Subaru Legacy (2005 year). Manual — part 768

ABS(diag)-37

ABS (DIAGNOSTICS)

ABS Warning Light / Brake Warning Light Illumination Pattern

Step

Check

Yes

No

1

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

Is the connector correctly
inserted?

Go to step 2.

Insert the
ABSCM&H/U con-
nector until the
clamp locks onto
it.

2

READ DTC.
Read the DTC. <Ref. to ABS(diag)-24, Read
Diagnostic Trouble Code (DTC).>

Is DTC displayed?

Perform the diag-
nosis according to
DTC.

Go to step 3.

3

CHECK THE 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) Disconnect the level switch connector (B16)
from master cylinder.
2) 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. 8 — Chassis ground:

Is the resistance more than 1
M

Ω?

Go to step 7.

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

7

CHECK HARNESS.
1) Disconnect the connector (B301) from
ABSCM&H/U.
2) Disconnect the connector (i10) from the
combination meter.
3) Measure the resistance between
ABSCM&H/U connector and combination
meter connector.

Connector & terminal

(B301) No. 8 — (i10) No. 7:

Is the resistance less than 0.5
Ω?

Go to step 8.

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

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 ABSCM.
1) Connect the connector to the ABSCM&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. 7 — Chassis ground:

Is the resistance less than 0.5
Ω?

Check the combi-
nation meter.

Replace the
ABSCM only.
<Ref. to ABS-8,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>

ABS(diag)-38

ABS (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

11.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Content of diagnosis

Display

Reference target

C0101

ABS wheel speed sen-
sor malfunction (Bro-
ken wire, short)

Rear ABS wheel
speed sensor RH

Rear Right ABS Sen-
sor Circuit Open or
Shorted Battery

<Ref. to ABS(diag)-41, DTC C0101 ABS
WHEEL SPEED SENSOR MALFUNCTION
RR SENSOR (BROKEN WIRE, INPUT
VOLTAGE TOO HIGH), Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0102

Rear ABS wheel
speed sensor LH

Rear Left ABS Sensor
Circuit Open or
Shorted Battery

<Ref. to ABS(diag)-41, DTC C0102 ABS
WHEEL SPEED SENSOR MALFUNCTION
RL SENSOR (BROKEN WIRE, INPUT
VOLTAGE TOO HIGH), Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0103

Front ABS wheel
speed sensor RH

Front Right ABS Sen-
sor Circuit Open or
Shorted Battery

<Ref. to ABS(diag)-41, DTC C0103 ABS
WHEEL SPEED SENSOR MALFUNCTION
FR SENSOR (BROKEN WIRE, INPUT
VOLTAGE TOO HIGH), Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0104

Front ABS wheel
speed sensor LH

Front Left ABS Sensor
Circuit Open or
Shorted Battery

<Ref. to ABS(diag)-42, DTC C0104 ABS
WHEEL SPEED SENSOR MALFUNCTION
FL SENSOR (BROKEN WIRE, INPUT
VOLTAGE TOO HIGH), Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0105

ABS wheel speed sen-
sor malfunction (ABS
wheel speed sensor
abnormal signal)

Abnormal signal of
rear ABS wheel speed
sensor RH

Rear Right ABS Sen-
sor Signal

<Ref. to ABS(diag)-45, DTC C0105 REAR
ABS WHEEL SPEED SENSOR RH MAL-
FUNCTION (ABS WHEEL SPEED SEN-
SOR ABNORMAL SIGNAL), Diagnostic
Procedure with Diagnostic Trouble Code
(DTC).>

C0106

Abnormal signal of
rear ABS wheel speed
sensor LH

Rear Left ABS Sensor
Signal

<Ref. to ABS(diag)-45, DTC C0106 REAR
ABS WHEEL SPEED SENSOR LH MAL-
FUNCTION (ABS WHEEL SPEED SEN-
SOR ABNORMAL SIGNAL), Diagnostic
Procedure with Diagnostic Trouble Code
(DTC).>

C0107

Abnormal signal of
front ABS wheel speed
sensor RH

Front Right ABS Sen-
sor Signal

<Ref. to ABS(diag)-45, DTC C0107 FRONT
ABS WHEEL SPEED SENSOR RH MAL-
FUNCTION (ABS WHEEL SPEED SEN-
SOR ABNORMAL SIGNAL), Diagnostic
Procedure with Diagnostic Trouble Code
(DTC).>

C0108

Abnormal signal of
front ABS wheel speed
sensor LH

Front Left ABS Sensor
Signal

<Ref. to ABS(diag)-46, DTC C0108 FRONT
ABS WHEEL SPEED SENSOR LH MAL-
FUNCTION (ABS WHEEL SPEED SEN-
SOR ABNORMAL SIGNAL), Diagnostic
Procedure with Diagnostic Trouble Code
(DTC).>

C0109

Power voltage malfunction

Power Supply Voltage
Failure

<Ref. to ABS(diag)-60, DTC C0109 POWER
VOLTAGE MALFUNCTION, Diagnostic Pro-
cedure with Diagnostic Trouble Code
(DTC).>

