Volkswagen up! 2017 Instruction manual

Workshop Manual
up! 2017 ➤
up! 2020 ➤
Electrical system
Edition 10.2019
Service
Service Department. Technical Information

List of Workshop Manual Repair Groups
Repair Group
00 - Technical data
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.
Service
All rights reserved.
No reproduction without prior agreement from publisher.
Copyright © 2020 Volkswagen AG, Wolfsburg D4B80651A52

Contents
00 - Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Safety measures when working on vehicles with a start/stop system . . . . . . . . . . . . . . . . 1
1.2 Safety precautions when using testing and measuring instruments during a road test . . . . 1
2 Repair instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Routing and attachment of lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1 Battery - general notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Types of battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
27 - Starter, current supply, CCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Assembly overview - battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Removing and installing battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Disconnecting and connecting battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Removing and installing battery tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.5 Checking battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.6 Charging battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.7 Removing and installing earth wire with battery monitor control unit J367 . . . . . . . . . . . . 11
1.8 Adapting battery monitor control unit J367 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2 Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1 Assembly overview - alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 Removing and installing alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.3 Checking alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4 Removing and installing poly V-belt pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5 Removing and installing voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3 Starter motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.1 Assembly overview – starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2 Removing and installing starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4 Cruise control system (CCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5 Start/stop system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.1 General description - start/stop system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.2 Removing and installing voltage stabiliser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
90 - Gauges, instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1 Dash panel insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1.1 Assembly overview - dash panel insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
1.2 Removing and installing dash panel insert KX2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2 Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.1 Assembly overview - horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.2 Removing and installing treble horn H2 and bass horn H7 . . . . . . . . . . . . . . . . . . . . . . . . 43
92 - Windscreen wash/wipe system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
1 Windscreen wiper system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
1.1 Assembly overview - windscreen wiper system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
1.2 Moving wipers to service position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
1.3 Removing and installing wiper blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
1.4 Removing and installing wiper arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
1.5 Adjusting wiper arms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
1.6 Removing and installing wiper motor V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
1.7 Renewing wiper motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
Contents i

1.8 Deactivating APP function of wiper motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
1.9 Removing and installing rain and light sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2 Windscreen washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2.1 Assembly overview - windscreen washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2.2 Removing and installing washer fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
2.3 Removing and installing windscreen washer pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
2.4 Removing and installing washer jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
2.5 Adjusting spray jets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3 Rear window wiper system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.1 Assembly overview - rear window wiper system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.2 Removing and installing wiper blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.3 Removing and installing wiper arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.4 Adjusting wiper arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.5 Removing and installing rear window wiper motor V12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4 Rear window washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.1 Assembly overview - rear window washer system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.2 Removing and installing spray jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.3 Adjusting spray jet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
5 Washer fluid lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
5.1 Repairing washer fluid lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
94 - Lights, bulbs, switches - exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1 Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1.1 Assembly overview - headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
1.2 Removing and installing headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
1.3 Adjusting headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
1.4 Adjusting headlight installation position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
1.5 Removing and installing front turn signal bulb M5 / M7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
1.6 Installing repair kit for headlight housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
1.7 Converting headlights from driving on right to driving on left . . . . . . . . . . . . . . . . . . . . . . . . 79
1.8 Converting headlights from driving on left to driving on right . . . . . . . . . . . . . . . . . . . . . . . . 79
1.9 Removing and installing headlight range control motor V48 / V49 . . . . . . . . . . . . . . . . . . 79
1.10 Removing and installing dipped beam bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
1.11 Removing and installing LED modules for daytime running light and side light L176 / L177
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
1.12 Removing and installing control unit for daytime running light and side light J860 / J861
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
2 Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
2.1 Assembly overview - fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
2.2 Removing and installing fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
2.3 Removing and installing fog light bulb L22 / L23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
2.4 Adjusting fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
3 Lights in exterior mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3.1 Removing and installing turn signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3.2 Removing and installing turn signal repeater bulb L131 / L132 . . . . . . . . . . . . . . . . . . . . 87
4 Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.1 Assembly overview - tail lights in body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.2 Removing and installing bulb carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.3 Removing and installing tail light cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.4 Removing and installing tail light bulb M2 / M4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
4.5 Removing and installing rear fog light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
4.6 Removing and installing rear fog light bulb L46 / L47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
4.7 Removing and installing brake and tail light bulb M21 / M22 . . . . . . . . . . . . . . . . . . . . . . 92
4.8 Removing and installing reversing light bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
4.9 Removing and installing turn signal bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
ii Contents

