Skoda Octavia II 2004 Instruction manual

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Workshop Manual
Octavia II 2004 ➤
Octavia II 2010 ➤
Brake systems
Edition 11.2017
Service
Service Department. Technical Information

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
List of Workshop Manual Repair Groups
Repair Group
00 - Technical data
45 - Anti-lock brake system
46 - Brakes - mechanism
47 - Brakes - hydraulics
Technical information should always be available to the foremen and mechanics, because their
careful and constant adherence to the instructions is essential to ensure vehicle road-worthiness and
safety. In addition, the normal basic safety precautions for working on motor vehicles must, as a
matter of course, be observed.
Service
All rights reserved.
No reproduction without prior agreement from publisher.
Copyright © 2017 ŠKODA AUTO a. s. D3E8038D0B4

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Contents
00 - Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Brake variants and their assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Brake inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
45 - Anti-lock brake system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1 Antilock braking system (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.1 General instructions for ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2 Distinguishing features of the ABS systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.3 Safety precautions, basic information on fault finding and on repairing . . . . . . . . . . . . . . . . 14
1.4 Required technical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2 Electrical/electronic components and fitting locations ABS Mark 70 (ABS/TCS) . . . . . . . . 15
2.1 Electrical/electronic components and fitting locations ABS Mark 70 (ABS/TCS) for vehicles
up to MY 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 Electrical/electronic components and fitting locations ABS Mark 70 (ABS/TCS) for vehicles
as of MY 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3 Electrical/electronic components and fitting locations ABS Mark 70 (ABS/TCS) for vehicles
as of MY 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3 Electrical/electronic components and fitting locations ABS Mark 60/Mark 60 EC (ABS/EDL/
TCS/ESP (ESC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 Electrical/electronic components and fitting locations ABS Mark 60 for vehicles up to MY
2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2 Electrical/electronic components and fitting locations Mark 60 EC for vehicles as of MY
2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3 Electrical/electronic components and fitting locations ABS Mark 60 EC/PYA for vehicles as
of MY 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4 Indication of faults by means of warning lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1 Warning lights - for vehicles up to MY 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Warning lights - for vehicles as of MY 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.3 Warning lights - for vehicles as of MY 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5 Hydraulic Control Unit, Brake Servo Unit/Master Brake Cylinder ABS Mark 70 (ABS/TCS)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.1 Summary of components - left-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.2 Connect the brake lines from the master brake cylinder to the hydraulic unit - left-hand
drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.3 Removing and installing ABS control unit J104 ABS hydraulic unit N55 - left -hand drive
vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.4 Disconnecting control unit from hydraulic unit - Left-hand drive . . . . . . . . . . . . . . . . . . . . . . 51
5.5 Attaching control unit to hydraulic unit - Left-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5.6 Summary of components - right-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.7 Connecting the brake lines from the master brake cylinder to the hydraulic unit - right-hand
drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.8 Removing and installing ABS control unit J104 / ABS hydraulic unit N55 - right-hand drive
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.9 Separating the control unit from the hydraulic unit - Right-hand drive . . . . . . . . . . . . . . . . 59
5.10 Attaching control unit to hydraulic unit - Right-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . 60
6 Hydraulic control unit, brake servo unit/master brake cylinder ABS Mark 60/Mark 60 EC (ABS/
EDL/TCS/ESP (ESC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.1 Summary of components ABS Mark 60 - for left-hand drive up to MY 2008 . . . . . . . . . . . . 61
6.2 Summary of components ABS Mark 60 EC - for left-hand drive as of MY 2009 . . . . . . . . 64
6.3 Connecting the brake lines from the master brake cylinder to the ABS hydraulic unit - left-
hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6.4 Removing and installing ABS control unit J104 ABS hydraulic unit N55 - left -hand drive
vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
Contents i

