SUBARU Impreza 2004 vehicle Service manual

2004 IMPREZA SERVICE MANUAL

CHASSIS SECTION

QUICK REFERENCE INDEX

This service manual has been prepared to provide SUBARU service personnel with the necessary information and data for the correct maintenance and repair of SUBARU vehicles.

This manual includes the procedures for maintenance, disassembling, reassembling, inspection and adjustment of components and diagnostics for guidance of experienced mechanics.

Please peruse and utilize this manual fully to ensure complete repair work for satisfying our customers by keeping their vehicle in optimum condition.

When replacement of parts during repair work is needed, be sure to use

SUBARU genuine parts.

FRONT SUSPENSION

REAR SUSPENSION

WHEEL AND TIRE SYSTEM

DIFFERENTIALS

TRANSFER CASE

DRIVE SHAFT SYSTEM

ABS

ABS (DIAGNOSTICS)

BRAKE

PARKING BRAKE

POWER ASSISTED SYSTEM

(POWER STEERING)

BR

PB

PS

FS

RS

WT

DI

TC

DS

ABS

ABS(diag)

All information, illustration and specifications contained in this manual are based on the latest product information available at the time of publication approval.

FUJI HEAVY INDUSTRIES LTD.

G1870GE5

ABS (DIAGNOSTICS)

ABS(diag)

Page

1.

Basic Diagnostic Procedure ........................................................................2

2.

Check List for Interview...............................................................................4

3.

General Description ....................................................................................8

4.

Electrical Components Location................................................................10

5.

Control Module I/O Signal .........................................................................12

6.

Subaru Select Monitor...............................................................................16

7.

Read Diagnostic Trouble Code (DTC) ......................................................19

8.

Inspection Mode........................................................................................20

9.

Clear Memory Mode..................................................................................21

10.

ABS Warning Light/Brake Warning Light Illumination Pattern ..................22

11.

List of Diagnostic Trouble Code (DTC) .....................................................23

12.

Diagnostics Procedure without Diagnostic Trouble Code (DTC) ..............26

13.

Diagnostics Procedure with Diagnostic Trouble Code (DTC) ...................37

14.

General Diagnostics Table......................................................................127

Basic Diagnostic Procedure

ABS (DIAGNOSTICS)

1. Basic Diagnostic Procedure

A: PROCEDURE

CAUTION:

Remove foreign matter (dust, water, etc.) from the ABSCM&H/U connector during removal and installation.

NOTE:

• To check the harness for broken wires or short circuits, shake it while holding it or the connector.

• Check list for interview. <Ref. to ABS(diag)-4, Check List for Interview.>

1

2

3

Step Check

CHECK PRE-INSPECTION.

1)Ask the customer when and how trouble

occurred using interview checklist. <Ref. to

ABS(diag)-4, Check List for Interview.>

2)Before performing diagnosis, inspect the unit

which might influence the ABS problem. <Ref. to ABS(diag)-8, INSPECTION, General

Description.>

Is the unit that might influence the ABS problem normal?

CHECK INDICATION OF DTC DISPLAY.

1)Turn the ignition switch to OFF.

2)Connect the SUBARU SELECT MONITOR to data link connector.

3)Turn the ignition switch to ON and SUBARU

SELECT MONITOR to ON.

Is the DTC displayed?

Yes

Go to step 2.

Go to step 4.

NOTE:

If the communication function of Subaru Select

Monitor cannot be executed normally, check

communication circuit. <Ref. to ABS(diag)-37,

COMMUNICATION FOR INITIALIZING IM-

POSSIBLE, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

4)Read the DTC. <Ref. to ABS(diag)-17,

READ CURRENT DATA, OPERATION, Subaru Select Monitor.>

5)Record all DTCs and freeze frame data.

PERFORM THE GENERAL DIAGNOSTICS.

1)Inspect using “General Diagnostics Table”.

<Ref. to ABS(diag)-127, General Diagnostics

Table.>

2)Perform the clear memory mode. <Ref. to

ABS(diag)-17, CLEAR MEMORY MODE,

OPERATION, Subaru Select Monitor.>

3)Perform the inspection mode. <Ref. to

ABS(diag)-20, Inspection Mode.>

4)Calling up the DTC. <Ref. to ABS(diag)-16,

READ DIAGNOSTIC TROUBLE CODE (DTC),


Check DTC is not displayed.

Is the ABS warning light turned off after ignition switch OFF?

Complete the diagnosis.

No

Repair or replace each unit.

Go to step 3.

Inspect using

“diagnostics procedure for No

DTC”. <Ref. to

ABS(diag)-40, NO

DTC.>

ABS(diag)-2

4

Basic Diagnostic Procedure

ABS (DIAGNOSTICS)

Step Check

PERFORM THE DIAGNOSIS.

1)For the DTC list, refer to “List of DTC”. <Ref. to ABS(diag)-23, WITH SUBARU SELECT

MONITOR, LIST, List of Diagnostic Trouble

Code (DTC).>

2)Repair trouble cause.

3)Perform the clear memory mode. <Ref. to

ABS(diag)-17, CLEAR MEMORY MODE,


4)Perform the inspection mode. <Ref. to

ABS(diag)-20, Inspection Mode.>

5)Calling up the DTC. <Ref. to ABS(diag)-16,

READ DIAGNOSTIC TROUBLE CODE (DTC),


Are the DTCs indicated on display?

Yes No

Inspect using

“diagnostics procedure with Subaru Select

Monitor”. <Ref. to

ABS(diag)-37,

Diagnostics Procedure with Diagnostic Trouble Code

(DTC).>

Complete the diagnosis.

ABS(diag)-3

Check List for Interview

ABS (DIAGNOSTICS)

2. Check List for Interview

A: CHECK

Check the following items about the vehicle’s state.

1. STATE OF ABS WARNING LIGHT

ABS warning light comes on.

❏ Always

❏ Sometimes

❏ Only once

❏ Does not come on

• When / how long does it come on?:

Ignition key position

❏ LOCK

❏ ACC

❏ ON (before starting engine)

❏ START

❏ On after starting (Engine is running)

❏ On after starting (Engine is stop)

Timing

❏ Immediately after ignition is ON.

❏ Immediately after ignition starts.

❏ When advancing

❏ While traveling at a constant speed

❏ When decelerating

❏When turning to right

❏ When turning to left

❏ When moving other electrical parts

• Parts name :

• Operating condition :

Steering angle :

Steering time :

Steering angle :

Steering time : km/h km/h to

MPH to km/h to

MPH to

km/h

MPH

MPH

km/h

MPH deg sec deg sec

ABS(diag)-4


2. STATE OF BRAKE WARNING LIGHT

Brake warning light comes on.

❏ Always

❏ Sometimes

❏ Only once

❏ Does not come on

❏ When parking brake lever is pulled

❏ When parking brake lever is released

• When / how long does it come on?:

Ignition key position

❏ LOCK

❏ ACC

❏ ON (before starting engine)

❏ START

❏ On after starting (Engine is running)

❏ On after starting (Engine is stop)

Timing

❏ Immediately after ignition is ON.

❏ Immediately after ignition starts.

❏ When advancing

❏ While traveling at a constant speed

❏ When decelerating

❏When turning to right

❏ When turning to left

❏ When operating other electrical parts

• Parts name :

• Operating condition :

Steering angle :

Steering time :

Steering angle :

Steering time : km/h

ABS (DIAGNOSTICS) km/h to

MPH to km/h to

MPH to

km/h

MPH

MPH

km/h

MPH deg sec deg sec

ABS(diag)-5


ABS (DIAGNOSTICS)

3. SYMPTOMS

ABS operating condition

❏ Does not operate.

❏ Operates only when abruptly applying brakes.

Vehicle speed :

Behavior of vehicle

• How to step on brake pedal : a) Operating time : b) Operating noise :

❏ Produce / ❏ Does not produce

• What kind of noise?

❏ Knock

❏ Gong gong

❏ Bong

❏ Buzz

❏ Gong gong buzz

❏ Others : c) Reaction force of brake pedal

❏ Stick

❏ Press down once with a clunk

❏ Press and released

❏ Others : a) Directional stability cannot be obtained or steering refuses to work when applying brakes :

❏ Yes / ❏ No

• When :

❏ Vehicle turns to right

❏ Vehicle turns to left

❏ Spins

❏ Others : b) Directional stability cannot be obtained or steering refuses to work when accelerating :

❏ Yes / ❏ No

• When :

❏ Vehicle turns to right

❏ Vehicle turns to left

❏ Spins

❏ Others : c) Brakes out of order :

❏ Yes / ❏ No

• What :

❏ Braking distance is long

❏ Brakes lock or drag

❏ Pedal stroke is long

❏ Pedal sticks

❏ Others : d) Poor acceleration :

❏ Yes / ❏ No

• What :

❏ Fails to accelerate

❏ Engine stalls

❏ Others : e) Occurrence of vibration :

❏ Yes / ❏ No

• Where

• What kind : f) Occurrence of abnormal noise :

❏ Yes / ❏ No

• Where

• What kind : g) Occurrence of other phenomena :

❏ Yes / ❏ No

• What kind : km/h

MPH sec

ABS(diag)-6


4. CONDITIONS UNDER WHICH TROUBLE OCCURS

Environment a) Weather

Condition b) Ambient temperature c) Road d) Road surface a) Brakes b) Accelerator c) Vehicle speed d) Tire inflation pressure e) Degree of wear

ABS (DIAGNOSTICS)

❏ Fine

❏ Cloudy

❏ Rainy

❏ Snowy

❏ Various/Others :

❏ Urban area

❏ Suburbs

❏ Highway

❏ General road

❏ Ascending slope

❏ Descending slope

❏ Paved road

❏ Gravel road

❏ Muddy road

❏ Sandy place

❏ Others :

❏ Dry

❏ Wet

❏ New-fallen snow

❏ Compressed snow

❏ Frozen slope

❏ Others :

Deceleration :

❏ Continuous / ❏ Intermittent

Acceleration :

❏ Continuous / ❏ Intermittent km/h

❏ Advancing

❏ Accelerating

❏ Reducing speed

❏ Low speed

❏ Turning

❏ Others :

Front RH tire :

Front LH tire :

Rear RH tire :

Rear LH tire :

Front RH tire :

Front LH tire :

Rear RH tire :

Rear LH tire :

°C (°F) g g

MPH kPa kPa kPa kPa f) Genuine parts are used. :

❏ Yes / ❏ No g) Chain is passed around tires. :

❏ Yes / ❏ No h) T tire is used. :

❏ Yes / ❏ No i) Condition of suspension alignment : j) Loading state : k) Repair parts are used. :

❏ Yes / ❏ No

• What : l) Others :

ABS(diag)-7

General Description

ABS (DIAGNOSTICS)

3. General Description

A: CAUTION

1. SUPPLEMENTAL RESTRAINT SYSTEM

“AIRBAG”

Airbag system wiring harness is routed near the

ABS wheel speed sensor, ABS control module and hydraulic control unit.

CAUTION:

• All airbag system wiring harness and connectors are colored yellow. Do not use electrical test equipment on these circuit.

• Be careful not to damage the airbag system wiring harness when servicing the ABS wheel speed sensor, ABS control module and hydraulic control unit.

B: INSPECTION

Before performing diagnostics, check the following items which might affect ABS problems:

1. BATTERY

Measure the battery voltage and specific gravity of electrolyte.

Standard voltage: 12 V, or more

Specific gravity: Above 1.260

2. BRAKE FLUID

1) Check the brake fluid level.

2) Check the brake fluid leakage.

3. HYDRAULIC UNIT

Check the hydraulic unit.

• With brake tester <Ref. to ABS-8, CHECKING

THE HYDRAULIC UNIT ABS OPERATION WITH

BRAKE TESTER, INSPECTION, ABS Control

Module and Hydraulic Control Unit (ABSCM&H/

U).>

• Without brake tester <Ref. to ABS-7, CHECK-

ING THE HYDRAULIC UNIT ABS OPERATION

BY PRESSURE GAUGE, INSPECTION, ABS

Control Module and Hydraulic Control Unit (AB-

SCM&H/U).>

4. BRAKE DRAG

Check for brake drag.

5. BRAKE PAD AND ROTOR

Check the brake pad and rotor.

• Front <Ref. to BR-27, INSPECTION, Front Brake

Pad.> and <Ref. to BR-29, INSPECTION, Front

Disc Rotor.>

• Rear <Ref. to BR-38, INSPECTION, Rear Brake

Pad.> and <Ref. to BR-40, INSPECTION, Rear

Disc Rotor.> or <Ref. to BR-48, INSPECTION,

Rear Drum Brake Shoe.> and <Ref. to BR-49, IN-

SPECTION, Rear Drum Brake Drum.>

6. TIRE

Check the tire specifications, tire wear and air pressure. <Ref. to WT-2, SPECIFICATIONS, General

Description.>

ABS(diag)-8

General Description

ABS (DIAGNOSTICS)

C: PREPARATION TOOL

1. SPECIAL TOOLS

ILLUSTRATION TOOL NUMBER

24082AA230

DESCRIPTION

CARTRIDGE

REMARKS

Troubleshooting for electrical systems.

ST24082AA230

22771AA030 SUBARU SELECT

MONITOR KIT

Troubleshooting for electrical systems.

ST22771AA030

2. GENERAL PURPOSE TOOLS

TOOL NAME

Circuit tester

Oscilloscope

REMARKS

Used for measuring resistance, voltage and amperage.

Used for measuring sensor.

ABS(diag)-9

Electrical Components Location

ABS (DIAGNOSTICS)

4. Electrical Components Location

A: LOCATION

(2)

(3)

(5)

(6)

(13)

(4)

(7)

(9)

(1)

(7)

(9)

(8)

(12)

(11)

(10)

(14)

(8)

(8)

(7)

(9)

(9)

(7)

(8)

(1) ABS control module and hydraulic control unit (ABSCM&H/U)

(2) Connector

(3) Diagnosis connector

(4) ABS warning light

(5) Data link connector (for Subaru

Select Monitor)

(6) Transmission control module

(TCM) (AT model)

(7) Tone wheel

(8) ABS wheel speed sensor

(9) Wheel cylinder

(10) G sensor

(11) Stop light switch

ABS00329

(12) Master cylinder

(13) Brake & EBD warning light

(14) Lateral G sensor (STi model)

ABS(diag)-10

(1)

Electrical Components Location

ABS (DIAGNOSTICS)

(13)

ABS00101

(10)

(3)

ABS00337

ABS00102

(5)

REAR

(7)

(8)

ABS00344

ABS00104

FRONT

(7)

ABS00106

(8)

ABS00107

(14)

ABS00345

ABS(diag)-11

Control Module I/O Signal

ABS (DIAGNOSTICS)

5. Control Module I/O Signal

A: ELECTRICAL SPECIFICATION

(1)

(2)

B301 or F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00182

(1) ABS control module and hydraulic control unit (ABSCM&H/U) connector

(2) Connector switch

NOTE:

• The terminal numbers in ABS control module and hydraulic control unit connector are as shown in the figure.

• When the connector is removed from ABSCM&H/U, the connector switch closes the circuit between terminal No. 22 and No. 23. The ABS warning light illuminates.

