Subaru Legacy IV (2008 year). Manual - part 929

 

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Subaru Legacy IV (2008 year). Manual - part 929

 

 

VDC(diag)-31

Warning Light Illumination Pattern

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

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 10 seconds or more, the VDC OFF indicator light goes off and cannot
operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status is re-
stored.

Step

Check

Yes

No

1

READ DTC.
Read the DTC. <Ref. to VDC(diag)-21, Read 
Diagnostic Trouble Code (DTC).>

Is DTC displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 2.

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. <Ref. to 
VDC-24, VDC OFF Switch.>

Is the VDC OFF switch normal? Go to step 5.

Replace the VDC 
OFF switch.

5

CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to 
LAN(diag)-27, 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 6.

6

CHECK COMBINATION METER.
Check the combination meter.

Is combination meter OK?

Replace the 
VDCCM only.

Repair the combi-
nation meter.

VDC(diag)-32

Warning Light Illumination Pattern

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

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 remains lit though the parking lever is released.
WIRING DIAGRAM:

B16

1
2

i10

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

A:

B:

E

MAIN SBF

SBF-6

E

No.5

8

B310

B36

B16

i1

B38

i3

B404

i10

A:

i11

B:

VDCCM & H/U

A3

A7

20

16

15

1
2

1

*

2

*

2

*

B38

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

i1

5 6 7 8

2

1

9

4

3

10

24

22

23

25

27

26

28

11 12 13

14 15 16

17 18 19 20 21

VDC00658

1

*

1 2 3

4 5 6

7 8 9 10 11 12 13 14

i11

B310

4 5 6 7 8 9

26 27 28 29 30

2 3

1

31 32 33 34 35 36

10 11

14 15 16 17 18 19

37 38 39 40

12 13

41 42 43 44 45 46

20 21

23

24

22

25

BATTERY

IGNITION
SWITCH

COMBINATION 
METER

PARKING BRAKE
FLUID LEVEL 
WARNING LIGHT

BRAKE FLUID 
LEVEL SWITCH

PARKING

SWITCH

: NORMAL METER
  METER WITH MID

: A8
: A4

: NORMAL METER
  METER WITH MID

: B10
: A8

REVERSE

CIRCUIT

VDC(diag)-33

Warning Light Illumination Pattern

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK INSTALLATION OF VDCCM&H/U 
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Check that the VDCCM&H/U connector is 
inserted until it is locked by clamp.

Is the connector firmly 
inserted?

Go to step 2.

Insert the 
VDCCM&H/U con-
nector until it is 
locked by clamp.

2

READ DTC.
Read the DTC. <Ref. to VDC(diag)-21, Read 
Diagnostic Trouble Code (DTC).>

Is DTC displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 3.

3

CHECK BRAKE FLUID AMOUNT.
Check the amount of brake fluid in the reservoir 
tank of master cylinder.

Is the amount of brake fluid 
between the lines of “MAX” and 
“MIN”?

Go to step 4.

Replenish brake 
fluid to the speci-
fied value.

4

CHECK BRAKE FLUID LEVEL SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the level switch connector (B16) 
from master cylinder.
3) Measure the resistance of master cylinder 
terminals.

Terminals

No. 1 — No. 2:

Is the resistance 1 M

: or 

more?

Go to step 5.

Replace the mas-
ter cylinder.

5

CHECK PARKING BRAKE SWITCH.
1) Disconnect the connector (B404) from park-
ing brake switch.
2) Release the parking brake.
3) Measure the resistance between parking 
brake switch terminal and chassis ground.

Is the resistance 1 M

: or 

more?

Go to step 6.

Replace the park-
ing brake switch.

6

CHECK GROUND SHORT OF HARNESS.
1) Disconnect the connectors (i10 and i11) 
from the combination meter.
2) Measure the resistance between combina-
tion meter connector and chassis ground.

Connector & terminal

Normal meter model

(i10) No. 8 — Chassis ground:
(i11) No. 10 — Chassis ground:

Meter with MID model

(i10) No. 8 — Chassis ground:
(i10) No. 4 — Chassis ground:

Is the resistance 1 M

: or 

more?

Go to step 7.

Repair the harness 
connector between 
combination meter 
and brake fluid 
level switch or 
parking brake 
switch.

7

CHECK HARNESS CONNECTOR.
1) Disconnect the connector (B310) from the 
VDCCM&H/U.
2) Disconnect the connector (i10) from combi-
nation meter.
3) Measure the resistance between 
VDCCM&H/U connector and combination 
meter connector.

