BMW G12 2015 Technical Training Manual
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BMW G12 2015 Technical Training Manual

Voltage supply and bus systems
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Technical￿training.
Product￿information.
G12￿Voltage￿Supply￿and￿Bus￿Systems
BMW￿Service

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  • Page 1 Technical￿training. Product￿information. G12￿Voltage￿Supply￿and￿Bus￿Systems BMW￿Service...
  • Page 2 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...

  • Page 3: Table Of Contents

    G12￿Voltage￿Supply￿and￿Bus￿Systems Contents Bus￿ Systems ................................................1.1. Bus￿overview ..........................................1.2. Main￿bus￿systems ......................................... 1.2.1. K-CAN ........................................1.2.2. PT-CAN ........................................ 1.2.3. FlexRay ........................................1.2.4. Ethernet ....................................... 1.2.5. D-CAN ........................................ 1.3. Sub-bus￿systems ....................................... 1.3.1. LIN-Bus ......................................1.3.2. Local￿CAN ....................................1.3.3......................................... 1.4. Diagnosis￿access￿OBD2 ..................................Control￿Units ..............................................
  • Page 4 G12￿Voltage￿Supply￿and￿Bus￿Systems Contents 2.7.2. Near￿Field￿Communication￿NFC ......................2.7.3. Wireless￿charging￿tray￿(WCA) ........................2.8. Control￿units￿on￿the￿Ethernet ................................ 2.8.1. Active￿Cruise￿Control￿(ACC) ........................... 2.8.2. Top￿Rear￿Side￿View￿Camera￿(TRSVC) .................... 2.8.3. Camera-based￿driver￿support￿systems￿(KAFAS) ............2.9. Control￿units￿on￿the￿PT-CAN ................................. 2.9.1. Digital￿Motor￿Electronics￿DME,￿DME2 ..................2.9.2. High-beam￿assistant￿(FLA) ..........................2.9.3. Instrument￿panel￿(KOMBI) ..........................2.9.4. Night￿vision￿electronics￿NVE ......................... 2.10. Control￿units￿on￿the￿PT-CAN2 ..............................2.10.1. Electronic￿transmission￿control￿(EGS) ....................
  • Page 5 G12￿Voltage￿Supply￿and￿Bus￿Systems Contents 3.2.9. Power￿distribution￿box,￿front￿left ......................3.2.10. Power￿distribution￿box,￿rear ..........................3.2.11. Body￿Domain￿Controller ............................3.2.12. PCU￿with￿vehicle￿electrical￿system￿assistance￿measure ........3.2.13. 24￿V￿Electronic￿Power￿Steering ....................... Terminal￿Control ............................................4.1. Vehicle￿conditions ......................................4.2. Power￿supply￿terminals ................................... 4.3. Partial￿network￿operation ..................................4.3.1. Prerequisites￿for￿partial￿network￿operation ................4.3.2. Prerequisites￿of￿control￿units￿for￿partial￿network￿operation ......
  • Page 7 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems 1.1.￿Bus￿overview Bus￿overview...
  • Page 8 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Active￿cruise￿control ACSM Advanced￿Crash￿Safety￿Module AMPT Top￿Hi-Fi￿amplifier Active￿Sound￿Design Body￿Domain￿Controller Controller Digital￿Motor￿Electronics DME2 Digital￿Engine￿Electronics￿2 Dynamic￿Stability￿Control EARSH Electric￿Active￿Roll￿Stabilization￿rear EARSV Electric￿Active￿Roll￿Stabilization￿front Electronic￿transmission￿control Electromechanical￿Power￿Steering Remote￿control￿service High-beam￿assistant FLER Front￿Light￿Electronics￿Right FLEL Front￿Light￿Electronics￿Left Roof￿function￿center Gear￿selector HEADUNIT Head￿unit HKFM Tailgate￿function￿module Rear￿axle￿slip￿angle￿control￿(Rear￿steering￿module) IHKA Integrated￿automatic￿heating￿/￿air￿conditioning KAFAS Camera-based￿driver￿support￿systems KOMBI Instrument￿panel Light￿Effect￿Manager Near￿Field￿Communication...

  • Page 9: K-Can

    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 Blind￿spot￿detection￿(primary) SWW2 Blind￿spot￿detection￿(secondary) Telematic￿Communication￿Box TRSVC Top￿Rear￿Side￿View￿Camera Vertical￿Dynamics￿Platform Transfer￿box Wireless￿charging￿tray Central￿gateway￿module Start-up￿node￿control￿units￿for￿starting￿and synchronizing￿the￿FlexRay￿bus￿system Control￿units￿with￿wake-up￿authorization 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￿500 kBit/s.

  • Page 10: Can

    G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems 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￿500 kBit/s.

  • Page 11: Flexray

    G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems 1.2.3.￿FlexRay FlexRay...