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
6.5 Disconnecting control unit from hydraulic unit - Left-hand drive . . . . . . . . . . . . . . . . . . . . . . 72
6.6 Attaching control unit to hydraulic unit - Left-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.7 Summary of components ABS Mark 60 EC (ABS/EDL/TCS/ESP) - right-hand drive . . . . 73
6.8 Connecting the brake lines from the master brake cylinder to the ABS hydraulic unit - right-
hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.9 Removing and installing ABS control unit J104 / ABS hydraulic unit N55 - right-hand drive
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.10 Separating the control unit from the hydraulic unit - Right-hand drive . . . . . . . . . . . . . . . . 79
6.11 Attaching control unit to hydraulic unit - Right-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7 Removing and Installing parts of the ABS System on the front and rear axle . . . . . . . . . . 82
7.1 Removing and installing parts of the ABS system on the front axle . . . . . . . . . . . . . . . . . . 82
7.2 Removing and installing parts of the ABS system on the rear axle (front-wheel drive) . . . . 85
7.3 Removing and installing parts of the ABS system on the rear axle (four-wheel drive) . . . . 88
8 Removing and installing parts of the ESP (ESC) system . . . . . . . . . . . . . . . . . . . . . . . . . . 91
8.1 Removing and installing sensor unit for ESP (ESC) G419 . . . . . . . . . . . . . . . . . . . . . . . . 91
8.2 Removing and installing steering angle sender G85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
46 - Brakes - mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
1 Repairing front wheel brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
1.1 Changing the brake pads of the front brake - Mounting instructions . . . . . . . . . . . . . . . . . . 94
1.2 Repairing front wheel brake, floating caliper disc brake FS-IIl . . . . . . . . . . . . . . . . . . . . . . 95
1.3 Removing and installing brake pads, floating caliper disc brake FS-III . . . . . . . . . . . . . . . . 96
1.4 Removing and installing brake caliper, floating caliper disc brake FS-III . . . . . . . . . . . . . . 100
1.5 Repairing front wheel brake, brake caliper FN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
1.6 Removing and installing brake pads, brake calliper FN3 . . . . . . . . . . . . . . . . . . . . . . . . . . 104
1.7 Removing and installing brake caliper, brake caliper FN3 . . . . . . . . . . . . . . . . . . . . . . . . . . 108
2 Repairing rear brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
2.1 Changing the brake pads of the rear brake - Mounting instructions . . . . . . . . . . . . . . . . . . 111
2.2 Repairing rear brake CII 41 (vehicles with front and four-wheel drive) . . . . . . . . . . . . . . . . 112
2.3 Removing and installing brake pads CII 41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
2.4 Removing and installing brake caliper CII 41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
2.5 Repairing rear brake CI 38 (vehicles with front-wheel drive) . . . . . . . . . . . . . . . . . . . . . . . . 119
2.6 Removing and installing brake pads CI 38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
2.7 Removing and installing brake caliper CI 38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
2.8 Repairing rear brake Bosch BIRIII (vehicles with front and four-wheel drive) . . . . . . . . . . 125
2.9 Removing and installing brake pads Bosch BIRIII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
2.10 Removing and installing brake caliper Bosch BIRIII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
3 Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
3.1 Handbrake lever - Summary of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
3.2 Setting the hand-brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
3.3 Removing and installing the hand-brake cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4 Brake pedal - left-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
4.1 Summary of components of brake pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
4.2 Separating the brake pedal from the brake servo unit and clipping onto brake servo unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
4.3 Removing and installing brake pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
4.4 Removing and installing bearing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
4.5 Setting, removing and installing the brake light switch F and brake pedal switch F47 up to
MY 10.2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
4.6 Removing and installing brake light switch F and brake pedal switch F47 as of 11/2005 . . 139
5 Brake pedal - right-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5.1 Summary of components of brake pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5.2 Separating the brake pedal from the brake servo unit and clipping onto brake servo unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
5.3 Removing and installing brake pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
5.4 Removing and installing bearing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
ii Contents

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
5.5 Setting, removing and installing the brake light switch F and brake pedal switch F47 up to
MY 10.2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
5.6 Removing and installing brake light switch F and brake pedal switch F47 as of 11/2005 . . 149
47 - Brakes - hydraulics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1 Repairing front brake caliper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1.1 Repairing the brake caliper FS-III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
1.2 Removing and installing the piston of the brake caliper of the FS-III brake . . . . . . . . . . . . 154
1.3 Repairing brake caliper FN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
1.4 Removing and installing piston of brake caliper FN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
2 Repairing rear brake caliper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
2.1 Repairing brake caliper CII 41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
2.2 Repairing brake caliper CI 38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
2.3 Removing and installing the brake caliper piston CII 41 or CI 38 . . . . . . . . . . . . . . . . . . . . 162
2.4 Repairing the brake caliper Bosch BIRIII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
2.5 Removing and installing the brake caliper piston Bosch BIRIII . . . . . . . . . . . . . . . . . . . . . . 164
2.6 Pre-bleeding the brake caliper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
3 Checking the master brake cylinder for tightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
4 Bleeding brake system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
4.1 Bleeding the brake system of air with the brake filling and bleeding device . . . . . . . . . . . . 168
4.2 Bleeding the brake system of air without using the brake filling and bleeding device . . . . 171
4.3 Change brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
5 Summary of Components: brake servo unit/master brake cylinder . . . . . . . . . . . . . . . . . . 173
5.1 Summary of components - left-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
5.2 Summary of components - right-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
5.3 Fitting position of the cap from the brake fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5.4 Vacuum pump for brake servo unit (vehicles with diesel engines) . . . . . . . . . . . . . . . . . . . . 178
5.5 Brake vacuum pump V192 (vehicles with petrol engines) . . . . . . . . . . . . . . . . . . . . . . . . . . 178
5.6 Checking the non-return valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5.7 Checking vacuum system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
5.8 Removing and installing the pressure sensor for the brake servo unit G294 . . . . . . . . . . 185
6 Master brake cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
6.1 Removing and installing master brake cylinder - left-hand drive . . . . . . . . . . . . . . . . . . . . 186
6.2 Removing and installing master brake cylinder - right-hand drive . . . . . . . . . . . . . . . . . . . . 189
7 Brake servo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
7.1 Check function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
7.2 Removing and installing brake servo unit - left-hand drive . . . . . . . . . . . . . . . . . . . . . . . . . . 192
7.3 Removing and installing brake servo unit - right-hand drive . . . . . . . . . . . . . . . . . . . . . . . . 195
8 Brake line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
8.1 Repairing brake lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
8.2 Flaring tool - summary of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
8.3 Work instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
Contents iii

