BMW G12 2015 Guida all'installazione
Technical�training.
Product�information.
BMW�Service
G12�Voltage�Supply�and�Bus�Systems
General�information
Symbols�used
The�following�symbol�is�used�in�this�document�to�facilitate�better�comprehension�or�to�draw�attention
to�very�important�information:
Contains�important�safety�information�and�information�that�needs�to�be�observed�strictly�in�order�to
guarantee�the�smooth�operation�of�the�system.
Information�status�and�national-market�versions
BMW�Group�vehicles�meet�the�requirements�of�the�highest�safety�and�quality�standards.�Changes
in�requirements�for�environmental�protection,�customer�benefits�and�design�render�necessary
continuous�development�of�systems�and�components.�Consequently,�there�may�be�discrepancies
between�the�contents�of�this�document�and�the�vehicles�available�in�the�training�course.
This�document�basically�relates�to�the�European�version�of�left�hand�drive�vehicles.�Some�operating
elements�or�components�are�arranged�differently�in�right-hand�drive�vehicles�than�shown�in�the
graphics�in�this�document.�Further�differences�may�arise�as�the�result�of�the�equipment�specification�in
specific�markets�or�countries.
Additional�sources�of�information
Further�information�on�the�individual�topics�can�be�found�in�the�following:
• Owner's�Handbook
• Integrated�Service�Technical�Application.
Contact:�conceptinfo@bmw.de
©2015�BMW�AG,�Munich
Reprints�of�this�publication�or�its�parts�require�the�written�approval�of�BMW�AG,�Munich
The�information�contained�in�this�document�forms�an�integral�part�of�the�technical�training�of�the
BMW�Group�and�is�intended�for�the�trainer�and�participants�in�the�seminar.�Refer�to�the�latest�relevant
information�systems�of�the�BMW�Group�for�any�changes/additions�to�the�technical�data.
Information�status:�June�2015
BV-72/Technical�Training
G12�Voltage�Supply�and�Bus�Systems
Contents
1. Bus�Systems..........................................................................................................................................................................................................................................1
1.1. Bus�overview................................................................................................................................................................................................................. 1
1.2. Main�bus�systems.................................................................................................................................................................................................3
1.2.1. K-CAN.................................................................................................................................................................................................... 3
1.2.2. PT-CAN................................................................................................................................................................................................ 4
1.2.3. FlexRay..................................................................................................................................................................................................5
1.2.4. Ethernet............................................................................................................................................................................................... 6
1.2.5. D-CAN................................................................................................................................................................................................10
1.3. Sub-bus�systems...............................................................................................................................................................................................10
1.3.1. LIN-Bus............................................................................................................................................................................................ 10
1.3.2. Local�CAN....................................................................................................................................................................................21
1.3.3. USB........................................................................................................................................................................................................ 21
1.4. Diagnosis�access�OBD2........................................................................................................................................................................ 21
2. Control�Units.................................................................................................................................................................................................................................... 22
2.1. Installation�locations�of�control�units................................................................................................................................. 22
2.2. Gateway............................................................................................................................................................................................................................ 26
2.2.1. Body�Domain�Controller�(BDC)................................................................................................................. 26
2.3. Control�units�on�the�MOST�bus................................................................................................................................................ 29
2.3.1. Head�unit....................................................................................................................................................................................... 29
2.3.2. Hi-fi�amplifier�with�MOST�bus.....................................................................................................................30
2.3.3. Rear�seat�entertainment�(RSE).................................................................................................................. 31
2.4. Control�units�on�the�K-CAN2.........................................................................................................................................................32
2.4.1. Roof�function�center�(FZD)...............................................................................................................................32
2.4.2. Tailgate�function�module�(HKFM).......................................................................................................... 32