  • Page 12: Ethernet

    G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Dynamic￿Stability￿Control￿(DSC) Digital￿Motor￿Electronics￿(DME)￿(only￿6-cylinder￿engines) Digital￿Motor￿Electronics￿2￿(DME2)￿(only￿8-cylinder￿engines) Transfer￿box Electronic￿Power￿Steering￿(EPS￿) Electric￿active￿roll￿stabilization￿front￿(EARSV) Digital￿Motor￿Electronics￿1￿(DME1)￿(only￿8-cylinder￿engines) Body￿Domain￿Controller￿(BDC) Vertical￿Dynamics￿Platform￿(VDP) Electric￿Active￿Roll￿Stabilization￿rear￿(EARSH) Rear￿axle￿slip￿angle￿control￿(HSR) Advanced￿Crash￿Safety￿Module￿(ACSM) Optional￿equipment￿system￿(SAS) The￿FlexRay￿overview￿includes￿all￿engine￿versions￿and￿optional￿equipment.￿The￿DME￿(item￿2)￿is present￿for￿6-cylinder￿engines.￿DME1￿(item￿7)￿and￿DME2￿(item￿3)￿are￿present￿for￿8-cylinder￿engines. The￿terminating￿resistors￿for￿line￿termination￿are￿located￿in￿the￿DME￿units￿and￿in￿the￿Body￿Domain Controller. The￿FlexRay￿has￿a￿data￿transfer￿rate￿of￿10 MBit/s. 1.2.4.￿Ethernet Ethernet￿with￿5￿lines￿or￿4￿lines Ethernet￿was￿already￿used￿with￿5￿lines￿in￿the￿F01￿for￿vehicle￿programming￿and￿for￿the￿map￿update￿of the￿navigation￿system￿(4￿data￿lines￿and￿1￿line￿for￿interface￿activation).￿In￿the￿F01￿there￿is￿an￿additional Ethernet￿connection￿from￿the￿head￿unit￿to￿the￿Rear￿Seat￿Entertainment￿(RSE)￿with￿4￿data￿lines￿for transmission￿of￿the￿navigation￿data￿for￿the￿RSE. Both￿Ethernet￿variants￿are￿comparable￿with￿the￿standard￿Ethernet￿variant￿100BASE–TX￿in￿PC networks.￿The￿Ethernet￿version￿with￿5￿lines￿is￿still￿used￿in￿the￿G12￿from￿the￿OBD2￿interface￿to￿the Body￿Domain￿Controller. Ethernet￿with￿2￿lines A￿new￿Ethernet￿with￿two￿lines￿is￿used￿for￿communication￿in￿the￿G12. This￿two-wire,￿twisted￿and￿unshielded￿bus￿line￿was￿developed￿by￿the￿OPEN￿Alliance￿BroadR-Reach. At￿BMW,￿this￿Ethernet￿is￿called￿OABR￿Ethernet￿and￿has￿been￿adapted￿for￿the￿automotive￿sector. The￿data￿rate￿for￿an￿OABR￿Ethernet￿connection￿is￿up￿to￿2￿x￿100￿Mbit/s.
  • Page 13 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Hardware￿advantages One￿advantage￿is￿the￿transmission￿of￿vehicle￿camera￿data.￿Vehicle￿cameras￿(IP-based)￿are￿not connected￿to￿one￿control￿unit￿,￿but￿several￿control￿units￿by￿Ethernet￿which￿allows￿these￿units￿to￿access the￿camera￿data￿flow￿efficiently.￿The￿network￿is￿therefore￿very￿flexible￿and￿is￿well￿prepared￿for￿the future. Another￿important￿advantage￿is￿the￿fast￿programming￿of￿control￿units.￿The￿programming￿times￿are reduced￿significantly￿via￿Ethernet.￿Whereas￿a￿CAN￿bus￿can￿only￿transmit￿data￿with￿a￿maximum￿length of￿8￿bytes￿per￿message,￿Ethernet￿messages￿have￿a￿length￿of￿over￿1500￿bytes.￿The￿user￿data￿rate￿thus increases:￿Considerably￿more￿message￿packages￿can￿be￿transmitted￿in￿a￿shorter￿period. The￿OABR￿Ethernet￿connection￿equates￿to￿additional￿weight￿and￿cost￿savings,￿due￿to￿only￿using￿2 wires. Data￿transfer For￿data￿transfer￿in￿the￿standard￿Ethernet￿100BASE-TX,￿one￿line￿pair￿is￿needed￿for￿transmitting￿data and￿one￿pair￿for￿receiving. In￿contrast￿to￿the￿standard￿Ethernet￿described￿above,￿with￿the￿OABR￿Ethernet￿the￿data￿is￿now transmitted￿with￿one￿line￿pair.￿This￿means￿with￿the￿2-wire￿OABR￿Ethernet,￿a￿simultaneous￿transmit- receive￿mode￿is￿done￿via￿each￿of￿the￿two￿single￿pair￿cables.￿The￿two￿lines￿transmit￿a￿sum￿signal differentially.￿If￿a￿line￿is￿interrupted,￿a￿signal￿can￿no￿longer￿flow￿back￿through￿the￿second￿wire￿via the￿differential￿transmission.￿A￿symmetrical￿transmission￿would￿thus￿no￿longer￿be￿possible,￿the communication￿via￿the￿data￿bus￿comes￿to￿a￿standstill. During￿the￿transmission,￿messages￿with￿100 MBit/s￿are￿transmitted￿simultaneously￿in￿both￿directions via￿the￿lines.￿In￿total,￿this￿gives￿a￿maximum￿transmission￿speed￿of￿200 MBit/s￿of￿data.￿In￿the￿transceiver, the￿transmitted￿message￿is￿subtracted￿from￿the￿bus￿signal.￿The￿result￿is￿the￿message￿of￿the￿opposite transceiver.￿A￿schematic￿diagram￿of￿the￿transceiver￿of￿the￿OABR￿Ethernet￿shows￿how￿the￿data exchange￿takes￿place: Transceiver￿in￿the￿OABR￿Ethernet￿schematic￿diagram Index Explanation Message￿from￿transceiver￿1 2A,￿2B,￿2C Message￿on￿the￿OABR￿Ethernet Subtracted￿message￿from￿transceiver￿2 Message￿from￿transceiver￿2 Subtracted￿message￿from￿transceiver￿1...
  • Page 14 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Layer￿model The￿message￿transmission￿follows￿the￿rules￿which￿were￿defined￿for￿the￿conventional￿Ethernet 100BaseTX.￿The￿bodies￿on￿the￿transmitter￿and￿receiver￿side￿must￿work￿according￿to￿these￿defined rules￿so￿that￿they￿agree￿how￿the￿data￿is￿to￿be￿processed. With￿the￿Ethernet,￿the￿Open￿Systems￿Interconnection￿model￿is￿used￿(OSI￿model). It￿comprises￿7￿layers: • Layer￿1:￿Physical￿layer￿with￿100￿MBit/s • Layer￿2:￿Link￿(device￿driver,￿hardware) • Layer￿3:￿Network￿(package￿delivery,￿routing) • Layer￿4:￿Transport￿(package￿security,￿encryption) • Layers￿5-7￿Applications￿(user￿applications￿and￿processes) For￿the￿2-wire￿Ethernet￿OABR,￿the￿following￿modules￿were￿also￿added: • Vehicle￿network￿management • Service￿discovery￿report￿(for￿the￿asynchronous￿starting￿and￿stopping￿of￿functions)
  • Page 15 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems The￿OSI￿model￿for￿the￿2-wire￿OABR￿Ethernet￿looks￿as￿follows: OSI￿model Index Explanation Applications￿(user￿applications￿and￿processes) Transport￿(package￿security,￿encryption) Network￿(package￿delivery,￿routing) Link￿=￿connection￿setup,￿interface￿(device￿driver,￿hardware) Physical￿layer￿for￿data￿transfer￿with￿2x100￿MBit/s Additional￿modules￿defined￿for￿the￿OABR￿Ethernet...