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
iv Contents

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
00 – Technical data
1 Brakes
(SRL001140; Edition 11.2017)
Brake variants and their assignment ⇒ page 1
Brake fluid ⇒ page 8
Brake inspection ⇒ page 8
1.1 Brake variants and their assignment
Engine 1.2 l/77 kW 1.4 l/55 kW 1.4 l/59 kW 1.4 l/90 kW
Engine code letters: CBZB BCA BUD, CGGA CAXA
Master brake cylin‐
der - ∅ mm 22.2
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand
drive:
7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type
denomination) FS-III FS-III FS-III FS-III
Front brake caliper,
piston - ∅ mm 54.0 54.0 54.0 54.0
Front brake disc – ∅ mm 280.0 280.0 280.0 280.0
Brake disc, thickness mm 22.0 22.0 22.0 22.0
Brake disc, minimum
thickness mm 19.0 19.0 19.0 19.0
Pad thickness with‐
out supporting plate mm 14.0 14.0 14.0 14.0
Minimum pad thick‐
ness without sup‐
porting plate
mm 2.0 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type
denomination) CI 38 CI 38 CII 41 CI 38 CII 411) Bosch
BIRIII2)
Rear brake caliper,
piston - ∅ mm 38.0 38.0 41.0 38.0 41.0 38.0
Rear brake disc – ∅ mm 253.0 255.0 260.0 255.03) / 253.04) 260.03) /
256.04)
272.0
Brake disc, thickness mm 10.0 10.0 12.0 10.0 12.0 10.0
Brake disc, minimum
thickness mm 8.0 8.0 10.0 8.0 10.0 8.0
Pad thickness with‐
out supporting plate mm 11.0 11.0 11.0 11.0 11.0 11.0
Minimum pad thick‐
ness without sup‐
porting plate
mm 2.0 2.0 2.0 2.0 2.0 2.0
1) valid for vehicles up to CW 44/2009
2) valid for vehicles as of CW 45/2009
3) valid for vehicles up to 03.2009
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Brakes 1

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4) valid for vehicles as of 04.2009
Engine 1.6 l/75 kW 1.6 ltr./85
kW FSI 1,8 ltr./112 kW TFSI
Engine code letters: BGU, BSE, BSF, CCSA, CHGA,
CMXA BLF CDAB
Master brake cylinder -
∅mm 22.2
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type de‐
nomination) FS-III FS-III FN3
Front brake caliper,
piston - ∅ mm 54.0 54.0 54.0
Front brake disc – ∅ mm 280.0 280.0 288.0
Brake disc, thickness mm 22.0 22.0 25.0
Brake disc, minimum
thickness mm 19.0 19.0 22.0
Pad thickness without
supporting plate mm 14.0 14.0 14.0
Minimum pad thick‐
ness without support‐
ing plate
mm 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type de‐
nomination) CI 38 CII 411) Bosch
BIRIII2) CII 41 CII 411) Bosch BIRIII2)
Rear brake caliper, pis‐
ton - ∅ mm 38.0 41.0 38.0 41.0 41.0 38.0
Rear brake disc – ∅ mm 255.03) /
253.04) 260.03) / 256.04)
272.0 260.0 260.03) /
256.04)
272.0
Brake disc, thickness mm 10.0 12.0 10.0 12.0 12.0 10.0
Brake disc, minimum
thickness mm 8.0 10.0 8.0 10.0 10.0 8.0
Pad thickness without
supporting plate mm 11.0 11.0 11.0 11.0 11.0 11.0
Minimum pad thick‐
ness without support‐
ing plate
mm 2.0 2.0 2.0 2.0 2.0 2.0
1) valid for vehicles up to CW 44/2009
2) valid for vehicles as of CW 45/2009
3) valid for vehicles up to 03.2009
4) valid for vehicles as of 04.2009
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
2 Rep. gr.00 - Technical data

