Subaru Legacy (2005 year). Service manual — part 790
VDC(diag)-25
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Clear Memory Mode
9. Clear Memory Mode
A: OPERATION
For details concerning DTC clear operation, refer to
the “Subaru Select Monitor”. <Ref. to VDC(diag)-
16, Subaru Select Monitor.>
VDC(diag)-26
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
10.Warning Light Illumination Pattern
A: INSPECTION
1) When warning lights or indicator lights do not il-
luminate in accordance with this illumination pat-
tern, there must be an electrical malfunction.
2) When warning lights or indicator lights remain
constantly OFF, check the combination meter cir-
cuit or CAN communication circuit. <Ref. to
VDC(diag)-27, VDC WARNING LIGHT, VDC OFF
INDICATOR LIGHT AND VDC INDICATOR LIGHT
DO NOT COME ON, Warning Light Illumination
Pattern.>
3) When ABS warning light does not go off, check
the combination meter circuit. <Ref. to VDC(diag)-
31, ABS WARNING LIGHT DOES NOT GO OFF,
Warning Light Illumination Pattern.>
4) When the VDC indicator light, VDC warning light
and VDC OFF indicator light do not go off, check
the combination meter circuit or CAN communica-
tion circuit. <Ref. to VDC(diag)-33, VDC INDICA-
TOR LIGHT DOES NOT GO OFF, Warning Light
Illumination Pattern.>
NOTE:
• Even though the ABS warning light does not go
off after 1.5 seconds from ABS warning light illumi-
nation, the ABS system operates normally when
the warning light goes off while driving at approxi-
mately 12 km/h (7 MPH). However, the ABS sys-
tem does not work while the ABS warning light is
illuminated.
• It may take several minutes before VDC warning
light and VDC OFF indicator light goes off if the ve-
hicle is parked under low temperature for a speci-
fied time. This is not defective because it is resulted
from low engine coolant temperature.
• With the vehicle jack-up/lift-up or set on free roll-
ers, when the wheels lock or spin after starting the
engine, ABS warning light, VDC warning light and
VDC OFF indicator light may illuminate because
VDCCM&H/U detects the abnormal conditions
from ABS wheel speed sensors. In this case, this is
not a malfunction. Perform the clear memory mode.
(1)
Ignition switch
(7)
Light ON
(11)
Several seconds (depending on
engine coolant temperature)
(2)
OFF
(8)
1.5 sec.
(3)
ON
(9)
VDC indicator light
(12)
Brake warning light (EBD warning
light)
(4)
Engine start
(10)
VDC warning light and VDC OFF
indicator light
(5)
ABS warning light
(13)
Parking brake
(6)
Light OFF
(14)
Released
VDC00214
(2)
(6)
(6)
(7)
(6)
(6)
(7)
(8)
(6)
(6)
(7)
(11)
(3)
(3)
(4)
(1)
(5)
(9)
(10)
(6)
(7)
(12)
(14)
(13)
VDC(diag)-27
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
B: VDC WARNING LIGHT, VDC OFF INDICATOR LIGHT AND VDC INDICATOR
LIGHT DO NOT COME ON
DETECTING CONDITION:
• Defective combination meter
• Defective CAN communication
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), VDC indicator light, VDC warning light and VDC OFF
indicator light do not come 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
CHECK OTHER INDICATOR LIGHT.
Turn the ignition switch to ON.
Does other indicator light illu-
minate soon after “ON”?
Perform the self-
diagnosis of com-
bination meter.
2
CHECK VDCCM.
When the engine does not start, display the
current data of VDCCM using Subaru Select
Monitor.
Is “VDC warning light” output
set to “ON”?
Replace the
VDCCM&H/U.
3
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.
4
CHECK COMBINATION METER.
Check the combination meter.
Is combination meter OK?
Replace the
VDCCM&H/U.
Repair the combi-
nation meter
assembly.
VDC(diag)-28
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Warning Light Illumination Pattern
C: ABS WARNING LIGHT DOES NOT COME ON
DETECTING CONDITION:
• Defective combination meter
• Defective harness
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), ABS warning light does not come on.
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
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