ABS(diag)-12


ABS (DIAGNOSTICS)

Contents

ABS wheel speed sensor*2

(Wheel speed sensor)

Front left wheel

Front right wheel

Rear left wheel

Rear right wheel

Valve relay power supply*1

Motor relay power supply*1

Power supply

G sensor*2 Ground

Lateral G sensor

(STi model)

Stop light switch*1

ABS warning light*2

Brake warning light*2

(EBD warning light)

AT ABS signal

(AT models only)

ABS operation signal monitor

Subaru Select Monitor*2

ABS diagnosis connector

Power supply*1

Grounding line

Grounding line

Output

Power supply

Ground

Output

Data is received.

Data is sent.

Terminal No. 3

Terminal No. 6

Terminal No.

(+) — (

−)

9 — 10

11 — 12

7 — 8

14 — 15

24 — 23

25 — 23

30 — 28

28

6 — 28

30 — 28

28

29 — 28

2 — 23

22 — 23

21 — 23

31 — 23

3 — 23

20 — 23

5 — 23

29 — 23

4 — 23

1 — 23

23

26

Input/Output signal

Measured value and measuring conditions

0.12 — 1 V

(When it is 20 Hz.)

10 — 15 V

10 — 15 V

4.75 — 5.25 V

—

2.1 — 2.5 V when vehicle is in horizontal position.

4.75 — 5.25 V

—

2.3 — 2.7 V when vehicle is in horizontal position.

Less than 1.5 V when the stop light is OFF and, 10 — 15 V when the stop light is ON.

Less than 1.5 V within 1.5 seconds immediately after ignition switch has been turned to ON, and 10 — 15 V after 1.5 seconds has elapsed.

Less than 1.5 V within 1.5 seconds immediately after ignition switch has been turned to ON, and 10 — 15 V after 1.5 seconds has elapsed.

Less than 1.5 V when the ABS control still operates and more than 5.5 V when ABS does not operate.

Less than 1.5 V when the ABS control still operates and more than 5.5 V when ABS does not operate.

Less than 1.5 V when no data is received.

4.75 — 5.25 V when no data is sent.

10 — 15 V when ignition switch is ON.



—

—

*1: Measure the I/O signal voltage after removing the connector from the ABSCM&H/U terminal.

*2: Measure the I/O signal voltage at connector (F2).

ABS(diag)-13

ABS (DIAGNOSTICS)

B: WIRING DIAGRAM


(3)

(1)

(16)

(17)

(18)

(5)

(2)

(19)

(20)

(6)

(4)

(21)

M

(7)

(22)

(23)

(28)

(24)

(25)

(26)

(27)

(1) Battery

(2) IGN

(3) ABS control module and hydraulic control unit (ABSCM&H/U)

(4) ABS control module area

(5) Valve relay

(6) Motor relay

(7) Motor

(8) Front inlet solenoid valve LH

(9) Front outlet solenoid valve LH

(10) Front inlet solenoid valve RH

(11) Front outlet solenoid valve RH

(12) Rear inlet solenoid valve LH

(13) Rear outlet solenoid valve LH

(14) Rear inlet solenoid valve RH

(15) Rear outlet solenoid valve RH

(16) Transmission control module

(TCM) (AT model)

(17) Diagnosis connector

(18) Data link connector

(19) Brake warning light


(21) Stop light switch

(22) Stop light

(8)

(9)

(10)

(11)

(12)

(13)

(14)

(15)

ABS00375

(23) G sensor

(24) Front ABS wheel speed sensor LH

(25) Front ABS wheel speed sensor

RH

(26) Rear ABS wheel speed sensor LH

(27) Rear ABS wheel speed sensor

RH

(28) Lateral G sensor (STi model)

ABS(diag)-14


C: WAVEFORM

(1)

[V]

(2)

9 10

11 12

7 8

14 15

0

20 Hz

(3) 20 Hz : 0.12

1V

ABS00034

(1) ABS wheel speed sensor

(2) Terminal No.

(3) Standard output voltage

ABS (DIAGNOSTICS)

ABS(diag)-15

Subaru Select Monitor

ABS (DIAGNOSTICS)

6. Subaru Select Monitor

A: OPERATION

1. READ DIAGNOSTIC TROUBLE CODE

(DTC)

1) Prepare the Subaru Select Monitor kit.

CAUTION:

Do not connect the scan tools except for Subaru Select Monitor and OBD-II general scan tool.

5) Turn the ignition switch to ON (engine OFF) and

Subaru Select Monitor switch to ON.

(1)

ABS00111

2) Connect the diagnosis cable to Subaru Select

Monitor.

3) Insert the cartridge into Subaru Select Monitor.

<Ref. to ABS(diag)-9, SPECIAL TOOLS, PREPA-

RATION TOOL, General Description.>

ABS00112

4) Connect the Subaru Select Monitor to data link connector.

(1) Data link connector located in the lower portion of instrument panel (on the driver’s side).

(1)

ABS00346

(1) Data link connector

(2) Connect the diagnosis cable to data link connector.

ABS00114

6) On the «Main Menu» display screen, select the

{Each System Check} and press [YES] key.

7) On the «System Selection Menu» display screen, select the {Brake Control System} and press [YES] key.

8) Press the [YES] key after the information of ABS type is displayed.

9) On the «ABS Diagnosis» display screen, select the {DTC Display} and press [YES] key.

10) On the «DTC Display» display screen, select the {Current DTC} or {History DTC} and press

[YES] key.

NOTE:

• For detailed operation procedure, refer to the

SUBARU SELECT MONITOR OPERATION MAN-

UAL.

• For detailed concerning the DTC, refer to the

LIST OF DTC. <Ref. to ABS(diag)-23, List of Diagnostic Trouble Code (DTC).>

• A maximum of 3 DTCs are displayed in order of occurrence.

• If a particular DTC is not properly stored in memory (due to a drop in ABSCM&H/U power supply, etc.) when a problem occurs, the DTC, followed by a question mark “?”, appears on the Subaru Select

Monitor display. This shows it may be an unreliable reading.

Display screen

Current

Old

Older

(1) Power switch

Before 3

Contents to be monitored

The most recent DTC appears on Subaru Select Monitor display.

The second most recent DTC appears on Subaru Select Monitor display.

The third most recent DTC appears on

Subaru Select Monitor display.

DTC issued after elapse of a specified period of time.

ABS(diag)-16


ABS (DIAGNOSTICS)

2. READ CURRENT DATA

1) On the «Main Menu» display screen, select the {Each System Check} and press «YES» key.

2) On the «System Selection Menu» display screen, select the {Brake Control System} and press «YES» key.

3) Press the «YES» key after the information of ABS type is displayed.

4) On the «Brake Control Diagnosis» display screen, select the {Current Data Display & Save} and press

«YES» key.

5) On the «Data Display Menu» display screen, select the {Data Display} and press «YES» key.

6) Using the scroll key, move the display screen up or down until desired data is shown.

• A list of the support data is shown in the following table.

Unit of measure Display screen

FR Wheel Speed

FL Wheel Speed

RR Wheel Speed

RL Wheel Speed

Stop Light Switch

Stop Light Switch

G Sensor Output Signal

Lateral G Sensor Output Signal

Valve Relay Signal

Motor Relay Signal

ABS Signal to TCM

ABS Warning Lamp

EBD Warning Light

Motor Relay Monitor

Valve Relay Monitor

CCM Signal


Wheel speed detected by Front ABS wheel speed sensor RH is displayed

Wheel speed detected by Front ABS wheel speed sensor LH is displayed

Wheel speed detected by Rear ABS wheel speed sensor RH is displayed

Wheel speed detected by Rear ABS wheel speed sensor LH is displayed

Stop light switch signal

Stop light switch monitor voltage is displayed.

Voltage equivalent to vehicle acceleration detected by analog G sensor is displayed.

Lateral G detected by Lateral G sensor is displayed in voltage. (STi model)

Valve Relay Signal

Motor Relay Signal

ABS operation signal from ABS control module to TCM

ON operation of ABS warning light is displayed.

ON operation of EBD warning light is displayed.

Operating condition of motor relay is displayed.

Operating condition of the valve relay is displayed.

ABS operation signal from ABS control module to TCM km/h or MPH km/h or MPH km/h or MPH km/h or MPH

ON or OFF

V

V

V

ON or OFF

ON or OFF

ON or OFF

ON or OFF

ON or OFF

ON or OFF

ON or OFF

ON or OFF

NOTE:

For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL.

3. CLEAR MEMORY MODE

1) On the «Main Menu» display screen, select the

{2. Each System Check} and press «YES» key.

2) On the «System Select Menu» display screen, select the {Brake System} and press «YES» key.

3) Press the «YES» key after the information of engine type is displayed.

4) On the «Brake Control Diagnosis» display screen, select the {Clear Memory} and press

«YES» key.

NOTE:

For detailed operation procedure, refer to the SUB-

ARU SELECT MONITOR OPERATION MANUAL.

4. ABS SEQUENCE CONTROL

Display screen

ABS sequence control


Perform ABS sequence control by operating valve and pump motor sequentially.

Index No.

<Ref. to ABS-

10, ABS

Sequence Control.>

Display screen Contents to be monitored

Clear memory?

Function of clearing DTC.

5) When the “Done” and “turn ignition switch to

OFF” are shown on display screen, turn the Subaru

Select Monitor and ignition switch to OFF.

ABS(diag)-17


ABS (DIAGNOSTICS)

5. FREEZE FRAME DATA

NOTE:

• Data stored at the time of trouble occurrence is shown on display.

• Each time trouble occurs, the latest information is stored in the freeze frame data in memory.

• Freeze frame data will be memorized maximum to three.

• If freeze frame data is not properly stored in memory (due to a drop in ABSCM power supply, etc.), a DTC, preceded by a question mark “?”, appears on the Subaru Select Monitor display. This shows it may be an unreliable reading.

Display screen

FR wheel speed

FL wheel speed

RR wheel speed

RL wheel speed

ABSCM power voltage

G sensor output voltage


Wheel speed detected by Front ABS wheel speed sensor RH is displayed in km/h or mile/h.

Wheel speed detected by Front ABS wheel speed sensor LH is displayed in km/h or mile/h.

Wheel speed detected by Rear ABS wheel speed sensor RH is displayed in km/h or mile/h.

Wheel speed detected by Rear ABS wheel speed sensor LH is displayed in km/h or mile/h.

Power (in volts) supplied to ABSCM&

H/U appears on the Subaru Select Monitor display.

Voltage equivalent to vehicle acceleration detected by analog G sensor is displayed.

Lateral G sensor output voltage

Motor relay monitor

Stop light switch Stop light switch signal

ABS signal to

TCM


ABS-AT control


ABS operation signal

Condition of malfunction

Voltage equivalent to Lateral G detected by analog Lateral G sensor is displayed.

Motor relay operation monitor signal

ABS operation signal

Displays if the malfunction has occurred to ABS only, or to ABS and EBD.

Display screen

RR wheel speed

RL wheel speed

Stop light switch

G sensor output voltage


Wheel speed detected by Rear ABS wheel speed sensor RH is displayed in km/h or mile/h.

Wheel speed detected by Rear ABS wheel speed sensor LH is displayed in km/h or mile/h.

Stop light switch monitor voltage is displayed.

Refers to vehicle acceleration detecting by analog G sensor. It appears on the

Subaru Select Monitor display in volts.

Lateral G sensor output voltage

Voltage equivalent to Lateral G detected by analog Lateral G sensor is displayed.

7. ON/OFF DATA ARE DISPLAYED

Display screen

Stop light switch

Valve relay signal

Motor relay signal


Stop light switch signal

Valve relay signal

Motor relay signal

ABS signal to TCM


ABS warning light ABS warning light

Valve relay monitor Valve relay operation monitor signal

Motor relay monitor Motor relay operation monitor signal

CCM signal


6. ANALOG DATA ARE DISPLAYED

Display screen

FR wheel speed

FL wheel speed


Wheel speed detected by Front ABS wheel speed sensor RH is displayed in km/h or mile/h.

Wheel speed detected by Front ABS wheel speed sensor LH is displayed in km/h or mile/h.

ABS(diag)-18

Read Diagnostic Trouble Code (DTC)

7. Read Diagnostic Trouble

Code (DTC)

A: OPERATION

Refer to SUBARU SELECT MONITOR for information about how to obtain and understand DTCs.

<Ref. to ABS(diag)-16, Subaru Select Monitor.>

ABS (DIAGNOSTICS)

ABS(diag)-19

Inspection Mode

ABS (DIAGNOSTICS)

8. Inspection Mode

A: OPERATION

Reproduce the condition under which the problem has occurred as much as possible.

Drive the vehicle at a speed more than 40 km/h (25

MPH) for at least 1 minute.

ABS(diag)-20

Clear Memory Mode

9. Clear Memory Mode

A: OPERATION

Refer to SUBARU SELECT MONITOR for informa-

tion about how to clear DTC. <Ref. to ABS(diag)-

16, Subaru Select Monitor.>

ABS (DIAGNOSTICS)

ABS(diag)-21

ABS Warning Light/Brake Warning Light Illumination Pattern

ABS (DIAGNOSTICS)

10.ABS Warning Light/Brake Warning Light Illumination Pattern

A: INSPECTION

(1)

IG SW

OFF

(3)

(2)

ON

(4)

(5)

(3)

ON

(6)

(7)

(3) (3)

(8)

ABS00341

(1) START


(3) Goes out

(4) Illuminates

(5) 1.5 sec.

(6) Brake warning light

(7) Parking brake

(8) Release

1) When the ABS warning light does not illuminate in accordance with this illumination pattern, there must be an electrical malfunction.

2) When the ABS warning light remains constantly OFF, repair the ABS warning light circuit or diagnosis cir-

cuit. <Ref. to ABS(diag)-26, Diagnostics Procedure without Diagnostic Trouble Code (DTC).>

NOTE:

Even though the ABS warning light does not go out 1.5 seconds after it illuminates, the ABS system operates normally when the warning light goes out while driving at approx. 12 km/h (7 MPH). However, the Anti-lock brakes do not work while ABS warning light is illuminated.

ABS(diag)-22

List of Diagnostic Trouble Code (DTC)

ABS (DIAGNOSTICS)

11.List of Diagnostic Trouble Code (DTC)

A: LIST

1. WITHOUT SUBARU SELECT MONITOR

DTC

—

—

—

Contents of diagnosis

ABS warning light does not illuminate.

ABS warning light remains on.

Brake warning light remains on.

Index No.

<Ref. to ABS(diag)-26, ABS WARNING LIGHT DOES NOT COME

ON, Diagnostics Procedure without Diagnostic Trouble Code

(DTC).>

<Ref. to ABS(diag)-30, ABS WARNING LIGHT DOES NOT GO

OFF, Diagnostics Procedure without Diagnostic Trouble Code

(DTC).>

<Ref. to ABS(diag)-34, BRAKE WARNING LIGHT DO NOT GO

OFF, Diagnostics Procedure without Diagnostic Trouble Code

(DTC).>

2. WITH SUBARU SELECT MONITOR

DTC Sub code No.

—

—

21

22

23

24

25

26

27

28

4A02

—

—

48C5, 4945

48E5, 4845

4905, 4885

4202

40C5, 4145

40E5, 4045

4105, 4085

4602

44C5, 4545

44E5, 4445

4505, 4485

4E02

4CC5, 4D45

4CE5, 4C45

4D05, 4C85

Display screen

Communication for initializing impossible

No DTC

Open or short circuit in Front ABS wheel speed sensor RH circuit

Front ABS wheel speed sensor RH abnormal signal

Open or short circuit in Front ABS wheel speed sensor LH circuit

Front ABS wheel speed sensor LH abnormal signal

Open or short circuit in Rear ABS wheel speed sensor RH circuit

Rear ABS wheel speed sensor RH abnormal signal

Open or short circuit in Rear ABS wheel speed sensor LH circuit

Rear ABS wheel speed sensor LH abnormal signal


Subaru Select Monitor communication failure

Although no DTC appears on the Subaru Select Monitor display, the ABS warning light remains on.