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Engine 1,8 ltr./118 kW TFSI 2.0 ltr./110
kW FSI 2.0 ltr./110 kW FSI
with four-
wheel drive
2,0 ltr./147 kW
TFSI
Engine code letters: BZB, CDAA BLR, BLY,
BVZ, BVY BLX, BVX BWA, CCZA
Master brake cylinder -
∅mm 22.2 23.8
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type de‐
nomination) FN3 FN3 FN3 FN3
Front brake caliper,
piston - ∅ mm 54.0 54.0 54.0 54.0
Front brake disc – ∅ mm 288.0 288.0 288.0 312.0
Brake disc, thickness mm 25.0 25.0 25.0 25.0
Brake disc, minimum
thickness mm 22.0 22.0 22.0 22.0
Pad thickness without
supporting plate mm 14.0 14.0 14.0 14.0
Minimum pad thick‐
ness without support‐
ing plate
mm 2.0 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type de‐
nomination) CII 411) Bosch
BIRIII2) CII 41 CII 41 CII 411) Bosc
h
BIR‐
III2)
Rear brake caliper, pis‐
ton - ∅ mm 41.0 38.0 41.0 41.0 41.0 38.0
Rear brake disc – ∅ mm 260.03) /
256.04)
272.0 260.0 260.0 286.03) /
282.04)
272.
0
Brake disc, thickness mm 12.0 10.0 12.0 12.0 12.0 10.0
Brake disc, minimum
thickness mm 10.0 8.0 10.0 10.0 10.0 8.0
Pad thickness without
supporting plate mm 11.0 11.0 11.0 11.0 11.0 11.0
Minimum pad thick‐
ness without support‐
ing plate
mm 2.0 2.0 2.0 2.0 2.0 2.0
1) valid for vehicles up to CW 44/2009
2) valid for vehicles as of CW 45/2009
3) valid for vehicles up to 03.2009
4) valid for vehicles as of 04.2009
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Brakes 3

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Engine 1.9 ltr./77 kW
TDI-PD
with four-wheel
drive1)
1.9 ltr./77 kW TDI-
PD
with front-wheel-
drive and automatic
gearbox DSG1)
1.9 ltr./77 kW TDI-PD
with front-wheel-drive
and manual gearbox1)
Engine code letters: BKC, BXE, BLS BKC, BXE BJB, BKC, BXE
Master brake cylinder - ∅ mm 22.2
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand
drive:
7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type denomination) FN3 FN3 FS-III
Front brake caliper, piston - ∅ mm 54.0 54.0 54.0
Front brake disc – ∅ mm 288.0 288.0 280.0
Brake disc, thickness mm 25.0 25.0 22.0
Brake disc, minimum thickness mm 22.0 22.0 19.0
Pad thickness without supporting
plate mm 14.0 14.0 14.0
Minimum pad thickness without sup‐
porting plate mm 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type denomination) CII 41 CII 41 CI 38 CII 41
Rear brake caliper, piston - ∅ mm 41.0 41.0 38.0 41.0
Rear brake disc – ∅ mm 260.0 260.0 255.0 260.0
Brake disc, thickness mm 12.0 12.0 10.0 12.0
Brake disc, minimum thickness mm 10.0 10.0 8.0 10.0
Pad thickness without supporting
plate mm 11.0 11.0 11.0 11.0
Minimum pad thickness without sup‐
porting plate mm 2.0 2.0 2.0 2.0
1) valid up to 04.2006
Engine 1.6 ltr./77 kW TDI CR 1.9 ltr./77 kW TDI-
PD
with four-wheel
drive1)
1.9 ltr./77 kW TDI-PD
with front-wheel-drive
and automatic gear‐
box DSG1)
Engine code letters: CAYC BXE, BLS BXE, BLS
Master brake cylinder - ∅ mm 22.2
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type denomina‐
tion) FS-III FS-III FS-III
Front brake caliper, piston - ∅ mm 54.0 54.0 54.0
Front brake disc – ∅ mm 280.0 280.0 280.0
Brake disc, thickness mm 22.0 22.0 22.0
Brake disc, minimum thickness mm 19.0 19.0 19.0
Pad thickness without support‐
ing plate mm 14.0 14.0 14.0
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
4 Rep. gr.00 - Technical data

