Electrical system

Chapter overview

• Starter, current supply, CCS
  1
• 1 Battery
  1
• 1.1 Types of battery
  1
• 1.2 Warning notices and safety regulations
  1
• 1.3 Battery terminal connection
  1
• 2 Checking battery
  2
• 3 Charging battery
  3
• 4 Disconnecting and connecting battery
  4
• 4.1 Disconnecting and connecting battery
  4
• 5 Removing and installing battery
  6
• 5.1 Removing and installing battery beneath front left seat
  6
• 5.2 Adapting battery data
  10
• 6 Battery isolation igniter N253
  11
• 6.1 Removing and installing battery isolation igniter N253
  11
• 7 Jump start point
  13
• 7.1 Removing and installing jump starting point
  13
• 8 Starter, vehicles with automatic gearbox
  15
• 8.1 Checking starter B
  15
• 8.2 Starter, vehicles with 3.0 l, 213 kW TSI engine, automatic gearbox AL8
  15
• 8.3 Starter, vehicles with 3.6 l FSI engine, 206 kW, automatic gearbox AG8
  18
• 8.4 Starter, vehicles with 4.2 l FSI engine, 265 kW, automatic gearbox AG8
  21
• 8.5 Starter, vehicles with 3.0 l, 176KW TDI engine, automatic gearbox AG8
  24
• 8.6 Starter, vehicles with 4.2 l, 250 KW TDI engine, automatic gearbox AG8
  27
• 9 Alternator
  30
• 9.1 Securing B+ (battery positive) wire to alternator
  30
• 9.2 Checking poly V-belt
  30
• 9.3 Checking alternator C
  31
• 9.4 Alternator 3.0 l, 213 kW TSI engine
  31
• 9.5 Alternator, 3.6 l FSI engine, 206 kW
  34
• 9.6 Alternator, vehicles with 4.2 l, 265 kW FSI engine
  37
• 9.7 Alternator, 3.0-l TDI engine
  40
• 9.8 Alternator, 4.2 l TDI engine, 250 kW
  43
• 9.9 Removing and installing poly V-belt pulley on alternator
  46
• 9.10 Removing and installing poly V-belt pulley with freewheel on alternator
  47
• 9.11 Voltage regulator for alternator
  49
• 10 Cruise control system (CCS)
  50
• 10.1 General description
  50
• 10.2 Activating and deactivating cruise control system (CCS)
  50
• 11 Adaptive cruise control (ACC)
  51
• 11.1 General description
  51
• 11.2 Assembly overview - adaptive cruise control (ACC)
  52
• 11.3 Removing and installing adaptive cruise control button E357
  52
• 11.4 Adaptive cruise control unit J428
  52
• 11.5 Calibrating adaptive cruise control
  56
• 11.6 Initialising adaptive cruise control
  56
• 12 Front scan system (Front Assist)
  57
• 12.1 General description
  57
• 12.2 Adaptive cruise control unit J428
  57
• 12.3 Adaptive cruise control button E357
  57
• 13 Start/stop system
  58
• 13.1 General description
  58
• 13.2 Start/stop operation switch E693
  59
• 13.3 Voltage stabiliser J532
  59
• Gauges, instruments
  61
• 1 Dash panel insert
  61
• 1.1 General description
  61
• 1.2 Removing and installing dash panel insert
  61
• 1.3 Renewing dash panel insert
  63
• 1.4 Description of back of dash panel insert
  63
• 1.5 Pin assignment of connectors on dash panel insert
  64
• 1.6 Warning lamp symbols in dash panel insert
  64
• 2 Service interval display
  66
• 2.1 Resetting service interval display
  66
• Windscreen wash/wipe system
  67
• 1 windscreen wiper system
  67
• 1.1 General description
  67
• 1.2 Deactivating APP function of wiper motor
  68
• 1.3 Assembly overview - windscreen wiper system
  68
• 1.4 Removing and installing wiper arms
  69
• 1.5 Removing and installing windscreen wiper system
  70
• 1.6 Adjusting wiper blade park position
  76
• 1.7 Removing and installing joint-free wiper
  77
• 1.8 Rain and light sensor G397
  79
• 1.9 Wiper motor control unit J400
  83
• 2 Windscreen washer system
  85
• 2.1 General description
  85
• 2.2 Assembly overview - windscreen washer system
  85
• 2.3 Removing and installing windscreen washer system reservoir
  87
• 2.4 Windscreen and rear window washer pump V59
  89
• 2.5 Windscreen washer fluid level sender G33
  90
• 2.6 Spray jets for windscreen washer system
  90