  • Page 16: D-Can

    G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Application￿of￿2-wire￿OABR￿Ethernet￿in￿the￿G12 The￿following￿control￿units￿are￿connected￿to￿the￿vehicle￿electrical￿system￿via￿2-wire￿OABR￿Ethernet￿in the￿G12: • Active￿Cruise￿Control￿(ACC) • Camera-based￿driver￿assistance￿systems￿(KAFAS) • Top￿Rear￿Side￿View￿Camera￿(TRSVC) The￿following￿control￿units￿are￿also￿connected￿to￿the￿vehicle￿electrical￿system￿via￿2-wire￿OABR Ethernet￿in￿the￿G12: • Headunit￿(HEADUNIT) • Rear￿Seat￿Entertainment￿(RSE) • Optional￿equipment￿system￿(SAS) • Telematic￿Communication￿Box￿(TCB) • Top￿Rear￿Side￿View￿Camera￿(TRSVC) 1.2.5.￿D-CAN The￿D-CAN￿has￿a￿data￿transfer￿rate￿of￿500￿kBit/s. 1.3.￿Sub-bus￿systems 1.3.1.￿LIN-Bus For￿a￿better￿overview,￿the￿LIN￿buses￿are￿divided￿up￿between￿several￿wiring￿diagrams￿for￿the￿G12.
  • Page 17 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems LIN￿bus￿overview￿in￿the￿door￿area LIN-Bus...
  • Page 18 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Body￿Domain￿Controller￿(BDC) Exterior￿mirror,￿front￿passenger￿side Memory￿seat,￿front￿passenger's￿side Power￿window￿electronics,￿passenger's￿side￿front Memory￿seat,￿passenger's￿side￿rear Switch￿for￿roller￿sunblind Power￿window￿electronics,￿passenger’s￿side￿rear Non-contact￿tailgate￿opening Power￿window￿electronics,￿driver’s￿side￿rear Switch￿for￿roller￿sunblind Memory￿switch,￿driver’s￿side￿rear Power￿window￿electronics,￿driver's￿side￿front Memory￿switch,￿driver’s￿side￿front Switch￿block,￿driver's￿door Exterior￿mirror,￿driver's￿side...
  • Page 19 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems LIN￿bus￿overview￿for￿engine￿electrical￿system￿and￿voltage￿supply LIN-Bus...
  • Page 20 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Air￿damper￿control Electric￿fan Body￿Domain￿Controller￿(BDC) Power￿Control￿Unit￿(PCU)￿500W Rear￿right￿power￿distribution￿box Power￿Control￿Unit￿(PCU)￿150￿W￿ Intelligent￿battery￿sensor￿(IBS) Alternator Digital￿Motor￿Electronics￿(DME) The￿Power￿Control￿Unit￿(PCU)￿150￿W￿is￿installed￿in￿vehicles￿with￿24￿V￿steering.
  • Page 21 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems LIN￿bus￿overview￿for￿roof￿function￿center LIN-Bus...
  • Page 22 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Rain‐light‐solar-condensation￿sensor Inside￿mirror Roof￿function￿center￿(FZD) Body￿Domain￿Controller￿(BDC) Sliding￿roofliner￿motor Interior￿lighting,￿rear Siren￿with￿tilt￿alarm￿sensor￿SINE...
  • Page 23 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems LIN￿bus￿overview￿for￿steering￿column￿switch￿cluster￿and￿operating￿units LIN-Bus...
  • Page 24 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Wiper￿motor Body￿Domain￿Controller￿(BDC) Operating￿unit,￿center￿console Audio￿operating￿facility Hazard￿warning￿switch/Intelligent￿Safety￿button Touch￿detection￿HOD￿(Hands￿Off￿Detection) Steering￿wheel￿module Multifunction￿steering￿wheel￿buttons,￿right Operating￿unit￿for￿light Steering￿column￿switch￿cluster￿(SZL) Steering￿column￿adjustment...
  • Page 25 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems LIN￿bus￿overview￿for￿integrated￿automatic￿heating/air￿conditioning￿system LIN-Bus...
  • Page 26 G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems Index Explanation Air￿freshener Ozone￿generator Blower￿motor Body￿Domain￿Controller￿(BDC) Operating￿unit,￿rear￿passenger￿compartment Stepper￿motor,￿indirect￿ventilation Stepper￿motor￿for￿blending￿flap,￿right￿rear￿passenger￿compartment Stepper￿motor￿for￿blending￿flap,￿left￿rear￿passenger￿compartment Stepper￿motor￿for￿blending￿flap,￿right Stepper￿motor￿for￿blending￿flap,￿left Stepper￿motor￿for￿air￿distribution,￿right￿rear￿passenger￿compartment Stepper￿motor￿for￿air￿distribution,￿left￿rear￿passenger￿compartment Stepper￿motor￿for￿footwell,￿right Stepper￿motor￿for￿footwell,￿left Stepper￿motor￿for￿stratification,￿right Stepper￿motor￿for￿stratification,￿left Stepper￿motor￿for￿ventilation,￿right Stepper￿motor￿for￿ventilation,￿left Stepper￿motor￿for￿defrost￿function Stepper￿motor￿for￿air￿recirculation￿function Stepper￿motor￿for￿fresh￿air Electric￿auxiliary￿heater￿(Not￿for￿US) Operating￿unit,￿air￿conditioning Touch￿operating￿unit￿in￿the￿center￿grill Integrated￿automatic￿heating￿/￿air￿conditioning￿(IHKA)