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Engine 1.6 ltr./77 kW TDI CR 1.9 ltr./77 kW TDI-
PD
with four-wheel
drive1)
1.9 ltr./77 kW TDI-PD
with front-wheel-drive
and automatic gear‐
box DSG1)
Engine code letters: CAYC BXE, BLS BXE, BLS
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type denomina‐
tion) CII 412) Bosch
BIRIII3) CII 412) Bosch BIRIII3) CI 38
Rear brake caliper, piston - ∅ mm 41.0 38.0 41.0 38.0 38.0
Rear brake disc – ∅ mm 256.0 272.0 260.04) /
256.05)
272.0 255.04) / 253.05)
Brake disc, thickness mm 12.0 10.0 12.0 10.0 10.0
Brake disc, minimum thickness mm 10.0 8.0 10.0 8.0 8.0
Pad thickness without support‐
ing plate mm 11.0 11.0 11.0 11.0 11.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0 2.0 2.0
1) valid as of 05.2006
2) valid for vehicles up to CW 44/2009
3) valid for vehicles as of CW 45/2009
4) valid for vehicles up to 03.2009
5) valid for vehicles as of 04.2009
Engine 1.9 ltr./77 kW TDI-PD
with front-wheel-drive
and manual gearbox1)
2.0 ltr./100 kW TDI-
PD 2.0 ltr./100 kW TDI- PD
with front-wheel-
drive and automatic
gearbox DSG
Engine code letters: BJB, BKC, BXE, BLS AZV AZV
Master brake cylinder - ∅ mm 22.2
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type denomina‐
tion) FS-III FN3 FN3
Front brake caliper, piston - ∅ mm 54.0 54.0 54.0
Front brake disc – ∅ mm 280.0 288.0 288.0
Brake disc, thickness mm 22.0 25.0 25.0
Brake disc, minimum thickness mm 19.0 22.0 22.0
Pad thickness without support‐
ing plate mm 14.0 14.0 14.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type denomina‐
tion) CI 38 CII 412) Bosch
BIRIII3) CII 412) Bosch BIRIII3)
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Brakes 5

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Engine 1.9 ltr./77 kW TDI-PD
with front-wheel-drive
and manual gearbox1)
2.0 ltr./100 kW TDI-
PD 2.0 ltr./100 kW TDI- PD
with front-wheel-
drive and automatic
gearbox DSG
Engine code letters: BJB, BKC, BXE, BLS AZV AZV
Rear brake caliper, piston - ∅ mm 38.0 41.0 38.0 41.0 38.0
Rear brake disc – ∅ mm 255.04) / 253.05) 260.04) /
256.05)
272.0 260.04) /
256.05)
272.0
Brake disc, thickness mm 10.0 12.0 10.0 12.0 10.0
Brake disc, minimum thickness mm 8.0 10.0 8.0 10.0 8.0
Pad thickness without support‐
ing plate mm 11.0 11.0 11.0 11.0 11.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0 2.0 2.0
1) valid as of 05.2006
2) valid for vehicles up to CW 44/2009
3) valid for vehicles as of CW 45/2009
4) valid for vehicles up to 03.2009
5) valid for vehicles as of 04.2009
Engine 2.0 ltr./103 kW TDI-PD
with front-wheel-drive and
automatic gearbox DSG
2.0 ltr./103 kW TDI-PD 2.0 ltr./
125 kW
TDI-PD
Engine code letters: BKD, BMM BKD, BMM BMN
Master brake cylinder - ∅ mm 22.2 23.8
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type denomina‐
tion) FN3 FN3 FN3
Front brake caliper, piston - ∅ mm 54.0 54.0 54.0
Front brake disc – ∅ mm 288.0 288.0 312.0
Brake disc, thickness mm 25.0 25.0 25.0
Brake disc, minimum thickness mm 22.0 22.0 22.0
Pad thickness without support‐
ing plate mm 14.0 14.0 14.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type denomina‐
tion) CII 411) Bosch BIR‐
III2) CII 411) Bosch BIR‐ III2) CII 41
Rear brake caliper, piston - ∅ mm 41.0 38.0 41.0 38.0 41.0
Rear brake disc – ∅ mm 260.03) /
256.04)
272.0 260.03) /
256.04)
272.0 286.0
Brake disc, thickness mm 12.0 10.0 12.0 10.0 12.0
Brake disc, minimum thickness mm 10.0 8.0 10.0 8.0 10.0
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
6 Rep. gr.00 - Technical data