Open or short circuit in Front ABS wheel speed sensor RH circuit

Front ABS wheel speed sensor RH abnormal signal

Open or short circuit in Front ABS wheel speed sensor LH circuit

Front ABS wheel speed sensor LH abnormal signal

Open or short circuit in Rear ABS wheel speed sensor RH circuit

Rear ABS wheel speed sensor RH abnormal signal

Open or short circuit in Rear ABS wheel speed sensor LH circuit

Rear ABS wheel speed sensor LH abnormal signal

Index No.

<Ref. to ABS(diag)-37, COMMUNICATION FOR INI-

TIALIZING IMPOSSIBLE, Diagnostics Procedure with

Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-40, NO DTC, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-43, DTC 21 OPEN OR SHORT CIR-

CUIT IN FRONT RIGHT ABS WHEEL SPEED SENSOR

CIRCUIT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-51, DTC 22 FRONT RIGHT ABNOR-

MAL ABS WHEEL SPEED SENSOR SIGNAL, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>


CUIT IN FRONT LEFT ABS WHEEL SPEED SENSOR


<Ref. to ABS(diag)-51, DTC 24 FRONT LEFT ABNOR-



CUIT IN REAR RIGHT ABS WHEEL SPEED SENSOR


<Ref. to ABS(diag)-51, DTC 26 REAR RIGHT ABNOR-



CUIT IN REAR LEFT ABS WHEEL SPEED SENSOR


<Ref. to ABS(diag)-52, DTC 28 REAR LEFT ABNOR-


ABS(diag)-23


ABS (DIAGNOSTICS)

DTC Sub code No.

29

31

32

33

34

35

36

37

38

5080

50C0

3200

3600

2200

2600

2A00

2E00

3A00

3E00

Display screen

Abnormal ABS wheel speed sensor signal on any one of four sensor

Front inlet valve RH malfunction


Abnormal ABS wheel speed sensor signal on any one of four

Front outlet valve RH malfunction

Front outlet valve RH malfunction

Front inlet valve LH malfunction

Front outlet valve LH malfunction

Rear inlet valve RH malfunction

Rear outlet valve RH malfunction

Rear inlet valve LH malfunction

Rear outlet valve LH malfunction

Front inlet valve RH malfunction

Front inlet valve LH malfunction

Front outlet valve LH malfunction

Rear inlet valve RH malfunction

Rear outlet valve RH malfunction

Rear inlet valve LH malfunction

Rear outlet valve LH malfunction

Index No.

<Ref. to ABS(diag)-58, DTC 29 ABNORMAL ABS

WHEEL SPEED SENSOR SIGNAL ON ANY ONE OF

FOUR SENSOR, Diagnostics Procedure with Diagnostic

Trouble Code (DTC).>

<Ref. to ABS(diag)-62, DTC 31 FRONT RIGHT INLET

VALVE MALFUNCTION, Diagnostics Procedure with


<Ref. to ABS(diag)-65, DTC 32 FRONT RIGHT OUTLET



<Ref. to ABS(diag)-62, DTC 33 FRONT LEFT INLET



<Ref. to ABS(diag)-65, DTC 34 FRONT LEFT OUTLET



<Ref. to ABS(diag)-62, DTC 35 REAR RIGHT INLET



<Ref. to ABS(diag)-65, DTC 36 REAR RIGHT OUTLET



<Ref. to ABS(diag)-63, DTC 37 REAR LEFT INLET



<Ref. to ABS(diag)-66, DTC 38 REAR LEFT OUTLET



41

02A0, 0040,

0020, 02C0,

00E0, 0340,

0140, 0160,

0280, 0460,

0260, 0060,

0080, 0300

ABS control module malfunction

ABS control module and hydraulic control unit malfunction

<Ref. to ABS(diag)-69, DTC 41 ABS CONTROL MOD-

ULE MALFUNCTION, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

42

44

51

5A00

5A80

1600

1500

0C80

0EA0

0C40

Power supply voltage too low

Power supply voltage too high

ABS-AT control (Non

Controlled)

ABS-AT control

(Controlled)

Valve relay malfunction

Power supply voltage too low

Power supply voltage too high

ABS-AT control (Non

Controlled)

ABS-AT control (Controlled)

Valve relay malfunction

Valve relay ON failure Valve relay ON failure

<Ref. to ABS(diag)-71, DTC 42 POWER SUPPLY

VOLTAGE TOO LOW, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-74, DTC 42 POWER SUPPLY

VOLTAGE TOO HIGH, Diagnostics Procedure with


<Ref. to ABS(diag)-77, DTC 44 ABS-AT CONTROL

(NON CONTROLLED), Diagnostics Procedure with


<Ref. to ABS(diag)-79, DTC 44 ABS-AT CONTROL

(CONTROLLED), Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-81, DTC 51 VALVE RELAY MAL-

FUNCTION, Diagnostics Procedure with Diagnostic


<Ref. to ABS(diag)-83, DTC 51 VALVE RELAY ON

FAILURE, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

ABS(diag)-24


ABS (DIAGNOSTICS)

DTC Sub code No.

52

54

56

73

10A1

10E1

10C1

5600

7600

7580

7540

7500

7A00

7980

7940

7900

Open circuit in motor relay circuit

Motor relay ON failure

Display screen

Motor malfunction

Stop light switch signal circuit malfunction

Open or short circuit in G sensor circuit

Battery short in G sensor circuit

Abnormal G sensor high

µ output

Detection of G sensor stick

Open or short circuit in Lateral G sensor circuit

Battery short in Lateral G sensor circuit

Abnormal Lateral G sensor high

µ output

Detection of Lateral

G sensor stick


Open circuit in motor relay circuit

Motor relay ON failure

Motor malfunction

Stop light switch signal circuit malfunction

Open or short circuit in G sensor circuit

Battery short in G sensor circuit

Abnormal G sensor high

µ output

Detection of G sensor stick

Open or short circuit in Lateral G sensor circuit

Battery short in Lateral G sensor circuit

Abnormal Lateral G sensor high

µ output

Detection of Lateral

G sensor stick

Index No.

<Ref. to ABS(diag)-85, DTC 52 OPEN CIRCUIT IN

MOTOR RELAY CIRCUIT, Diagnostics Procedure with


<Ref. to ABS(diag)-87, DTC 52 MOTOR RELAY ON

FAILURE, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-89, DTC 52 MOTOR MALFUNC-

TION, Diagnostics Procedure with Diagnostic Trouble

Code (DTC).>

<Ref. to ABS(diag)-91, DTC 54 STOP LIGHT SWITCH

SIGNAL CIRCUIT MALFUNCTION, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>


CUIT IN G SENSOR CIRCUIT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-97, DTC 56 BATTERY SHORT IN G

SENSOR CIRCUIT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-102, DTC 56 ABNORMAL G SEN-

SOR HIGH m OUTPUT, Diagnostics Procedure with


<Ref. to ABS(diag)-106, DTC 56 DETECTION OF G

SENSOR STICK, Diagnostics Procedure with Diagnostic


<Ref. to ABS(diag)-110, DTC 73 OPEN OR SHORT

CIRCUIT IN LATERAL G SENSOR CIRCUIT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-114, DTC 73 BATTERY SHORT IN

LATERAL G SENSOR CIRCUIT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-119, DTC 73 ABNORMAL LATERAL

G SENSOR HIGH m OUTPUT, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

<Ref. to ABS(diag)-123, DTC 73 DETECTION OF LAT-

ERAL G SENSOR STICK, Diagnostics Procedure with


ABS(diag)-25

Diagnostics Procedure without Diagnostic Trouble Code (DTC)

ABS (DIAGNOSTICS)

12.Diagnostics Procedure without Diagnostic Trouble Code (DTC)

A: ABS WARNING LIGHT DOES NOT COME ON

DIAGNOSIS:

• ABS warning light circuit is open or shorted.

TROUBLE SYMPTOM:

• When the ignition switch is turned to ON (engine OFF), ABS warning light does not come on.

WIRING DIAGRAM:

LHD MODEL

BATTERY

SBF-3 SBF-1

E

RELAY HOLDER

10A

5

6

B225

ABS RELAY

3

4

2

1

B264

F46

B108

E i1

B36

IGNITION

SWITCH

No.13

B37 i2 i2

B37

COMBINATION

METER

C : i11

B : i10

B82

6

TB : TURBO ENGINE MODEL

NA : NON-TURBO ENGINE

MODEL

GROUND

TERMINAL

B81

TB

B22

E3

B100

F2

F60

E3

TB

B301

ABSCM&H/U

E E

F46

F60

B22

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

B264

1 2

3 4

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

1

B82

2

3 4 5 6

C : i11

1 2 3 4 5 6 7 8 9 10

B : i10

F2

1 2 3 4 5 6

B36

7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

1 2 3 4 5 6 7 8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

1

3

2

4

5 6

7 8

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

B225 i2

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

34 35 36

31 32 33

37

38

RELAY HOLDER

ABS00347

ABS(diag)-26


ABS (DIAGNOSTICS)

RHD MODEL

BATTERY

SBF-3 SBF-1

IGNITION

SWITCH

No.13

RELAY HOLDER

10A

3

4

B225

B37 i2

E

1

ABS RELAY

3

4

2

1

B264

E

COMBINATION

METER

C : i11

B : i10 i2

B37

B200

F74

6

B82

GROUND

TERMINAL

B81

E

E

F49 ABSCM&H/U

B264 C : i11

1 2

3 4

1 2 3 4 5 6 7 8 9 10

B : i10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

i2

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

21 22 23

24 25 26

27

28

29

30

34 35 36

31 32 33

37

38

Step Check Yes

CHECK IF OTHER WARNING LIGHTS TURN

ON.

Turn the ignition switch to ON (engine OFF).

Are other warning lights turned on?

Go to step 2.

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B82

1 2

3 4 5 6

ABS00348

No

Repair the combination meter.

<Ref. to IDI-11,

Combination

Meter Assembly.>

ABS(diag)-27


ABS (DIAGNOSTICS)

2

3

4

5

6

7

Step

CHECK ABS AND BRAKE WARNING LIGHT

BULB.


2)Remove the combination meter.

3)Remove the ABS warning light and brake warning light.

Check

Is the ABS warning light bulb open?

Yes

Replace the ABS and brake warning light bulb.

<Ref. to IDI-11,

Combination

Meter Assembly.>

CHECK BATTERY SHORT OF ABS HAR-

NESS.

1)Disconnect the connector (i2) from connector (B37).

2)Measure the voltage between connector (i2) and chassis ground.

Connector & terminal

LHD: (i2) No. 15 (+) — Chassis ground

(

−−−−):

RHD: (i2) No. 1 (+) — Chassis ground (

−−−−):

CHECK BATTERY SHORT OF ABS AND

BRAKE WARNING LIGHT HARNESS.

1)Turn the ignition switch to ON.




(

−−−−):


−−−−):

CHECK WIRING HARNESS.


2)Install the combination meter.





(

−−−−):


−−−−):




2)Measure the voltage between connector

(B37) and chassis ground.


LHD: (B37) No. 15 (+) — Chassis ground

(

−−−−):

RHD: (B37) No. 1 (+) — Chassis ground

(

−−−−):




2)Measure the voltage between connector




(

−−−−):

RHD: (B37) No. 1 (+) — Chassis ground

(

−−−−):

Is the voltage less than 3 V?

Go to step 4.


Go to step 5.

Is the voltage 10 — 15 V?

Go to step 6.


Go to step 7.


Go to step 8.

No

Go to step 3.

Repair battery short in the warning light harness.

Repair battery short in the warning light harness.

Repair open circuit in the wiring harness.

Repair battery short in the wiring harness.

Repair battery short in the wiring harness.

ABS(diag)-28

8

9

10


ABS (DIAGNOSTICS)

Step Check

CHECK GROUND CIRCUIT OF ABSCM&H/U.


2)Disconnect the connector from ABSCM&H/

U.

3)Measure the resistance between

ABSCM&H/U and chassis ground.


LHD: (B301) No. 23 — Chassis ground:

RHD: (F49) No. 23 — Chassis ground:

Is the resistance less than 0.5

Ω?


Measure the resistance between connector




RHD: (B37) No. 1 — Chassis ground:


Ω?

CHECK POOR CONTACT IN CONNECTORS.

Turn the ignition switch to OFF.

Is there poor contact in connectors between combination meter and ABSCM&H/U?

Yes

Go to step 9.

Go to step 10.

Repair the connector.

No

Repair open circuit in the ABSCM&H/

U ground harness.

Repair open circuit in the harness/ connector.

Replace the

ABSCM only.

<Ref. to ABS-6,

ABS Control Module and Hydraulic

Control Unit

(ABSCM&H/U).>

ABS(diag)-29


ABS (DIAGNOSTICS)

B: ABS WARNING LIGHT DOES NOT GO OFF

DIAGNOSIS:

• ABS warning light circuit is open or shorted.


• When starting the engine and while ABS warning light is kept ON.

WIRING DIAGRAM:

LHD MODEL

BATTERY

SBF-3 SBF-1

E

RELAY HOLDER

10A

5

6

B225

ABS RELAY

3

4

2

1

B264

F46

B108

E i1

B36

IGNITION

SWITCH

No.13

B301 ABSCM&H/U

B37 i2 i2

B37

COMBINATION

METER

C : i11

B : i10

B82

6



MODEL

GROUND

TERMINAL

B81

TB

B22

E3

B100

F2

F60

E3

TB

E E

F46 B264

1 2

3 4

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F60

B22

1

B82

2

3 4 5 6

C : i11

1 2 3 4 5 6 7 8 9 10

B :

1 2 3 4 5 6 7

i10

F2

1 2 3 4 5 6

B36

7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

1

3

2

4

5 6

7 8

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

B225 i2

9 14 15 16

10

11 12 13

17

18

19 24 25 26

20

21 22 23

27

28

29 34 35 36

30

31 32 33

37

38

RELAY HOLDER

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

ABS00347

ABS(diag)-30


ABS (DIAGNOSTICS)

RHD MODEL

BATTERY

SBF-3 SBF-1

IGNITION

SWITCH

No.13

RELAY HOLDER

10A

3

4

B225

B37 i2

E

1

ABS RELAY

3

4

2

1

B264

E

COMBINATION

METER

C : i11

B : i10 i2

B37

B200

F74

6

B82

GROUND

TERMINAL

B81

E

E

F49 ABSCM&H/U

B264 C : i11

1 2

3 4

1 2 3 4 5 6 7 8 9 10

B : i10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

i2

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

21 22 23

24 25 26

27

28

29

30

34 35 36

31 32 33

37

38

Step

CHECK INSTALLATION OF ABSCM&H/U

CONNECTOR.


Check Yes

Is the ABSCM&H/U connector inserted into ABSCM until the clamp locks onto it?

Go to step 2.

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B82

1 2

3 4 5 6

ABS00348

No

Insert the

ABSCM&H/U connector into

ABSCM&H/U until the clamp locks onto it.

ABS(diag)-31


ABS (DIAGNOSTICS)

2

3

4

5

6

7

8

9

Step

CHECK GROUND TERMINAL.

Measure the resistance between Ground terminals (B81) and chassis ground.