  • Page 27: Usb

    G12￿Voltage￿Supply￿and￿Bus￿Systems 1.￿Bus￿Systems 1.3.2.￿Local￿CAN The￿following￿local￿CAN￿buses￿are￿present￿in￿the￿G12￿with￿corresponding￿equipment: • Local￿CAN￿from￿electronic￿transmission￿control￿(EGS)￿to￿the￿gear￿selector￿switch￿(GWS) • Local￿CAN￿from￿the￿camera-based￿driver￿assistance￿system￿(KAFAS)￿to￿the￿Parking Manoeuvre￿Assist￿(PMA) • Local￿CAN￿from￿the￿optional￿equipment￿system￿(SAS)￿to￿the￿radar￿sensor￿right￿(RSR) • Local￿CAN￿from￿the￿optional￿equipment￿system￿(SAS)￿to￿the￿radar￿sensor￿left￿(RSL) and￿blind￿spot￿detection￿(secondary)￿(SWW2) • Local￿CAN￿from￿the￿blind￿spot￿detection￿(primary)￿(SWW)￿to￿the￿radar￿sensor￿right￿(RSR), to￿the￿radar￿sensor￿left￿(RSL)￿and￿blind￿spot￿detection￿(secondary)￿(SWW2) The￿control￿units￿on￿the￿local￿CAN￿are￿not￿displayed￿in￿the￿bus￿overview￿by￿the￿BMW￿diagnosis system￿ISTA.￿Diagnosis￿takes￿place￿via￿the￿corresponding￿primary￿control￿unit. The￿local￿CAN￿buses￿have￿a￿data￿transfer￿rate￿of￿500 kBit/s. 1.3.3.￿USB The￿following￿USB￿interfaces￿are￿provided￿in￿the￿G12￿depending￿on￿the￿vehicle￿equipment: • USB￿interface￿in￿the￿center￿console￿(standard) • USB￿interface￿in￿the￿center￿armrest • USB￿interface￿in￿the￿base￿plate • USB￿interface￿in￿Rear￿Seat￿Entertainment 1.4.￿Diagnosis￿access￿OBD2 The￿vehicle￿diagnosis￿via￿D-CAN￿is￿effected￿using￿the￿OBD2￿interface.￿The￿Ethernet￿access￿for￿the vehicle￿programming￿is￿also￿located￿in￿the￿OBD2￿interface.
  • Page 28 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.1.￿Installation￿locations￿of￿control￿units To￿provide￿a￿better￿overview,￿the￿control￿units￿are￿shown￿in￿two￿photos￿with￿different￿perspectives. All￿control￿units￿are￿shown￿in￿both￿pictures. Installation￿locations￿of￿control￿units Index Explanation Radar￿Sensor￿Right￿(RSR) Front￿Light￿Electronics￿Right￿(FLER) Digital￿Motor￿Electronics￿(DME) Electronic￿Power￿Steering￿(EPS) Digital￿Engine￿Electronics￿2￿(DME2) Night￿Vision￿Electronics￿(NVE) Body￿Domain￿Controller￿(BDC) Near￿Field￿Communication￿(NFC) Integrated￿automatic￿heating￿/￿air￿conditioning￿(IHKA) Headunit￿(HU-H2)
  • Page 29 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Index Explanation Front￿passenger￿seat￿module￿(SMBF) Controller￿(CON) High-beam￿assistant￿(FLA) Camera-based￿driver￿support￿systems￿(KAFAS) Roof￿function￿center￿(FZD) Seat￿pneumatics￿module￿front￿right￿(SPNMVR) Seat￿pneumatics￿module￿back￿right￿(SPNMHR) Telematic￿Communication￿Box￿(TCB) Trailer￿module￿AHM￿—￿Not￿for￿US Parking￿Manoeuvre￿Assist￿(PMA) Vertical￿Dynamics￿Platform￿(VDP) Tailgate￿function￿module￿(HKFM) Blind￿spot￿detection￿(SWW) Remote￿control￿service￿(FBD) Rear￿view￿camera￿(RFK) Power￿Control￿Unit￿(PCU) Light￿Effect￿Manager￿(LEM) Blind￿spot￿detection￿(secondary)￿(SWW2) Video￿module￿(VM)￿—￿Not￿for￿US Top￿Hi-Fi￿amplifier￿(AMPT) Active￿Sound￿Design￿(ASD) Rear￿climate￿control￿(Not￿for￿US) Electric￿Active￿Roll￿Stabilization￿rear￿(EARSH) Rear￿axle￿slip￿angle￿control￿(HSR) Seat￿module,￿driver,￿rear￿(SMFH) Seat￿pneumatics￿module￿back￿left￿(SPNMHL) Selective￿Catalytic￿Reduction￿(SCR)￿—￿Not￿for￿US Front￿passenger￿seat￿module,￿rear￿(SMBFH) Rear￿Seat￿Entertainment￿(RSE) Seat￿pneumatics￿module￿front￿left￿(SPNMVL) Wireless￿charging￿tray￿(WCA) Driver's￿seat￿module (SMFA) Gear￿selector￿switch￿(GWS) Advanced￿Crash￿Safety￿Module￿(ACSM) Transfer￿box...
  • Page 30 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Index Explanation Instrument￿panel￿(KOMBI) Optional￿equipment￿system￿(SAS) Dynamic￿Stability￿Control￿(DSC) Control￿unit￿for￿Top￿Rear￿Side￿View￿Camera￿(TRSVC￿) Electronic￿transmission￿control￿(EGS￿) Radar￿Sensor￿Left￿(RSL) Front￿Light￿Electronics￿Left￿(FLEL) Electric￿Active￿Roll￿Stabilization￿front￿EARSV Active￿Cruise￿Control￿(ACC) Installation￿locations￿of￿control￿units Index Explanation Radar￿Sensor￿Right￿(RSR) Front￿Light￿Electronics￿Right￿(FLER) Digital￿Motor￿Electronics￿(DME) Electronic￿Power￿Steering￿(EPS)
  • Page 31 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Index Explanation Digital￿Engine￿Electronics￿2￿(DME2) Night￿Vision￿Electronics￿(NVE) Body￿Domain￿Controller￿(BDC) Near￿Field￿Communication￿(NFC) Integrated￿automatic￿heating￿/￿air￿conditioning￿(IHKA) Headunit￿(HU-H2) Front￿passenger￿seat￿module,￿(SMBF) Controller￿(CON) High-beam￿assistant￿(FLA) Camera-based￿driver￿support￿systems￿(KAFAS) Roof￿function￿center￿(FZD) Seat￿pneumatics￿module￿front￿right￿(SPNMVR) Seat￿pneumatics￿module￿back￿right￿(SPNMHR) Telematic￿Communication￿Box￿(TCB) Trailer￿module￿(AHM)￿—￿Not￿for￿US Parking￿manoeuvre￿assist￿(PMA) Vertical￿Dynamics￿Platform￿(VDP) Tailgate￿function￿module￿(HKFM) Blind￿spot￿detection￿(SWW) Remote￿control￿service￿(FBD) Rear￿view￿camera￿(RFK) Power￿Control￿Unit￿(PCU) Light￿Effect￿Manager￿(LEM) Blind￿spot￿detection￿(secondary)￿(SWW2) Video￿module￿(VM)￿—￿Not￿for￿US Top￿Hi-Fi￿amplifier￿(AMPT) Active￿Sound￿Design￿(ASD) Rear￿climate￿control￿(Not￿for￿US) Electric￿Active￿Roll￿Stabilization￿Rear￿(EARSH) Rear￿axle￿slip￿angle￿control￿(HSR) Seat￿module,￿driver,￿rear￿(SMFH) Seat￿pneumatics￿module￿back￿left￿(SPNMHL) Selective￿Catalytic￿Reduction￿(SCR)￿—￿Not￿for￿US Front￿passenger￿seat￿module,￿rear￿(SMBFH) Rear￿Seat￿Entertainment￿(RSE)