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Engine 2.0 ltr./103 kW TDI-PD
with front-wheel-drive and
automatic gearbox DSG
2.0 ltr./103 kW TDI-PD 2.0 ltr./
125 kW
TDI-PD
Engine code letters: BKD, BMM BKD, BMM BMN
Pad thickness without support‐
ing plate mm 11.0 11.0 11.0 11.0 11.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0 2.0 2.0
1) valid for vehicles up to CW 44/2009
2) valid for vehicles as of CW 45/2009
3) valid for vehicles up to 03.2009
4) valid for vehicles as of 04.2009
Engine 2.0 ltr./125 kW TDI CR 2.0 l/103 kW TDI CR 2.0 l/81 kW TDI CR
Engine code letters: CEGA CFHC, CLCB CLCA
Master brake cylinder - ∅ mm 23.8 22.2 22.2
Brake servo unit - ∅ Inch Left-hand drive: 10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type denomina‐
tion) FN3 FN3 FS-III
Front brake caliper, piston - ∅ mm 54.0 54.0 54.0
Front brake disc – ∅ mm 312.0 288.0 280.0
Brake disc, thickness mm 25.0 25.0 22.0
Brake disc, minimum thickness mm 22.0 22.0 19.0
Pad thickness without support‐
ing plate mm 14.0 14.0 14.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0
♦ Rear disc brake:
Rear brake caliper (type denomina‐
tion) CII 411) Bosch
BIRIII2) Bosch BIRIII CI 38
Rear brake caliper, piston - ∅ mm 41.0 38.0 38.0 38.0
Rear brake disc – ∅ mm 286.03) /
282.04)
272.0 272.0 253.0
Brake disc, thickness mm 12.0 10.0 10.0 10.0
Brake disc, minimum thickness mm 10.0 8.0 8.0 8.0
Pad thickness without support‐
ing plate mm 11.0 11.0 11.0 11.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0 2.0 2.0
1) valid for vehicles up to CW 44/2009
2) valid for vehicles as of CW 45/2009
3) valid for vehicles up to 03.2009
4) valid for vehicles as of 04.2009
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Brakes 7

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Engine 2.0 l/81 kW TDI CR
Engine code letters: CFHF
Master brake cylinder - ∅ mm 22.2
Brake servo unit - ∅ Inch Left-hand
drive:
10
Right-hand drive: 7"/8" - tandem
♦ Front disc brake:
Front brake caliper (type denomina‐
tion) FS-III
Front brake caliper, piston - ∅ mm 54.0
Front brake disc – ∅ mm 280.0
Brake disc, thickness mm 22.0
Brake disc, minimum thickness mm 19.0
Pad thickness without support‐
ing plate mm 14.0
Minimum pad thickness with‐
out supporting plate mm 2.0
♦ Rear disc brake:
Rear brake caliper (type denomina‐
tion) CI 381) Bosch
BIRIII2)
Rear brake caliper, piston - ∅ mm 38.0 38.0
Rear brake disc – ∅ mm 253.0 272.0
Brake disc, thickness mm 10.0 10.0
Brake disc, minimum thickness mm 8.0 8.0
Pad thickness without support‐
ing plate mm 11.0 11.0
Minimum pad thickness with‐
out supporting plate mm 2.0 2.0
1) valid for vehicles with front-wheel drive
2) valid for vehicles with four-wheel drive
1.2 Brake fluid
Classification N 052 766.Z0 according to the USA standard FMVSS 571.116 DOT4 and VW standard
501 14
Change ⇒ Maintenance ; Booklet Octavia II
1.3 Brake inspection
General information:
♦ The test stand is used as drive.
♦ During the testing, the idling speed must be set on vehicles
with manual gearbox and the driving position »N« must be
engaged on vehicles with automatic gearbox.
♦ When conducting the test, observe the specifications provided
by the manufacturer of the test rig.
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
8 Rep. gr.00 - Technical data