5 High-level brake light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
5.1 Assembly overview - high-level brake light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
5.2 Removing and installing high-level brake light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
6 Number plate light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
6.1 Removing and installing number plate light X4 / X5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
6.2 Removing and installing bulb for number plate light X4 / X5 . . . . . . . . . . . . . . . . . . . . . . . . 97
7 Steering column switch module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7.1 Assembly overview - steering column switch module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7.2 Removing and installing steering column switch module . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.3 Removing and installing steering column electronics control unit J527 . . . . . . . . . . . . . . 101
7.4 Removing and installing base for steering column combination switch . . . . . . . . . . . . . . . . 103
7.5 Removing and installing turn signal switch E2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
7.6 Removing and installing cruise control system switch E45 . . . . . . . . . . . . . . . . . . . . . . . . 103
7.7 Removing and installing intermittent wiper switch E22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
7.8 Removing and installing ignition/starter switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
7.9 Removing and installing lock cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
7.10 Removing and installing steering lock housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.11 Removing and installing ignition key withdrawal lock solenoid N376 . . . . . . . . . . . . . . . . 108
8 Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
8.1 Assembly overview – parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
8.2 Removing and installing parking aid control unit J446 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
8.3 Removing and installing rear parking aid warning buzzer H15 . . . . . . . . . . . . . . . . . . . . . . 110
8.4 Removing and installing rear parking aid senders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
9 Emergency braking function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
9.1 Removing and installing City Emergency Braking System . . . . . . . . . . . . . . . . . . . . . . . . . . 113
96 - Lights, bulbs, switches - interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
1 Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
1.1 Removing and installing Central locking SAFELOCK function warning lamp K133 . . . . . . 115
1.2 Renewing front interior light bulb W1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
1.3 Removing and installing bulb for front reading light W13 / W19 . . . . . . . . . . . . . . . . . . . . 117
2 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
2.1 Removing and installing rotary light switch EX1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
2.2 Removing and installing headlight range control regulator E102 . . . . . . . . . . . . . . . . . . . . 120
2.3 Removing and installing switch module in middle of dash panel . . . . . . . . . . . . . . . . . . . . 120
2.4 Removing and installing Start/Stop operation button E693 . . . . . . . . . . . . . . . . . . . . . . . . 122
2.5 Removing and installing hazard warning light button E229 . . . . . . . . . . . . . . . . . . . . . . . . 122
2.6 Removing and installing heated rear window button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
2.7 Removing and installing button for driver assist systems E617 . . . . . . . . . . . . . . . . . . . . 122
2.8 Removing and installing buttons for seat heating E653 / E654 . . . . . . . . . . . . . . . . . . . . . . 123
2.9 Removing and installing mirror adjustment switch E43 / E168 . . . . . . . . . . . . . . . . . . . . . . 123
2.10 Removing and installing operating unit for window regulator in driver door E512 . . . . . . . . 123
2.11 Removing and installing front window regulator switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
2.12 Removing and installing driver side interior locking button for central locking system E308
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
2.13 Removing and installing centre console switch module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
2.14 Removing and installing button for emergency braking function . . . . . . . . . . . . . . . . . . . . 127
2.15 Removing and installing sliding sunroof adjustment regulator . . . . . . . . . . . . . . . . . . . . . . 128
2.16 Removing and installing front interior light/reading light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
2.17 Removing and installing front passenger airbag deactivated warning lamp K145 . . . . . . 132
3 Immobiliser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
3.1 Removing and installing immobiliser control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
3.2 Removing and installing immobiliser reader coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4 Front camera for assist systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
4.1 Assembly overview - front camera for assist systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
Contents iii

4.2 Removing and installing front camera for driver assist systems R242 . . . . . . . . . . . . . . . . 134
4.3 Calibrating front camera for driver assist systems R242 . . . . . . . . . . . . . . . . . . . . . . . . . . 136
5 Cigarette lighter, socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5.1 Removing and installing cigarette lighter U1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5.2 Removing and installing electric socket U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
5.3 Removing and installing bulb for illuminating cigarette lighter . . . . . . . . . . . . . . . . . . . . . . 143
97 - Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
1 Relay carriers, fuse holders, electronics boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
1.1 Removing and installing electronics box (E-box) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
1.2 Removing and installing relay and fuse holder in electronics box . . . . . . . . . . . . . . . . . . . . 146
1.3 Removing and installing relay and fuse holder behind dash panel on driver side . . . . . . . . 148
2 Control units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
2.1 Removing and installing onboard supply control unit J519 . . . . . . . . . . . . . . . . . . . . . . . . 154
2.2 Removing and installing data bus diagnostic interface J533 . . . . . . . . . . . . . . . . . . . . . . . . 155
3 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
3.1 Repairing electrical wiring harnesses and plug-in connections . . . . . . . . . . . . . . . . . . . . . . 156
4 Releasing and dismantling connector housings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
5 Repairing aerial wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
6 Vehicle diagnosis, testing and information systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
iv Contents

