Audi TT 69 User Manual
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Service
Workshop Manual
Audi TT 2007 ➤
Electrical system
Edition 11.2010
Service Department. Technical Information
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Service
List of Workshop Manual Repair GroupsList of Workshop Manual
Repair GroupsList of Workshop Manual Repair Groups
Re pa ir G ro up
27 - Starter, current supply, CCS
90 - Gauges, instruments
92 - Windscreen wash/wipe system
94 - Lights, bulbs, switches - exterior
96 - Lights, bulbs, switches - interior
97 - Wiring
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.
All rights reserved.
No reproduction without prior agreement from publisher.
Copyright © 2010 Audi AG, Ingolstadt A005TT01320
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Contents
27 - Starter, current supply, CCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Battery - general notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Maintenance-free batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3 Exploded view of battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.4 Disconnecting and connecting battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.5 Removing and installing earth cable with battery monitor control unit J367 . . . . . . . . . . . . 5
2.6 Removing and installing battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.7 Checking battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.8 Charging battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.9 Preparations before charging battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.10 Preparations for back-up power supply of battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.11 Removing and installing battery isolation igniter N253 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Removing and installing alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Exploded view of alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Audi TT and TTS with 2.0 ltr. TFSI engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Audi TT RS with 2.5 ltr. TFSI engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Audi TT with 3.2 ltr. MPI engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5 Audi TT with 2.0 ltr. TDI engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Checking and servicing alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1 Checking alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2 Servicing alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Removing and installing starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.1 Exploded view of starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2 Audi TT with 2.0 ltr. TFSI engine and manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.3 Audi TT with 2.0 ltr. TFSI engine and direct shift gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.4 Audi TTS with 2.0 ltr. TFSI engine and direct shift gearbox . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5 Audi TT RS with 2.5 ltr. TFSI engine and manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . 28
5.6 Audi TT with 3.2 ltr. MPI engine and manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.7 Audi TT with 3.2 ltr. MPI engine and direct shift gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.8 Audi TT with 2.0 ltr. TDI engine and manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.9 Exploded view of starter - Audi TT RS with dual clutch gearbox . . . . . . . . . . . . . . . . . . . . 34
5.10 Audi TT RS with 2.5 ltr. TFSI engine and dual clutch gearbox . . . . . . . . . . . . . . . . . . . . . . 35
6 Cruise control system (CCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
90 - Gauges, instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2 Instrument cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.1 Exploded view of instrument cluster and radio-controlled clock receiver . . . . . . . . . . . . . . 38
2.2 Removing and installing instrument cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2.3 Pin assignment at multi-pin connectors on instrument cluster . . . . . . . . . . . . . . . . . . . . . . 40
2.4 Pin assignment at fuel gauge sender G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.5 Pin assignment at fuel gauge sender 2 G169 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.6 Pin assignment at coolant temperature senders - 2.0 ltr. TFSI engine . . . . . . . . . . . . . . . . 43
2.7 Pin assignment at coolant temperature sender - 2.5 ltr. TFSI engine . . . . . . . . . . . . . . . . 44
2.8 Pin assignment at coolant temperature senders - 3.2 ltr. MPI engine . . . . . . . . . . . . . . . . 45
2.9 Pin assignment at coolant temperature senders - 2.0 ltr. TDI engine . . . . . . . . . . . . . . . . 46
2.10 Removing and installing ambient temperature sensor G17 . . . . . . . . . . . . . . . . . . . . . . . . 47
2.11 Removing and installing ambient temperature sensor G17 - Audi TT RS . . . . . . . . . . . . . . 47
2.12 Removing and installing radio-controlled clock receiver J489 . . . . . . . . . . . . . . . . . . . . . . 48
3 Cigarette lighter, 12 V electric socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Contents i
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
3.1 Exploded view of cigarette lighter, 12 V electric socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.2 Removing and installing cigarette lighter U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4 Horns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.1 Exploded view of horns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.2 Removing and installing horns H2 / H7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5 Data bus diagnostic interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.1 Data bus diagnostic interface J533 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.2 Removing and installing data bus diagnostic interface J533 . . . . . . . . . . . . . . . . . . . . . . . . 54
5.3 Connector at data bus diagnostic interface J533 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
92 - Windscreen wash/wipe system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
2 Windscreen wiper system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2.1 Exploded view of windscreen wiper system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2.2 Moving windscreen wipers to service position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
2.3 Renewing wiper blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
2.4 Removing and installing wiper arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
2.5 Adjusting wiper arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
2.6 Removing and installing wiper motor with wiper motor control unit J400 . . . . . . . . . . . . . . 62
2.7 Renewing wiper motor with wiper motor control unit J400 . . . . . . . . . . . . . . . . . . . . . . . . 63