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Note
The brake regulation systems do not function when ignition is off.
Test - vehicles with front-wheel-drive
The brake test must be performed on a single-axle roller dyna‐
mometer.
The test speed must not exceed 6 km/h.
The test stands approved by Škoda comply with these conditions.
Test - vehicles with four-wheel drive with four-wheel clutch.
The brake inspection must be performed on a contra-rotative sin‐
gle axle roller type test stand for vehicles with four-wheel drive.
Contra-rotative means: The test stand rollers of the single axle
roller type test stand rotate forwards on the one side and back‐
wards on the other side.
Thus, a transfer of the braking forces in the drive train is preven‐
ted.
The wheel which rotates forwards is measured each time during
the test, this requires the need of two braking tests per axle.
The test speed must not exceed 6 km/h.
The test stands approved by Škoda comply with these conditions.
If a test stand is not available for vehicles with four-wheel drive,
the brake inspection can also be performed on a standard single
axle roller type test stand as follows:
– Drive the vehicle forwards onto the rollers.
– Switch off engine and wait 2 seconds.
– Perform brake inspection at the front.
– Start engine and wait approx. 5 seconds until adequate vac‐
uum has built up.
– Drive the vehicle forwards until the rear wheels are standing
on the rollers.
– Switch off engine and wait 2 seconds.
– Perform brake inspection at the rear.
– Start engine and wait approx. 5 seconds until adequate vac‐
uum has built up.
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Brakes 9

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with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
45 – Anti-lock brake system
1 Antilock braking system (ABS)
General instructions for ABS ⇒ page 10
Distinguishing features of the ABS systems ⇒ page 13
Safety precautions, basic information on fault finding and on re‐
pairing ⇒ page 14
Required technical information ⇒ page 14
1.1 General instructions for ABS
The ABS brake system is split diagonally. The brake servo as‐
sistance is provided pneumatically by the vacuum brake servo
unit.
Vehicles fitted with ABS do not have a mechanical brake pressure
regulator. Specifically matched software in the ABS control unit -
J104- regulates the brake pressure distribution on the rear axle.
Note
♦ If the ABS hydraulic unit - N55- is damaged, the ABS control
unit - J104- must be fully replaced with the ABS hydraulic unit
- N55- .
♦ The ABS control unit - J104- can be separated from the ABS
hydraulic unit - N55- ⇒ page 42 , if required ⇒ page 61 .
♦ The hydraulic pump and the ABS hydraulic unit - N55- must
not be separated from each other.
♦ Faults in the ABS do not influence the brake system and servo
assistance. The conventional braking system remains fully
functional even without ABS. There will be a change in braking
behaviour. After the ABS warning lamp comes on, the rear
wheels may lock prematurely during braking.
Arrangement of the ABS, left-hand drive vehicle
1 - ABS hydraulic unit - N55- with ABS control unit - J104-
2 - Brake servo
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
10 Rep. gr.45 - Anti-lock brake system

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
Arrangement of the ABS in right-hand drive vehicles
1 - Brake servo
2 - ABS hydraulic unit - N55- with ABS control unit - J104-
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Antilock braking system (ABS) 11

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
The ABS control unit - J104- -1- and the ABS hydraulic unit - N55-
-2- form a single unit. They can only be separated after the
complete unit is removed. The ABS control unit - J104- can be
separated from the ABS hydraulic unit - N55- ⇒ page 42 , if
required ⇒ page 61 . The hydraulic pump -3- must not be sep‐
arated from the ABS hydraulic unit - N55- -2-.
New control units supplied by the spare parts area are not coded.
They must be coded after installation ⇒ Vehicle diagnostic tester.
♦ Before starting work on anti-lock brake systems, query the
event memory to check for complaints and conduct guided
fault finding ⇒ Vehicle diagnostic tester.
♦ Do not separate plug connections unless the ignition is switch‐
ed off.
♦ Before commencing work on the ABS systems, switch off the
ignition and disconnect the earth strap at the battery ⇒ Elec‐
trical System; Rep. gr. 27 .
♦ If the battery earth strap is disconnected and connected, carry
out additional operations ⇒ Electrical System; Rep. gr. 27 .
♦ Welding work using electric welding equipment may affect the
ABS system.
♦ Do the following before commencing welding work using elec‐
trical welding tool:
– Disconnect the earth strap from the negative terminal of the
battery and cover the negative terminal.
– Connect the earth connection of the electric welding tool di‐
rectly to the part to be welded. There must not be any electri‐
cally insulated parts between the earth connection and the
welding point.
– Electronic control units and electrical wiring must not touch the
earth connection or the welding electrode.
♦ During painting operations, the ABS control unit - J104- may
be exposed to a maximum temperature of 95 °C for only a
short period, and to a maximum of 85 °C for longer periods
(approx. 2 hours).
♦ Do not drive the vehicle if the connector is unplugged from the
ABS control unit - J104- .
♦ Absolute cleanliness is required when working on the anti-lock
brake system. It is not permitted to use any products which
contain mineral oil, such as oils, greases etc.
♦ Thoroughly clean connection points and the surrounding area
before disconnecting, but do not use any aggressive cleaning
agents, such as brake cleaner, petroleum, thinner or similar.
♦ Place removed parts on a clean surface and cover.
♦ Carefully cover or close opened components if the repair is not
completed immediately (use plugs from the repair kit - 1H0 698
311 A- ).
♦ Only use lint-free cloths.
♦ Do not remove spare parts from their wrappings until immedi‐
ately before installation.
♦ Use only genuine wrapped parts.
♦ When the system is open, do not work with compressed air
and do not move the vehicle.
♦ The valve coils in the ABS control unit - J104- must not be
calibrated.
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
12 Rep. gr.45 - Anti-lock brake system

