Subaru Legacy III (2000-2003 year). Service manual — part 752
VDC-44
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
• Except 3.0 L model
Step
Value
Yes
No
1
OPERATE VDC OFF SWITCH.
1) Operate VDC OFF switch.
2) Turn ignition switch OFF, then turn ignition
switch ON.
Is VDC OFF indicator light off?
Indicator lights off.
The VDC is nor-
mal.
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
VDC-45
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
2
CHECK ENGINE COOLANT TEMPERA-
TURE.
Does VDC OFF indicator light come on when
engine coolant temperature is too low? Does it
go out after engine has warmed up?
Indicator lights on, when
engine coolant temperature is
too low and goes out after
warmed up.
The VDC is nor-
mal.
3
CHECK VDC OFF SWITCH.
Remove and check VDC OFF switch.
<Ref. to VDC-31, VDC Off Switch.>
Is VDC OFF switch OK?
OK.
Replace VDC OFF
switch.
4
CHECK WIRING HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect VDCCM connector from
VDCCM.
3) Turn ignition switch to ON.
Does the VDC OFF indicator light remain
off?
Indicator lights off.
Repair wiring har-
ness.
5
CHECK VDC OFF SWITCH LINE.
1) Disconnect fuse from VDC OFF switch.
2) Measure resistance between VDCCM con-
nector and chassis ground.
Connector & terminal
(F87) No. 40 — Chassis ground:
Does the measured value exceed the spec-
ified value?
1 M
Ω
Replace VDCCM.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Repair VDC OFF
switch circuit.
Step
Value
Yes
No
VDC-46
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
E: DIAGNOSTIC TROUBLE CODE (DTC) DOES NOT APPEAR.
DIAGNOSIS:
• Diagnosis circuit is open.
TROUBLE SYMPTOM:
• The ABS warning light turns on or off normally but the start code cannot be read out in the diagnostic mode.
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-47
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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