Subaru Legacy (2005 year). Manual - part 790

 

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Subaru Legacy (2005 year). 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”?

Go to step 2.

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”?

Go to step 3.

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.

Go to step 4.

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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