Subaru 2001 IMPREZA Manual de usuario

FUJI HEAVY INDUSTRIES LTD. G1830GE5

2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX

CHASSIS SECTION

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, reas-

sembling, inspection and adjustment of

components and diagnostics for guid-

ance 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.

All information, illustration and specifi-

cations contained in this manual are

based on the latest product information

available at the time of publication

approval.

FRONT SUSPENSION FS

REAR SUSPENSION RS

WHEEL AND TIRE SYSTEM WT

DIFFERENTIALS DI

TRANSFER CASE TC

DRIVE SHAFT SYSTEM DS

ABS ABS

ABS (DIAGNOSTICS) ABS

BRAKE BR

PARKING BRAKE PB

POWER ASSISTED SYSTEM

(POWER STEERING) PS

ABS (DIAGNOSTICS) ABS

Page

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

2. Check List for Interview...............................................................................6

3. General Description ....................................................................................9

4. Electrical Components Location................................................................12

5. Control Module I/O Signal.........................................................................14

6. Subaru Select Monitor...............................................................................18

7. Read Diagnostic Trouble Code.................................................................20

8. Inspection Mode........................................................................................21

9. Clear Memory Mode..................................................................................22

10. ABS Warning Light Illumination Pattern....................................................23

11. List of Diagnostics Trouble Code..............................................................24

12. Diagnostics Chart with Diagnosis Connector............................................28

13. Diagnostics Chart with Subaru Select Monitor..........................................96

14. General Diagnostics Table......................................................................186

ABS-2

ABS (DIAGNOSTICS) BASIC DIAGNOSTIC PROCEDURE

1. Basic Diagnostic Procedure

A: PROCEDURE

1. WITHOUT SUBARU SELECT MONITOR

CAUTION:

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

lation.

NOTE:

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

•When ABS warning light illuminates, read and record trouble code indicated by ABS warning light.

Step Check Yes No

1 CHECK PRE-INSPECTION.

1)Ask the customer when and how the trouble

occurred using interview checklist. <Ref. to

ABS-6, Check List for Interview.>

2)Before performing diagnosis, inspect unit

which might influence the ABS problem. <Ref.

to ABS-9, INSPECTION, General Descrip-

tion.>

Is unit that might influence the

ABS problem normal? Go to step 2. Repair or replace

each unit.

2 CHECK INDICATION OF TROUBLE CODE.

Calling up trouble code. <Ref. to ABS-20,

Read Diagnostic Trouble Code.>

Is trouble code readable? Go to step 3. Inspect using diag-

nostic chart for

ABS warning light

failure.<Ref. to

ABS-28, Diagnos-

tics Chart with

Diagnosis Con-

nector.>

NOTE:

Call up trouble

code again after in-

specting ABS

warning light.

<Ref. to ABS-20,

Read Diagnostic

Trouble Code.>

3 CHECK TROUBLE CODE.

NOTE:

Record all trouble codes.

Is only the start code issued? Go to step 4. Go to step 5.

4 PERFORM THE GENERAL DIAGNOSTICS.

1)Inspect using “General Diagnostics Table”.

<Ref. to ABS-186, General Diagnostics Table.>

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

ABS-22, WITHOUT SUBARU SELECT MONI-

TOR, OPERATION, Clear Memory Mode.>

3)Perform the inspection mode. <Ref. to ABS-

21, Inspection Mode.>

Calling up the trouble code. <Ref. to ABS-20,

Read Diagnostic Trouble Code.>

Is only the start code issued? Complete the

diagnosis. Go to step 5.

ABS-3

ABS (DIAGNOSTICS)

BASIC DIAGNOSTIC PROCEDURE

5 PERFORM THE DIAGNOSIS.

1)Inspect using “Diagnostics Chart with Diag-

nostic Connector”.<Ref. to ABS-28, Diagnos-

tics Chart with Diagnosis Connector.>

NOTE:

Fortroublecode list,referto “List of Diagnostics

Trouble Code”.<Ref. to ABS-24, WITHOUT

SUBARU SELECT MONITOR, LIST, List of Di-

agnostics Trouble Code.>

2)Repair trouble cause.

