Subaru Impreza 2004 Bedienungsanleitung

FUJI HEAVY INDUSTRIES LTD. G1870GE5

2004 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(diag)

BRAKE BR

PARKING BRAKE PB

POWER ASSISTED SYSTEM

(POWER STEERING) PS

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

ABS(diag)-2

ABS (DIAGNOSTICS)

Basic Diagnostic Procedure

1. Basic Diagnostic Procedure

A: PROCEDURE

CAUTION:

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

lation.

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.>

Step Check Yes No

1 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?

Go to step 2. Repair or replace

each unit.

2 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.

TE:

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 Diag-

nostic Trouble Code (DTC).>

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

READ CURRENT DATA, OPERATION, Sub-

aru Select Monitor.>

5)Record all DTCs and freeze frame data.

Is the DTC displayed? Go to step 4. Go to step 3.

3 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),

OPERATION, Subaru Select Monitor.>

Check DTC is not displayed.

Is the ABS warning light turned

off after ignition switch OFF?

Complete the

diagnosis.

Inspect using

“diagnostics pro-

cedure for No

DTC”. <Ref. to

ABS(diag)-40, NO

DTC.>

ABS(diag)-3

ABS (DIAGNOSTICS)

Basic Diagnostic Procedure

4 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,

OPERATION, Subaru Select Monitor.>

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),

OPERATION, Subaru Select Monitor.>

Are the DTCs indicated on dis-

play?

Inspect using

“diagnostics pro-

cedure with Sub-

aru Select

Monitor”. <Ref. to

ABS(diag)-37,

Diagnostics Proce-

dure with Diagnos-

tic Trouble Code

(DTC).>

Complete the

diagnosis.

Step Check Yes No

ABS(diag)-4

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

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(diag)-5

ABS (DIAGNOSTICS)

Check List for Interview

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 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 operating other electrical parts

•Parts name :

•Operating condition :

ABS(diag)-6

ABS (DIAGNOSTICS)

Check List for Interview

3. SYMPTOMS

ABS operating condi-

tion

❏Does not operate.

❏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 :

Behavior of vehicle 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 :

ABS(diag)-7

ABS (DIAGNOSTICS)

Check List for Interview

4. CONDITIONS UNDER WHICH TROUBLE OCCURS

Environment a) Weather ❏Fine

❏Cloudy

❏Rainy

❏Snowy

❏Various/Others :

b) Ambient temperature °C (°F)

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 :

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(diag)-8

ABS (DIAGNOSTICS)

General Description

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 con-

nectors are colored yellow. Do not use electri-

cal 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 hydrau-

lic 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 pres-

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

Description.>

ABS(diag)-9

ABS (DIAGNOSTICS)

General Description

C: PREPARATION TOOL

1. SPECIAL TOOLS

2. GENERAL PURPOSE TOOLS

ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS

24082AA230 CARTRIDGE Troubleshooting for electrical systems.

22771AA030 SUBARU SELECT

MONITOR KIT

Troubleshooting for electrical systems.

TOOL NAME REMARKS

Circuit tester Used for measuring resistance, voltage and amperage.

Oscilloscope Used for measuring sensor.

ST24082AA230

ST22771AA030

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