Mitsubishi Galant 9G. Manual — part 402

NOTES

35A-1

GROUP 35A

BASIC BRAKE

SYSTEM

CONTENTS

GENERAL DESCRIPTION. . . . . . . . .

35A-2

BASIC BRAKE SYSTEM DIAGNOSIS

35A-3

INTRODUCTION TO BASIC BRAKE
SYSTEM DIAGNOSIS . . . . . . . . . . . . . . . .

35A-3

BASIC BRAKE SYSTEM DIAGNOSTIC
TROUBLESHOOTING STRATEGY . . . . . .

35A-3

SYMPTOM CHART. . . . . . . . . . . . . . . . . . .

35A-3

SYMPTOM PROCEDURES . . . . . . . . . . . .

35A-4

SPECIAL TOOLS. . . . . . . . . . . . . . . .

35A-12

ON-VEHICLE SERVICE. . . . . . . . . . .

35A-13

BRAKE PEDAL CHECK AND
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . .

35A-13

BRAKE BOOSTER OPERATING TEST. . .

35A-14

CHECK VALVE OPERATION CHECK . . . .

35A-15

PROPORTIONING VALVE FUNCTION TEST
<VEHICLES WITHOUT ABS> . . . . . . . . . .

35A-16

BLEEDING . . . . . . . . . . . . . . . . . . . . . . . . .

35A-16

BRAKE FLUID LEVEL SENSOR CHECK. .

35A-18

DISC BRAKE PAD CHECK AND
REPLACEMENT. . . . . . . . . . . . . . . . . . . . .

35A-18

DISC BRAKE ROTOR CHECK. . . . . . . . . .

35A-20

MASTER CYLINDER FUNCTION CHECK.

35A-23

BRAKE PEDAL. . . . . . . . . . . . . . . . . .

35A-24

REMOVAL AND INSTALLATION . . . . . . . .

35A-24

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

35A-25

MASTER CYLINDER ASSEMBLY
AND BRAKE BOOSTER . . . . . . . . . .

35A-26

REMOVAL AND INSTALLATION . . . . . . . .

35A-26

MASTER CYLINDER . . . . . . . . . . . . . . . . .

35A-29

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

35A-29

DISC BRAKE ASSEMBLY . . . . . . . . .

35A-30

REMOVAL AND INSTALLATION . . . . . . . .

35A-30

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

35A-32

DISASSEMBLY AND ASSEMBLY
<FRONT> . . . . . . . . . . . . . . . . . . . . . . . . . .

35A-33

DISASSEMBLY AND ASSEMBLY <REAR>

35A-36

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .

35A-38

SPECIFICATIONS . . . . . . . . . . . . . . .

35A-40

FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . .

35A-40

GENERAL SPECIFICATIONS . . . . . . . . . .

35A-40

SERVICE SPECIFICATIONS . . . . . . . . . . .

35A-41

LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . .

35A-41

GENERAL DESCRIPTION

TSB Revision

BASIC BRAKE SYSTEM

35A-2

GENERAL DESCRIPTION

M1351000100440

The brake system has been designed to give greater
reliability and durability and to provide excellent brak-
ing performance.

FEATURES

.

Improved braking performance

1. An 8+9 inch tandem brake booster provides suffi-

cient braking force in sudden braking range.

2. 15-inch front ventilated disc brakes provide stable

braking force and improved braking feel. <2.4L
engine>

3. 16-inch front ventilated disc brakes provide stable

braking force and improved braking feel. <3.8L
engine>

4. 14-inch rear solid disc brakes are used.

.

Improved stability

1. A 4-wheel anti-lock braking system (4ABS) pre-

vents slipping caused by the vehicle wheels lock-
ing up, in order to maintain a stable vehicle
posture and steering performance.

2. An electronic brake-force distribution (EBD)

makes it possible to maintain the maximum
amount of braking force even when the vehicle's
load is unevenly distributed. <Vehicles with ABS>

3. A rear wheel early lock-prevention proportioning

valve are used. <Vehicles without ABS>

4. Front- and rear-wheel X-type brake line layout

are used.

5. Ventilated discs on the front brakes improve

anti-fading performance.

.

Improved serviceability

1. A diagnosis function for the ABS system makes

inspection easier.

2. An outer disc separated hub and rotor make

removal and installation easier.

3. The master cylinder reservoir tank cap is colored

white to make identification easier.

4. The ABS-ECU and hydraulic unit are integrated

to make them more compact and light weight.

CONSTRUCTION DIAGRAM

AC305395

BRAKE BOOSTER

HYDRAULIC UNIT
(INTEGRATED WITH
THE ABS-ECU)

MASTER CYLINDER

FRONT DISC BRAKE

REAR DISC BRAKE

AB

<VEHICLE WITH ABS>

BASIC BRAKE SYSTEM DIAGNOSIS

TSB Revision

BASIC BRAKE SYSTEM

35A-3

BASIC BRAKE SYSTEM DIAGNOSIS

INTRODUCTION TO BASIC BRAKE SYSTEM DIAGNOSIS

M1351009700319

Hydraulic brakes are composed of the brake pedal,
master cylinder, brake booster and disc brakes. Mal-
functions such as insufficient braking power or the
generation of noise may occur due to wear, damage
or incorrect adjustment of these components.

BASIC BRAKE SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1351009800316

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
basic brake system fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the symptom

chart.

4. Verify malfunction is eliminated.

SYMPTOM CHART

M1351009900324

AC305394

BRAKE BOOSTER

MASTER CYLINDER AND
PROPORTIONING VALVES

FRONT DISC BRAKE

REAR DISC BRAKE

AB

<VEHICLE WITHOUT ABS>

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE
PAGE

Vehicle pulls to one side when brakes are applied

1

P.35A-4

Insufficient braking power

2

P.35A-4

Increased pedal stroke (Reduced pedal-to-floor board clearance) 3

P.35A-5

Brake drag

4

P.35A-6

Scraping or grinding noise when brake are applied

5

P.35A-7

Squealing, groaning or chattering noise when brake are applied

6

P.35A-8

Squealing noise when brakes are not applied

7

P.35A-9

Groaning, clicking or rattling noise when brakes are not applied

8

P.35A-11