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

ABS-22, WITHOUT SUBARU SELECT MONI-

TOR, OPERATION, Clear Memory Mode.>

4)Perform the inspection mode. <Ref. to ABS-

21, Inspection Mode.>

5)Calling up the trouble code. <Ref. to ABS-20,

Read Diagnostic Trouble Code.>

Is only the start code issued? Complete the

diagnosis. Inspect using

“DiagnosticsChart

with Diagnostic

Connector”. <Ref.

to ABS-28, Diag-

nostics Chart with

Diagnosis Con-

nector.>

Step Check Yes No

ABS-4

ABS (DIAGNOSTICS) BASIC DIAGNOSTIC PROCEDURE

2. WITH SUBARU SELECT MONITOR

CAUTION:

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

lation.

NOTE:

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

•Check list for interview. <Ref. to ABS-26, WITH SUBARU SELECT MONITOR, LIST, List of Diagnostics

Trouble Code.>

Step Check Yes No

1 CHECK PRE-INSPECTION.

1)Ask the customer when and how the trouble

occurred using interview checklist. <Ref. to

ABS-6, Check List for Interview.>

2)Before performing diagnosis, inspect unit

which might influence the ABS problem. <Ref.

to ABS-9, INSPECTION, General Descrip-

tion.>

Is unit that might influence the

ABS problem normal? Go to step 2. Repair or replace

each unit.

2 CHECK INDICATION OF TROUBLE CODE

DISPLAY.

1)Turn ignition switch to OFF.

2)Connect the SUBARU SELECT MONITOR

to data link connector.

3)Turn ignition switch to ON and SUBARU

SELECT MONITOR to ON.

NOTE:

If the communication function of the select

monitor cannot be executed normally, check

the communication circuit. <Ref. to ABS-96,

COMMUNICATION FOR INITIALIZING IM-

POSSIBLE, Diagnostics Chart with Subaru Se-

lect Monitor.>

4)Read diagnostic trouble code. <Ref. to ABS-

19, READ CURRENT DATA, OPERATION,

Subaru Select Monitor.>

5)Record all trouble codes and frame data.

Is the corresponding trouble

encoding? Go to step 3. Go to step 4.

3 PERFORM THE GENERAL DIAGNOSTICS.

1)Inspect using “General Diagnostics Table”.

<Ref. to ABS-186, General Diagnostics Table.>

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

ABS-19, CLEAR MEMORY MODE, OPERA-

TION, Subaru Select Monitor.>

3)Perform the inspection mode. <Ref. to ABS-

21, Inspection Mode.>

4)Calling up the trouble code. <Ref. to ABS-18,

READ DIAGNOSTIC TROUBLE CODE,

OPERATION, Subaru Select Monitor.>

Is no trouble code designated

and ABS warning light goes

out after turning on?

Complete the

diagnosis. Go to step 4.

ABS-5

ABS (DIAGNOSTICS)

BASIC DIAGNOSTIC PROCEDURE

4 PERFORM THE DIAGNOSIS.

1)Inspect using “Diagnostics Chart with

Subaru Select Monitor”.<Ref. to ABS-96, Diag-

nostics Chart with Subaru Select Monitor.>

NOTE:

Fortroublecode list,referto “List of Diagnostics

Trouble Code”.<Ref. to ABS-24, WITHOUT

SUBARU SELECT MONITOR, LIST, List of Di-

agnostics Trouble Code.>

2)Repair trouble cause.

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

ABS-19, CLEAR MEMORY MODE, OPERA-

TION, Subaru Select Monitor.>

4)Perform the inspection mode. <Ref. to ABS-

21, Inspection Mode.>

5)Calling up the trouble code. <Ref. to ABS-18,

READ DIAGNOSTIC TROUBLE CODE,

OPERATION, Subaru Select Monitor.>

Is no trouble code designated

and does ABS warning light go

out after turning on?