• 3 Rear window wiper system
  92
• 3.1 General description
  92
• 3.2 Assembly overview - rear window wiper system
  92
• 3.3 Removing and installing rear window wiper
  93
• 3.4 Adjusting rear window wiper park position
  95
• 3.5 Removing and installing joint-free wiper
  96
• 4 Rear window washer system
  97
• 4.1 General description
  97
• 4.2 Assembly overview - rear window washer system
  97
• 4.3 Renewing spray jet
  98
• 4.4 Adjusting spray jet
  98
• 5 Headlight washer system
  99
• 5.1 General description
  99
• 5.2 Assembly overview - headlight washer system
  99
• 5.3 Headlight washer system pump V11
  100
• 5.4 Spray jet pop-up cylinder
  101
• 5.5 Spray jet assembly
  102
• 5.6 Adjusting headlight washer system spray jets
  103
• 5.7 Bleeding headlight washer system
  103
• 6 Washer fluid line hose couplings
  104
• 7 Hose repair
  105
• Lights, bulbs, switches - exterior
  106
• 1 Operation and safety notes for gas discharge lamps
  106
• 2 Headlight with halogen bulbs
  109
• 2.1 General description
  109
• 2.2 Assembly overview - halogen headlight
  109
• 2.3 Removing and installing headlight
  111
• 2.4 Adjusting headlight installation position
  112
• 2.5 Replacing headlight bulbs
  114
• 2.6 Removing and installing headlight range control motor
  119
• 2.7 Repairing headlight retaining tabs
  120
• 2.8 Converting headlights for use when driving on the left or right
  123
• 2.9 Adjusting headlights
  126
• 3.1 General description
  127
• 3.3 Removing and installing headlight
  132
• 3.4 Adjusting headlight installation position
  134
• 3.6 Removing and installing headlight range control motor
  138
• 3.7 Dynamic cornering light control motor
  139
• 3.8 Removing and installing output module for daytime running light
  139
• 3.9 Power output module for headlight
  140
• 3.10 Gas discharge bulb control unit
  142
• 3.11 Cornering light and headlight range control unit J745
  142
• 3.12 Vehicle level sender
  144
• 3.13 Repairing headlight retaining tabs
  145
• 3.14 Converting headlights for use when driving on the left or right
  145
• 3.15 Adjusting headlights
  146
• 4 Gas discharge headlights with dynamic main beam regulation
  147
• 4.1 General description
  147
• 4.2 Assembly overview - gas discharge headlights with dynamic high beam control
  148
• 4.3 Removing and installing headlight
  151
• 4.4 Adjusting headlight installation position
  152
• 4.6 Removing and installing headlight range control motor
  157
• 4.7 Power output module for headlight
  158
• 4.8 Gas discharge bulb control unit
  160
• 4.9 Removing and installing output module
  160
• 4.10 Cornering light and headlight range control unit J745
  161
• 4.11 Vehicle level sender
  162
• 4.12 Repairing headlight retaining tabs
  163
• 4.13 Converting headlights for use when driving on the left or right
  164
• 4.14 Adjusting headlights
  164
• 5 Fog lights
  165
• 5.1 Assembly overview - fog lights
  165
• 5.2 Removing and installing fog light
  167
• 5.3 Removing and installing fog light bulb
  170
• 5.4 Checking fog lights
  171
• 5.5 Adjusting fog lights
  171
• 6 Turn signal repeater bulb and entry light in exterior mirror
  172
• 6.1 Turn signal repeater bulb
  172
• 6.2 Entry light in exterior mirror
  172
• 7 Tail light clusters
  174
• 7.1 Assembly overview - tail light cluster in side panel
  174
• 7.2 Removing and installing tail light cluster in side panel
  175
• 7.3 Removing and installing bulb carrier for tail light cluster in side panel
  176
• 7.4 Assembly overview - tail light cluster in rear lid
  176
• 7.5 Removing and installing tail light cluster in rear lid
  178
• 8 Tail light cluster with LED
  182
• 8.1 General description
  182
• 8.2 Assembly overview - tail light cluster with LEDs in side panel
  182
