Subaru Legacy III (2000-2003 year). Service manual — part 781
VDC-160
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SELECT MONITOR
W: DTC 41 ELECTRICAL CONTROL MODULE (VDC CONTROL MODULE MAL-
FUNCTION)
DIAGNOSIS:
• Faulty VDCCM
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
WIRING DIAGRAM:
VDC00143
VDC
CONTROL
MODULE
1
55
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-161
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SELECT MONITOR
Step
Value
Yes
No
1
CHECK GROUND CIRCUIT OF VDCCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 1 — Chassis ground:
(F87) No. 55 — Chassis ground:
Is the measured value less than the speci-
fied value?
0.5
Ω
Repair VDCCM
ground harness.
2
CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connectors between
battery, ignition switch and VDCCM?
There is poor contact.
Repair connector.
3
CHECK SOURCES OF SIGNAL NOISE.
Is the car telephone or the wireless transmitter
properly installed?
Tightened securely.
Properly install the
car telephone or
the wireless trans-
mitter.
4
CHECK SOURCES OF SIGNAL NOISE.
Are noise sources (such as an antenna)
installed near the sensor harness?
Installed properly.
Install the noise
sources apart from
the sensor har-
ness.
5
CHECK VDCCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) 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).>
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.
VDC-162
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SELECT MONITOR
X: DTC 42 POWER SUPPLY VOLTAGE LOW
DIAGNOSIS:
• Power source voltage of the VDCCM is low.
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
WIRING DIAGRAM:
VDC00144
VDC CONTROL MODULE
1
55
28
F87
SBF-1
GENERATOR
SBF-4
IGNITION
SWITCH
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
BATTERY
NO
. 18 15A
VDC-163
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SELECT MONITOR
Step
Value
Yes
No
1
CHECK GENERATOR.
1) Start engine.
2) Idling after warm-up.
3) Measure voltage between generator B ter-
minal and chassis ground.
Terminal
Generator B terminal (
++++
) — Chassis
ground (
−−−−
):
Is the measured value within the specified
range?
10 — 15 V
Repair generator.
2
CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
Are the positive and negative battery terminals
tightly clamped?
Clamped securely.
Tighten the clamp
of terminal.
3
CHECK INPUT VOLTAGE OF VDCCM.
1) Disconnect connector from VDCCM.
2) Run the engine at idle.
3) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 28 (+) — Chassis ground (
−−−−
):
Is the measured value within the specified
range?
10 — 15 V
Repair harness
connector
between battery,
ignition switch and
VDCCM.
4
CHECK GROUND CIRCUIT OF VDCCM.
1) Turn ignition switch to OFF.
2) Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 1 — Chassis ground:
(F87) No. 55 — Chassis ground:
Is the measured value less than the speci-
fied value?
0.5
Ω
Repair VDCCM
ground harness.
5
CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connectors between
generator, battery and VDCCM?
There is poor contact.
Repair connector.
6
CHECK VDCCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) 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).>
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.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст