K1
M1 M2
K6
L1
D1 D2
A1 A2
B1 B2
I6
J6
L2
I1
J1
H6
M4 M5 M6
L4 L5 L6
N5 N6
O4 O5 O6
N4
P4 P5
N2
O1 O2
P1 P2
N3
O3
P3
P6
A3
B3
C3
E4 E5 E6
E1 E2
i10
a:
i12
c:
B255
F96
COMBINATION
METER
BATTERY
IGNITION
SWITCH
IGNITION
RELAY
i62
i61
i60
i1
B36
: LHD MODEL
: RHD MODEL
L
R
3
5
6
16
J1
i62
1
2
3 4 5 6
i12
1 2 3
8
9 10
4
11 12 13
14 15 16
5 6 7
17 18
RHD
RHD
LHD
LHD
RHD
LHD
LHD
RHD
B62
L
:
B100
R
:
F45
L
:
F2
R
:
F2
i60
R
:
F96
R
:
F45
L
:
F96
L
:
1 2 3 4
5 6 7
8 9 10 11 12 13 14 15 16
3 4
1 2
8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
5 6
7
1 2 3
4 5 6
7 8 9 10 11 12 13 14
1 2 3
8
9 10
4
11 12 13 14 15 16
5 6 7
17 18
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
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