• 8.3 Removing and installing tail light cluster with light diodes in side panel
  183
• 8.4 Replacing bulb of rear turn signal
  184
• 8.5 Assembly overview - tail light cluster with LEDs in rear lid
  185
• 8.6 Removing and installing tail light cluster with LEDS in rear lid
  186
• 8.7 Renewing left reversing light bulb M16 or right reversing light bulb M17
  187
• 9 Rear fog lights
  189
• 9.1 Rear fog lights in rear bumper cover
  189
• 10 Number plate light
  190
• 10.1 Clipped number plate light X
  190
• 10.2 Checking number plate light X
  191
• 11 High-level brake light bulb M25
  192
• 11.1 Removing and installing bulb for high-level brake light M25
  192
• 11.2 Checking high-level brake light bulb M25
  193
• 12 Turn signal in exterior mirror
  194
• 12.1 Removing and installing turn signal repeater
  194
• 13 Steering column switch
  195
• 13.1 Assembly overview - steering column switch
  195
• 13.2 Steering column switch module
  196
• 13.3 Steering column electronics control unit J527
  197
• 14 Interface for entry and start authorisation system
  200
• 14.1 General description
  200
• 14.2 Emergency release of ignition key
  200
• 14.3 Entry and start authorisation switch E415
  201
• 14.4 Entry and start authorisation control unit J518
  202
• 14.5 Entry and start authorisation aerials and sensors
  203
• 14.6 Entry and start authorisation button E408
  207
• 15 Parking aid
  209
• 15.1 General description
  209
• 15.2 Assembly overview - parking aid
  209
• 15.3 Parking aid control unit J446
  210
• 15.4 Parking aid button E266
  213
• 15.5 Front parking aid senders
  213
• 15.6 Rear parking aid senders
  219
• 15.7 Parking aid warning buzzer
  221
• 16 Lane departure warning (Lane Assist)
  223
• 16.1 General description
  223
• 16.2 Assembly overview - lane departure warning
  224
• 16.3 Removing and installing camera control unit J852
  225
• 16.4 Removing and installing windscreen heater for lane departure warning Z67
  226
• 16.5 Calibrating camera control unit J852
  226
• 16.6 Coding camera control unit J852
  227
• 16.7 Image processing control unit J851
  227
• 16.8 Steering wheel vibration motor V331
  227
• 16.9 Pitch rate sender G752
  228
• 17 Lane change assist (Side Assist)
  230
• 17.1 General description
  230
• 17.2 Lane change assist control unit with radar sensor
  231
• 17.3 Warning lamps for lane change assist system in exterior mirror
  231
• 17.4 Calibrating lane change assistant (Side Assist)
  232
• 17.5 Lane change assist control unit final control diagnosis
  239
• 17.6 Coding lane change assist control unit
  239
• 18 Reversing camera (rear assist)
  240
• 18.1 General description
  240
• 18.2 Reversing camera R189
  240
• 18.3 Reversing camera system control unit J772
  242
• 18.4 Calibrating reversing camera
  243
• 19 Overhead view camera system
  248
• 19.1 General description
  248
• 19.2 Assembly overview - overhead view camera system
  248
• 19.3 Right overhead view camera R245 or left overhead view camera R244
  249
• 19.4 Front overhead view camera R243
  251
• 19.5 Rear overhead view camera R246
  252
• 19.6 Overhead view camera control unit J928
  253
• 19.7 Overhead view camera system button
  254
• 19.8 Calibrating overhead view camera system
  254
• Lights, bulbs, switches - interior
  269
• 1 Interior lights and switches
  269
• 1.1 Footwell lights
  269
• 2 Lights and switches in engine compartment
  271
• 2.1 Bonnet contact switch F266
  271
• 3 Lights and switches in dash panel
  272
• 3.1 Light switch E1
  272
• 3.3 Hazard warning light switch E3
  273
• 3.4 Glove compartment light W6
  274
• 3.5 Switches in centre of dash panel
  275
• 3.7 Switch for electrically adjusted steering column
  276
• 4 Lights and switches in front doors
  278
• 4.1 Removing and installing bulb for background lighting in front door L164 / L165