3 Windscreen washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.1 Overview of washer fluid reservoir and washer fluid hoses . . . . . . . . . . . . . . . . . . . . . . . . 64
3.2 Removing and installing washer fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.3 Removing and installing washer jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
3.4 Adjusting washer jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4 Headlight washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.1 Exploded view of headlight washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.2 Removing and installing headlight washer jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.3 Adjusting washer jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.4 Removing and installing washer fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
5 Washer fluid hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
94 - Lights, bulbs, switches - exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
2 Halogen headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
2.1 Exploded view of halogen headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
2.2 Removing and installing headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
2.3 Renewing headlight dipped beam bulb M29 / M31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
2.4 Renewing headlight main beam bulb M30 / M32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
2.5 Renewing side light bulb M1 / M3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
2.6 Renewing front turn signal bulb M5 / M7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
2.7 Removing and installing headlight range control motor V48 / V49 . . . . . . . . . . . . . . . . . . 79
2.8 Installing repair kit for headlight housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
2.9 Converting headlights for driving on the left or right side of the road . . . . . . . . . . . . . . . . . . 81
3 Bi-xenon gas discharge headlights with cornering light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
3.1 Safety precautions when handling gas discharge bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . 82
3.2 Exploded view of bi-xenon gas discharge headlight with cornering light . . . . . . . . . . . . . . 82
3.3 Removing and installing headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
3.4 Renewing gas discharge bulb L13 / L14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
3.5 Renewing daytime running light bulb L174 / L175 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3.6 Renewing side light bulb M1 / M3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3.7 Removing and installing left/right headlight screen adjustment solenoid N395 / N396 . . . . 88
3.8 Removing and installing left/right swivel module position sensor G474 / G475 . . . . . . . . 88
3.9 Renewing front turn signal bulb M5 / M7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
ii Contents
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
3.10 Removing and installing left/right gas discharge bulb control unit J343 / J344 . . . . . . . . . . 88
3.11 Removing and installing dynamic cornering light control motor V318 / V319 . . . . . . . . . . 89
3.12 Removing and installing headlight range control motor V48 / V49 . . . . . . . . . . . . . . . . . . 89
3.13 Installing repair kit for headlight housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
3.14 Converting headlights for driving on the left or right side of the road . . . . . . . . . . . . . . . . . . 90
4 Bi-xenon gas discharge headlights with cornering light, LED daytime running light . . . . . . 92
4.1 Safety precautions when handling gas discharge bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . 92
4.2 Exploded view of bi-xenon gas discharge headlight with cornering light, LED daytime running
light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
4.3 Removing and installing headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
4.4 Renewing gas discharge bulb L13 / L14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
4.5 Renewing LED module for daytime running light and side light L176 / L177 , M1 / M3 . . 96
4.6 Removing and installing left/right headlight screen adjustment solenoid N395 / N396 . . . . 96
4.7 Removing and installing left/right swivel module position sensor G474 / G475 . . . . . . . . 96
4.8 Renewing front turn signal bulb M5 / M7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
4.9 Removing and installing left/right gas discharge bulb control unit J343 / J344 . . . . . . . . . . 97
4.10 Removing and installing dynamic cornering light control motor V318 / V319 . . . . . . . . . . 98
4.11 Removing and installing headlight range control motor V48 / V49 . . . . . . . . . . . . . . . . . . 98
4.12 Installing repair kit for headlight housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
4.13 Converting headlights for driving on the left or right side of the road . . . . . . . . . . . . . . . . . . 99
5 Automatic headlight range control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
5.1 Overview of automatic headlight range control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
5.2 Removing and installing control unit for headlight range control J431 . . . . . . . . . . . . . . . . 101
6 Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6.1 Exploded view of fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6.2 Removing and installing fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6.3 Renewing fog light bulb L22 / L23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
7 Checking and adjusting headlight settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
7.1 Adjusting headlights - rest-of-the-world vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
7.2 Adjusting headlights - USA vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
7.3 Adjusting fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
7.4 Adjusting additional headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
8 Turn signal repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
8.1 Exploded view of exterior mirror turn signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
8.2 Removing and installing exterior mirror turn signal bulb L131 / L132 . . . . . . . . . . . . . . . . 113
9 Tail light cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
9.1 Exploded view of tail light cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
9.2 Removing and installing tail light cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
9.3 Removing and installing bulb carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
10 Exterior lights (rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
10.1 Exploded view of rear fog light, high-level brake light and number plate light . . . . . . . . . . 117
10.2 Removing and installing rear fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
10.3 Removing and installing bulb carrier for rear fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
10.4 Removing and installing high-level brake light bulb M25 . . . . . . . . . . . . . . . . . . . . . . . . . . 118
10.5 Removing and installing number plate light X4 / X5 - vehicles up to 11.2006 . . . . . . . . . . 119
10.6 Removing and installing number plate light X4 / X5 - vehicles from 11.2006 onwards . . . . 119
11 Steering column switch module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
11.1 Exploded view of steering column switch module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
11.2 Removing and installing steering column electronics control unit J527 . . . . . . . . . . . . . . 121
11.3 Pin assignment on steering column electronics control unit J527 . . . . . . . . . . . . . . . . . . . . 122
11.4 Removing and installing return ring with slip ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
11.5 Removing and installing steering angle sender G85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
11.6 Removing and installing turn signal switch E2 and cruise control system switch E45 . . . . 126
11.7 Removing and installing intermittent wiper switch E22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Contents iii
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
12 Lock cylinder and ignition/starter switch with steering lock . . . . . . . . . . . . . . . . . . . . . . . . 128
12.1 Exploded view of lock cylinder, ignition/starter switch and steering lock . . . . . . . . . . . . . . 128
12.2 Removing and installing lock cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
12.3 Removing and installing ignition key withdrawal lock solenoid N376 . . . . . . . . . . . . . . . . 130
12.4 Removing and installing ignition/starter switch D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
12.5 Pin assignment on ignition/starter switch D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
12.6 Removing and installing steering lock housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
12.7 Removing and installing adapter wiring harness for steering lock housing . . . . . . . . . . . . 133
13 Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
13.1 Overview of parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
13.2 Removing and installing parking aid control unit J446 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
13.3 Removing and installing rear parking aid warning buzzer H15 (Coupé) . . . . . . . . . . . . . . 135
13.4 Removing and installing rear parking aid warning buzzer H15 (Roadster) . . . . . . . . . . . . 135
13.5 Removing and installing rear parking aid senders G203 / G204 / G205 / G206 . . . . . . . . 136
96 - Lights, bulbs, switches - interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
2 Lights and switches in dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
2.1 Overview of lights and switches in dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
2.2 Removing and installing central locking deadlock function warning lamp -SAFE- K133 . . 139
2.3 Removing and installing light switch E1 with E20 , E102 , E579 . . . . . . . . . . . . . . . . . . . . 139
2.4 Removing and installing switch and instrument illumination regulator E20 , headlight range
control regulator E102 , daytime running lights switch E579 . . . . . . . . . . . . . . . . . . . . . . . . 140
2.5 Removing and installing heated driver seat regulator E94 /heated front passenger seat
regulator E95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
2.6 Removing and installing warning lamp for airbag deactivated on front passenger side K145
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
2.7 Removing and installing glove compartment light W6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
2.8 Removing and installing glove compartment light switch E26 . . . . . . . . . . . . . . . . . . . . . . 141
2.9 Removing and installing footwell illumination bulb (front) L151 / L152 . . . . . . . . . . . . . . . . 142
3 Lights and switches in front doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
3.1 Overview of lights and switches in front doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
3.2 Removing and installing mirror adjustment switch E43 or adjustment switch for mirror with
fold-in feature E168 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
3.3 Removing and installing window regulator switches E512 / E107 . . . . . . . . . . . . . . . . . . 145
3.4 Removing and installing door contact switch F2 / F3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
3.5 Removing and installing interior locking button for central locking system E308 / E309 . . 145
3.6 Removing and installing door interior handle illumination bulb L146 / L147 . . . . . . . . . . . . 146
3.7 Removing and installing rear lid remote release button E233 / fuel tank flap release button
E319 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
3.8 Removing and installing front entry light W31 / W32 and door warning lamp W30 / W36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
4 Lights and switches in centre console, luggage compartment . . . . . . . . . . . . . . . . . . . . . . 148
4.1 Overview of selector lever position display, operating unit in centre console, convertible roof
actuation, rear lid lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
4.2 Removing and installing operating unit in front of centre console E461 with E127 , E226 ,
E229 , E256 , E387 and E541 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
4.3 Removing and installing selector lever position display Y26 with selector lever display
illumination bulb L101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
4.4 Removing and installing convertible roof actuation button E137 . . . . . . . . . . . . . . . . . . . . 151
4.5 Removing and installing cabrio windbreak switch E278 . . . . . . . . . . . . . . . . . . . . . . . . . . 152
4.6 Removing and installing right luggage compartment light W35 . . . . . . . . . . . . . . . . . . . . 153
4.7 Removing and installing rear lid contact switch for anti-theft alarm F123 . . . . . . . . . . . . . . 153
5 Lights and switches in roof trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
5.1 Overview of lights and switches in roof trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
5.2 Removing and installing vanity mirror light bulb L31 - Coupé . . . . . . . . . . . . . . . . . . . . . . 155
5.3 Removing and installing contact switch for vanity mirror F147 / F148 . . . . . . . . . . . . . . . . 155
iv Contents
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
5.4 Removing and installing interior light/reading light (front) . . . . . . . . . . . . . . . . . . . . . . . . . . 155
5.5 Renewing interior light/reading light bulbs (front) W1 / W13 / W19 . . . . . . . . . . . . . . . . . . 156