Connector & terminal

(B310) No. 8 — (i10) No. 7:

Is the resistance less than 0.5 

:? Go to step 8.

Repair the harness 
connector between 
VDCCM&H/U and 
combination meter.

8

CHECK POOR CONTACT IN CONNECTOR.
Check for poor contact in all connectors.

Is there poor contact?

Repair the connec-
tor.

Go to step 9.

9

CHECK VDCCM.
1) Connect the connector (B310) to 
VDCCM&H/U.
2) Turn the ignition to ON.
3) Measure the resistance between combina-
tion meter connector and chassis ground.

Connector & terminal

(i10) No. 7 — Chassis ground:

Is the resistance less than 0.5 

:? Check the combi-

nation meter.

Replace the 
VDCCM only.

VDC(diag)-34

List of Diagnostic Trouble Code (DTC)

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

11.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Detailed 

code

Display

Content of diagnosis

Reference target

C0021

07B0H

Front Right ABS Sensor 
Circuit Open or Shorted 
Battery

Open/high input of front 
ABS wheel speed sen-
sor RH

<Ref. to VDC(diag)-39, DTC C0021 FRONT 
RIGHT ABS SENSOR CIRCUIT OPEN OR 
SHORT, Diagnostic Procedure with Diagnostic 
Trouble Code (DTC).>

C0022

072FH
0736H
0737H
0738H
073AH

073CH

Front Right ABS Sensor 
Signal

Front ABS wheel speed 
sensor RH signal mal-
function

<Ref. to VDC(diag)-42, DTC C0022 FRONT 
RIGHT ABS SENSOR SIGNAL, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

C0023

06B0H

Front Left ABS Sensor 
Circuit Open or Shorted 
Battery

Open/high input of front 
ABS wheel speed sen-
sor LH

<Ref. to VDC(diag)-39, DTC C0023 FRONT LEFT 
ABS SENSOR CIRCUIT OPEN OR SHORT, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

C0024

062FH
0636H
0637H
0638H
063AH

063CH

Front Left ABS Sensor 
Signal

Front ABS wheel speed 
sensor LH signal mal-
function

<Ref. to VDC(diag)-42, DTC C0024 FRONT LEFT 
ABS SENSOR SIGNAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

C0025

09B0H

Rear Right ABS Sensor 
Circuit Open or Shorted 
Battery

Open/high input of rear 
ABS wheel speed sen-
sor RH

<Ref. to VDC(diag)-39, DTC C0025 REAR RIGHT 
ABS SENSOR CIRCUIT OPEN OR SHORT, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

C0026

092FH
0936H
0937H
0938H
093AH

093CH

Rear Right ABS Sensor 
Signal

Rear ABS wheel speed 
sensor RH signal mal-
function

<Ref. to VDC(diag)-42, DTC C0026 REAR RIGHT 
ABS SENSOR SIGNAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

C0027

08B0H

Rear Left ABS Sensor 
Circuit Open or Shorted 
Battery

Open/high input of rear 
ABS wheel speed sen-
sor LH

<Ref. to VDC(diag)-40, DTC C0027 REAR LEFT 
ABS SENSOR CIRCUIT OPEN OR SHORT, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

C0028

082FH
0836H
0837H
0838H
083AH

083CH

Rear Left ABS Sensor 
Signal

Rear ABS wheel speed 
sensor LH signal mal-
function

<Ref. to VDC(diag)-43, DTC C0028 REAR LEFT 
ABS SENSOR SIGNAL, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

C0029

0A11H
0A21H
0A42H
0A46H
0A50H

Any One of Four ABS 
Sensors Signal

ABS wheel speed sen-
sor signal malfunction 
in one of four wheels

<Ref. to VDC(diag)-46, DTC C0029 ANY OF 
WHEEL SENSORS SIGNAL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0031

0DB8H
0DC0H

FR Hold Valve malfunc-
tion

Front inlet solenoid 
valve RH malfunction in 
VDCCM&H/U

<Ref. to VDC(diag)-48, DTC C0031 FR HOLD 
VALVE MALFUNCTION, Diagnostic Procedure 
with Diagnostic Trouble Code (DTC).>

C0032

0EB8H
0EC0H

FR Pressure Reducing 
Valve malfunction

Front outlet solenoid 
valve RH malfunction in 
VDCCM&H/U

<Ref. to VDC(diag)-48, DTC C0032 FR PRES-
SURE REDUCING VALVE MALFUNCTION, 
Diagnostic Procedure with Diagnostic Trouble 
Code (DTC).>

 

 

 

 

 

 

 

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