Subaru Legacy (2005 year). Manual — part 793

VDC(diag)-37

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Warning Light Illumination Pattern

Step

Check

Yes

No

1

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

Is the connector firmly
inserted?

Go to step 2.

Insert VDCCM&H/
U connector until it
is locked by clamp.

2

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.

Go to step 3.

3

CHECK BRAKE FLUID AMOUNT.
Check the amount of brake fluid in the reser-
voir 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 more than 1
M

Ω?

Go to step 5.

Replace the mas-
ter cylinder.

5

CHECK PARKING BRAKE SWITCH.
1) Disconnect the connector (R4) 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 more than 1
M

Ω?

Go to step 6.

Replace the park-
ing brake switch.

6

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

Connector & terminal

(i10) No. 7 — Chassis ground:

Is the resistance more than 1
M

Ω?

Go to step 7.

Repair the har-
ness connector
between combina-
tion meter brake
fluid level switch
and parking brake
switch.

7

CHECK HARNESS CONNECTOR.
1) Disconnect the connector (B310) from
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. 20 — (i10) No. 7:

Is the resistance less than 0.5
Ω?

Go to step 8.

Repair the har-
ness connector
between
VDCCM&H/U and
combination
meter.

8

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

Is there poor contact?

Repair the con-
nector.

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
Ω?

Check the combi-
nation meter.

Replace the
VDCCM&H/U.

VDC(diag)-38

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

11.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Detailed

code

Display

Contents of diagnosis

Reference target

C0021

698XH

FR sensor power supply
failure

Abnormal power sup-
ply of front ABS wheel
speed sensor RH

<Ref. to VDC(diag)-44, DTC C0021 FRONT ABS
WHEEL SPEED SENSOR RH POWER SUPPLY
MALFUNCTION, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

6A0XH

Front Right ABS Sensor
Circuit Open or Shorted
Battery

Open / high input of
front ABS wheel speed
sensor RH

<Ref. to VDC(diag)-46, DTC C0021 OPEN/HIGH
INPUT OF FRONT ABS WHEEL SPEED SEN-
SOR RH, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0022

68CXH
68EXH

690XH
694XH
696XH

Front Right ABS Sensor
Signal

Front ABS wheel speed
sensor RH signal mal-
function

<Ref. to VDC(diag)-51, DTC C0022 FRONT ABS
WHEEL SPEED SENSOR RH SIGNAL MAL-
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

C0023

618XH

FL sensor power sup-
ply failure

Front ABS wheel speed
sensor LH power sup-
ply malfunction

<Ref. to VDC(diag)-44, DTC C0023 FRONT ABS
WHEEL SPEED SENSOR LH POWER SUPPLY
MALFUNCTION, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

620XH

Front Left ABS Sensor
Circuit Open or Shorted
Battery

Open / high input of
front ABS wheel speed
sensor LH

<Ref. to VDC(diag)-46, DTC C0023 OPEN/HIGH
INPUT OF FRONT ABS WHEEL SPEED SEN-
SOR LH, Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0024

60CXH
60EXH

610XH
614XH
616XH

Front Left ABS Sensor
Signal

Front ABS wheel speed
sensor LH signal mal-
function

<Ref. to VDC(diag)-51, DTC C0024 FRONT ABS
WHEEL SPEED SENSOR LH SIGNAL MAL-
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

C0025

658XH

RR sensor power sup-
ply failure

Rear ABS wheel speed
sensor RH power sup-
ply malfunction

<Ref. to VDC(diag)-44, DTC C0025 REAR ABS
WHEEL SPEED SENSOR RH POWER SUPPLY
MALFUNCTION, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

660XH

Rear Right ABS Sensor
Circuit Open or Shorted
Battery

Open / high input of
rear ABS wheel speed
sensor RH

<Ref. to VDC(diag)-46, DTC C0025 OPEN/HIGH
INPUT OF REAR ABS WHEEL SPEED SENSOR
RH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

C0026

64CXH
64EXH

650XH
654XH
656XH

Rear Right ABS Sensor
Signal

Rear ABS wheel speed
sensor RH signal mal-
function

<Ref. to VDC(diag)-51, DTC C0026 REAR ABS
WHEEL SPEED SENSOR RH SIGNAL MAL-
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

C0027

6D8XH

RL sensor power supply
failure

Rear ABS wheel speed
sensor LH power sup-
ply malfunction

<Ref. to VDC(diag)-45, DTC C0027 REAR ABS
WHEEL SPEED SENSOR LH POWER SUPPLY
MALFUNCTION, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

6E0XH

Rear Left ABS Sensor
Circuit Open or Shorted
Battery

Open / high input of
rear ABS wheel speed
sensor LH

<Ref. to VDC(diag)-47, DTC C0027 OPEN/HIGH
INPUT OF REAR ABS WHEEL SPEED SENSOR
LH, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