5.6 Renewing LED for interior light/reading light (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
5.7 Removing and installing garage door operation control unit J530 . . . . . . . . . . . . . . . . . . 157
5.8 Removing and installing garage door operating unit E284 . . . . . . . . . . . . . . . . . . . . . . . . 157
6 Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
7 Ultrasonic interior monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
7.1 Overview of ultrasonic interior monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
7.2 Removing and installing interior monitoring switch E183 / alarm system off switch E217
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
7.3 Removing and installing anti-theft alarm sensor G578 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
7.4 Removing and installing convenience system central control unit J393 . . . . . . . . . . . . . . 162
7.5 Removing and installing alarm horn H12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
97 - Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
2 Relay carriers, fuse carriers (engine compartment) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
2.1 Component protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
2.2 Overview of engine compartment electronics box, main fuse box and door separating
connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
2.3 Removing and installing engine compartment electronics box . . . . . . . . . . . . . . . . . . . . . . 167
2.4 Removing and installing suppression filter C24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
2.5 Removing and installing relay and fuse carrier in engine compartment electronics box . . 169
2.6 Removing and installing fuse holders in engine compartment electronics box . . . . . . . . . . 170
2.7 Unplugging door separating connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
2.8 Removing and installing main fuse box in luggage compartment (rear right) at battery . . 171
3 Relay carriers, fuse carriers (vehicle interior, luggage compartment) . . . . . . . . . . . . . . . . 173
3.1 Overview of relay carriers and fuse carriers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
3.2 Removing and installing fuse holder in dash panel (left-side) . . . . . . . . . . . . . . . . . . . . . . 174
3.3 Removing and installing onboard supply control unit J519 - vehicles up to 05.2008 . . . . . . 174
3.4 Removing and installing onboard supply control unit J519 - vehicles from 06.2008
onwards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
3.5 Removing and installing 5-position relay carrier - vehicles from 06.2008 onwards . . . . . . 176
3.6 Removing and installing relay carrier underneath dash panel (left-side) . . . . . . . . . . . . . . 177
3.7 Removing and installing luggage compartment fuse holder (right-side) . . . . . . . . . . . . . . 177
4 Repairing wiring harnesses and electrical connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
5 Repairing connector housings and electrical connectors . . . . . . . . . . . . . . . . . . . . . . . . . . 180
6 Releasing and dismantling connector housings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
7 Cleaning contact surfaces with contact surface cleaning set VAS 6410 . . . . . . . . . . . . . . 182
8 Repairing aerial wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
9 Fibre optic cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
10 Vehicle diagnostic, testing and information systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Contents v
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
vi Contents
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
27 – Starter, current supply, CCS
1 Contact corrosion
Contact corrosion can occur if unsuitable fasteners (bolts, nuts,
washers, etc.) are used.
For this reason, only fasteners with a special surface coating are
fitted.
Furthermore, rubber components or plastic components and ad‐
hesives are made of non-conductive material.
Always fit new components if you are not sure that the old com‐
ponents are suitable ⇒ Electronic parts catalogue .
Note:
♦ We recommend the use of genuine replacement parts only;
they have been tested and are compatible with aluminium.
♦ We recommend using Audi Genuine Accessories.
♦ Damage resulting from contact corrosion is not covered by
warranty.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
1. Contact corrosion 1
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
2 Battery
Observe notes on contact corrosion ⇒ page 1 .
2.1 Battery - general notes
The following descriptions are given in ⇒ Electrical system; Gen‐
eral information; Rep. gr. 27 :
♦ Safety measures and procedures to be followed
♦ Warnings and safety procedures when handling lead-acid bat‐
teries
2.2 Maintenance-free batteries
The following descriptions are given in ⇒ Electrical system; Gen‐
eral information; Rep. gr. 27 :
♦ Battery with „magic eye“
♦ Checking battery with „magic eye“
♦ Valve-regulated lead acid (VRLA) or absorbent glass mat
(AGM) battery without „magic eye“
♦ Checking valve-regulated lead acid or AGM battery
♦ Central gas venting system
♦ Battery terminal screw connection
♦ Visual inspection of battery
♦ Checking colour indicator (electrolyte level in battery) - batter‐
ies with „magic eye“
♦ Checking electrolyte level in battery
2 Rep. gr.27 - Starter, current supply, CCS
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2.3 Exploded view of battery
1 - Nut
❑ 20 Nm
2 - Bolt
3 - Nut
❑ 6 Nm
4 - Main fuse box
❑ In luggage compart‐
ment (rear right) at bat‐
tery
❑ Disconnecting and con‐
necting ⇒ page 4
5 - Positive cable
❑ To engine
6 - Nut
❑ 15 Nm
7 - Nut
❑ 5.5 Nm
8 - Jump start socket -U6-
❑ Remote positive termi‐
nal of battery
9 - Nut
❑ 5.5 Nm
10 - Jump start socket (earth
stud)
❑ Remote negative termi‐
nal of battery
❑ 9 Nm
11 - Nut
❑ Tightening torque
⇒ Current flow diagrams, Electrical fault finding and Fitting locations
12 - Retainer
❑ For securing battery
13 - Nut
❑ 20 Nm
14 - Cover for negative terminal
15 - Electrical wiring
❑ For battery monitor control unit -J367❑ Observe correct sequence when connecting earth cable ⇒ page 5
Audi TT 2007 ➤
Electrical system - Edition 11.2010
16 - Earth cable with battery monitor control unit -J367-
❑ Different versions ⇒ Electronic parts catalogue
❑ Disconnecting and connecting ⇒ page 4
❑ Removing and installing ⇒ page 5
17 - Bolt
18 - Nut
❑ 6 Nm
2. Battery 3
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
19 - Hose for central gas venting system
20 - Grommet
❑ For hose for central gas venting system
21 - Battery
❑ In luggage compartment (rear right)
❑ Removing and installing ⇒ page 6
22 - Retainer plate
❑ Different versions ⇒ Electronic parts catalogue
2.4 Disconnecting and connecting battery
Disconnecting
– Switch off ignition and take out ignition key.