  278
• 4.2 Removing and installing decorative LED ring
  279
• 4.3 Driver side switch element
  280
• 4.4 Window regulator switch in front passenger door E107
  281
• 4.5 Driver side interior locking button for central locking system E308
  282
• 4.6 Front passenger side interior locking button for central locking system E309
  283
• 4.8 Rear lid remote release button E233
  285
• 4.9 Illumination for driver side/front passenger side door interior handle
  286
• 4.10 Door warning lamps
  289
• 4.11 Interior monitoring and vehicle inclination deactivation buttons
  292
• 4.12 Module for exterior mirror adjustment
  293
• 4.13 Button unit for seat with memory function
  294
• 5 Lights and switches in rear doors
  297
• 5.1 Rear left and right interior locking buttons for central locking system
  297
• 5.2 Rear left and right window regulator switch (in door)
  297
• 5.3 Ashtray illumination bulb L15
  298
• 5.4 Rear left and right interior door handle illumination bulbs
  300
• 5.6 Rear left and right door warning lamps
  302
• 6 Lights and switches in luggage compartment
  303
• 6.2 Button unit for split folding rear seat bench
  303
• 6.3 Button for lowering rear end
  304
• 6.4 Button to close rear lid in luggage compartment E406
  304
• 6.5 Warning buzzer for electric rear lid
  305
• 6.6 Luggage compartment light W3
  306
• 6.7 Rear lid light W51
  307
• 6.8 Rear lid lock unit F256
  309
• 7 Lights and switches in roof trim
  310
• 7.1 Front interior and reading light
  310
• 7.2 Front passenger reading light W13 and driver side reading light W19
  311
• 7.3 Button module for front interior/reading light
  312
• 7.4 Three-button unit in roof trim
  312
• 7.5 Sunroof switch E8
  313
• 7.6 Garage door operating unit E284
  314
• 7.7 Removing and installing illuminated vanity mirror W20 / W14
  314
• 7.8 Rear reading lights
  315
• 8 Lights and switches in centre console
  318
• 8.1 Operating unit to regulate suspension height E281 and switch for wheel alignment
  318
• 8.2 Switch module in centre console
  318
• 8.3 Electromechanical parking brake button and auto-hold button
  319
• 8.4 Heated rear seat switch with regulator
  320
• 8.5 Seat heater button
  320
• 8.6 Removing and installing light in rear centre console
  320
• 8.7 12 V socket
  321
• 8.8 Cigarette lighter U1
  321
• 9 Horn
  322
• 9.1 Removing and installing treble horn H2 and bass horn H7
  322
• 9.2 Checking treble horn H2 and bass horn H7
  322
• 10 Immobiliser
  323
• 10.1 General description
  323
• 10.2 Entry and start authorisation control unit J518
  323
• 10.3 Adapting immobiliser
  323
• 10.4 Ignition key
  323
• 10.5 Online system test
  324
• 11 Anti-theft alarm (ATA)
  325
• 11.1 General description
  325
• 11.2 Activating and deactivating anti-theft alarm
  325
• 11.3 Interior monitor deactivation switch and deactivation button for vehicle inclination sender
  326
• 11.4 Interior monitoring sensor with vehicle inclination sender
  326
• 11.5 Central locking and anti-theft alarm system aerial R47
  327
• 11.6 Alarm horn H12
  327
• Wiring
  329
• 1 Vehicle diagnosis, testing and information systems
  329
• 2 Fuse holder
  330
• 2.1 Removing and installing fuse holder
  330
• 3 Relay carriers
  332
• 3.1 Removing and installing relay carrier in driver footwell
  332
• 4 Electronics boxes
  336
• 5 Select Control units
  338
• 5.1 On-board supply control unit J519
  338
• 5.2 Data bus diagnostic interface J533
  341
• 5.3 Convenience system central control unit J393
  342
• 5.4 Trailer detector control unit J345
  347
• 5.5 Control unit for electromechanical parking brake J540
  348
• 5.6 Rear lid control unit J605
  348
• 5.7 Heated rear seats control unit J786
  349
• 6 Wiring harness and connector repairs
  351