Electrical system

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on vehicles with high-voltage system
  1
• 2 Repair instructions
  3
• 2.1 Raising vehicle
  3
• 2.2 Contact corrosion
  3
• 2.3 Routing and attachment of lines
  3
• 3 Battery
  4
• 3.1 Battery - general notes
  4
• Starter, current supply, CCS
  6
• 1 Battery
  6
• 1.1 Assembly overview - battery
  6
• 1.2 Removing and installing battery
  7
• 1.3 Removing and installing earth wire with battery monitor control unit J367
  9
• 1.4 Disconnecting and connecting battery
  10
• Gauges, instruments
  12
• 1 Dash panel insert
  12
• 1.1 Assembly overview - dash panel insert
  12
• 1.2 Removing and installing dash panel insert KX2
  13
• 2 Horn
  14
• 2.1 Assembly overview - horn
  14
• 2.2 Removing and installing treble horn H2 / bass horn H7
  14
• Windscreen wash/wipe system
  16
• 1 windscreen wiper system
  16
• 1.1 Assembly overview - windscreen wiper system
  16
• 1.2 Moving wipers to service position
  18
• 1.3 Removing and installing wiper blade
  18
• 1.4 Removing and installing wiper arms
  19
• 1.5 Adjusting wiper arms
  20
• 1.6 Removing and installing wiper motor V
  20
• 2 Windscreen washer system
  21
• 2.1 Assembly overview - windscreen washer system
  21
• 2.2 Removing and installing washer fluid reservoir
  22
• 2.3 Removing and installing washer pump V5
  22
• 2.4 Removing and installing washer fluid warning contact F77
  23
• 2.5 Removing and installing washer jets
  23
• 2.6 Adjusting spray jets
  24
• Electric drive systems
  25
• 1 General warnings for working on high-voltage system
  25
• 1.1 General warnings for working on high-voltage system
  25
• 1.2 Rules for cleanliness when working on the high-voltage system
  26
• 1.3 Warning stickers
  27
• 1.4 Hazard classification for the high-voltage system
  30
• 1.5 De-energising high-voltage system
  38
• 1.6 Re-energising high-voltage system
  39
• 2 High-voltage components
  44
• 2.1 Overview of fitting locations - high-voltage components
  44
• 3 High-voltage battery unit
  45
• 3.1 Assembly overview - hybrid battery unit AX1
  45
• 3.2 Visual inspection of hybrid battery unit AX1
  46
• 3.3 Removing and installing hybrid battery unit AX1
  46
• 3.4 Raising hybrid battery unit AX1
  49
• 4 Power and control electronics for electric drive
  51
• 4.1 Assembly overview - power and control electronics for electric drive JX1
  51
• 4.2 Visual inspection of power and control electronics for electric drive JX1
  52
• 4.3 Removing and installing power and control electronics for electric drive JX1
  52
• 5 Electric drive motor
  57
• 5.1 Assembly overview - electric drive motor V141
  57
• 5.2 Removing and installing electric drive motor V141
  58
• 5.3 Removing and installing drive motor rotor position sender 1 G713
  68
• 6 High-voltage cables
  70
• 6.1 Overview of fitting locations - high-voltage cables
  70
• 6.2 Specified torques for high-voltage cables
  71
• 6.3 Removing and installing high-voltage cable for electrical air conditioner compressor P3
  72
• 6.4 Removing and installing high-voltage wiring harness for hybrid battery PX1
  73
• 6.5 Removing and installing high-voltage wiring harness for drive motor PX2
  74
• 6.6 Removing and installing high-voltage cable for high-voltage charge current distributor SX4
  75
• 6.7 Removing and installing high-voltage cable for high-voltage heater (PTC) P11
  76
• 7 Charging connection
  78
• 7.1 Assembly overview - high-voltage battery charging connection 1 U34
  78
• 7.2 Removing and installing connection 1 for charging high-voltage battery U34
  79
• 7.3 Actuator for locking element of high-voltage charging connection
  80
• 8 High-voltage charge current distributor
  81
• 8.1 Assembly overview - high-voltage charge current distributor SX4
  81
• 8.2 Removing and installing high-voltage charge current distributor SX4
  82
• Lights, bulbs, switches - exterior
  84
• 1 Headlights
  84
• 1.1 Assembly overview - headlight
  84
• 1.2 Removing and installing headlight MX1 / MX2