– Remove floor covering from luggage compartment.
– If fitted, remove nut -5- and disengage retainer -2- on opposite
side.
– Release retaining clips -arrows- and remove cover -1- for neg‐
ative battery terminal.
Note
If cover for negative battery terminal is located underneath rear
cross panel trim, the rear cross panel trim must be removed ⇒
Rep. gr. 70 .
– Loosen nut -4- a few turns and disconnect battery clamp -3-
of earth cable from battery terminal.
4 Rep. gr.27 - Starter, current supply, CCS
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Connecting
• Tightening torque ⇒ page 3
– On vehicles with battery monitor control unit -J367- , unplug
electrical connector -2- at battery monitor control unit -J367-
-item 3-.
– When connecting battery, attach battery clamp of earth cable
to negative battery terminal „–“ by hand and tighten nut.
– Reconnect connector at battery monitor control unit -J367- .
The following measures are required after re-connecting the bat‐
tery:
♦ Activate automatic open/close function of electric window reg‐
ulators - see ⇒ Owner's Manual .
♦ Synchronise spare key and additional key to ensure correct
remote control operation. To do so, insert key in ignition lock,
switch on the ignition and then off again, then remove the key.
♦ Interrogate event memories of all control units and erase „Low
voltage“ entry ⇒ Vehicle diagnostic, testing and information
system VAS 5051.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Note
After reconnecting the voltage supply, it is possible that the ESP
warning lamp will not go out until the vehicle has been driven
several metres.
2.5 Removing and installing earth cable with battery monitor control unit -J367-
Removing
– Disconnect battery ⇒ page 4 .
– Remove foam insert (right-side) for vehicle tool kit.
– If fitted, remove spare wheel well lining ⇒ Rep. gr. 70 .
– Unplug electrical connector -4-.
– If fitted, cut through cable tie -2-.
– Remove nut -1- and detach earth cable -3- with battery monitor
control unit -J367- -item 5-.
Installing
• Tightening torques ⇒ page 3
Installation is carried out in the reverse order; note the following:
– Install foam insert (right-side) for vehicle tool kit.
– Connect battery ⇒ page 5 .
2. Battery 5
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Audi TT 2007 ➤
Electrical system - Edition 11.2010
2.6 Removing and installing battery
Removing
– Switch off ignition and take out ignition key.
– Remove floor covering from luggage compartment.
– Remove foam insert (right-side) for vehicle tool kit.
– If fitted, remove nut -5- and disengage retainer -2- on opposite
side.
– Release retaining clips -arrows- and remove cover -1- for neg‐
ative battery terminal.
Note
If cover for negative battery terminal is located underneath rear
cross panel trim, the rear cross panel trim must be removed ⇒
Rep. gr. 70 .
– Connect battery charger to provide back-up power supply
⇒ page 10 .
– Loosen nut -4- a few turns and disconnect battery clamp -3-
of earth cable from battery terminal.
6 Rep. gr.27 - Starter, current supply, CCS
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Loosen nut -4- several turns and disconnect battery clamp
-5- of positive cable together with main fuse box from positive
battery terminal.
– Unscrew nut -2- on battery retainer plate -1-.
– Pull battery -3- slightly out of battery retainer.
– Pull off hose -6- for central gas venting system.
– Lift battery out of luggage compartment (right-side).
WARNING
Observe environmental requirements.
♦ When disposing of used batteries, always observe the re‐
quired disposal procedures for batteries and sulphuric
acid ⇒ Electrical system; General information; Rep. gr.
27 .
Installing
• Tightening torques ⇒ page 3
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Note
♦
Only install maintenance-free batteries with the specifications
„TL82506“ (from December 1997 onwards) and
„VW75073“ (from August 2001 onwards).
♦
If a leakproof, deep-cycle VRLA or AGM battery was fitted as
original equipment, this type of battery must also be installed
as a replacement.
♦
Batteries from the Audi parts range feature a base strip adapt‐
er for matching to different retainer flanges. The battery oper‐
ating instructions give details of when and how to use the base
strip adapter.
– Insert battery in battery retainer; the battery base strip must
engage in the retainer flanges of the battery retainer
-arrows-.
• It should no longer be possible to move the battery.
2. Battery 7
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Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Connect hose -6- for central gas venting system. Observe
notes in ⇒ Electrical system; General information; Rep. gr.
27 .
– Place battery retainer plate -1- in position.
