Subaru Legacy (2005 year). Service manual — part 792
VDC(diag)-33
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
E: VDC INDICATOR LIGHT DOES NOT GO OFF
DETECTING CONDITION:
• Defective combination meter
• Defective CAN communication
TROUBLE SYMPTOM:
When starting the engine, VDC indicator light is kept ON.
Step
Check
Yes
No
1
READ DTC.
Read the DTC. <Ref. to VDC(diag)-23, Read
Diagnostic Trouble Code (DTC).>
Is DTC displayed?
Perform the diag-
nosis according to
DTC.
2
CHECK WIRING HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector (B310) from
VDCCM&H/U.
3) Disconnect the connector (i10) from combi-
nation meter.
4) Measure the resistance between
VDCCM&H/U connector and combination
meter connector.
Connector & terminal
(B310) No. 35 — (i10) No. 5:
Is the resistance less than 0.5
Ω?
Repair the har-
ness connector
between
VDCCM&H/U and
combination
meter.
3
CHECK POOR CONTACT IN CONNECTOR.
Check poor contact in all connectors.
Is there poor contact?
Repair the con-
nector.
4
CHECK VDCCM.
1) Connect the connector (B310) to
VDCCM&H/U.
2) Turn the ignition switch to ON.
3) Measure the resistance between combina-
tion meter connector and chassis ground.
Connector & terminal
(i10) No. 5 — Chassis ground:
Is the resistance less than 0.5
Ω?
Check the combi-
nation meter.
Replace the
VDCCM&H/U.
Step
Check
Yes
No
1
READ DTC.
Read the DTC. <Ref. to VDC(diag)-23, Read
Diagnostic Trouble Code (DTC).>
Is DTC displayed?
Perform the diag-
nosis according to
DTC.
2
CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-24, OPERATION, Read Diagnostic
Trouble Code (DTC).>
Is there any fault in LAN sys-
tem?
Perform the diag-
nosis according to
DTC for LAN sys-
tem.
3
CHECK COMBINATION METER.
Check the combination meter.
Is combination meter OK?
Replace the
VDCCM&H/U.
Repair the combi-
nation meter.
VDC(diag)-34
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
F: VDC WARNING LIGHT AND VDC OFF INDICATOR LIGHT DO NOT GO OFF
DETECTING CONDITION:
• Defective combination meter
• Defective CAN communication
• Defective engine
• VDC OFF switch is shorted.
TROUBLE SYMPTOM:
When starting the engine, VDC OFF indicator light is kept ON.
NOTE:
When pressing the VDC OFF switch for more than 10 seconds, the VDC OFF indicator light goes off and can-
not operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status
is restored.
Step
Check
Yes
No
1
READ DTC.
Read the DTC. <Ref. to VDC(diag)-23, Read
Diagnostic Trouble Code (DTC).>
Is DTC displayed?
Perform the diag-
nosis according to
DTC.
2
CHECK ENGINE.
Does the malfunction indicator
light illuminate?
Repair the engine. Go to step 3.
3
CHECK ENGINE COOLANT TEMPERA-
TURE.
Warm up the engine and check if VDC warning
light and VDC OFF indicator light illumination
condition changes.
When the engine coolant tem-
perature is too low, VDC warn-
ing light and VDC OFF
indicator light illuminate. Do
the lights go off when the
engine is warmed-up?
Normal Operation Go to step 4.
4
CHECK VDC OFF SWITCH.
Remove and check VDC OFF switch.
Is VDC OFF switch normal?
Replace the VDC
OFF switch.
5
CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-24, OPERATION, Read Diagnostic
Trouble Code (DTC).>
Is there any fault in LAN sys-
tem?
Perform the diag-
nosis according to
DTC for LAN sys-
tem.
6
CHECK COMBINATION METER.
Check the combination meter.
Is combination meter OK?
Replace the
VDCCM&H/U.
Repair the combi-
nation meter.
VDC(diag)-35
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
G: BRAKE WARNING LIGHT DOES NOT GO OFF
DETECTING CONDITION:
• Brake warning light circuit is shorted.
• Defective sensor/connector
TROUBLE SYMPTOM:
After starting the engine, the brake warning light is kept on though the parking lever is released.
WIRING DIAGRAM:
• LHD model
B310
i1
B16
1
2
B38
E
MAIN SBF
SBF-6
E
No.5
B16
B97
R1
R4
A3
A4
5
1
2
1
2
B229
1 2
3 4
5 6 7 8 9 10
16
11
15
14
13
12
17
19
18
23
25
24
20
22
21
26
28
27
i10
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
B229
1 2
A:
BATTERY
IGNITION
SWITCH
BRAKE FLUID
LEVEL SWITCH
PARKING
BRAKE
SWITCH
BRAKE
WARNING
LIGHT
ABS
WARNING
LIGHT
20
35
B310
B38
i3
i10
A:
VDCCM & H/U
A7
1 2 3 4
11 12 13 14
27 28 29 30
15 16 17 18
31 32 33 34
19 20 21 22
35 36 37 38
23 24 25 26
39 40 41 42
5
6
7
8
9
10
20
9
16
B36
i1
A8
A5
B97
1 2 3
4 5 6 7
8 9 10 11 12 13 14 15 16
VDC00298
VDC(diag)-36
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
• RHD model
B310
i1
B16
1
2
B97
E
MAIN SBF
SBF-6
E
No.5
B16
B97
R1
R4
A3
A4
5
A8
16
1
2
1
2
B229
1 2
3 4
5 6 7 8 9 10
16
11
15
14
13
12
17
19
18
23
25
24
20
22
21
26
28
27
i10
2
1
3 4
6 7 8 9 10
22
21
20
19
18
17
16
15
14
13
12
11
5
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
B229
1 2
A:
BATTERY
IGNITION
SWITCH
BRAKE FLUID
LEVEL SWITCH
PARKING
BRAKE
SWITCH
BRAKE
WARNING
LIGHT
ABS
WARNING
LIGHT
20
35
B310
B36
i1
i10
A:
VDCCM & H/U
A8
A5
16
3
A7
4
1 2 3 4
11 12 13 14
27 28 29 30
15 16 17 18
31 32 33 34
19 20 21 22
35 36 37 38
23 24 25 26
39 40 41 42
5
6
7
8
9
10
VDC00318
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