00 – Technical data
1 Safety information
(VRL013432; Edition 10.2019)
⇒ “1.1 Safety measures when working on vehicles with a start/
stop system”, page 1
⇒ “1.2 Safety precautions when using testing and measuring in‐
struments during a road test”, page 1
1.1 Safety measures when working on ve‐
hicles with a start/stop system
Observe the following when working on vehicles with a start/stop
system:
Risk of injury from unexpected engine/motor start
If the vehicle’s start/stop system is activated, the engine can start
unexpectedly. A message in the dash panel insert indicates
whether the start/stop system is activated.
– Deactivate start/stop system by switching off the ignition.
1.2 Safety precautions when using testing
and measuring instruments during a
road test
Observe the following if test and measuring equipment is required
during a road test:
WARNING
Risk of accident from distraction in road traffic.
– Have the test instruments and measuring equipment oper‐
ated by a second person.
CAUTION
Risk of injury from unsecured objects in vehicle.
– Secure test instruments and measuring equipment with a
suitable belt when vehicle is in motion.
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
1. Safety information 1

2 Repair instructions
⇒ “2.1 Contact corrosion”, page 2
⇒ “2.2 Routing and attachment of lines”, page 2
2.1 Contact corrosion
Contact corrosion can occur when unsuitable fasteners (bolts,
nuts, washers, etc.) are used.
For this reason, only fasteners with a special surface coating are
used.
In addition, rubber, plastic and adhesives are made of non-con‐
ductive materials.
If there is any doubt about the suitability of parts, a general rule
is to use new parts ⇒ Electronic parts catalogue .
Please note:
♦ Only use genuine replacement parts which are tested and
compatible with aluminium.
♦ Only use Volkswagen Genuine Accessories.
♦ Damage resulting from contact corrosion is not covered by the
warranty.
2.2 Routing and attachment of lines
♦ Mark lines prior to removal to prevent them from being inter‐
changed and to ensure that they are fitted in their original
positions. This applies for fuel, hydraulic and vacuum lines as
well as lines for activated charcoal filter system and electrical
wiring. Where necessary, make sketches or take photographs.
♦ To avoid damage to lines, ensure adequate clearance from all
moving or hot components in the engine compartment on ac‐
count of the confined space.
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
2 Rep. gr.00 - Technical data

3 Battery
⇒ “3.1 Battery - general notes”, page 3
⇒ “3.2 Types of battery”, page 3
3.1 Battery - general notes
All instructions and notes regarding this chapter are available un‐
der ⇒ Electrical system, General information; Rep. gr. 27 ;
Battery
3.2 Types of battery
All instructions and notes regarding this chapter are available un‐
der ⇒ Electrical system, General information; Rep. gr. 27 ;
Battery; Battery types
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
3. Battery 3

27 – Starter, current supply, CCS
1 Battery
⇒ “1.1 Assembly overview - battery”, page 4
⇒ “1.2 Removing and installing battery”, page 6
⇒ “1.3 Disconnecting and connecting battery”, page 7
⇒ “1.4 Removing and installing battery tray”, page 9
⇒ “1.5 Checking battery”, page 10
⇒ “1.6 Charging battery”, page 10
⇒ “1.7 Removing and installing earth wire with battery monitor
control unit J367 ”, page 11
⇒ “1.8 Adapting battery monitor control unit J367 ”, page 11
1.1 Assembly overview - battery
Warning notices and safety regulations
All the instructions and information for this manual are found in
the workshop manual “Electrical System, General Information”. A
link to this workshop manual is not possible at present for tech‐
nical reasons. Please select the workshop manual “Electrical
System, General Information” manually in ELSA.
Battery load test
All the instructions and information for this manual are found in
the workshop manual “Electrical System, General Information”. A
link to this workshop manual is not possible at present for tech‐
nical reasons. Please select the workshop manual “Electrical
System, General Information” manually in ELSA.
up! 2017 ➤ , up! 2020 ➤
Electrical system - Edition 10.2019
4 Rep. gr.27 - Starter, current supply, CCS