• Lug on battery retainer plate must engage in recess on battery
base strip.
– Tighten nut -2- for battery retainer plate.
Connect up battery -3- in the following sequence with ignition and
electrical equipment switched off:
– First connect battery clamp -5- of positive cable by hand to
positive battery terminal „+“ and tighten nut -4-.
– Connect battery ⇒ page 5 .
– Install foam insert (right-side) for vehicle tool kit.
2.7 Checking battery
The following descriptions are given in ⇒ Electrical system; Gen‐
eral information; Rep. gr. 27 :
♦ Checking battery using battery tester with printer -VAS 5097A-
♦ Measuring no-load voltage - vehicles without battery monitor
control unit -J367- or energy management control unit -J644-
♦ Checking battery by measuring current draw
♦ Checking battery - vehicles with battery monitor control unit -
J367- or energy management control unit -J644-
♦ Measuring no-load voltage - vehicles with battery monitor con‐
trol unit -J367- or energy management control unit -J644-
♦ Checking battery by measuring current draw - vehicles with
battery monitor control unit -J367- or energy management
control unit -J644-
♦ Measuring no-load voltage - vehicles with battery monitor con‐
trol unit -J367- or energy management control unit -J644„transport mode not active“
♦ Measuring no-load voltage - vehicles with battery monitor con‐
trol unit -J367- or energy management control unit -J644„transport mode active“
2.8 Charging battery
The following descriptions are given in ⇒ Electrical system; Gen‐
eral information; Rep. gr. 27 :
♦ Charging battery with battery charger -VAS 5095A- , -VAS
5900- , -VAS 5903- , -VAS 5904- or -VAS 5906-
♦ Totally discharged battery
♦ Rapid-charging battery - vehicles without battery monitor con‐
trol unit -J367- or energy management control unit -J644-
♦ Back-up power supply of battery via battery charger -VAS
5095A- , -VAS 5900- , -VAS 5903- , -VAS 5904- or -VAS 5906-
♦ Maintaining battery charge with solar panel -VAS 6102 A-
8 Rep. gr.27 - Starter, current supply, CCS
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
2.9 Preparations before charging battery
Procedure
WARNING
Risk of explosion due to a discharged battery with „magic eye“.
♦ The battery must NOT be checked or charged if the indi‐
cator of the „magic eye“ is colourless or yellow. Do NOT
boost start the vehicle. There is a risk of explosion when
checking or charging the battery or boost starting the ve‐
hicle. The battery must be renewed.
Before connecting battery charger, it is necessary to perform the
following steps:
Note
The battery clamps should normally be disconnected from the
battery before charging.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Switch off ignition and all electrical equipment; then take out
ignition key.
Vehicles without positive terminal in engine compartment:
– Remove floor covering from luggage compartment.
– If fitted, remove nut -5- and disengage retainer -2- on opposite
side.
– Release retaining clips -arrows- and remove cover -1- for neg‐
ative battery terminal.
Note
If cover for negative battery terminal is located underneath rear
cross panel trim, the rear cross panel trim must be removed ⇒
Rep. gr. 70 .
– Loosen nut -4- a few turns and disconnect battery clamp -3-
of earth cable from battery terminal.
2. Battery 9
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Loosen nut -4- several turns and disconnect battery clamp
-5- of positive cable together with main fuse box from positive
battery terminal.
– Connect red clamp „+“ of battery charger to positive terminal
of battery and black clamp „–“ to negative terminal of battery.
Note
Disregard -items 1, 2, 3, 6-.
Vehicles with positive terminal in engine compartment:
– Open cover -1- over positive battery terminal -arrow-.
– Connect red clamp „+“ -item 2- of battery charger to remote
positive terminal -3- and black clamp „–“ -item 5- to earth ter‐
minal -4-.
All models:
– Plug in mains connector of battery charger and switch on bat‐
tery charger ⇒ Electrical system; General information; Rep.
gr. 27 .
– Leave rear lid open during charging.
2.10 Preparations for back-up power supply
of battery
Procedure
Before connecting battery charger, it is necessary to perform the
following steps:
– Switch off ignition and all electrical equipment.
10 Rep. gr.27 - Starter, current supply, CCS
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Vehicles without positive terminal in engine compartment:
– Remove floor covering from luggage compartment.
– If fitted, remove nut -5- and disengage retainer -2- on opposite
side.
– Release retaining clips -arrows- and remove cover -1- for neg‐
ative battery terminal.
Note
♦
If cover for negative battery terminal is located underneath
rear cross panel trim, the rear cross panel trim must be re‐
moved ⇒ Rep. gr. 70 .
♦
Disregard -items 3, 4-.
– Connect red clamp „+“ of battery charger to positive battery
clamp „+“ -item 1- and black clamp „–“ to negative battery
clamp „–“ -item 2-.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Vehicles with positive terminal in engine compartment:
– Open cover -1- over positive battery terminal -arrow-.
– Connect red clamp „+“ -item 2- of battery charger to remote
positive terminal -3- and black clamp „–“ -item 5- to earth ter‐
minal -4-.