Terminals

Ground terminal (A) — Chassis ground:

Ground terminal (B) — Chassis ground:


Ω?

Check Yes

Go to step 3.

CHECK DIAGNOSIS LINE.

1)Connect the Ground terminal (B81) to diagnosis connector (B82) No. 6.

2)Disconnect the connector from ABSCM&

H/U.


ABSCM&H/U connector and chassis ground.





Ω?

Go to step 4.

CHECK GENERATOR.

1)Start the engine.

2)Idle the engine.

3)Measure the voltage between generator and chassis ground.

Terminals

Generator B terminal (+) — Chassis ground (

−−−−):

CHECK BATTERY TERMINAL.



Is there poor contact at battery terminal?

Go to step 5.

Repair or tighten the battery terminal.

No

Repair the open circuit in Ground terminal harness.

Repair the open circuit in harness connector between

ABSCM&H/U and diagnosis connector.

Repair the generator. <Ref. to

SC(H4SO)-13,

Generator.>

Go to step 6.

CHECK POWER SUPPLY OF ABSCM.

1)Start the engine.

2)Idle the engine.

3)Measure the voltage between ABSCM&H/U connector and chassis ground.



(

−−−−):

RHD: (F49) No. 1 (+) — Chassis ground

(

−−−−):





Does the ABS warning light turn on?

CHECK ABSCM&H/U.

Measure the resistance between ABSCM&H/U terminals.

Terminals

No. 22 — No. 23:

Is the resistance more than 1

M

Ω?

Go to step 7.

Repair the front or body wiring harness.

CHECK PROJECTION AT ABSCM&H/U.


2)Check for damage at the ABSCM&H/U terminal.

NOTE:

For detail of connector switch, refer to follow-

ing. <Ref. to ABS(diag)-12, ELECTRICAL

SPECIFICATION, Control Module I/O Signal.>

Is there any damage on projection which switches connector switch?

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 10.

Repair the

ABSCM&H/U power supply circuit.

Go to step 8.

Go to step 9.

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

ABS(diag)-32

10

11

12


ABS (DIAGNOSTICS)

Step


Measure the resistance between connector






1)Connect the connector to ABSCM&H/U.

2)Measure the resistance between connector





CHECK POOR CONTACT IN ABSCM&H/U

CONNECTOR.


Ω?

Check


M

Ω?

Is there poor contact in

ABSCM&H/U connector?

Yes

Go to step 11.

Go to step 12.


No

Repair the harness.

Repair the harness.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

ABS(diag)-33


ABS (DIAGNOSTICS)

C: BRAKE WARNING LIGHT DO NOT GO OFF

DIAGNOSIS:

• Brake warning light circuit is shorted.

• Faulty sensor/connector


• After starting the engine, brake warning light is kept ON, even if the parking brake lever has been released.

WIRING DIAGRAM:

LHD MODEL

BATTERY

SBF-1

IGNITION

SWITCH

NO.13

E

BRAKE FLUID

LEVEL SWITCH

1

2

B16

B37 i2

C: i11

B: i10 i1

B36

B99

R3

R4

PARKING

BRAKE

SWITCH

E

B301

ABSCM&H/U

B16

1

2

B:

1 2 3 4 5 6 7

i1

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

i10

8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

C:

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

i11

1 2 3 4 5 6 7 8 9 10

B99 i2

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

ABS(diag)-34

ABS00477


ABS (DIAGNOSTICS)

RHD MODEL

BATTERY

SBF-4 SBF-1

IGNITION

SWITCH

B37 i2

OM

OM

E

PARKING

BRAKE/

BRAKE

FLUID

LEVEL

WARNING

LIGHT

COMBINATION

METER

B: i10

C: i11

AS : STi KA MODEL

OM

: EXCEPT FOR STi KA MODEL

DRIVER'S CONTROL

CENTER DIFFERENTIAL

CONTROL MODULE

BRAKE FLUID

LEVEL SWITCH

11

B289 i2

B37

B62

18

F45

1

2

B16

B99

R3

B200

F74

R4 F26

1

F49 ABSCM&H/U

GENERATOR

E

PARKING BRAKE

SWITCH

B16

1

2

F26

1 2 3

C: i11

1 2 3 4 5 6 7 8 9 10

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26

27 28 29 30 31

1 2 3

9 10

4

F45

5 6 7

11 12 13 14 15 16

8

17 18

B289

B: i10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

B99 i2

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

ABS00478

Step

CHECK BRAKE FLUID AMOUNT.

Check the amount of brake fluid in reservoir tank of master cylinder.

Check Yes

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

Go to step 2.

No

Fill the brake fluid to specified amount.

ABS(diag)-35


ABS (DIAGNOSTICS)

2

3

4

5

Step

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:

Check


M

Ω?

CHECK PARKING BRAKE SWITCH.

1)Disconnect the connector (R4) from parking brake switch.

2)Release the parking brake switch.

3)Measure the resistance between parking brake switch terminal and chassis ground.

CHECK GROUND SHORT OF HARNESS.

1)Disconnect the connector form ABSCM & H/

U.

2)Disconnect the connector (i2) or (i1) from combination meter.



M

Ω?

Does the brake warning light go off?

CHECK POOR CONTACT IN ABSCM & H/U. Is there poor contact in

ABSCM & H/U connector?

Yes

Go to step 3.

Go to step 4.

Go to step 5.


No

Replace the master cylinder.

Replace the parking brake switch.

Repair the harness.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

ABS(diag)-36

Diagnostics Procedure with Diagnostic Trouble Code (DTC)

ABS (DIAGNOSTICS)

13.Diagnostics Procedure with Diagnostic Trouble Code (DTC)

A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DIAGNOSIS:

• Faulty harness connector


• Communication cannot be executed between ABS and Subaru select monitor.

WIRING DIAGRAM:

BATTERY

E

GENERATOR

RELAY

HOLDER

ABS

RELAY

RHD

F46

B108

*1

*2

B225

2

1

3

4

B264

RHD

B200

F74

LHD

IGNITION

SWITCH

LHD

E

B40

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

F46 B264

1 2

3 4

LHD

LHD

F74

7

6

B200

LHD

LHD

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

DATA LINK

CONNECTOR

4

5

B40

E

*3

ABSCM&H/U

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

34 35 36

31 32 33

37

38

ABS00371

ABS(diag)-37


ABS (DIAGNOSTICS)

1

2

3

4

5

6

7

8

9

Step

CHECK IGNITION SWITCH.

Check

Is the ignition switch turned to

ON?

Yes

Go to step 2.

CHECK BATTERY.


2)Measure the battery voltage.


Is the voltage or more 11 V?

Go to step 3.

Is there poor contact at battery terminal?

Repair or tighten the battery terminal.

Go to step 8.

CHECK COMMUNICATION OF SUBARU SE-

LECT MONITOR.


2)Using the Subaru Select Monitor, check whether communication to other system can be executed normally.

Are the name and year of system displayed on Subaru

Select Monitor?

CHECK COMMUNICATION OF SUBARU SE-

LECT MONITOR.


2)Disconnect the ABSCM&H/U connector.


4)Check whether communication to other systems can be executed normally.

Are the name and year of system displayed on Subaru

Select Monitor?

CHECK HARNESS CONNECTOR BETWEEN

EACH CONTROL MODULE AND DATA LINK

CONNECTOR.


2)Disconnect the ABSCM&H/U, ECM and

TCM connectors.

3)Measure the resistance between data link connector and chassis ground.


(B40) No. 5 — Chassis ground:

(B40) No. 4 — Chassis ground:


M

Ω?

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 7.

CHECK OUTPUT SIGNAL FOR ABSCM&

H/U.


2)Measure the voltage between ABSCM&H/U and chassis ground.


(B40) No. 5 (+) — Chassis ground (

−−−−):


−−−−):

CHECK HARNESS/CONNECTOR BETWEEN

ABSCM&H/U AND DATA LINK CONNEC-

TOR.

Measure the resistance between ABSCM&H/U connector and data link connector.


LHD:

(B301) No. 20 — (B40) No. 5:

(B301) No. 5 — (B40) No. 4:

RHD:

(F49) No. 20 — (B40) No. 5:

(F49) No. 5 — (B40) No. 4:


Go to step 8.


Ω?

Go to step 9.

CHECK INSTALLATION OF ABSCM&H/U

CONNECTOR.


Is the ABSCM&H/U connector inserted into ABSCM&H/U until the clamp locks onto it?

Go to step 10.

No

Turn the ignition switch to ON, and select ABS mode using Subaru

Select Monitor.

Charge or replace the battery.

Go to step 4.

Go to step 5.

Go to step 6.

Repair the harness and connector between each control module and data link connector.

Repair the harness and connector between each control module and data link connector.

Repair the harness and connector between

ABSCM&H/U and data link connector.

Insert the

ABSCM&H/U connector into

ABSCM&H/U.

ABS(diag)-38

10

11

12


ABS (DIAGNOSTICS)

Step Check

CHECK POWER SUPPLY CIRCUIT.

1)Turn the ignition switch to ON (engine OFF).

2)Measure the ignition power supply voltage between ABSCM&H/U connector and chassis ground.



(

−−−−):


(

−−−−):

CHECK HARNESS CONNECTOR BETWEEN

ABSCM&H/U AND CHASSIS GROUND.


2)Disconnect the connector from ABSCM&H/U and transmission.

3)Measure the resistance of harness between







Ω?

Yes

Go to step 11.

Go to step 12.

CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in control module power supply, ground line and data link connector?


No

Repair the open circuit in harness between

ABSCM&H/U and battery.

Repair the open circuit in harness between

ABSCM&H/U and inhibitor side connector, and poor contact in coupling connector.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

ABS(diag)-39


ABS (DIAGNOSTICS)

B: NO DTC

DIAGNOSIS:

• ABS warning light circuit is shorted.


• ABS warning light remains on.

• NO DTC displayed on the Subaru Select Monitor.

NOTE:

When the ABS warning light is OFF and “NO DTC” is displayed on Subaru Select Monitor, the system is in normal condition.

ABS(diag)-40


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

LHD MODEL

BATTERY

SBF-3 SBF-1

E

RELAY HOLDER

10A

5

6

B225

ABS RELAY

3

4

2

1

B264

F46

B108

E i1

B36

IGNITION

SWITCH

No.13

B301 ABSCM&H/U

B37 i2 i2

B37

COMBINATION

METER

C : i11

B : i10

B82

6



MODEL

GROUND

TERMINAL

B81

TB

B22

E3

B100

F2

F60

E3

TB

E E

F46 B264

1 2

3 4

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F60

B22

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

1

B82

2

3 4 5 6

C : i11

1 2 3 4 5 6 7 8 9 10

B :

1 2 3 4 5 6 7

i10

F2

1 2 3 4 5 6

B36

7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

1

3

2

4

5 6

7 8

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

B225 i2

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

34 35 36

31 32 33

37

38

RELAY HOLDER

ABS00347

ABS(diag)-41


ABS (DIAGNOSTICS)

RHD MODEL

BATTERY

SBF-3 SBF-1

IGNITION

SWITCH

No.13

RELAY HOLDER

10A

3

4

B225

B37 i2

E

1

ABS RELAY

3

4

2

1

B264

E

COMBINATION

METER

C : i11

B : i10 i2

B37

B200

F74

6

B82

GROUND

TERMINAL

B81

E

E

F49 ABSCM&H/U

B264 C : i11

1 2

3 4

1 2 3 4 5 6 7 8 9 10

B : i10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

i2

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

21 22 23

24 25 26

27

28

29

30

34 35 36

31 32 33

37

38

Step





Check

Does the ABS warning light turn on?

Yes

Go to step 2.

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B82

1 2

3 4 5 6

ABS00348

No

Repair the front wiring harness.

ABS(diag)-42


ABS (DIAGNOSTICS)

2

3

Step

CHECK PROJECTION AT ABSCM&H/U.



H/U.

Check

NOTE:

For detail of connector switch, refer to follow-

ing. <Ref. to ABS(diag)-12, ELECTRICAL

SPECIFICATION, Control Module I/O Signal.>


Measure the resistance between ABSCM&H/U terminals.

Terminals

No. 22 — No. 23:


M

Ω?

Yes

Is there any damage on projection which switches connector switch?

Go to step 3.

Go to step 4.

No

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Repair the harness.

4

5


Measure the resistance between connector and chassis ground.






2)Measure the resistance between connector and chassis ground.




CHECK POOR CONTACT IN ABSCM&H/U

CONNECTOR.


Ω?


M

Ω?

Is there poor contact in

ABSCM&H/U connector?

Go to step 5.

Go to step 6.


Repair the harness.

6

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

C: DTC 21 OPEN OR SHORT CIRCUIT IN FRONT RIGHT ABS WHEEL SPEED

SENSOR CIRCUIT

NOTE:

For the diagnostic procedure, refer to DTC 27. <Ref. to ABS(diag)-44, DTC 27 OPEN OR SHORT CIRCUIT

IN REAR LEFT ABS WHEEL SPEED SENSOR CIRCUIT, Diagnostics Procedure with Diagnostic Trouble

Code (DTC).>

D: DTC 23 OPEN OR SHORT CIRCUIT IN FRONT LEFT ABS WHEEL SPEED

SENSOR CIRCUIT

NOTE:



Code (DTC).>

E: DTC 25 OPEN OR SHORT CIRCUIT IN REAR RIGHT ABS WHEEL SPEED

SENSOR CIRCUIT

NOTE:



Code (DTC).>

ABS(diag)-43


ABS (DIAGNOSTICS)

F: DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS WHEEL SPEED SEN-

SOR CIRCUIT

DIAGNOSIS:

• Faulty ABS wheel speed sensor (Broken wire, input voltage too high)



• ABS does not operate.

ABS(diag)-44


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

1

2

6

B303

SHIELD JOINT

CONNECTOR

B62

F45

B99

R3

F94 B15

R73 R72

F94

B15

2 1

FRONT

ABS

SENSOR LH

R72

R73

1 2

FRONT

ABS

SENSOR RH

B303

1 2 3

5 6 7

4

8

REAR

ABS

SENSOR LH

REAR

ABS

SENSOR RH

B99

F45

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

E

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00353

ABS(diag)-45


ABS (DIAGNOSTICS)

RHD MODEL

F49

ABSCM&H/U

F74

B200

1

2

7

F62

SHIELD JOINT

CONNECTOR

B99

R3

F94

F95

2 1

F94 F95

R73 R72

E

R72

R73

1 2

FRONT

ABS

SENSOR LH

F62

1 2 3

5 6 7

4

8

FRONT

ABS

SENSOR RH

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

REAR

ABS

SENSOR LH

REAR

ABS

SENSOR RH

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

B99

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

ABS00354

ABS(diag)-46

5

6

1

2

3

4

7


ABS (DIAGNOSTICS)

Step

CHECK OUTPUT OF ABS WHEEL SPEED

SENSOR USING SUBARU SELECT MONI-

TOR.

1)Select “Current data display & Save” on the

Subaru Select Monitor.

2)Read the ABS wheel speed sensor output corresponding to faulty system in the Subaru

Select Monitor data display mode.

CHECK INSTALLATION OF ABS WHEEL

SPEED SENSOR.

Check

Does the speed indicated on display change in response to speedometer reading during acceleration/deceleration when the steering wheel is in straight-ahead position?

Yes

Go to step 2.

Are the ABS wheel speed sensor installation bolts tightened

33 N·m (3.3 kgf-m, 24 ft-lb)?

Go to step 3.

No

Go to step 8.