C0110

ABS control module malfunction

ECM

<Ref. to ABS(diag)-59, DTC C0110 ABS
CONTROL MODULE MALFUNCTION,
Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

ABS(diag)-39

ABS (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

C0111

Motor/motor relay on failure

Motor and Motor Relay

<Ref. to ABS(diag)-66, DTC C0111
MOTOR/MOTOR RELAY MALFUNCTION,
Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

C0114

Valve relay on failure

Valve Relay

<Ref. to ABS(diag)-64, DTC C0114 VALVE
RELAY MALFUNCTION, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0115

ABS wheel speed sen-
sor malfunction (ABS
wheel speed sensor
abnormal signal)

Abnormal ABS wheel
speed sensor on any
one of four sensors

Any One of Four ABS
Sensors Signal

<Ref. to ABS(diag)-49, DTC C0115 ABS
WHEEL SPEED SENSOR SIGNAL MAL-
FUNCTION IN ONE OF FOUR WHEELS,
Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

C0116

Stop light switch signal circuit malfunction

Brake Light Switch

<Ref. to ABS(diag)-68, DTC C0116 FAULTY
STOP LIGHT SWITCH, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

C0118

Faulty G sensor output voltage

G Sensor Failure

<Ref. to ABS(diag)-70, DTC C0118 G SEN-
SOR OUTPUT VOLTAGE MALFUNCTION,
Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

C0119

Abnormal G sensor output voltage

G Sensor Signal

<Ref. to ABS(diag)-73, DTC C0119 G SEN-
SOR OUTPUT VOLTAGE MALFUNCTION,
Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>

C0120

Inlet valve malfunction
in hydraulic unit

Front inlet valve LH

FL Hold Valve mal-
function

<Ref. to ABS(diag)-53, DTC C0120 FRONT
INLET SOLENOID VALVE LH MALFUNC-
TION IN ABS CONTROL MODULE AND
HYDRAULIC CONTROL UNIT (ABSCM&H/
U), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0121

Outlet valve malfunc-
tion in hydraulic unit

Front outlet valve LH

FL Pressure Reducing
Valve malfunction

<Ref. to ABS(diag)-56, DTC C0121 FRONT
OUTLET SOLENOID VALVE LH MALFUNC-
TION IN ABS CONTROL MODULE AND
HYDRAULIC CONTROL UNIT (ABSCM&H/
U), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0122

Inlet valve malfunction
in hydraulic unit

Front inlet valve RH

FR Hold Valve mal-
function

<Ref. to ABS(diag)-53, DTC C0122 FRONT
INLET SOLENOID VALVE RH MALFUNC-
TION IN ABS CONTROL MODULE AND
HYDRAULIC CONTROL UNIT (ABSCM&H/
U), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0123

Outlet valve malfunc-
tion in hydraulic unit

Front outlet valve RH

FR Pressure Reducing
Valve malfunction

<Ref. to ABS(diag)-56, DTC C0123 FRONT
OUTLET SOLENOID VALVE RH MAL-
FUNCTION IN ABS CONTROL MODULE
AND HYDRAULIC CONTROL UNIT
(ABSCM&H/U), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

C0124

Inlet valve malfunction
in hydraulic unit

Rear inlet valve LH

RL Hold Valve mal-
function

<Ref. to ABS(diag)-53, DTC C0124 REAR
INLET SOLENOID VALVE LH MALFUNC-
TION IN ABS CONTROL MODULE AND
HYDRAULIC CONTROL UNIT (ABSCM&H/
U), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0125

Outlet valve malfunc-
tion in hydraulic unit

Rear outlet valve LH

RL Pressure Reduc-
ing Valve malfunction

<Ref. to ABS(diag)-56, DTC C0125 REAR
OUTLET SOLENOID VALVE LH MALFUNC-
TION IN ABS CONTROL MODULE AND
HYDRAULIC CONTROL UNIT (ABSCM&H/
U), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

DTC

Content of diagnosis

Display

Reference target

ABS(diag)-40

ABS (DIAGNOSTICS)

List of Diagnostic Trouble Code (DTC)

C0126

Inlet valve malfunction
in hydraulic unit

Rear inlet valve RH

RR Hold Valve mal-
function

<Ref. to ABS(diag)-53, DTC C0126 REAR
INLET SOLENOID VALVE RH MALFUNC-
TION IN ABS CONTROL MODULE AND
HYDRAULIC CONTROL UNIT (ABSCM&H/
U), Diagnostic Procedure with Diagnostic
Trouble Code (DTC).>

C0127

Outlet valve malfunc-
tion in hydraulic unit

Rear outlet valve RH

RR Pressure Reduc-
ing Valve malfunction

<Ref. to ABS(diag)-56, DTC C0127 REAR
OUTLET SOLENOID VALVE RH MAL-
FUNCTION IN ABS CONTROL MODULE
AND HYDRAULIC CONTROL UNIT
(ABSCM&H/U), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>

C0140

CAN communication malfunction

Improper CAN com-
munication

<Ref. to ABS(diag)-63, DTC C0140 CAN
COMMUNICATION MALFUNCTION, Diag-
nostic Procedure with Diagnostic Trouble
Code (DTC).>

DTC

Content of diagnosis

Display

Reference target