All models:
– Plug in mains connector of battery charger and switch on bat‐
tery charger ⇒ Electrical system; General information; Rep.
gr. 27 .
2.11 Removing and installing battery isola‐
tion igniter -N253-
If battery isolation igniter -N253- is defective or has tripped, renew
battery isolation igniter -N253- ⇒ Rep. gr. 69 .
2. Battery 11
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
3 Removing and installing alternator
Observe notes on contact corrosion ⇒ page 1 .
3.1 Exploded view of alternator
1 - Bolt
❑ 23 Nm
2 - Alternator
❑ Removing and instal‐
ling:
♦ Audi TT and TTS with
2.0 ltr. TFSI engine
⇒ page 12
♦ Audi TTRS with 2.5 ltr. TFSI
engine ⇒ page 14
♦ Audi TT with 3.2 ltr. MPI en‐
gine ⇒ page 16
♦ Audi TT with 2.0 ltr. TDI en‐
gine ⇒ page 19
3 - Sliding bush
❑ Ensure that bushes
slide freely, as the
clamping pressure of a
stiff bush will be insuffi‐
cient even when the cor‐
rect tightening torque is
applied
4 - Electrical connector
5 - Nut
❑ 15 Nm
6 - Cap
7 - Terminal 30/B+
3.2 Audi TT and TTS with 2.0 ltr. TFSI en‐
gine
Special tools and workshop equipment required
12 Rep. gr.27 - Starter, current supply, CCS
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
♦ Locking pin -T10060 A-
Removing
– With ignition switched off, disconnect earth cable at battery
⇒ page 4 .
– Lift activated charcoal filter out of bracket -arrow- and place it
aside with hoses still attached.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Caution
Risk of breakage if the poly V-belt runs in the opposite direction
when refitted.
♦ Before removing, mark direction of operation of poly V-belt
with chalk or felt-tipped pen in preparation for re-installa‐
tion.
– To slacken poly V-belt, turn tensioner in direction of -arrow-.
– Lock the poly V-belt tensioner using the locking pin -T10060
A- .
– Take off poly V-belt.
– Remove poly V-belt tensioner -arrows-.
3. Removing and installing alternator 13
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Unscrew bolts -arrows- for alternator approx. 6 turns.
– Tap carefully on bolt heads with a hammer to release sliding
bushes securing alternator.
– Remove bolts.
– Detach alternator from bracket for ancillaries.
– Swivel alternator towards right side of vehicle with electrical
wiring still connected.
– Unplug electrical connector -2-.
– Unscrew electrical wiring -1- and clamp -3- from alternator.
– Lift out alternator.
Installing
• Tightening torques ⇒ page 12
Installation is carried out in the reverse order; note the following:
Note
You must ensure that the bushes slide freely, as the clamping
pressure of a stiff bush will be insufficient even when the correct
tightening torque is applied.
– To facilitate positioning of alternator, drive back sliding bushes
for securing bolts slightly.
– Fit poly V-belt on pulleys of crankshaft, air conditioner com‐
pressor and alternator.
– Install tensioner for poly V-belt ⇒ Rep. gr. 13 .
– Check correct positioning of poly V-belt.
– Connect battery. Steps required ⇒ page 5 .
– Start engine and check that belt runs properly.
3.3 Audi TT RS with 2.5 ltr. TFSI engine
Removing
– With ignition switched off, disconnect earth cable at battery
⇒ page 4 .
– Remove poly V-belt tensioner for alternator and coolant pump
⇒ Rep. gr. 13 .
– Remove bolt -2- for coolant pipe (right-side).
Note
Disregard -items 1, 3-.
14 Rep. gr.27 - Starter, current supply, CCS
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Remove bolt -arrow- at retaining clip.
– Unscrew bolts -1- and detach idler roller.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Unplug electrical connector -3-.
– Pry off protective cap -2- and unscrew nut -1- for terminal 30/
B+.
– Unscrew nut -4- and pull off clamp.
– Remove bolts -arrows-.
– Lift out alternator.
3. Removing and installing alternator 15
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Note
♦
If alternator sticks in bracket, apply a 1/2 inch socket (19 mm)
-item 1- at sliding bush.
♦
Screw a bolt (M8x45) into sliding bush and then pull bush out
of alternator by screwing in bolt.
Installing
• Tightening torques ⇒ page 12
Installation is carried out in the reverse order; note the following:
Note
You must ensure that the bushes slide freely, as the clamping
pressure of a stiff bush will be insufficient even when the correct
tightening torque is applied.
– To facilitate positioning of alternator, drive back sliding bushes
for securing bolts slightly.
– Install poly V-belt tensioner for alternator and coolant pump ⇒
Rep. gr. 13 .
– Install coolant pipe (right-side) ⇒ Rep. gr. 19 .
– Connect battery. Steps required ⇒ page 5 .
– Start engine and check that belt runs properly.