CHECK ABS WHEEL SPEED SENSOR GAP.

Measure the tone wheel to ABS wheel speed sensor piece gap over entire perimeter of the wheel.

CHECK TONE WHEEL RUNOUT.

Measure the tone wheel runout.

Is the gap as following value?

Front wheel:

0.3 — 0.8 mm (0.012 — 0.031 in)

Rear wheel

0.7 — 1.2 mm (0.028 — 0.047 in)

Is the runout less than 0.05 mm (0.0020 in)?

Go to step 4.

Go to step 5.



Is there poor contact in connectors between ABSCM&H/U and ABS wheel speed sensor?



1)Connect all connectors.

2)Erase the memory.

3)Perform the inspection mode.

4)Read out the DTC.

Is the same DTC as in the current diagnosis still being output?

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

CHECK ANY OTHER DTC APPEARANCE.

Are other DTCs being output? Proceed with the diagnosis corresponding to DTC.

Tighten the ABS wheel speed sensor installation bolts securely.

Adjust the gap.

NOTE:

Adjust the gap using spacers (Part

No. 26755AA000).

If the spacers cannot correct gap, replace worn sensor or worn tone wheel.

Replace the tone wheel. Front:

<Ref. to ABS-19,

Front Tone

Wheel.> Rear:

<Ref. to ABS-20,

Rear Tone

Wheel.>

Go to step 6.

Go to step 7.

A temporary poor contact.

NOTE:

Check the harness and connectors between AB-

SCM&H/U and

ABS wheel speed sensor.

ABS(diag)-47


ABS (DIAGNOSTICS)

8

9

10

11

Step Check

CHECK ABS WHEEL SPEED SENSOR.


2)Disconnect the connector from ABS wheel speed sensor.

3)Measure the resistance of ABS wheel speed sensor connector terminals while shaking the harness lightly.

Terminals

Front RH No. 1 — No. 2:

Front LH No. 1 — No. 2:

Rear RH No. 1 — No. 2:

Rear LH No. 1 — No. 2:

Is the resistance as following value?

Front: 1 — 1.5 k

Ω

Rear: 1.025 — 1.265 k

Ω

Yes

Go to step 9.

CHECK BATTERY SHORT OF ABS WHEEL

SPEED SENSOR.


H/U.

2)Measure the voltage between ABS wheel speed sensor and chassis ground.

Terminals

Front RH No. 1 (+) — Chassis ground (

−−−−):

Front LH No. 1 (+) — Chassis ground (

−−−−):

Rear RH No. 1 (+) — Chassis ground (

−−−−):

Rear LH No. 1 (+) — Chassis ground (

−−−−):

CHECK BATTERY SHORT OF ABS WHEEL

SPEED SENSOR.


2)Measure the voltage between ABS wheel speed sensor and chassis ground.

Terminals

Front RH No. 1 (+) — Chassis ground (

−−−−):

Front LH No. 1 (+) — Chassis ground (

−−−−):

Rear RH No. 1 (+) — Chassis ground (

−−−−):

Rear LH No. 1 (+) — Chassis ground (

−−−−):


ABSCM&H/U AND ABS WHEEL SPEED

SENSOR.


2)Connect the connector to ABS wheel speed sensor.


ABSCM&H/U connector terminals.


DTC 21

LHD: (B301) No. 11 — No. 12:

RHD: (F49) No. 11 — No. 12:

DTC 23

LHD: (B301) No. 9 — No. 10:

RHD: (F49) No. 9 — No. 10:

DTC 25

LHD: (B301) No. 14 — No. 15:

RHD: (F49) No. 14 — No. 15:

DTC 27

LHD: (B301) No. 7 — No. 8:

RHD: (F49) No. 7 — No. 8:


Go to step 10.


Go to step 11.


Front: 1 — 1.5 k

Ω

Rear: 1.025 — 1.265 k

Ω

Go to step 12.

No

Replace the ABS wheel speed sensor. Front: <Ref. to

ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.>


ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.>


ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.>

Repair the harness/connector between

ABSCM&H/U and


ABS(diag)-48

12

13

14


ABS (DIAGNOSTICS)

Step Check Yes

CHECK BATTERY SHORT OF HARNESS.

Measure the voltage between ABSCM&H/U connector and chassis ground.


DTC 21

LHD: (B301) No. 11 (+) — Chassis ground (

−−−−):


(

−−−−):

DTC 23


(

−−−−):


(

−−−−):

DTC 25


−−−−):


(

−−−−):

DTC 27


(

−−−−):


(

−−−−):





DTC 21


−−−−):


(

−−−−):

DTC 23


(

−−−−):


(

−−−−):

DTC 25


−−−−):


(

−−−−):

DTC 27


(

−−−−):


(

−−−−):


SPEED SENSOR.


Go to step 13.


Go to step 14.


33 N·m (3.3 kgf-m, 24 ft-lb)?

Go to step 15.

No

Repair the harness between

ABSCM&H/U and



ABSCM&H/U and



ABS(diag)-49


ABS (DIAGNOSTICS)

15

Step Check Yes




Front wheel:

0.3 — 0.8 mm (0.012 — 0.031 in)

Rear wheel:

0.7 — 1.2 mm (0.028 — 0.047 in)

Go to step 16.

16

17

18

19




Go to step 17.

CHECK GROUND SHORT OF ABS WHEEL

SPEED SENSOR.


2)Measure the resistance between ABS wheel speed sensor and chassis ground.

Terminals

Front RH No. 1 — Chassis ground:

Front LH No. 1 — Chassis ground:

Rear RH No. 1 — Chassis ground:

Rear LH No. 1 — Chassis ground:


M

Ω?

Go to step 18.





ABSCM&H/U connector terminal and chassis ground.


DTC 21



DTC 23



DTC 25



DTC 27




M

Ω?

Go to step 19.

CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connectors between ABSCM&H/U and ABS wheel speed sensor?


No

Adjust the gap.

NOTE:

Adjust the gap using spacers (Part

No. 26755AA000).



<Ref. to ABS-19,

Front Tone

Wheel.> Rear:

<Ref. to ABS-20,

Rear Tone

Wheel.>

Replace the ABS wheel speed sensor and

ABSCM&H/U.

Front: <Ref. to

ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.> and <Ref. to ABS-

6, ABS Control

Module and

Hydraulic Control

Unit (ABSCM&H/

U).>


ABSCM&H/U and


And replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 20.

ABS(diag)-50


ABS (DIAGNOSTICS)

20

21

Step



2)Erase the memory.


4)Read out the DTC.

Check

Is the same DTC as in current diagnosis still being output?

Yes

Replace the

ABSCM only.



No

Go to step 21.


NOTE:

Check the harness and connectors between AB-

SCM&H/U and


G: DTC 22 FRONT RIGHT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL

NOTE:

For the diagnostic procedure, refer to DTC 28. <Ref. to ABS(diag)-52, DTC 28 REAR LEFT ABNORMAL

ABS WHEEL SPEED SENSOR SIGNAL, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

H: DTC 24 FRONT LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL

NOTE:



I: DTC 26 REAR RIGHT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL

NOTE:



ABS(diag)-51


ABS (DIAGNOSTICS)

J: DTC 28 REAR LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL

DIAGNOSIS:

• Faulty ABS wheel speed sensor signal (noise, irregular signal, etc.)

• Faulty harness/connector



WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

1

2

6

B303

SHIELD JOINT

CONNECTOR

B62

F45

B99

R3

F94 B15

R73 R72

F94

B15

2 1

FRONT

ABS

SENSOR LH

R72

R73

1 2

FRONT

ABS

SENSOR RH

B303

1 2 3

5 6 7

4

8

REAR

ABS

SENSOR LH

REAR

ABS

SENSOR RH

B99

F45

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

ABS(diag)-52

E

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00353

RHD MODEL


ABS (DIAGNOSTICS)

F49

ABSCM&H/U

F74

B200

1

2

7

F62

SHIELD JOINT

CONNECTOR

B99

R3

F94

F95

2 1

F94 F95

R73 R72

E

R72

R73

1 2

FRONT

ABS

SENSOR LH

F62

1 2 3

5 6 7

4

8

FRONT

ABS

SENSOR RH

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

REAR

ABS

SENSOR LH

REAR

ABS

SENSOR RH

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

B99

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

ABS00354

ABS(diag)-53


ABS (DIAGNOSTICS)

1

2

3

4

5

6

7

8

9

10

Step

CHECK OUTPUT OF ABS WHEEL SPEED

SENSOR USING SUBARU SELECT MONI-

TOR.



2)Read the ABS wheel speed sensor output corresponding to faulty system in the Subaru

Select Monitor data display mode.

Check

Does the speed indicated on display change in response to speedometer reading during acceleration/deceleration when the steering wheel is in straight-ahead position?

Yes

Go to step 2.



Is there poor contact in connectors between ABSCM&H/U and ABS wheel speed sensor?


CHECK SOURCES OF SIGNAL NOISE.


No

Go to step 8.

Go to step 3.

Is the car telephone or wireless transmitter properly installed?

Go to step 4.

Properly install the car telephone or wireless transmitter.

Are noise sources (such as an antenna) installed near the sensor harness?

Install the noise sources apart from sensor harness.

Go to step 5.


Ω?

Go to step 6.

Repair the shield harness.

CHECK SHIELD CIRCUIT.



3)Measure the resistance between shield connector and chassis ground.


DTC 22



DTC 24



NOTE:

If the DTC is 26, 28: Go to YES.



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 7.




SPEED SENSOR.


33 N·m (3.3 kgf-m, 24 ft-lb)?

Go to step 9.

A temporary noise interference.


Adjust the gap.


Measure the tone wheel to ABS wheel speed sensor piece gap over entire perimeter of wheel.


Front wheel:

0.3 — 0.8 mm (0.012 — 0.031 in)

Rear wheel:

0.7 — 1.2 mm (0.028 — 0.047 in)

Go to step 10.

PREPARE OSCILLOSCOPE.

Is an oscilloscope available?

Go to step 11.

NOTE:

Adjust the gap using spacer (Part

No. 26755AA000).


Go to step 12.

ABS(diag)-54

11

12

13

14


ABS (DIAGNOSTICS)

Step

CHECK ABS WHEEL SPEED SENSOR SIG-

NAL.

1)Raise all four wheels off ground.


3)Connect the oscilloscope to the connector.


5)Rotate the wheels and measure voltage at

specified frequency. <Ref. to ABS(diag)-15,

WAVEFORM, Control Module I/O Signal.>

NOTE:

When this inspection is completed, the

ABSCM&H/U sometimes stores DTC 29 or

DTC 56.

Check

Is an oscilloscope pattern smooth, as shown in the figure?


DTC 22

LHD: (B15) No. 1 (+) — No. 2 (

−−−−):

RHD: (F95) No. 1 (+) — No. 2 (

−−−−):

DTC 24

LHD: (B62) No. 20 (+) — No. 24 (

−−−−):

RHD: (F94) No. 1 (+) — No. 2 (

−−−−):

DTC 26

LHD: (B99) No. 10 (+) — No. 9 (

−−−−):

RHD: (B99) No. 32 (+) — No. 31 (

−−−−):

DTC 28

LHD: (B99) No. 5 (+) — No. 4 (

−−−−):

RHD: (B99) No. 21 (+) — No. 20 (

−−−−):

CHECK CONTAMINATION OF ABS WHEEL

SPEED SENSOR OR TONE WHEEL.

Remove the disc rotor or drum from hub in accordance with DTC.

CHECK DAMAGE OF ABS WHEEL SPEED

SENSOR OR TONE WHEEL.

Is the ABS wheel speed sensor piece or tone wheel contaminated by dirt or other foreign matter?

Are there broken or damaged in the ABS wheel speed sensor piece or tone wheel?

Yes

Go to step 15.

Thoroughly remove dirt or other foreign matter.

Go to step 14.




Go to step 15.

No

Go to step 12.

Go to step 13.

Replace the ABS wheel speed sensor or tone wheel.

Front: <Ref. to

ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.> and Front: <Ref. to

ABS-19, Front

Tone Wheel.>

Rear: <Ref. to

ABS-20, Rear

Tone Wheel.>


<Ref. to ABS-19,

Front Tone

Wheel.> Rear:

<Ref. to ABS-20,

Rear Tone

Wheel.>

ABS(diag)-55


ABS (DIAGNOSTICS)

15

16

17

18

Step Check

CHECK RESISTANCE OF ABS WHEEL

SPEED SENSOR.


2)Disconnect the connector from ABS wheel speed sensor.

3)Measure the resistance between ABS wheel speed sensor connector terminals while shaking the harness lightly.

Terminals

Front RH No. 1 — No. 2:

Front LH No. 1 — No. 2:

Rear RH No. 1 — No. 2:

Rear LH No. 1 — No. 2:


Front: 1 — 1.5 k

Ω

Rear: 1.025 — 1.265 k

Ω

CHECK GROUND SHORT OF ABS WHEEL

SPEED SENSOR.

Measure the resistance between ABS wheel speed sensor and chassis ground.

Terminals

Front RH No. 1 — Chassis ground:

Front LH No. 1 — Chassis ground:

Rear RH No. 1 — Chassis ground:

Rear LH No. 1 — Chassis ground:


M

Ω?


ABSCM&H/U AND ABS WHEEL SPEED

SENSOR.



H/U.

3)Measure the resistance at ABSCM&H/U connector terminals.


DTC 22

LHD: (B301) No. 11 — No. 12:

RHD: (F49) No. 11 — No. 12:

DTC 24

LHD: (B301) No. 9 — No. 10:

RHD: (F49) No. 9 — No. 10:

DTC 26

LHD: (B301) No. 14 — No. 15:

RHD: (F49) No. 14 — No. 15:

DTC 28

LHD: (B301) No. 7 — No. 8:

RHD: (F49) No. 7 — No. 8:


Front: 1 — 1.5 k

Ω

Rear: 1.025 — 1.265 k

Ω


Measure the resistance between ABSCM&H/U connector and chassis ground.


DTC 22



DTC 24



DTC 26



DTC 28




M

Ω?

Yes

Go to step 16.

Go to step 17.

Go to step 18.

Go to step 19.

No


ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.>


ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.>


ABSCM&H/U and



ABSCM&H/U and


ABS(diag)-56

22

23

20

21

19

24

25


ABS (DIAGNOSTICS)

Step Check


Measure the resistance between ABSCM&H/U and chassis ground.





Ω?

Yes

Go to step 20.

CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connectors between ABSCM&H/U and ABS wheel speed sensor?



Is the car telephone or the wireless transmitter properly installed?

Go to step 22.

No

Repair the

ABSCM&H/U ground harness.

Go to step 21.



CHECK SHIELD CIRCUIT.


2)Measure the resistance between shield connector and chassis ground.


DTC 22



DTC 24





Go to step 23.


Ω?

Go to step 24.

NOTE:

If the DTC is 26, 28: Go to YES.



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Repair the shield harness.

Go to step 25.

A temporary noise interference.

NOTE:

Although the ABS warning light remains illuminating at this point, this is a normal condition.

Vehicle must be driven at approx.

12 km/h (7.46

MPH) or faster to turn off ABS warning light. Make sure that the ABS warning light goes off after driving vehicle.

ABS(diag)-57


ABS (DIAGNOSTICS)

K: DTC 29 ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL ON ANY ONE

OF FOUR SENSOR

DIAGNOSIS:

• Faulty ABS wheel speed sensor signal (noise, irregular signal, etc.)

• Faulty tone wheel

• Wheels turning freely for a long time



• EBD does not operate.