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted
unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
♦ The valve coils in the ABS control unit - J104- cannot be re‐
placed.
♦ The pressure sensor must not be modified or damaged.
♦ The pressure sensor cannot be replaced.
♦ The sensor housing must not be subjected to mechanical load.
♦ No measurements must be carried out at the contact points of
the ABS control unit - J104- .
♦ No measurements must be carried out at the contact points of
the ABS hydraulic unit - N55- .
♦ The valve domes of the ABS hydraulic unit - N55- must not be
damaged or bent.
♦ The contacts on the ABS control unit - J104- and the ABS hy‐
draulic unit - N55- cannot be replaced.
♦ Do not use contact spray.
♦ No contamination or foreign object may located between ABS
control unit - J104- and ABS hydraulic unit - N55- .
♦ Ensure that no brake fluid enters connectors.
♦ Observe the relevant instructions when handling brake fluid.
♦ After completing work which involved opening the brake sys‐
tem, bleed the brake system with the brake filling and bleeding
device , e. g. -VAS 5234- , ⇒ page 168 .
♦ During the subsequent road test, ensure that at least one con‐
trolled brake application is performed (pulsing must be felt on
the brake pedal).
1.2 Distinguishing features of the ABS sys‐
tems
♦ ABS - wheel control system when braking. It prevents the
wheels from locking when braking.
♦ ESP (ESC) - electronic stability program. It prevents the vehi‐
cle from skidding by means of a targeted intervention in the
braking and steering process.
♦ EDL - electronic differential lock. It enables the driving off on
a road with different friction coefficients under the right and left
drive wheel by braking of the wheel which is slipping.
♦ TCS - traction control system. It prevents the driving wheels
from slipping when accelerating by throttling the engine power
output.
♦ MBA - mechanical brake assistance.
♦ HBA - hydraulic brake assistance.
♦ EDC - Engine Drag Torque Control. It prevents the driving
wheels from locking, if suddenly the accelerator pedal is re‐
leased or when braking with a gear engaged.
♦ EBD - electronic brake pressure distribution.
♦ DSR - automatic steering recommendation. Recommends to
the driver a change in the steering position, which under cer‐
tain conditions can increase the efficiency of the ESP (ESC).
♦ HHC - Hill Hold Control. Makes it easy to set off on hills without
the vehicle rolling back and also without operating the parking
brake.
♦ RKA (TPM) - Tyre inspection display
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
1. Antilock braking system (ABS) 13

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unless authorised by ŠKODA AUTO A. S. ŠKODA AUTO A. S. does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by ŠKODA AUTO A. S.�
♦ XDS - Extension of the electronic differential lock. It reacts
when the front inside wheel lifts during fast cornering. XDS
intervenes by using braking pressure on the inside wheel, in
order to prevent spinning. In doing so, the traction improves
and the track stability of the vehicle increases.
1.3 Safety precautions, basic information on
fault finding and on repairing
♦ ABS is a vehicle security system, in-depth knowledge of the
system is required for working on such systems. Testing and
replacement or repairs should be carried out by personnel
specially trained for ABS.
♦ Faults are indicated by the ABS warning light , the red brake
system warning light and the warning light for ESP (ESC) .
Certain faults are not detected until after a minimum speed of
20 km/h has been exceeded (conduct a road test).
♦ If the ABS warning light and the brake system warning light do
not light up and if in spite of this the brake system is not fully
operational, look for the fault in the conventional brake system
⇒ page 94 and ⇒ page 153 .
1.4 Required technical information
♦ ⇒ Current flow diagrams, Electrical fault finding and Fitting lo‐
cations
♦ Construction and function of brake systems ⇒ Self-study pro‐
gramme No. 28 ; ESP (ESC) and ⇒ Self-study programme
No. 59 ; DSR and HHC
♦ Technical Service Handbook
♦ Owner's Manual Vehicle diagnosis, measurement and infor‐
mation system - VAS-
Octavia II 2004 ➤ , Octavia II 2010 ➤
Brake systems - Edition 11.2017
14 Rep. gr.45 - Anti-lock brake system