2.4.3. Seat�modules......................................................................................................................................................................... 33
2.4.4. Seat�pneumatics�modules.................................................................................................................................33
2.5. Control�units�on�the�K-CAN3.........................................................................................................................................................34
2.5.1. Front�Light�Electronics............................................................................................................................................34
2.5.2. Rear�view�camera�(RFK)........................................................................................................................................34
2.5.3. Parking�Manoeuvre�Assist�(PMA).......................................................................................................... 35
2.5.4. Blind�spot�detection�(SWW)........................................................................................................................... 35
2.6. Control�units�on�the�K-CAN4.........................................................................................................................................................36
2.6.1. Active�Sound�Design�(ASD)............................................................................................................................36
2.6.2. Controller�(CON)................................................................................................................................................................37
2.6.3. Integrated�automatic�heating�/�air�conditioning�(IHKA)......................................... 37
2.6.4. Light�Effect�Manager�(LEM)........................................................................................................................... 38
2.6.5. Telematic�Communication�Box�(TCB)............................................................................................. 39
2.7. Control�units�on�the�K-CAN5.........................................................................................................................................................40
2.7.1. Remote�control�receiver�(FBD)...................................................................................................................40
G12�Voltage�Supply�and�Bus�Systems
Contents
2.7.2. Near�Field�Communication�NFC..............................................................................................................40
2.7.3. Wireless�charging�tray�(WCA)...................................................................................................................... 41
2.8. Control�units�on�the�Ethernet........................................................................................................................................................41
2.8.1. Active�Cruise�Control�(ACC)...........................................................................................................................41
2.8.2. Top�Rear�Side�View�Camera�(TRSVC)............................................................................................ 42
2.8.3. Camera-based�driver�support�systems�(KAFAS)........................................................... 42
2.9. Control�units�on�the�PT-CAN.........................................................................................................................................................43
2.9.1. Digital�Motor�Electronics�DME,�DME2.......................................................................................... 43
2.9.2. High-beam�assistant�(FLA).............................................................................................................................. 44
2.9.3. Instrument�panel�(KOMBI)................................................................................................................................. 44
2.9.4. Night�vision�electronics�NVE......................................................................................................................... 45
2.10. Control�units�on�the�PT-CAN2.................................................................................................................................................... 45
2.10.1. Electronic�transmission�control�(EGS)............................................................................................45
2.10.2. Gear�selector�switch�(GWS)............................................................................................................................46
2.10.3. Power�Control�Unit�(PCU).................................................................................................................................. 46
2.11. Control�units�on�the�FlexRay.......................................................................................................................................................... 47
2.11.1. Advanced�Crash�Safety�Module�(ACSM)................................................................................... 47
2.11.2. Dynamic�Stability�Control�DSC................................................................................................................. 48
2.11.3. Electric�Active�Roll�Stabilization............................................................................................................... 48
2.11.4. Electronic�Power�Steering�(EPS)............................................................................................................ 49
2.11.5. Rear�axle�slip�angle�control�(HSR).........................................................................................................50
2.11.6. Optional�equipment�system�(SAS).......................................................................................................50
2.11.7. Transfer�box.............................................................................................................................................................................. 51
2.11.8. Vertical�Dynamics�Platform�(VDP)......................................................................................................... 51
2.12. Control�units�on�the�local�CAN................................................................................................................................................... 52
2.12.1. Radar�sensor........................................................................................................................................................................... 52
2.12.2. Blind�spot�detection�(SWW2)�(secondary)...............................................................................53