NOTE:

In addition to the ABS warning light, brake warning light illuminates.

ABS(diag)-58


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

1

2

6

B303

SHIELD JOINT

CONNECTOR

B62

F45

B99

R3

F94 B15

R73 R72

F94

B15

2 1

FRONT

ABS

SENSOR LH

R72

R73

1 2

FRONT

ABS

SENSOR RH

B303

1 2 3

5 6 7

4

8

REAR

ABS

SENSOR LH

REAR

ABS

SENSOR RH

B99

F45

1 2 3 4 5 6 7 8 9 10 11

12 13 14 15 16 17 18 19 20 21 22 23 24

E

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00353

ABS(diag)-59


ABS (DIAGNOSTICS)

RHD MODEL

F49

ABSCM&H/U

F74

B200

1

2

7

F62

SHIELD JOINT

CONNECTOR

B99

R3

F94

F95

2 1

F94 F95

R73 R72

E

R72

R73

1 2

FRONT

ABS

SENSOR LH

F62

1 2 3

5 6 7

4

8

FRONT

ABS

SENSOR RH

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

REAR

ABS

SENSOR LH

REAR

ABS

SENSOR RH

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

B99

1 2 3 4

10 11 12 13 14 15

22 23 24 25

16

5 6

17

26 27 28 29

18

30

7 8

19 20

31

9

21

32

ABS00354

ABS(diag)-60

1

2

3

4

5

6

7

8


ABS (DIAGNOSTICS)

Step

CHECK IF THE WHEELS HAVE TURNED

FREELY FOR A LONG TIME.

CHECK TIRE SPECIFICATIONS.


CHECK WEAR OF TIRE.

CHECK TIRE PRESSURE.


SPEED SENSOR.

PREPARE OSCILLOSCOPE.

CHECK ABS WHEEL SPEED SENSOR SIG-

NAL.

1)Raise all four wheels off ground.


3)Connect the oscilloscope to the connector.


5)Rotate the wheels and measure voltage at

specified frequency. <Ref. to ABS(diag)-15,

WAVEFORM, Control Module I/O Signal.>

Check Yes No

Is the wheels have been turned freely for more than one minute, such as when vehicle is jacked-up, under full-lock cornering or the tires not in contact with road surface?

The ABS is normal. Erase the

DTC.

NOTE:

When the wheels turn freely for a long time, such as when vehicle is towed or jackedup, or when steering wheel is continuously turned all way, this DTC may sometimes occur.

Go to step 2.

Are the tire specifications correct?

Go to step 3.

Replace the tire.

Is the tire worn excessively?

Replace the tire.

Go to step 4.

Is the tire pressure correct?

Go to step 5.


33 N·m (3.3 kgf-m, 24 ft-lb)?




Front wheel:

0.3 — 0.8 mm (0.012 — 0.031 in)

Rear wheel:

0.7 — 1.2 mm (0.028 — 0.047 in)

Go to step 7.

Is an oscilloscope available?

Is an oscilloscope pattern smooth, as shown in the figure?

Go to step 6.

Go to step 8.

Go to step 12.

Adjust the tire pressure.


Adjust the gap.

NOTE:

Adjust the gap using spacer (Part

No. 26755AA000).


Go to step 9.

Go to step 9.

NOTE:

When this inspection is completed, ABSCM&

H/U sometimes stores the DTC 29.


Front RH

LHD: (B15) No. 1 (+) — No. 2 (

−−−−):

RHD: (F95) No. 1 (+) — No. 2 (

−−−−):

Front LH

LHD: (B62) No. 20 (+) — No. 24 (

−−−−):

RHD: (F94) No. 1 (+) — No. 2 (

−−−−):

Rear RH

LHD: (B99) No. 10 (+) — No. 9 (

−−−−):

RHD: (B99) No. 32 (+) — No. 31 (

−−−−):

Rear LH

LHD: (B99) No. 5 (+) — No. 4 (

−−−−):

RHD: (B99) No. 21 (+) — No. 22 (

−−−−):

ABS(diag)-61


ABS (DIAGNOSTICS)

9

10

11

12

13

Step

CHECK CONTAMINATION OF ABS WHEEL

SPEED SENSOR OR TONE WHEEL.

Remove the disc rotor or drum from hub.

CHECK DAMAGE OF ABS WHEEL SPEED

SENSOR OR TONE WHEEL.






3)Erase the memory.


5)Read out the DTC.

Check

Is the ABS wheel speed sensor piece or tone wheel contaminated by dirt or other foreign matter?

Are there broken or damaged teeth in the ABS wheel speed sensor piece or tone wheel?



Yes

Thoroughly remove dirt or other foreign matter.

No

Go to step 10.

Replace the ABS wheel speed sensor or tone wheel.

Front: <Ref. to

ABS-13, Front

ABS Wheel Speed

Sensor.> Rear:

<Ref. to ABS-16,

Rear ABS Wheel

Speed Sensor.> and Front: <Ref. to

ABS-19, Front

Tone Wheel.>

Rear: <Ref. to

ABS-20, Rear

Tone Wheel.>

Go to step 11.

Go to step 12.


<Ref. to ABS-19,

Front Tone

Wheel.> Rear:

<Ref. to ABS-20,

Rear Tone

Wheel.>

Go to step 13.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>




L: DTC 31 FRONT RIGHT INLET VALVE MALFUNCTION

NOTE:

For the diagnostic procedure, refer to DTC 37. <Ref. to ABS(diag)-63, DTC 37 REAR LEFT INLET VALVE

MALFUNCTION, Diagnostics Procedure with Diagnostic Trouble Code (DTC).>

M: DTC 33 FRONT LEFT INLET VALVE MALFUNCTION

NOTE:



N: DTC 35 REAR RIGHT INLET VALVE MALFUNCTION

NOTE:



ABS(diag)-62


ABS (DIAGNOSTICS)

O: DTC 37 REAR LEFT INLET VALVE MALFUNCTION

DIAGNOSIS:


• Faulty inlet solenoid valve




NOTE:


ABS(diag)-63


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

BATTERY

E

GENERATOR

RELAY

HOLDER

ABS

RELAY

RHD

F46

B108

*1

*2

B225

2

1

3

4

B264

RHD

B200

F74

LHD

IGNITION

SWITCH

E

LHD

F46

B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

*3

ABSCM&H/U

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

31 32 33

34 35 36

37

38

ABS00356

ABS(diag)-64


ABS (DIAGNOSTICS)

1

2

3

4

5

Step Check

CHECK INPUT VOLTAGE OF ABSCM&H/U.



H/U.

3)Run the engine at idle.




(

−−−−):


(

−−−−):










Ω?

Yes

Go to step 2.

Go to step 3.

CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connectors between generator, battery and ABSCM&H/U?



2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Repair the harness connector between battery, ignition switch and

ABSCM&H/U.

Repair the


Go to step 4.

Go to step 5.


P: DTC 32 FRONT RIGHT OUTLET VALVE MALFUNCTION

NOTE:

For the diagnostic procedure, refer to DTC 38. <Ref. to ABS(diag)-66, DTC 38 REAR LEFT OUTLET VALVE


Q: DTC 34 FRONT LEFT OUTLET VALVE MALFUNCTION

NOTE:



R: DTC 36 REAR RIGHT OUTLET VALVE MALFUNCTION

NOTE:



ABS(diag)-65


ABS (DIAGNOSTICS)

S: DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION

DIAGNOSIS:


• Faulty outlet solenoid valve




NOTE:


ABS(diag)-66


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

BATTERY

E

GENERATOR

RELAY

HOLDER

ABS

RELAY

RHD

F46

B108

*1

*2

B225

2

1

3

4

B264

RHD

B200

F74

LHD

IGNITION

SWITCH

E

LHD

F46

B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

*3

ABSCM&H/U

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

31 32 33

34 35 36

37

38

ABS00356

ABS(diag)-67


ABS (DIAGNOSTICS)

1

2

3

4

5

Step Check




H/U.





(

−−−−):


(

−−−−):










Ω?

Yes

Go to step 2.

Go to step 3.




2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No


ABSCM&H/U.

Repair the


Go to step 4.

Go to step 5.


ABS(diag)-68


ABS (DIAGNOSTICS)

T: DTC 41 ABS CONTROL MODULE MALFUNCTION

DIAGNOSIS:

• Faulty ABSCM&H/U




NOTE:


WIRING DIAGRAM:

B301 : LHD

F49

:

RHD

ABSCM&H/U

E

B301

: LHD

F49

:

RHD

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

LHD : LHD MODEL

RHD : RHD MODEL

ABS00234

ABS(diag)-69


ABS (DIAGNOSTICS)

1

2

3

4

5

6

Step Check




H/U.







Ω?

Yes

Go to step 2.

No

Repair the


CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connectors between battery, ignition switch and ABSCM&H/U?



Is the car telephone or wireless transmitter properly installed?


Go to step 4.

Go to step 3.




Go to step 5.




3)Erase the memory.


5)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Go to step 6.


ABS(diag)-70


ABS (DIAGNOSTICS)

U: DTC 42 POWER SUPPLY VOLTAGE TOO LOW

DIAGNOSIS:

• Power source voltage of the ABSCM&H/U is low.



• EBD may not operate.

NOTE:

In addition to the ABS warning light, brake warning light illuminates temporarily when the EBD does not operate. Both warning lights go off on the recovery of voltage.

ABS(diag)-71


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

BATTERY

E

GENERATOR

RELAY

HOLDER

ABS

RELAY

RHD

F46

B108

*1

*2

B225

2

1

3

4

B264

RHD

B200

F74

LHD

IGNITION

SWITCH

E

LHD

F46

B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

*3

ABSCM&H/U

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

31 32 33

34 35 36

37

38

ABS00356

ABS(diag)-72

5

6

2

3

1

4

7


ABS (DIAGNOSTICS)

Step


1)Start the engine.

2)Idle after warm-up.

3)Measure the voltage between generator B terminal and chassis ground.

Terminals


−−−−):



Check


Are the positive and negative battery terminals tightly clamped?



H/U.


3)Operate the electric load applying devices, such as the headlight, A/C, and defogger.




(

−−−−):


(

−−−−):










Ω?

Yes

Go to step 2.

Go to step 3.

Go to step 4.

Go to step 5.




2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No


SC(H4SO)-13,

Generator.>

Tighten the clamp of terminal.


ABSCM&H/U.

Repair the


Go to step 6.

Go to step 7.


ABS(diag)-73


ABS (DIAGNOSTICS)

V: DTC 42 POWER SUPPLY VOLTAGE TOO HIGH

DIAGNOSIS:

• Power source voltage of the ABSCM&H/U is high.




NOTE:

In addition to the ABS warning light, brake warning light illuminates temporarily when the EBD does not operate. Both warning lights go off on the recovery of voltage.

ABS(diag)-74


ABS (DIAGNOSTICS)

WIRING DIAGRAM:

BATTERY

E

GENERATOR

RELAY

HOLDER

ABS

RELAY

RHD

F46

B108

*1

*2

B225

2

1

3

4

B264

RHD

B200

F74

LHD

IGNITION

SWITCH

E

LHD

F46

B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

*3

ABSCM&H/U

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

31 32 33

34 35 36

37

38

ABS00356

ABS(diag)-75


ABS (DIAGNOSTICS)

1

2

3

4

5

6

7

Step


1)Start the engine.

2)Idle after warm-up.

3)Measure the voltage between generator B terminal and chassis ground.

Terminals


−−−−):



Check


Are the positive and negative battery terminals tightly clamped?



H/U.


3)Operate the electric load applying devices, such as the headlight, A/C, and defogger.




(

−−−−):


(

−−−−):








Is the voltage 10 and 17 V?


Ω?

Yes

Go to step 2.

Go to step 3.

Go to step 4.

Go to step 5.




2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No


SC(H4SO)-13,

Generator.>

Tighten the clamp of terminal.


ABSCM&H/U.

Repair the


Go to step 6.

Go to step 7.


ABS(diag)-76


ABS (DIAGNOSTICS)

W: DTC 44 ABS-AT CONTROL (NON CONTROLLED)

DIAGNOSIS:

• Combination of AT control faults



WIRING DIAGRAM:

*1 ABSCM&H/U

*1: LHD

B301

RHD

F49

F74

B200

RHD

RHD

B55 TCM

1

B55

1 2 3 4

10 11 12 13

5 6

14 15

7

16

8

17

9

18

19 20 21 22 23 24

*1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26

27 28 29 30 31

Step Check

CHECK SPECIFICATIONS OF THE AB-

SCM&H/U.

Check specifications of mark on ABSCM&H/U.

CK: FWD AT

CL: FWD MT

CU: AWD AT

CV: AWD MT

CX: AWD MT (STi model)

CY: AWD MT (STi with Driver’s control center differential model)

Does the vehicle specification and ABSCM&H/U specification match?

Yes

Go to step 2.

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

ABS00360

No

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

ABS(diag)-77


ABS (DIAGNOSTICS)

2

3

4

5

6

7

8

Step



2)Disconnect the two connectors from TCM.


H/U.






Check


M

Ω?

Yes

Go to step 3.

No


TCM and

ABSCM&H/U.

CHECK TCM.

1)Connect all connectors to TCM.


3)Measure the voltage between TCM connector terminal and chassis ground.



−−−−):

CHECK AT.


Go to step 5. Go to step 4.

CHECK OPEN CIRCUIT OF HARNESS.

Measure the voltage between ABSCM&H/U connector and chassis ground.


LHD:


−−−−):


−−−−):

RHD:

(F49) No. 3 (+) — Chassis ground (

−−−−):


−−−−):

Is the AT functioning normally? Replace the TCM. Repair the AT.


CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connectors between TCM and

ABSCM&H/U?

Go to step 6.


Repair the harness/connector between TCM and

ABSCM&H/U.

Go to step 7.



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Go to step 8.


ABS(diag)-78


ABS (DIAGNOSTICS)

X: DTC 44 ABS-AT CONTROL (CONTROLLED)

DIAGNOSIS:

• Combination of AT control faults



WIRING DIAGRAM:

*1 ABSCM&H/U

B55

1 2 3 4

10 11 12 13

5 6

14 15

7

16

8

17

9

18

19 20 21 22 23 24

*1: LHD

B301

RHD

F49

F74

B200

RHD

RHD

B55 TCM

*1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26

27 28 29 30 31

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

ABS00360

ABS(diag)-79


ABS (DIAGNOSTICS)

1

2

3

4

5

6

Step Check Yes



2)Disconnect all connectors from TCM.


H/U.




(

−−−−):


(

−−−−):






(

−−−−):


(

−−−−):

CHECK OPEN CIRCUIT OF HARNESS.


2)Connect all connectors to TCM.




LHD:


−−−−):


−−−−):

RHD:


−−−−):


−−−−):




Go to step 2.


Go to step 3.


Is there poor contact in connectors between TCM and

ABSCM&H/U?

Go to step 4.




2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No


TCM and

ABSCM&H/U.


TCM and

ABSCM&H/U.

Repair the harness/connector between TCM and

ABSCM&H/U.

Go to step 5.

Go to step 6.


ABS(diag)-80


ABS (DIAGNOSTICS)

Y: DTC 51 VALVE RELAY MALFUNCTION

DIAGNOSIS:

• Faulty valve relay




NOTE:

In addition to the ABS warning light, brake warning light illuminates when the EBD does not operate.