  • Page 32: Gateway

    G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Index Explanation Seat￿pneumatics￿module￿front￿left￿(SPNMVL) Wireless￿charging￿tray￿(WCA) Driver's￿seat￿module (SMFA) Gear￿selector￿switch￿(GWS) Advanced￿Crash￿Safety￿Module￿(ACSM) Transfer￿box Instrument￿panel￿(KOMBI) Optional￿equipment￿system￿(SAS) Dynamic￿Stability￿Control￿(DSC) Control￿unit￿for￿Top￿Rear￿Side￿View￿Camera￿(TRSVC) Electronic￿transmission￿control￿(EGS) Radar￿Sensor￿Left￿(RSL) Front￿Light￿Electronics￿Left￿(FLEL) Electric￿Active￿Roll￿Stabilization￿front￿EARSV Active￿Cruise￿Control￿(ACC) 2.2.￿Gateway 2.2.1.￿Body￿Domain￿Controller￿(BDC) Body￿Domain￿Controller￿(BDC)
  • Page 33 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units BDC￿functions The￿Body￿Domain￿Controller￿BDC￿is￿responsible￿for￿the￿following￿functions: • Gateway • Electronic￿immobilizer • Terminal￿control • Central￿locking￿system • Exterior￿lights • Power￿windows • Horn • Interior￿light • Wiper￿and￿windshield￿washer￿system • Vehicle￿data￿storage • Data￿transfer￿for￿Condition￿Based￿Service￿(CBS) Fuses￿in￿the￿BDC The￿following￿components￿are￿protected￿by￿fuses￿in￿the￿BDC: • Audio￿operating￿facility • Operating￿facility￿for￿assist￿systems • Operating￿unit￿for￿light • Power￿windows • Heated￿rear￿window • Tailgate￿function￿module •...
  • Page 34 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Relay￿in￿the￿BDC The￿following￿relays￿are￿located￿in￿the￿BDC: • Terminal￿30F • Power￿window￿regulators • Central￿locking￿system • Heated￿rear￿window • Headlight￿cleaning￿system Gateway￿in￿the￿BDC The￿central￿gateway￿module￿(ZGM)￿is￿integrated￿in￿the￿BDC.￿It￿is￿viewed￿as￿a￿control￿unit￿within￿a control￿unit,￿in￿that￿the￿ZGM￿in￿the￿BDC￿behaves￿like￿an￿standalone￿control￿unit.￿The￿task￿of￿the￿ZGM is￿to￿connect￿all￿the￿data￿bus￿systems￿to￿each￿other.￿By￿connecting￿them￿in￿this￿way,￿it￿is￿possible to￿have￿and￿use￿information￿from￿the￿individual￿bus￿systems￿all￿in￿one￿location.￿The￿central￿gateway module￿is￿able￿to￿implement￿different￿protocols￿and￿speeds￿on￿other￿bus￿systems.￿The￿programming data￿for￿the￿control￿units￿are￿transmitted￿by￿Ethernet￿to￿the￿vehicle￿via￿the￿ZGM. LIN￿controller￿in￿the￿BDC The￿BDC￿is￿the￿gateway￿for￿the￿following￿components￿at￿the￿local￿interconnect￿network￿bus: • Exterior￿mirrors￿left￿and￿right • Switch￿block,￿driver's￿door,￿front￿passenger￿door • Switch￿block,￿rear￿doors￿left￿and￿right • Switch￿block,￿roller￿sunblind,￿rear￿doors￿left￿and￿right • Steering￿column￿switch￿cluster • Light￿switch • Intelligent￿Safety￿button • Audio￿operating￿facility • Inside￿mirror •...
  • Page 35 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units The￿following￿control￿units￿are￿connected￿to￿the￿BDC￿via￿LIN,￿but￿the￿BDC￿has￿only￿a￿wake-up function￿and￿not￿a￿gateway￿or￿master￿function: • Battery￿charging￿unit • Intelligent￿battery￿sensor • Electric￿fan • Active￿air-flap￿control • Digital￿Motor￿Electronics 2.3.￿Control￿units￿on￿the￿MOST￿bus 2.3.1.￿Head￿unit Head￿unit In￿addition￿to￿operation￿via￿the￿controller,￿the￿head￿unit￿can￿now￿be￿operated￿by￿touch￿via￿the￿CID￿in the￿G12.￿In￿the￿case￿of￿optional￿equipment￿gesture￿control,￿select￿functions￿can￿also￿be￿operated￿by means￿of￿gestures.
  • Page 36 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.3.2.￿Hi-fi￿amplifier￿with￿MOST￿bus The￿following￿amplifiers￿are￿used￿in￿the￿G12￿corresponding￿to￿the￿audio￿systems: • 7-channel￿amplifier￿without￿bus￿connection￿for￿Hi-Fi￿audio￿system • 9-channel￿amplifier￿for￿Top￿Hi-Fi￿audio￿system • 10-channel￿amplifier￿for￿High￿End￿audio￿system Hi-Fi￿amplifier 7-channel￿amplifier￿without￿bus￿connection. Hi-Fi￿amplifier Top￿Hi-Fi￿amplifier 9-channel￿amplifier￿with￿MOST￿bus. Top￿Hi-Fi￿amplifier...
  • Page 37 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units High￿End￿amplifier 10-channel￿amplifier￿with￿MOST￿bus. High￿End￿amplifier 2.3.3.￿Rear￿seat￿entertainment￿(RSE) Rear￿Seat￿Entertainment￿RSR The￿Rear￿Seat￿Entertainment￿(RSE)￿in￿the￿G12￿is￿equipped￿with￿a￿Blu-ray￿drive.
  • Page 38 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.4.￿Control￿units￿on￿the￿K-CAN2 2.4.1.￿Roof￿function￿center￿(FZD) Roof￿function￿center￿(FZD) Depending￿on￿the￿vehicle￿equipment￿the￿roof￿function￿center￿(FZD)￿includes￿the￿corresponding components￿for: • Alarm￿system • Control￿of￿the￿slide/tilt￿sunroof • Gesture￿recognition￿camera On￿vehicles￿with￿gesture￿control,￿the￿gesture￿recognition￿camera￿is￿installed￿in￿the￿FZD.￿The￿gesture recognition￿camera￿is￿not￿shown￿as￿a￿control￿unit￿by￿the￿BMW￿diagnosis￿system.￿Diagnosis￿takes place￿via￿the￿FZD.￿The￿gesture￿recognition￿camera￿is￿connected￿to￿the￿PT-CAN4.￿As￿a￿result,￿the￿bus signals￿do￿not￿have￿to￿be￿forwarded￿to￿another￿CAN￿bus￿by￿the￿Body￿Domain￿Controller. The￿FZD￿is￿not￿responsible￿for￿the￿control￿of￿the￿interior￿lighting.￿The￿interior￿light￿unit￿and￿the￿FZD electronics￿are￿located￿in￿the￿same￿housing. 2.4.2.￿Tailgate￿function￿module￿(HKFM) Tailgate￿function￿module￿HKFM...
