Subaru Legacy III (2000-2003 year). Service manual — part 758
VDC-68
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
U: DTC 32 ABNORMAL OUTLET AND SUCTION SOLENOID VALVE CIRCUIT(S)
(FRONT RH OUTLET)
NOTE:
For diagnostic procedure, refer to DTC 64. <Ref. to VDC-70, DTC 64 ABNORMAL OUTLET AND SUCTION
SOLENOID VALVE CIRCUIT(S) (SECONDARY SUCTION), Diagnostics Chart with Diagnosis Connector.>
V: DTC 34 ABNORMAL OUTLET AND SUCTION SOLENOID VALVE CIRCUIT(S)
(FRONT LH OUTLET)
NOTE:
For diagnostic procedure, refer to DTC 64. <Ref. to VDC-70, DTC 64 ABNORMAL OUTLET AND SUCTION
SOLENOID VALVE CIRCUIT(S) (SECONDARY SUCTION), Diagnostics Chart with Diagnosis Connector.>
W: DTC 36 ABNORMAL OUTLET AND SUCTION SOLENOID VALVE CIRCUIT(S)
(REAR RH OUTLET)
NOTE:
For diagnostic procedure, refer to DTC 64. <Ref. to VDC-70, DTC 64 ABNORMAL OUTLET AND SUCTION
SOLENOID VALVE CIRCUIT(S) (SECONDARY SUCTION), Diagnostics Chart with Diagnosis Connector.>
X: DTC 38 ABNORMAL OUTLET AND SUCTION SOLENOID VALVE CIRCUIT(S)
(REAR LH OUTLET)
NOTE:
For diagnostic procedure, refer to DTC 64. <Ref. to VDC-70, DTC 64 ABNORMAL OUTLET AND SUCTION
SOLENOID VALVE CIRCUIT(S) (SECONDARY SUCTION), Diagnostics Chart with Diagnosis Connector.>
Y: DTC 63 ABNORMAL OUTLET AND SUCTION SOLENOID VALVE CIRCUIT(S)
(PRIMARY SUCTION)
NOTE:
For diagnostic procedure, refer to DTC 64. <Ref. to VDC-70, DTC 64 ABNORMAL OUTLET AND SUCTION
SOLENOID VALVE CIRCUIT(S) (SECONDARY SUCTION), Diagnostics Chart with Diagnosis Connector.>
VDC-69
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
MEMO:
VDC-70
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Z: DTC 64 ABNORMAL OUTLET AND SUCTION SOLENOID VALVE CIRCUIT(S)
(SECONDARY SUCTION)
DIAGNOSIS:
• Faulty harness/connector
• Faulty solenoid valve in VDCH/U
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
WIRING DIAGRAM:
VDC00142
VDC1
1 2
F91
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
10
9
11
12
15
13
16
14
VDC HYDRAULIC UNIT
VDC5
F91
VDC CONTROL MODULE
F87
FR OUTLET
FR INLET
RL OUTLET
RL INLET
RR OUTLET
RR INLET
PRIMAR
Y CUT
PRIMAR
Y SECTION
SECOND
AR
Y CUT
PRIMAR
Y
PRESSURE SENSOR
SECOND
A
R
Y
PRESSURE SENSOR
SECOND
AR
Y SECTION
FL OUTLET
FL INLET
51
30
3
31
4
23
50
24
25
2
26
36
76
77
78
29
4
5
1
6
2
7
3
8
VDC2
VDC1
1
2
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
RELAY BOX
MOTOR RELAY
VALVE RELAY
VDC-71
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
Value
Yes
No
1
CHECK RESISTANCE OF SOLENOID
VALVE.
1) Turn ignition switch to OFF.
2) Disconnect two connectors (VDC1, F91)
from VDCH/U.
3) Measure resistance between VDCH/U con-
nector terminals.
Connector & terminal
DTC 32/(VDC5) No. 1 — (VDC2) No. 2:
DTC 34/(VDC5) No. 4 — (VDC2) No. 2:
DTC 36/(VDC5) No. 3 — (VDC2) No. 2:
DTC 38/(VDC5) No. 2 — (VDC2) No. 2:
DTC 63/(VDC5) No. 10 — (VDC2) No. 2:
DTC 64/(VDC5) No. 11 — (VDC2) No. 2:
Is the measured value within the specified
range?
3.8 — 4.8
Ω
Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
2
CHECK GROUND SHORT OF SOLENOID
VALVE.
Measure resistance between VDCH/U connec-
tor and chassis ground.
Connector & terminal
DTC 32/(VDC5) No. 1 — Chassis
ground:
DTC 34/(VDC5) No. 4 — Chassis
ground:
DTC 36/(VDC5) No. 3 — Chassis
ground:
DTC 38/(VDC5) No. 2 — Chassis
ground:
DTC 63/(VDC5) No. 10 — Chassis
ground:
DTC 64/(VDC5) No. 11 — Chassis
ground:
Does the measured value exceed the specified
value?
1 M
Ω
Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
3
CHECK BATTERY SHORT OF SOLENOID
VALVE.
1) Disconnect connector from VDCCM.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
DTC 32/(VDC5) No. 1 (+) — Chassis
ground (
−−−−
):
DTC 34/(VDC5) No. 4 (+) — Chassis
ground (
−−−−
):
DTC 36/(VDC5) No. 3 (+) — Chassis
ground (
−−−−
):
DTC 38/(VDC5) No. 2 (+) — Chassis
ground (
−−−−
):
DTC 63/(VDC5) No. 10 (+) — Chassis
ground (
−−−−
):
DTC 64/(VDC5) No. 11 (+) — Chassis
ground (
−−−−
):
Is the measured value less than the speci-
fied value?
1 V
Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
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