3.4 Audi TT with 3.2 ltr. MPI engine
Special tools and workshop equipment required
♦ Locking pin -T10060 A-
16 Rep. gr.27 - Starter, current supply, CCS
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Removing
– With ignition switched off, disconnect earth cable at battery
⇒ page 4 .
Caution
Risk of breakage if the poly V-belt runs in the opposite direction
when refitted.
♦ Before removing, mark direction of operation of poly V-belt
with chalk or felt-tipped pen in preparation for re-installa‐
tion.
– Slacken poly V-belt by turning tensioner in direction of
-arrow- and lock tensioner using locking pin -T10060 A- .
– Take off poly V-belt.
– Remove front wheel (right-side).
– Release fasteners -1 … 4- and remove noise insulation (cen‐
tre).
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Remove noise insulation (right-side) -arrows-.
– Unplug electrical connector -1- for magnetic clutch at air con‐
ditioner compressor and move wiring clear.
WARNING
Risk of injury due to refrigerant.
♦ Do not open refrigerant circuit of air conditioner.
– Remove bolts -arrows- for air conditioner compressor.
– Tie up air conditioner compressor to frame for noise insulation
(front) with refrigerant hoses connected.
3. Removing and installing alternator 17
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Detach cap (if fitted) and unscrew wiring -1- at alternator.
– Unplug electrical connector -2-.
Note
Disregard -item 3-.
– Remove upper idler roller -1-.
– Unscrew bolts -2 and 3- for alternator approx. 6 turns.
– Tap carefully on bolt heads with a hammer to release bushes
securing alternator.
– Remove bolts.
Note
To remove alternator from engine compartment, turn alternator
so that pulley is pointing upwards.
– Remove alternator from below.
Installing
• Tightening torque ⇒ page 12
Installation is carried out in the reverse order; note the following:
Note
♦
You must ensure that the bushes slide freely, as the clamping
pressure of a stiff bush will be insufficient even when the cor‐
rect tightening torque is applied.
♦
Before fitting poly V-belt, make sure all ancillary units (alter‐
nator, air conditioner compressor) are firmly secured.
– To facilitate positioning of alternator, drive back sliding bushes
for securing bolts slightly.
– Install air conditioner compressor ⇒ Rep. gr. 87 .
18 Rep. gr.27 - Starter, current supply, CCS
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Fit poly V-belt onto:
1 - Idler roller
2 - Vibration damper
3 - Coolant pump
4 - Tensioning roller
5 - Alternator
6 - Idler roller
7 - Air conditioner compressor
– Check correct positioning of poly V-belt.
– Connect battery. Steps required ⇒ page 5 .
– Start engine and check that belt runs properly.
3.5 Audi TT with 2.0 ltr. TDI engine
Special tools and workshop equipment required
♦ Locking pin -T10060 A-
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Removing
– With ignition switched off, disconnect earth cable at battery
⇒ page 4 .
– Release fasteners -1 … 4- and remove noise insulation (cen‐
tre).
– Remove front right wheel housing liner ⇒ Rep. gr. 66 .
– Remove radiator cowl ⇒ Rep. gr. 19 .
3. Removing and installing alternator 19
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
Caution
Risk of breakage if the poly V-belt runs in the opposite direction
when refitted.
♦ Before removing, mark direction of operation of poly V-belt
with chalk or felt-tipped pen in preparation for re-installa‐
tion.
– To slacken poly V-belt turn tensioner clockwise -arrow-.
– Secure tensioner with locking pin -T10060 A- .
– Take off poly V-belt.
– Unplug electrical connector -2- at air conditioner compressor
regulating valve -N280- .
Caution
Risk of damage to air conditioner compressor and refrigerant
lines/hoses.
♦ Take care to avoid straining, kinking or bending refrigerant
lines/hoses.
– Unscrew bolts -arrows- and detach air conditioner compressor
-1- (with refrigerant lines still connected).
Engine generation I:
– Detach engine cover panel -arrows-.
20 Rep. gr.27 - Starter, current supply, CCS
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Remove bolts -1- and -3-.
– Unplug electrical connector -4-.
– Unfasten clamp -5- at intake manifold flap motor -V157- and
pull off air pipe -2-.
Engine generation II:
– Detach engine cover panel -arrows-.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
– Remove bolts -arrows-.
– Move clear coolant hose -3-.
– Release hose clip -2-.
– Unplug electrical connector -1- at charge pressure sender -
G31- / intake air temperature sender -G42- and detach air pipe
(right-side).
3. Removing and installing alternator 21
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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Audi TT 2007 ➤
Electrical system - Edition 11.2010
All engines (continued):
– Loosen bolt -1-.
– Remove nut -2- and bolt -3-.
– Detach hose retainer -arrow- from fuel filter and place fuel filter
-8- to one side (with fuel hoses -4 … 7-connected).
– Remove bolt -2-.
– Swivel alternator forwards and unplug electrical connector
-3-.
– Pry off protective cap -2- and unscrew nut -1- for terminal 30/
B+.
– Unscrew nut -4- and pull off clamp.
22 Rep. gr.27 - Starter, current supply, CCS
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