  • Page 39 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units The￿control￿unit￿for￿the￿tailgate￿function￿module￿is￿responsible￿for￿control￿of￿the￿tailgate￿lift. 2.4.3.￿Seat￿modules Seat￿module The￿following￿seat￿modules￿are￿present￿corresponding￿to￿the￿vehicle￿equipment: • Driver's￿seat￿module (SMFA) • Front￿passenger￿seat￿module,￿(SMBF) • Seat￿module,￿driver,￿rear￿(SMFH) • Front￿passenger￿seat￿module,￿rear￿(SMBFH) The￿seat￿modules￿are￿responsible￿for￿activation￿of￿the￿servomotors￿in￿the￿corresponding￿seat. Depending￿on￿the￿equipment,￿there￿may￿be￿4￿identical￿seat￿modules￿installed￿in￿the￿vehicle. Encoding￿of￿the￿control￿units￿takes￿place￿by￿connection￿to￿the￿wiring￿harness.￿The￿control￿unit is￿assigned￿correspondingly￿in￿the￿vehicle￿depending￿on￿the￿additional￿ground￿encoding. 2.4.4.￿Seat￿pneumatics￿modules Seat￿pneumatics￿module￿back￿right￿SPNMHR...
  • Page 40 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units The￿following￿seat￿pneumatics￿modules￿are￿present￿corresponding￿to￿the￿vehicle￿equipment: • Seat￿pneumatics￿module￿front￿left￿(SPNMVL) • Seat￿pneumatics￿module￿front￿right￿(SPNMVR) • Seat￿pneumatics￿module￿back￿left￿(SPNMHL) • Seat￿pneumatics￿module￿back￿right￿(SPNMHR) The￿seat￿pneumatics￿modules￿are￿responsible￿for￿the￿massage￿function￿in￿the￿corresponding￿seat. Depending￿on￿the￿equipment,￿there￿may￿be￿2￿or￿4￿identical￿seat￿pneumatics￿modules￿installed￿in￿the vehicle.￿Encoding￿of￿the￿control￿units￿takes￿place￿by￿connection￿to￿the￿wiring￿harness.￿The￿control￿unit is￿assigned￿correspondingly￿in￿the￿vehicle￿depending￿on￿the￿additional￿ground￿encoding. 2.5.￿Control￿units￿on￿the￿K-CAN3 2.5.1.￿Front￿Light￿Electronics Front￿Light￿Electronics￿Right￿and￿Left The￿control￿units￿Front￿Light￿Electronics￿Right￿(FLER)￿and￿Front￿Light￿Electronics￿Left￿(FLEL)￿are installed￿in￿the￿corresponding￿headlight. The￿Front￿Light￿Electronics￿includes: • LED￿activation￿in￿the￿corresponding￿headlight • Activation￿of￿the￿stepper￿motor￿for￿the￿headlight￿beam￿throw￿adjustment 2.5.2.￿Rear￿view￿camera￿(RFK) For￿the￿series￿introduction￿of￿the￿G12,￿a￿rear￿view￿camera￿on￿the￿K-CAN3￿will￿be￿used.￿Changeover￿to Ethernet￿will￿take￿place￿at￿a￿later￿date.
  • Page 41 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.5.3.￿Parking￿Manoeuvre￿Assist￿(PMA) Parking￿manoeuvring￿assistant￿PMA The￿PMA￿control￿unit￿performs￿the￿corresponding￿functions￿depending￿on￿equipment: • Park￿Distance￿Control￿PDC￿(standard) • Parking￿Manoeuvre￿Assist￿(SA5DP) Park￿Distance￿Control￿(PDC)￿assists￿the￿driver￿when￿manoeuvring￿in￿and￿out￿of￿a￿parking￿space. The￿current￿distance￿from￿an￿obstruction￿is￿indicated￿by￿acoustic￿signals￿and￿on￿a￿visual￿display. The￿Parking￿Manoeuvring￿Assistant￿makes￿it￿easier￿to￿park￿in￿parking￿spaces. In￿a￿vehicle￿with￿Parking￿Manoeuvre￿Assist￿(PMA)￿all￿sensors￿of￿the￿Park￿Distance￿Control￿(PDC)￿are used.￿In￿addition,￿there￿is￿a￿sensor￿for￿the￿PMA￿in￿each￿case￿on￿the￿left￿and￿right￿of￿the￿front￿and￿rear bumper￿panels. 2.5.4.￿Blind￿spot￿detection￿(SWW) blind￿spot￿detection￿SWW...
  • Page 42 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Both￿control￿units￿for￿blind￿spot￿detection￿SWW￿(primary)￿and￿SWW2￿(secondary)￿are￿shown￿in￿the picture.￿The￿SWW￿(primary)￿control￿unit￿is￿located￿on￿the￿right.￿The￿control￿unit￿SWW2￿(secondary) is￿on￿the￿left. The￿control￿unit￿for￿blind￿spot￿detection￿SWW￿is￿required￿for￿the￿following￿optional￿equipment: • Driving￿Assistant￿Plus￿(Blind￿spot￿detection) • Driving￿Assistant￿Plus￿II￿(Blind￿spot￿detection￿and￿Side￿collision￿warning) The￿SWW￿is￿the￿primary￿control￿unit￿which￿is￿also￿used￿for￿diagnosis￿of￿the￿additional￿control￿units connected￿to￿the￿local￿CAN￿buses. The￿following￿additional￿control￿units￿are￿required￿for￿the￿optional￿equipment￿Driving￿Assistant￿Plus: • Radar￿Sensor￿Left • Radar￿Sensor￿Right 2.6.￿Control￿units￿on￿the￿K-CAN4 2.6.1.￿Active￿Sound￿Design￿(ASD) Active￿Sound￿Design￿ASD The￿control￿unit￿for￿Active￿Sound￿Design￿generates￿the￿engine￿sound￿for￿the￿vehicle￿interior.￿The engine￿sound￿is￿calculated￿according￿to￿the￿programmed￿sound￿specification￿and￿various￿parameters such￿as￿the￿accelerator￿pedal￿angle￿(driver's￿desired￿load),￿engine￿speed￿and￿torque.￿It￿is￿then￿output via￿the￿vehicle's￿own￿audio￿system￿in￿the￿passenger￿compartment.
  • Page 43 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.6.2.￿Controller￿(CON) Controller￿CON The￿controller￿with￿touchpad￿is￿used￿in￿the￿G12.￿In￿the￿touch￿control￿panel,￿the￿customer￿can￿input location￿information￿for￿the￿navigation￿system￿or￿telephone￿numbers￿and￿contact￿details.￿In￿the￿map operation￿the￿map￿section￿for￿example￿can￿be￿moved￿and￿enlarged￿or￿reduced￿by￿finger￿movement. 2.6.3.￿Integrated￿automatic￿heating￿/￿air￿conditioning￿(IHKA) Integrated￿automatic￿heating￿/￿air￿conditioning￿(IHKA) The￿integrated￿automatic￿heating/air￿conditioning￿system￿IHKA￿is￿standard￿equipment￿in￿the￿G12.