  85
• 1.3 Adjusting headlights
  85
• 2 Lights in exterior mirror
  87
• 2.1 Assembly overview - lights in exterior mirror
  87
• 2.2 Removing and installing turn signal
  87
• 3 Tail lights
  89
• 3.1 Assembly overview - tail lights in body
  89
• 3.2 Assembly overview - tail lights in rear lid
  90
• 3.3 Removing and installing tail light MX3 / MX4
  90
• 3.4 Removing and installing rear LED module L259
  91
• 3.5 Removing and installing centre tail light cluster MX13
  92
• 4 High-level brake light
  93
• 4.1 Assembly overview - high-level brake light
  93
• 4.2 Removing and installing high-level brake light
  93
• 5 Number plate light
  95
• 5.1 Assembly overview - number plate light
  95
• 5.2 Removing and installing number plate light X4 / X5
  96
• 6 Entry and start authorisation system
  97
• 6.1 Overview of fitting locations - entry and start authorisation system
  97
• 6.2 Removing and installing entry and start authorisation control unit J518
  98
• 6.3 Removing and installing interior aerial 1 for entry and start authorisation R138
  98
• 7 Steering column switch module
  100
• 7.1 Assembly overview - steering column switch module
  100
• 7.2 Removing and installing steering column electronics control unit J527
  101
• 7.3 Removing and installing steering column combination switch E595
  102
• 8 Parking aid
  103
• 8.1 Assembly overview – parking aid
  103
• 8.2 Removing and installing parking aid control unit J446
  104
• 8.3 Removing and installing parking aid loudspeaker R169
  104
• 8.4 Removing and installing rear parking aid senders G203 / G204 / G205 / G206
  105
• Lights, bulbs, switches - interior
  106
• 1 Lights
  106
• 1.1 Overview of fitting locations - interior lights
  106
• 1.2 Overview of fitting locations - lights in front doors
  107
• 1.3 Overview of fitting locations - lights in roof trim
  108
• 1.5 Removing and installing Central locking SAFELOCK function warning lamp K133
  110
• 1.6 Removing and installing bulb for front interior light W1
  111
• 2 Controls
  113
• 2.1 Overview of fitting locations - controls in dash panel
  113
• 2.2 Overview of fitting locations - controls in centre console
  114
• 2.3 Overview of fitting locations - controls in roof trim
  115
• 2.4 Removing and installing rotary light switch EX1
  117
• 2.5 Removing and installing controls for centre of dash panel J819
  117
• 2.6 Removing and installing Tyre Pressure Monitoring System button E226
  119
• 2.7 Removing and installing hazard warning light switch EX3
  119
• 2.8 Removing and installing electromechanical parking brake button E538
  120
• 2.9 Removing and installing the starter button E378
  120
• 2.10 Removing and installing front left/right door opener release switch E763 / E764
  121
• 2.11 Removing and installing front interior light WX1
  122
• 3 Immobiliser
  124
• 3.1 Removing and installing immobiliser reader coil D2
  124
• Wiring
  125
• 1 Relay carriers, fuse holders, electronics boxes
  125
• 1.1 Overview of fitting locations - relay carriers, fuse holders, E-boxes
  125
• 1.2 Removing and installing relay carrier, fuse holder C SC in vehicle front end
  130
• 1.3 Removing and installing fuse holder D SD under dash panel
  132
• 1.4 Removing and installing relay carrier under dash panel
  132
• 1.5 Removing and installing relay carrier, fuse holder F SF in luggage compartment
  133
• 1.6 Removing and installing fuse holder B SB on battery
  133
• 2 Select Control units
  135
• 2.1 Overview of fitting locations - control units
  135
• 2.2 Removing and installing onboard supply control unit J519
  138
• 2.3 Removing and installing data bus diagnostic interface J533
  139
• 2.4 Removing and installing telematics control unit J499
  140
• 2.5 Removing and installing charge voltage control unit for high-voltage battery J966
  141
• 2.6 Removing and installing operating range display control unit J1033
  144
• 2.7 Removing and installing data recorder J1063
  144
• 2.8 Removing and installing communication unit
  146