Complete the

diagnosis. Inspect using

“DiagnosticsChart

withSubaruSelect

Monitor”. <Ref. to

ABS-96, Diagnos-

tics Chart with

Subaru Select

Monitor.>

Step Check Yes No

ABS-6

ABS (DIAGNOSTICS) CHECK LIST FOR INTERVIEW

2. Check List for Interview

A: CHECK

Check the following items about the vehicle's state.

1. STATE OF ABS WARNING LIGHT

2. SYMPTOMS

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 km/h to km/h

MPH to MPH

❏While traveling at a constant speed km/h MPH

❏When decelerating km/h to km/h

MPH to MPH

❏When turning to right Steering angle : deg

Steering time : sec

❏When turning to left Steering angle : deg

Steering time : sec

❏When moving other electrical parts

•Parts name :

•Operating condition :

ABS operating condi-

tion ❏Performs no work.

❏Operates only when abruptly applying brakes. Vehicle speed : km/h

MPH

•How to step on brake pedal :

a) Operating time : sec

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 :

ABS-7

ABS (DIAGNOSTICS)

CHECK LIST FOR INTERVIEW

3. CONDITIONS UNDER WHICH TROUBLE OCCURS

Behavior of vehicle a) Directional stability cannot be obtained or steering arm 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 arm refuses to work when accelerating :

❏Yes / ❏No

•When : ❏Vehicle turns to right

❏Vehicle turns to left

❏Spins

❏Others :

c) Brakes are 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 :

Environment a) Weather ❏Fine

❏Cloudy

❏Rainy

❏Snowy

❏Various/Others :

b) Ambient temperature °F (°C)

c) Road ❏Urban area

❏Suburbs

❏Highway

❏General road

❏Ascending slope

❏Descending slope

❏Paved road

❏Gravel road

❏Muddy road

❏Sandy place

❏Others :

d) Road surface ❏Dry

❏Wet

❏New-fallen snow

❏Compressed snow

❏Frozen slope

❏Others :

ABS-8

ABS (DIAGNOSTICS) CHECK LIST FOR INTERVIEW

Condition a) Brakes Deceleration : g

❏Continuous / ❏Intermittent

b) Accelerator Acceleration : g

❏Continuous / ❏Intermittent

c) Vehicle speed km/h MPH

❏Advancing

❏Accelerating

❏Reducing speed

❏Low speed

❏Turning

❏Others :

d) Tire inflation pressure Front RH tire : kPa

Front LH tire : kPa

Rear RH tire : kPa

Rear LH tire : kPa

e) Degree of wear Front RH tire :

Front LH tire :

Rear RH tire :

Rear LH tire :

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-9

ABS (DIAGNOSTICS)

GENERAL DESCRIPTION

3. General Description

A: CAUTION

1. SUPPLEMENTAL RESTRAINT SYSTEM

“AIRBAG”

Airbag system wiring harness is routed near the

ABS sensor, ABS control module and hydraulic

control unit.

CAUTION:

•All Airbag system wiring harness and con-

nectors are colored yellow. Do not use electri-

cal test equipment on these circuit.

•Be careful not to damage Airbag system wir-

ing harness when servicing the ABS 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 battery voltage and specific gravity of

electrolyte.

Standard voltage: 12 V, or more

Specific gravity: Above 1.260

2. BRAKE FLUID

1) Check brake fluid level.

2) Check brake fluid leakage.

3. HYDRAULIC UNIT

Check the hydraulic unit.

•With brake tester <Ref. to ABS-9, 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-8, 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 brake drag.

5. BRAKE PAD AND ROTOR

Check brake pad and rotor.

•Front <Ref. to BR-24, INSPECTION, Front

Brake Pad.> and <Ref. to BR-27, INSPECTION,

Front Disc Rotor.>

•Rear <Ref. to BR-35, INSPECTION, Rear

Brake Pad.> and <Ref. to BR-38, INSPECTION,

Rear Disc Rotor.> or <Ref. to BR-45, INSPEC-

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

47, INSPECTION, Rear Drum Brake Drum.>

6. TIRE

Check tire specifications, tire wear and air pres-

sure. <Ref. to WT-2, SPECIFICATIONS, General

Description.>

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