WIRING DIAGRAM:

BATTERY

SBF-3 SBF-1

*3

RHD

F44

B61

RHD

RHD

F46

B108

RELAY

HOLDER

*1

*2

ABS RELAY

B225

2

1

3

4

B264

B200

F74

RHD

LHD

LHD

IGNITION

SWITCH

E

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

ABSCM&H/U

E

VALVE RELAY MOTOR RELAY

F46 B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F44

1 2 3 4

5 6 7 8

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

34 35 36

31 32 33

37

38

ABS00362

ABS(diag)-81


ABS (DIAGNOSTICS)

1

2

3

4

5

Step Check




H/U.




LHD:


−−−−):


−−−−):

RHD:


−−−−):


−−−−):










Ω?

Yes

Go to step 2.

Go to step 3.




2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Repair the harness connector between battery and ABSCM&H/U.

Repair the


Go to step 4.

Go to step 5.


ABS(diag)-82


ABS (DIAGNOSTICS)

Z: DTC 51 VALVE RELAY ON FAILURE

DIAGNOSIS:

• Faulty valve relay



WIRING DIAGRAM:

BATTERY

SBF-3 SBF-1

*3

RHD

F44

B61

RHD

RHD

F46

B108

RELAY

HOLDER

*1

*2

ABS RELAY

B225

2

1

3

4

B264

B200

F74

RHD

LHD

LHD

IGNITION

SWITCH

E

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

ABSCM&H/U

E


F46 B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F44

1 2 3 4

5 6 7 8

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

24 25 26

21 22 23

27

28

29

30

34 35 36

31 32 33

37

38

ABS00362

ABS(diag)-83


ABS (DIAGNOSTICS)

1

2

3

4

Step

CHECK VALVE RELAY IN ABSCM&H/U.


H/U.


ABSCM&H/U terminals.

Terminals

No. 23 — No. 24:


M

Ω?

Check Yes

Go to step 2.




2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 3.

Go to step 4.


ABS(diag)-84


ABS (DIAGNOSTICS)

AA:DTC 52 OPEN CIRCUIT IN MOTOR RELAY CIRCUIT

DIAGNOSIS:

• Faulty motor

• Faulty motor relay




WIRING DIAGRAM:

BATTERY

SBF-1

RHD

F44

B61

RHD

RHD

F96

B255

F46

B108

RELAY

HOLDER

*1

*2

ABS RELAY

B225

B61

F44

2

1

3

4

B264

RHD

LHD

IGNITION

SWITCH

B200

F74

E

LHD

*3

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

ABSCM&H/U

E E


F46 B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F44

1 2 3 4

5 6 7 8

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

21 22 23

24 25 26

27

28

29

30

34 35 36

31 32 33

37

38

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

ABS00364

ABS(diag)-85


ABS (DIAGNOSTICS)

1

2

3

4

5

6

Step Check




H/U.





−−−−):


(

−−−−):

CHECK GROUND CIRCUIT OF MOTOR.









Ω?

Yes

Go to step 2.

Go to step 3.

CHECK MOTOR OPERATION.

Operate the sequence control. <Ref. to ABS-

10, ABS Sequence Control.>

NOTE:

Use the diagnosis connector to operate sequence control.

Can motor revolution noise

(buzz) be heard when carrying out the check sequence?

Go to step 4.

No

Repair the harness/connector between battery and ABSCM&H/U and check fuse

SBF8.

Repair the




Is there poor contact in connector between generator, battery and ABSCM&H/U?




2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 5.

Go to step 6.


ABS(diag)-86


ABS (DIAGNOSTICS)

AB:DTC 52 MOTOR RELAY ON FAILURE

DIAGNOSIS:

• Faulty motor





WIRING DIAGRAM:

BATTERY

SBF-1

RHD

F44

B61

RHD

RHD

F96

B255

F46

B108

RELAY

HOLDER

*1

*2

ABS RELAY

B225

B61

F44

2

1

3

4

B264

RHD

LHD

IGNITION

SWITCH

B200

F74

E

LHD

*3

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

ABSCM&H/U

E E


F46 B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F44

1 2 3 4

5 6 7 8

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

21 22 23

24 25 26

27

28

29

30

34 35 36

31 32 33

37

38

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

ABS00364

ABS(diag)-87


ABS (DIAGNOSTICS)

1

2

3

4

5

Step

CHECK MOTOR RELAY IN ABSCM&H/U.


H/U.


ABSCM&H/U terminals.

Terminals

No. 25 — No. 26:

Check


M

Ω?

Yes

Go to step 2.




NOTE:



(buzz) be heard when carrying out the sequence control?

Go to step 3.







2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 4.

Go to step 5.


NOTE:

Although the ABS warning light remains illuminating at this point, this is a normal condition.

Vehicle must be driven at approx.

12 km/h (7.46

MPH) or faster to turn off ABS warning light. Make sure that the ABS warning light goes off after driving vehicle.

ABS(diag)-88


ABS (DIAGNOSTICS)

AC:DTC 52 MOTOR MALFUNCTION

DIAGNOSIS:

• Faulty motor





WIRING DIAGRAM:

BATTERY

SBF-1

RHD

F44

B61

RHD

RHD

F96

B255

F46

B108

RELAY

HOLDER

*1

*2

ABS RELAY

B225

B61

F44

2

1

3

4

B264

RHD

LHD

IGNITION

SWITCH

B200

F74

E

LHD

*3

*1: LHD 5

RHD 3

*2: LHD 6

RHD 4

*3: LHD

B301

RHD

F49

E

ABSCM&H/U

E E


F46 B264

1 2

3 4

*3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

F44

1 2 3 4

5 6 7 8

B225

1 2

3 4

5 6

7 8

9

10

11 12 13

14 15 16

17

18

19

20

21 22 23

24 25 26

27

28

29

30

34 35 36

31 32 33

37

38

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

ABS00364

ABS(diag)-89


ABS (DIAGNOSTICS)

1

2

3

4

5

6

7

8

Step Check




H/U.





−−−−):


(

−−−−):

CHECK GROUND CIRCUIT OF MOTOR.









Ω?






(

−−−−):


(

−−−−):










Ω?

Yes

Go to step 2.

Go to step 3.

Go to step 4.

Go to step 5.




NOTE:



(buzz) be heard when carrying out the sequence control?

Go to step 6.

No

Repair the harness/connector between battery and ABSCM&H/U and check fuse

SBF8.

Repair the



ABSCM&H/U.

Repair the








2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Go to step 7.

Go to step 8.


ABS(diag)-90


ABS (DIAGNOSTICS)

AD:DTC 54 STOP LIGHT SWITCH SIGNAL CIRCUIT MALFUNCTION

DIAGNOSIS:

• Faulty stop light switch



WIRING DIAGRAM:

BATTERY

E

1

STOP LIGHT

SWITCH

2

1

B64

LHD RHD

B61

F44

LHD

*1 ABSCM&H/U

OC

1

2

WC

2

3

B64

:

OC

STOP LIGHT

SWITCH

B65

:

WC

OC

:

WITHOUT CRUISE

CONTROL

WC :

WITH CRUISE

CONTROL

*1: LHD

B301

RHD

F49

B64

1 2

B65

1 2

3 4

*1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

Step

CHECK OUTPUT OF STOP LIGHT SWITCH

USING SUBARU SELECT MONITOR.



2)Release the brake pedal.

3)Read the stop light switch output in Subaru

Select Monitor data display.

Check

Is the reading indicated on monitor display less than 1.5

V?

Yes

Go to step 2.

F44

1 2 3 4

5 6 7 8

ABS00479

No

Go to step 3.

ABS(diag)-91

3

4


ABS (DIAGNOSTICS)

2

5

6

7

Step

CHECK OUTPUT OF STOP LIGHT SWITCH


1)Depress the brake pedal.

2)Read the stop light switch output in Subaru


CHECK IF STOP LIGHTS COME ON.

Depress the brake pedal.

Check

Is the reading indicated on monitor display 10 — 15 V?

Do the stop lights turn on?

Yes

Go to step 5.

Go to step 4.

CHECK OPEN CIRCUIT IN HARNESS.



H/U.

3)Depress the brake pedal.




(

−−−−):


(

−−−−):


CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connector between stop light switch and ABSCM&H/U?



2)Erase the memory.


4)Read out the DTC.


Go to step 5.

Go to step 6.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Go to step 3.

Repair the stop lights circuit.

Repair the harness between stop light switch and

ABSCM&H/U connector.


Go to step 7.


ABS(diag)-92


ABS (DIAGNOSTICS)

AE:DTC 56 OPEN OR SHORT CIRCUIT IN G SENSOR CIRCUIT

DIAGNOSIS:

• Faulty G sensor output voltage



WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR

(LATERAL G SENSOR)

1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR

(EXCEPT STi MODEL) (STi MODEL)

ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-93

ABS00368


ABS (DIAGNOSTICS)

RHD MODEL

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00369

No

Go to step 5.

Step

CHECK OUTPUT OF G SENSOR USING

SUBARU SELECT MONITOR.



2)Read the G sensor output in Subaru Select

Monitor data display.

Check Yes

Is the G sensor output on monitor display 2.1 — 2.5 V when

G sensor is in horizontal position?

Go to step 2.

ABS(diag)-94

2

3

4

5

6

7

8

9

10


ABS (DIAGNOSTICS)

Step Check

CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connector between ABSCM&H/U and G sensor?


Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



CHECK INPUT VOLTAGE OF G SENSOR.


2)Remove the console box.

3)Remove the G sensor from vehicle. (Do not disconnect connector.)


5)Measure the voltage between G sensor connector terminals.


(B292) No. 1 (+) — No. 3 (

−−−−):

CHECK OPEN CIRCUIT IN G SENSOR OUT-

PUT HARNESS AND GROUND HARNESS.



H/U.




LHD: (B301) No. 6 — No. 28:

RHD: (F49) No. 6 — No. 28:

CHECK GROUND SHORT IN G SENSOR

OUTPUT HARNESS.

1)Disconnect the connector from G sensor.






Is the voltage 4.75 — 5.25 V?

Go to step 6.

Is the resistance 5.0 — 5.6 k

Ω?


M

Ω?

Go to step 7.

Go to step 8.

CHECK G SENSOR.

1)Connect the connector to G sensor.





(B292) No. 2 (+) — No. 3 (

−−−−):

CHECK G SENSOR.

Measure the voltage between G sensor connector terminals.


(B292) No. 2 (+) — No. 3 (

−−−−):

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):

Is the voltage 2.1 — 2.5 V when G sensor is in horizontal position?

Is the voltage 3.7 — 4.1 V when G sensor is inclined forwards to 90

°?

Is the voltage 0.5 — 0.9 V when G sensor is inclined backwards to 90

°?

Go to step 9.

Go to step 10.

Go to step 11.

No

Go to step 3.

Go to step 4.


Repair the harness/connector between G sensor and ABSCM&H/U.


Repair the harness between G sensor and

ABSCM&H/U.

Replace the G sensor. <Ref. to

ABS-21, G Sensor.>


ABS-21, G Sensor.>


ABS-21, G Sensor.>

ABS(diag)-95


ABS (DIAGNOSTICS)

11

12

13

Step Check



Is there poor contact in connector between ABSCM&H/U and G sensor?


Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Go to step 12.

Go to step 13.


ABS(diag)-96


ABS (DIAGNOSTICS)

AF:DTC 56 BATTERY SHORT IN G SENSOR CIRCUIT

DIAGNOSIS:




WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-97

ABS00368


ABS (DIAGNOSTICS)

RHD MODEL

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00369

No

Go to step 5.

Step





2)Read the G sensor output in Subaru Select

Monitor data display.

Check Yes


Go to step 2.

ABS(diag)-98

2

3

4

5

6

7

8

9

10

11


ABS (DIAGNOSTICS)

Step Check



Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



CHECK FREEZE FRAME DATA.

1)Select “Freeze frame data” on the Subaru

Select Monitor.

2)Read front right wheel speed on the Subaru

Select Monitor display.


Read front left wheel speed on the Subaru


Is the front right wheel speed on monitor display 0 km/h (0

MPH)?

Go to step 6.

Is the front left wheel speed on monitor display 0 km/h (0

MPH)?

Go to step 7.


Read rear right wheel speed on the Subaru



Read rear left wheel speed on the Subaru


Is the rear right wheel speed on monitor display 0 km/h (0

MPH)?

Is the rear left wheel speed on monitor display 0 km/h (0

MPH)?

Go to step 8.

Go to step 9.


Read G sensor output on the Subaru Select

Monitor display.





H/U.




LHD: (B301) No. 6 — No. 28:

RHD: (F49) No. 6 — No. 28:

Is the G sensor output on monitor display more than 3.65 V?


Ω?

Go to step 10.

Go to step 11.




3)Disconnect the connector from G sensor.


H/U.




(

−−−−):


(

−−−−):


Go to step 12.

No

Go to step 3.

Go to step 4.


Go to step 16.

Go to step 16.

Go to step 16.

Go to step 16.

Go to step 16.



ABSCM&H/U.

ABS(diag)-99


ABS (DIAGNOSTICS)

12

13

14

15

16

17

18

19

Step



2)Erase the memory.


4)Read out the DTC.

Check Yes






(

−−−−):


(

−−−−):



Go to step 13.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>




Go to step 17.

CHECK INPUT VOLTAGE OF G SENSOR.



3)Remove the G sensor from vehicle. (Do not disconnect connector.)




(B292) No. 1 (+) — No. 3 (

−−−−):





H/U.




LHD: (B301) No. 6 — No. 28:

RHD: (F49) No. 6 — No. 28:


Ω?

Go to step 18.

CHECK G SENSOR.






(B292) No. 2 (+) — No. 3 (

−−−−):

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):



°?

Go to step 19.

Go to step 20.

No


ABSCM&H/U.

Go to step 14.

Go to step 15.





ABS-21, G Sensor.>


ABS-21, G Sensor.>

ABS(diag)-100

21

22

20

23


ABS (DIAGNOSTICS)

Step Check

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):




°?




2)Erase the memory.


4)Read out the DTC.


Yes

Go to step 21.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No


ABS-21, G Sensor.>

Go to step 22.

Go to step 23.


ABS(diag)-101


ABS (DIAGNOSTICS)

AG:DTC 56 ABNORMAL G SENSOR HIGH

µµµµ OUTPUT

DIAGNOSIS:




WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-102

ABS00368

RHD MODEL


ABS (DIAGNOSTICS)

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00369

No

Go to step 6.

Step





2)Read G sensor output on the Subaru Select

Monitor display.

Check Yes


Go to step 2.

ABS(diag)-103


ABS (DIAGNOSTICS)

2

3

4

5

6

7

8

9

Step Check





Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Go to step 6.





H/U.




LHD: (B301) No. 6 — No. 28:

RHD: (F49) No. 6 — No. 28:


Ω?







M

Ω?

Go to step 7.

No

Go to step 3.

Go to step 4.




ABSCM only.

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>


ABS-21, G Sensor.>

CHECK G SENSOR.


2)Remove the G sensor from vehicle.






(B292) No. 2 (+) — No. 3 (

−−−−):

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):



°?


°?

Go to step 8.

Go to step 9.

Go to step 10.


ABS-21, G Sensor.>


ABS-21, G Sensor.>

ABS(diag)-104

10

11


ABS (DIAGNOSTICS)

Step




3)Erase the memory.


5)Read out the DTC.

Check


Yes

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Go to step 11.


ABS(diag)-105


ABS (DIAGNOSTICS)

AH:DTC 56 DETECTION OF G SENSOR STICK

DIAGNOSIS:




WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-106

ABS00368

RHD MODEL


ABS (DIAGNOSTICS)

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

Step

CHECK ALL FOUR WHEELS FOR FREE

TURNING.