C0028

6CCXH
6CEXH

6D0XH
6D4XH
6D6XH

Rear Left ABS Sensor
Signal

Rear ABS wheel speed
sensor LH signal mal-
function

<Ref. to VDC(diag)-51, DTC C0028 REAR ABS
WHEEL SPEED SENSOR LH SIGNAL MAL-
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

VDC(diag)-39

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

C0029

608XH
648XH
688XH

6C8XH

704XH
606XH
646XH
686XH

6C6XH

702XH
604XH
644XH
684XH

6C4XH
70CXH

720XH
710XH

Any One of Four ABS
Sensors Signal

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

<Ref. to VDC(diag)-55, DTC C0029 ABS WHEEL
SPEED SENSOR SIGNAL MALFUNCTION IN
ONE OF FOUR WHEELS, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

C0031

320XH

FR hold valve malfunc-
tion

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

<Ref. to VDC(diag)-59, DTC C0031 FRONT
INLET SOLENOID VALVE RH MALFUNCTION
IN VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0032

360XH

FR pressure reducing
valve malfunction

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

<Ref. to VDC(diag)-59, DTC C0032 FRONT OUT-
LET SOLENOID VALVE RH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0033

220XH

FL hold valve malfunc-
tion

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

<Ref. to VDC(diag)-59, DTC C0033 FRONT
INLET SOLENOID VALVE LH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0034

260XH

FL pressure reducing
valve malfunction

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

<Ref. to VDC(diag)-59, DTC C0034 FRONT OUT-
LET SOLENOID VALVE LH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0035

2A0XH

RR hold valve malfunc-
tion

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

<Ref. to VDC(diag)-59, DTC C0035 REAR INLET
SOLENOID VALVE RH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0036

2E0XH

RR pressure reducing
valve malfunction

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

<Ref. to VDC(diag)-60, DTC C0036 REAR OUT-
LET SOLENOID VALVE RH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0037

3A0XH

RL hold valve malfunc-
tion

Rear inlet solenoid
valve LH malfunction in
VDCCM&H/U

<Ref. to VDC(diag)-60, DTC C0037 REAR INLET
SOLENOID VALVE LH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

C0038

3E0XH

RL pressure reducing
valve malfunction

Rear outlet solenoid
valve LH malfunction in
VDCCM&H/U

<Ref. to VDC(diag)-60, DTC C0038 REAR OUT-
LET SOLENOID VALVE LH MALFUNCTION IN
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>

DTC

Detailed

code

Display

Contents of diagnosis

Reference target

VDC(diag)-40

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

C0041

000XH
002XH
004XH
006XH
010XH
012XH
014XH
016XH
018XH

01AXH
01EXH

024XH
026XH
028XH

02AXH
02CXH
02EXH

030XH

03AXH
03CXH
03DXH
03EXH

034XH
036XH
038XH

ECM

VDC control module
(VDCCM) malfunction

<Ref. to VDC(diag)-63, DTC C0041 VDC CON-
TROL MODULE MALFUNCTION, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

C0042

7CEXH

7D0XH

Power supply voltage
failure

Power voltage malfunc-
tion

<Ref. to VDC(diag)-64, DTC C0042 POWER
VOLTAGE MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

7CCXH

Speed sen. power sup-
ply failure

ABS wheel speed sen-
sor power malfunction

<Ref. to VDC(diag)-66, DTC C0042 ABS WHEEL
SPEED SENSOR POWER MALFUNCTION,
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

C0044

9A0XH

TCM communication
circuit

CAN communication
malfunction of transmis-
sion control module

<Ref. to VDC(diag)-67, DTC C0044 AT COMMU-
NICATION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>

C0045

970XH
822XH

Incorrect VDC Control
Module specifications

Different VDC control
module specification

<Ref. to VDC(diag)-68, DTC C0045 DIFFERENT
VDC CONTROL MODULE SPECIFICATION,
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>

972XH

TCM malfunction

AT control module mal-
function

<Ref. to VDC(diag)-69, DTC C0045 AT CON-
TROL MODULE MALFUNCTION, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>

C0047

788XH

78CXH
7A0XH
7A4XH

Improper CAN commu-
nication

Improper CAN commu-
nication

<Ref. to VDC(diag)-70, DTC C0047 IMPROPER
CAN COMMUNICATION, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

C0051

048XH

Valve relay OFF failure

Valve relay OFF mal-
function

<Ref. to VDC(diag)-73, DTC C0051 VALVE
RELAY OFF MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

04AXH
04CXH

Valve relay

Valve relay system

<Ref. to VDC(diag)-75, DTC C0051 VALVE
RELAY MALFUNCTION, Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>

06AXH

Valve relay test failure

Valve relay test mal-
function

<Ref. to VDC(diag)-77, DTC C0051 VALVE
RELAY TEST MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

00DXH

Valve relay ON failure

Valve relay ON mal-
function

<Ref. to VDC(diag)-79, DTC C0051 VALVE
RELAY ON MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

DTC

Detailed

code

Display

Contents of diagnosis

Reference target