  • Page 44 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.6.4.￿Light￿Effect￿Manager￿(LEM) Light￿Effect￿Manager￿(LEM) The￿control￿unit￿LEM￿is￿responsible￿for￿controlling￿the￿following￿lighting￿systems: • Panorama￿glass￿roof • Light￿Sabers￿on￿the￿B-pillars • Speaker￿covers￿in￿the￿High￿End￿audio￿system The￿LEM￿is￿also￿responsible￿for￿controlling￿the￿BMW￿Touch￿Command￿snap-in￿adaptor￿via￿LIN￿bus: • Release￿and￿locking • Lighting • Charge￿conditions...
  • Page 45 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.6.5.￿Telematic￿Communication￿Box￿(TCB) Telematic￿Communication￿Box￿(TCB) The￿2nd￿generation￿Telematic￿Communication￿Box￿(TCB2)￿is￿installed￿in￿the￿G12.￿The￿Telematic Communication￿Box￿(TCB2)￿is￿connected￿directly￿to￿the￿roof-mounted￿aerial￿and￿is￿responsible for￿the￿following￿functions: • BMW￿Assist￿with￿eCall￿(emergency-call￿function) • BMW￿Online • BMW￿Internet￿using￿a￿SIM￿card￿integrated￿in￿the￿vehicle￿(P-SIM) • Remote￿functions￿(reception￿and￿controller) • "Speech-to-text"￿function￿in￿Office￿area • BMW￿Tele￿Services￿via￿P-SIM...
  • Page 46 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.7.￿Control￿units￿on￿the￿K-CAN5 2.7.1.￿Remote￿control￿receiver￿(FBD) Remote￿control￿receiver The￿control￿unit￿remote￿control￿receiver￿(FBD)￿is￿responsible￿for￿communication￿of￿the￿remote￿control services.￿It￿receives￿the￿data￿of￿the￿wheel￿electronics￿for￿the￿tire￿pressure￿control. The￿control￿unit￿FBD￿is￿not￿shown￿in￿the￿bus￿overview￿by￿the￿BMW￿diagnosis￿system￿ISTA.￿Diagnosis is￿performed￿via￿the￿Body￿Domain￿Controller. 2.7.2.￿Near￿Field￿Communication￿NFC Near￿Field￿Communication￿NFC The￿control￿unit￿Near￿Field￿Communication￿(NFC)￿is￿required￿for￿Near￿Field￿Communication in￿the￿vehicle. The￿control￿unit￿NFC￿is￿not￿shown￿in￿the￿bus￿overview￿by￿the￿BMW￿diagnosis￿system￿ISTA. Diagnosis￿is￿performed￿via￿the￿Body￿Domain￿Controller.
  • Page 47 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.7.3.￿Wireless￿charging￿tray￿(WCA) Wireless￿charging￿tray￿(WCA) The￿control￿unit￿Wireless￿Charging￿Tray￿(WCA)￿monitors￿the￿charging￿tray￿and￿controls￿the￿charging procedure. The￿control￿unit￿WCA￿is￿not￿shown￿in￿the￿bus￿overview￿by￿the￿BMW￿diagnosis￿system￿ISTA.￿Diagnosis is￿performed￿via￿the￿Body￿Domain￿Controller. 2.8.￿Control￿units￿on￿the￿Ethernet 2.8.1.￿Active￿Cruise￿Control￿(ACC) Active￿Cruise￿Control￿ACC The￿control￿unit￿Active￿Cruise￿Control￿for￿ACC￿Stop&Go￿is￿a￿radar-based￿sensor￿for￿sensing the￿area￿in￿front￿of￿the￿vehicle.￿Both￿the￿near￿and￿far￿ranges￿are￿monitored￿by￿one￿sensor.
  • Page 48 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.8.2.￿Top￿Rear￿Side￿View￿Camera￿(TRSVC) Top￿Rear￿Side￿View￿Camera￿(TRSVC) The￿control￿unit￿Top￿Rear￿Side￿View￿Camera￿receives￿the￿picture￿information￿from￿the￿following cameras: • Front￿camera • Exterior￿mirror￿camera,￿left • Exterior￿mirror￿camera,￿right • Reversing￿camera The￿cameras￿are￿connected￿to￿the￿TRSVC￿via￿Ethernet. 2.8.3.￿Camera-based￿driver￿support￿systems￿(KAFAS) The￿control￿unit￿camera-based￿driver￿support￿systems￿(KAFAS)￿is￿required￿for￿the￿following￿optional equipment:...
  • Page 49 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Camera-based￿driver￿support￿systems￿(KAFAS) • Camera-based￿cruise￿control￿with￿Stop&Go￿function • Traffic￿Jam￿Assist • Road￿sign￿recognition • Tailgate￿warning • Person￿recognition￿with￿city￿braking￿function • Collision￿warning￿with￿city￿braking￿function 2.9.￿Control￿units￿on￿the￿PT-CAN 2.9.1.￿Digital￿Motor￿Electronics￿DME,￿DME2 Digital￿Motor￿Electronics￿DME￿and￿DME2 The￿illustration￿shows￿the￿DME￿and￿DME2￿control￿units.￿The￿DME2￿control￿unit￿is￿on￿the￿left￿side (seen￿in￿the￿direction￿of￿travel).
  • Page 50 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units The￿DME￿is￿responsible￿for￿the￿control￿of￿the￿combustion￿engine.￿In￿addition,￿the￿DME￿is￿the￿gateway between￿PT-CAN￿and￿PT-CAN2. The￿DME￿control￿unit￿is￿installed￿for￿6-cylinder￿engines. The￿DME2￿is￿an￿additional￿control￿unit￿installed￿for￿8-cylinder￿engines. 2.9.2.￿High-beam￿assistant￿(FLA) High-beam￿assistant￿(FLA) On￿vehicles￿without￿camera-based￿driver￿assistance￿systems￿KAFAS,￿the￿control￿unit￿for￿the high-beam￿assistant￿is￿integrated￿in￿the￿interior￿mirror.￿On￿vehicles￿with￿KAFAS,￿the￿function￿of the￿high-beam￿assistant￿is￿performed￿by￿the￿camera-based￿assistance￿system. 2.9.3.￿Instrument￿panel￿(KOMBI) Instrument￿panel￿KOMBI Only￿one￿instrument￿cluster￿version￿is￿used￿in￿the￿G12: • Dynamic￿digital￿instrument￿cluster￿with￿12.3"￿TFT￿display...