ABS00369

Check

Have the wheels been turned freely such as when vehicle is lifted up, or operated on a rolling road?

Yes


DTC.

No

Go to step 2.

ABS(diag)-107


ABS (DIAGNOSTICS)

2

3

4

5

6

7

8

9

10

Step





2)Read the Subaru Select Monitor display.





3)Remove the G sensor from vehicle. (Do not disconnect the connector.)







Read the Subaru Select Monitor display.

Check Yes

Is the G sensor output on monitor display 2.1 — 2.5 V when the vehicle is in horizontal position?

Go to step 3.


°?


°?

Go to step 4.

Go to step 5.

No

Go to step 8.


ABS-21, G Sensor.>






2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>







H/U.




LHD: (B301) No. 6 — No. 28:

RHD: (F49) No. 6 — No. 28:


Ω?

Go to step 9.

CHECK G SENSOR.


2)Remove the G sensor from vehicle.






(B292) No. 2 (+) — No. 3 (

−−−−):

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):



°?

Go to step 10.

Go to step 11.


ABS-21, G Sensor.>

Go to step 6.

Go to step 7.




ABS-21, G Sensor.>


ABS-21, G Sensor.>

ABS(diag)-108

11

12

13


ABS (DIAGNOSTICS)

Step

CHECK G SENSOR.



(B292) No. 2 (+) — No. 3 (

−−−−):




3)Erase the memory.


5)Read out the DTC.

Check


°?


Yes

Go to step 12.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No


ABS-21, G Sensor.>

Go to step 13.


ABS(diag)-109


ABS (DIAGNOSTICS)

AI: DTC 73 OPEN OR SHORT CIRCUIT IN LATERAL G SENSOR CIRCUIT

DIAGNOSIS:

• Faulty Lateral G sensor output voltage



WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-110

ABS00368

RHD MODEL


ABS (DIAGNOSTICS)

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00369

No

Go to step 5.

Step

CHECK OUTPUT OF LATERAL G SENSOR




2)Read the lateral G sensor output in Subaru


Check Yes

Is the lateral G sensor output on monitor display 2.3 — 2.7 V when lateral G sensor is in horizontal position?

Go to step 2.

ABS(diag)-111


ABS (DIAGNOSTICS)

2

3

4

5

6

7

8

9

Step Check

CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in connector between ABSCM&H/U and lateral G sensor?


Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



CHECK INPUT VOLTAGE OF LATERAL G

SENSOR.



3)Remove the lateral G sensor from vehicle.

(Do not disconnect connector.)


5)Measure the voltage between lateral G sensor connector terminals.


(B257) No. 1 (+) — No. 3 (

−−−−):

CHECK OPEN CIRCUIT IN LATERAL G SEN-

SOR OUTPUT HARNESS AND GROUND

HARNESS.



H/U.




LHD: (B301) No. 28 — No. 30:

RHD: (F49) No. 28 — No. 30:


Go to step 6.


Ω?

Go to step 7.

CHECK GROUND SHORT IN LATERAL G

SENSOR OUTPUT HARNESS.

1)Disconnect the connector from lateral G sensor.







M

Ω?

Go to step 8.

CHECK LATERAL G SENSOR.

1)Connect the connector to lateral G sensor.





(B257) No. 2 (+) — No. 3 (

−−−−):


Measure the voltage between lateral G sensor connector terminals.


(B257) No. 2 (+) — No. 3 (

−−−−):

Is the voltage 2.1 — 2.5 V when lateral G sensor is in horizontal position?

Is the voltage 3.7 — 4.1 V when lateral G sensor is inclined right to 90

°?

Go to step 9.

Go to step 10.

No

Go to step 3.

Go to step 4.


Repair the harness/connector between lateral G sensor and

ABSCM&H/U.


ABSCM&H/U.

Repair the harness between lateral G sensor and

ABSCM&H/U.

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

ABS(diag)-112

11

12

10

13


ABS (DIAGNOSTICS)

Step Check




(B257) No. 2 (+) — No. 3 (

−−−−):



Is the voltage 0.5 — 0.9 V when lateral G sensor is inclined left to 90

°?

Is there poor contact in connector between ABSCM&H/U and lateral G sensor?



2)Erase the memory.


4)Read out the DTC.


Yes

Go to step 11.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Go to step 12.

Go to step 13.


ABS(diag)-113


ABS (DIAGNOSTICS)

AJ:DTC 73 BATTERY SHORT IN LATERAL G SENSOR CIRCUIT

DIAGNOSIS:




WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-114

ABS00368

RHD MODEL


ABS (DIAGNOSTICS)

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00369

No

Go to step 5.

Step





2)Read the lateral G sensor output in Subaru


Check Yes


Go to step 2.

ABS(diag)-115


ABS (DIAGNOSTICS)

2

3

4

5

6

7

8

9

10

11

Step Check



Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>




1)Select “Freeze frame data” on the Subaru

Select Monitor.

2)Read front right wheel speed on the Subaru



Read front left wheel speed on the Subaru


Is the front right wheel speed on monitor display 0 km/h (0

MPH)?

Go to step 6.

Is the front left wheel speed on monitor display 0 km/h (0

MPH)?

Go to step 7.


Read rear right wheel speed on the Subaru



Read rear left wheel speed on the Subaru


Is the rear right wheel speed on monitor display 0 km/h (0

MPH)?

Is the rear left wheel speed on monitor display 0 km/h (0

MPH)?

Go to step 8.

Go to step 9.

Go to step 10.


Read lateral G sensor output on the Subaru


Is the lateral G sensor output on monitor display more than

3.65 V?



HARNESS.



H/U.




LHD: (B301) No. 29 — No. 28:

RHD: (F49) No. 29 — No. 28:


Ω?

Go to step 11.




3)Disconnect the connector from lateral G sensor.


H/U.




−−−−):


(

−−−−):


Go to step 12.

No

Go to step 3.

Go to step 4.


Go to step 16.

Go to step 16.

Go to step 16.

Go to step 16.

Go to step 16.

Repair the harness/connector between Lateral G sensor and

ABSCM&H/U.


ABSCM&H/U.

ABS(diag)-116

13

14

15

16

12

17

18

19


ABS (DIAGNOSTICS)

Step



2)Erase the memory.


4)Read out the DTC.

Check Yes






−−−−):


(

−−−−):



Go to step 13.



Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



CHECK INPUT VOLTAGE OF LATERAL G

SENSOR.




(Do not disconnect connector.)




(B257) No. 1 (+) — No. 3 (

−−−−):



HARNESS.



H/U.




LHD: (B301) No. 29 — No. 28:

RHD: (F49) No. 29 — No. 28:


Go to step 17.


Ω?

Go to step 18.







(B257) No. 2 (+) — No. 3 (

−−−−):




(B257) No. 2 (+) — No. 3 (

−−−−):



°?

Go to step 19.

Go to step 20.

No


ABSCM&H/U.

Go to step 14.

Go to step 15.


Repair the harness/connector between Lateral G sensor and

ABSCM&H/U.


ABSCM&H/U.

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

ABS(diag)-117


ABS (DIAGNOSTICS)

20

21

22

23

Step Check




(B257) No. 2 (+) — No. 3 (

−−−−):




°?




2)Erase the memory.


4)Read out the DTC.


Yes

Go to step 21.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Go to step 22.

Go to step 23.


ABS(diag)-118


ABS (DIAGNOSTICS)

AK:DTC 73 ABNORMAL LATERAL G SENSOR HIGH

µµµµ OUTPUT

DIAGNOSIS:




WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-119

ABS00368


ABS (DIAGNOSTICS)

RHD MODEL

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS00369

No

Go to step 6.

Step Check





2)Read Lateral G sensor output on the Subaru


Is the voltage 2.3 — 2.7 V when Lateral G sensor is in horizontal position?

Yes

Go to step 2.

ABS(diag)-120

2

3

4

5

6

7

8

9


ABS (DIAGNOSTICS)

Step Check





Yes



2)Erase the memory.


4)Read out the DTC.


Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Go to step 6.



HARNESS.



H/U.




LHD: (B301) No. 29 — No. 28:

RHD: (F49) No. 29 — No. 28:


Ω?







M

Ω?

Go to step 7.

No

Go to step 3.

Go to step 4.



ABSCM&H/U.


ABSCM only.

Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>









(B257) No. 2 (+) — No. 3 (

−−−−):




(B257) No. 2 (+) — No. 3 (

−−−−):




(B257) No. 2 (+) — No. 3 (

−−−−):



°?


°?

Go to step 8.

Go to step 9.

Go to step 10.

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

ABS(diag)-121


ABS (DIAGNOSTICS)

10

11

Step




3)Erase the memory.


5)Read out the DTC.

Check


Yes

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Go to step 11.


ABS(diag)-122


ABS (DIAGNOSTICS)

AL:DTC 73 DETECTION OF LATERAL G SENSOR STICK

DIAGNOSIS:




WIRING DIAGRAM:

LHD MODEL

B301 ABSCM&H/U

SHIELD JOINT

CONNECTOR

5

7

6

B303

B292

B257

1 2 3

B257

JOINT CONNECTOR


1

2

3

4

5

6

B261

B293 B292

E

B261

ABS

G SENSOR

ABS

G SENSOR


ABS

LATERAL G

SENSOR

(STi MODEL)

1 2 3 4 5 6

B303

1 2 3 4

5 6 7 8

B301

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

ABS(diag)-123

ABS00368


ABS (DIAGNOSTICS)

RHD MODEL

F49

ABSCM&H/U

STi

STi

STi

STi

F49

F74

B200

SHIELD JOINT

CONNECTOR

5

6

7

F62

JOINT CONNECTOR


3

1

2

6

4

5

B261

1

B292 B257

B257

B292

1 2 3

F62

1 2 3 4

5 6 7 8

E

ABS

G SENSOR

ABS

LATERAL G

SENSOR

(STi MODEL)

F74

1 2 3 4 5

11 12

6 7 8 9 10

13 14 15 16 17 18 19 20 21 22

B261

1 2 3 4 5 6

F49

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22

27 28 29 30 31

23 24 25 26

Step

CHECK ALL FOUR WHEELS FOR FREE

TURNING.

ABS00369

Check

Have the wheels been turned freely such as when vehicle is lifted up, or operated on a rolling road?

Yes


DTC.

No

Go to step 2.

ABS(diag)-124

5

6

7

8

2

3

4

9

10


ABS (DIAGNOSTICS)

Step











(Do not disconnect the connector.)







Read the Subaru Select Monitor display.

Check

Is the lateral G sensor output on monitor display 2.3 — 2.7 V when the vehicle is in horizontal position?


°?

Yes

Go to step 3.

Go to step 4.

No

Go to step 8.

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>


°?

Go to step 5.






2)Erase the memory.


4)Read out the DTC.



Replace the

ABSCM&H/U.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



Go to step 9.



HARNESS.



H/U.




LHD: (B301) No. 29 — No. 28:

RHD: (F49) No. 29 — No. 28:


Ω?









(B257) No. 2 (+) — No. 3 (

−−−−):




(B257) No. 2 (+) — No. 3 (

−−−−):



°?

Go to step 10.

Go to step 11.

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Go to step 6.

Go to step 7.



ABSCM&H/U.

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

ABS(diag)-125


ABS (DIAGNOSTICS)

11

12

13

Step




(B257) No. 2 (+) — No. 3 (

−−−−):




3)Erase the memory.


5)Read out the DTC.

Check


°?


Yes

Go to step 12.

Replace the

ABSCM only.

<Ref. to ABS-6,


Control Unit

(ABSCM&H/U).>



No

Replace the lateral

G sensor. <Ref. to

ABS-23, Lateral G

Sensor.>

Go to step 13.


ABS(diag)-126

General Diagnostics Table

ABS (DIAGNOSTICS)

14.General Diagnostics Table

A: INSPECTION

Symptom

Vehicle instability during braking

Poor braking

Vibration and/or noise

(while driving on slippery roads)

Vehicle pulls to either side.

Vehicle spins.

Long braking/stopping distance

Wheel locks.

Brake dragging

Long brake pedal stroke

Vehicle pitching

Unstable or uneven braking

Excessive pedal vibration

Noise from ABSCM&H/U

Noise from front of vehicle

Noise from rear of vehicle

Probable faulty units/parts

• ABSCM&H/U (solenoid valve)

• ABS wheel speed sensor

• Brake (caliper & piston, pads)

• Wheel alignment

• Tire specifications, tire wear and air pressures

• Incorrect wiring or piping connections

• Road surface (uneven, camber)



• Brake (pads)




• Brake (pads)

• Air in brake line



• ABSCM&H/U (solenoid valve, motor)





• Master cylinder

• Brake (caliper & piston)

• Parking brake

• Axle & wheels

• Brake pedal play

• Air in brake line

• Brake pedal play

• Suspension play or fatigue (reduced damping)


• Road surface (uneven)



• Brake (caliper & piston, pads)






• ABSCM&H/U (mount bushing)


• Brake piping

• ABSCM&H/U (mount bushing)


• Master cylinder

• Brake (caliper & piston, pads, rotor)

• Brake piping

• Brake booster & check valve

• Suspension play or fatigue


• Brake (caliper & piston, pads, rotor)

• Parking brake

• Brake piping

• Suspension play or fatigue

ABS(diag)-127

ABS (DIAGNOSTICS)

General Diagnostics Table

ABS(diag)-128

SUBARU Impreza 2004 vehicle Service manual

Assistant Bot

ABS (DIAGNOSTICS)

ABS(diag)

1. Basic Diagnostic Procedure

2. Check List for Interview

3. General Description

4. Electrical Components Location

5. Control Module I/O Signal

6. Subaru Select Monitor

7. Read Diagnostic Trouble

Code (DTC)

8. Inspection Mode

9. Clear Memory Mode

10.ABS Warning Light/Brake Warning Light Illumination Pattern

11.List of Diagnostic Trouble Code (DTC)

12.Diagnostics Procedure without Diagnostic Trouble Code (DTC)

13.Diagnostics Procedure with Diagnostic Trouble Code (DTC)

14.General Diagnostics Table

Key Features

Frequently Answers and Questions

What type of procedures are included in this manual?

What is the purpose of this manual?

Who is this manual intended for?

What is the recommended parts to use when repairing a SUBARU vehicle?

Related manuals

Table of contents

SUBARU Impreza 2004 vehicle Service manual

Assistant Bot

ABS (DIAGNOSTICS)

ABS(diag)

1. Basic Diagnostic Procedure

2. Check List for Interview

3. General Description

4. Electrical Components Location

5. Control Module I/O Signal

6. Subaru Select Monitor

7. Read Diagnostic Trouble

Code (DTC)

8. Inspection Mode

9. Clear Memory Mode

10.ABS Warning Light/Brake Warning Light Illumination Pattern

11.List of Diagnostic Trouble Code (DTC)

12.Diagnostics Procedure without Diagnostic Trouble Code (DTC)

13.Diagnostics Procedure with Diagnostic Trouble Code (DTC)

14.General Diagnostics Table

Key Features

Frequently Answers and Questions

What type of procedures are included in this manual?

What is the purpose of this manual?

Who is this manual intended for?

What is the recommended parts to use when repairing a SUBARU vehicle?

Related manuals

Subaru

Forester

Subaru

2009 Impreza

Subaru

LEGACY

Subaru

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Subaru

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Subaru

Impreza

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Table of contents