3. Voltage�Supply............................................................................................................................................................................................................................. 54
3.1. Overview�of�voltage�supply............................................................................................................................................................... 54
3.1.1. System�wiring�diagram............................................................................................................................................54
3.2. Components.............................................................................................................................................................................................................. 56
3.2.1. Overview�of�luggage�compartment.....................................................................................................56
3.2.2. Overview�of�engine�compartment......................................................................................................... 57
3.2.3. Battery............................................................................................................................................................................................... 57
3.2.4. Intelligent�battery�sensor.....................................................................................................................................58
3.2.5. Battery�Safety�Terminal..........................................................................................................................................58
3.2.6. Alternator.......................................................................................................................................................................................59
3.2.7. Integrated�supply�module...................................................................................................................................59
3.2.8. Power�distribution�box,�front�right.........................................................................................................60
G12�Voltage�Supply�and�Bus�Systems
Contents
3.2.9. Power�distribution�box,�front�left............................................................................................................. 60
3.2.10. Power�distribution�box,�rear............................................................................................................................ 61
3.2.11. Body�Domain�Controller....................................................................................................................................... 61
3.2.12. PCU�with�vehicle�electrical�system�assistance�measure................................... 62
3.2.13. 24�V�Electronic�Power�Steering............................................................................................................... 62
4. Terminal�Control........................................................................................................................................................................................................................ 66
4.1. Vehicle�conditions............................................................................................................................................................................................ 66
4.2. Power�supply�terminals........................................................................................................................................................................... 69
4.3. Partial�network�operation...................................................................................................................................................................... 70
4.3.1. Prerequisites�for�partial�network�operation............................................................................. 70
4.3.2. Prerequisites�of�control�units�for�partial�network�operation...........................71
G12�Voltage�Supply�and�Bus�Systems
1.�Bus�Systems
1
1.1.�Bus�overview
Bus�overview
G12�Voltage�Supply�and�Bus�Systems
1.�Bus�Systems
2
Index Explanation
ACC Active�cruise�control
ACSM Advanced�Crash�Safety�Module
AMPT Top�Hi-Fi�amplifier
ASD Active�Sound�Design
BDC Body�Domain�Controller
CON Controller
DME Digital�Motor�Electronics
DME2 Digital�Engine�Electronics�2
DSC Dynamic�Stability�Control
EARSH Electric�Active�Roll�Stabilization�rear
EARSV Electric�Active�Roll�Stabilization�front
EGS Electronic�transmission�control
EPS Electromechanical�Power�Steering
FBD Remote�control�service
FLA High-beam�assistant
FLER Front�Light�Electronics�Right
FLEL Front�Light�Electronics�Left
FZD Roof�function�center
GWS Gear�selector
HEADUNIT Head�unit
HKFM Tailgate�function�module
HSR Rear�axle�slip�angle�control�(Rear�steering�module)
IHKA Integrated�automatic�heating�/�air�conditioning
KAFAS Camera-based�driver�support�systems
KOMBI Instrument�panel
LEM Light�Effect�Manager
NFC Near�Field�Communication
NVE Night�Vision�Electronics
PCU Power�Control�Unit
PMA Parking�Manoeuvre�Assist
RFK Reversing�camera
RSE Rear�Seat�Entertainment
RSL Radar�Sensor�Left�(avoidance�assistant)
RSR Radar�Sensor�Right�(avoidance�assistant)
SAS Optional�equipment�system
G12�Voltage�Supply�and�Bus�Systems
1.�Bus�Systems
3
Index Explanation
SMBF Seat�module,�passenger
SMBFH Seat�module,�passenger,�rear
SMFA Seat�module,�driver
SMFAH Seat�module,�driver,�rear
SPNMHL Seat�pneumatics�module�back�left
SPNMHR Seat�pneumatics�module�back�right
SPNMVL Seat�pneumatics�module�front�left
SPNMVR Seat�pneumatics�module�front�right
SWW Blind�spot�detection�(primary)
SWW2 Blind�spot�detection�(secondary)
TCB Telematic�Communication�Box
TRSVC Top�Rear�Side�View�Camera
VDP Vertical�Dynamics�Platform
VTG Transfer�box
WCA Wireless�charging�tray
ZGM Central�gateway�module
1 Start-up�node�control�units�for�starting�and
synchronizing�the�FlexRay�bus�system
2 Control�units�with�wake-up�authorization
3 Control�units�also�connected�at�terminal�15WUP
1.2.�Main�bus�systems
1.2.1.�K-CAN
The�following�K-CANs�are�used�in�the�G12:
• K-CAN2
• K-CAN3
• K-CAN4
• K-CAN5
The�control�units�on�the�K-CAN5�are�not�displayed�in�the�bus�overview�by�the
BMW�diagnosis�system�ISTA.�Diagnosis�is�performed�via�the�Body�Domain�Controller.
All�K-CAN�data�buses�have�a�data�transfer�rate�of�500kBit/s.
G12�Voltage�Supply�and�Bus�Systems
1.�Bus�Systems
4
1.2.2.�PT-CAN
The�following�PT-CANs�are�used�in�the�G12:
• PT-CAN
• PT-CAN2
The�gateway�for�the�PT-CAN2�is�located�in�the�DME.
Both�PT-CAN�data�buses�have�a�data�transfer�rate�of�500kBit/s.
Altri manuali per G12 2015
1
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