  • Page 51 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.9.4.￿Night￿vision￿electronics￿NVE Night￿vision￿electronics￿NVE The￿control￿unit￿Night￿Vision￿Electronics￿receives￿picture￿information￿from￿the￿Night￿Vision￿camera. The￿picture￿information￿is￿transmitted￿via￿CVBS￿to￿the￿head￿unit￿and￿can￿be￿displayed￿in￿the￿CID￿if required. 2.10.￿Control￿units￿on￿the￿PT-CAN2 2.10.1.￿Electronic￿transmission￿control￿(EGS) Electronic￿transmission￿control￿EGS The￿control￿unit￿for￿electronic￿transmission￿control￿is￿installed￿directly￿in￿the￿automatic￿transmission.
  • Page 52 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.10.2.￿Gear￿selector￿switch￿(GWS) Gear￿selector￿switch￿GWS The￿gear￿selector￿switch￿is￿used￿for￿selecting￿a￿drive￿position. The￿bus￿connection￿is￿done￿via￿the￿PT-CAN2￿and￿an￿additional￿local￿CAN￿to￿the￿electronic transmission￿control￿(EGS). 2.10.3.￿Power￿Control￿Unit￿(PCU) The￿Power￿Control￿Unit￿is￿required: • For￿charging￿the￿auxiliary￿battery • For￿supplying￿the￿vehicle￿electrical￿system￿with￿the￿auxiliary￿battery The￿Power￿Control￿Unit￿(PCU)￿contains￿a￿DC/DC￿converter￿with￿a￿power￿of￿500￿W.
  • Page 53 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units The￿preconditions￿for￿the￿direction￿of￿the￿energy￿management￿are￿calculated￿from￿the￿use￿of￿the vehicle.￿The￿auxiliary￿battery￿is￿charged￿by￿the￿PCU￿when￿the￿engine￿is￿running.￿During￿the￿phases in￿which￿the￿combustion￿engine￿is￿not￿running,￿e.g.￿automatic￿engine￿start-stop￿function,￿the￿PCU supplies￿energy￿from￿the￿auxiliary￿battery￿to￿the￿vehicle￿electrical￿system. 2.11.￿Control￿units￿on￿the￿FlexRay 2.11.1.￿Advanced￿Crash￿Safety￿Module￿(ACSM) Crash￿Safety￿Module￿(ACSM) The￿function￿of￿the￿Advanced￿Crash￿Safety￿Module￿(ACSM)￿is￿to￿permanently￿evaluate￿all￿sensor signals￿in￿order￿to￿identify￿a￿crash￿situation.￿The￿ACSM￿evaluates￿the￿information￿from￿the￿sensors and￿then￿forwards￿corresponding￿measures￿for￿selective￿activation￿of￿the￿necessary￿restraint￿systems. The￿ACSM￿records￿the￿yaw￿rate￿and￿sends￿this￿information￿on￿the￿FlexRay￿data￿bus. No￿additional￿yaw￿sensors￿are￿therefore￿required￿for￿the￿other￿systems.
  • Page 54 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.11.2.￿Dynamic￿Stability￿Control￿DSC Dynamic￿Stability￿Control￿(DSC) 2.11.3.￿Electric￿Active￿Roll￿Stabilization Electric￿Active￿Roll￿Stabilization￿front,￿EARSV...
  • Page 55 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units Electric￿Active￿Roll￿Stabilization￿rear,￿EARSH The￿control￿units￿for￿Electric￿Active￿Roll￿Stabilization￿are￿installed￿directly￿in￿the￿corresponding actuator. 2.11.4.￿Electronic￿Power￿Steering￿(EPS) Electronic￿Power￿Steering,￿EPS The￿Electronic￿Power￿Steering￿(electromechanical￿power￿steering)￿is￿supplied￿with￿a￿voltage￿of￿12 V￿or 24 V￿depending￿on￿the￿equipment￿and￿engine￿type. An￿auxiliary￿battery,￿a￿separating￿element￿and￿a￿charging￿unit￿for￿the￿auxiliary￿battery￿are￿required￿for the￿24 V￿version.￿These￿components￿are￿installed￿in￿the￿luggage￿compartment￿of￿the￿G12. The￿steering￿angle￿information￿is￿determined￿by￿the￿EPS￿and￿made￿available￿to￿the￿other￿control￿units via￿the￿FlexRay￿bus.
  • Page 56 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.11.5.￿Rear￿axle￿slip￿angle￿control￿(HSR) Rear￿axle￿slip￿angle￿control￿HSR The￿control￿unit￿for￿slip￿angle￿control￿is￿responsible￿for￿steering￿the￿rear￿axle. 2.11.6.￿Optional￿equipment￿system￿(SAS) Optional￿equipment￿system￿(SAS) The￿optional￿equipment￿system￿control￿unit￿provides￿a￿variety￿of￿driver￿assistance￿functions.￿The￿SAS does￿not￿have￿any￿installed￿sensors.￿The￿information￿needed￿for￿the￿functions￿is￿made￿available￿by the￿corresponding￿control￿units￿and￿sensors.￿The￿SAS￿activates￿the￿control￿units￿necessary￿for￿the corresponding￿function. Possible￿functions: • Collision￿warning￿with￿city￿braking￿function • Cruise￿control￿with￿braking￿function • Person￿recognition￿with￿city￿braking￿function • Parking￿Manoeuvre￿Assist...
  • Page 57 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units • Traffic￿jam￿assist • Camera-based￿cruise￿control￿with￿Stop&Go￿function • Proactive￿driving￿assistant The￿image￿information￿required￿by￿the￿optional￿equipment￿system￿is￿provided￿by￿the￿camera-based driver￿support￿systems. 2.11.7.￿Transfer￿box Transfer￿box The￿control￿unit￿for￿the￿transfer￿box￿controls￿the￿clutch￿in￿the￿transfer￿box￿on￿vehicles￿with￿xDrive. 2.11.8.￿Vertical￿Dynamics￿Platform￿(VDP) Vertical￿Dynamics￿Platform￿VDP...
  • Page 58 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units The￿control￿unit￿Vertical￿Dynamics￿Platform￿is￿required￿for￿the￿following￿equipment: • Dynamic￿Damper￿Control • Air￿Suspension The￿VDP￿control￿unit￿tasks: • Valve￿control￿in￿the￿shock￿absorbers • Detection￿of￿vehicle￿ride￿heights￿by￿the￿ride￿height￿sensors • Control￿of￿compressor￿and￿valves￿for￿the￿air￿suspension 2.12.￿Control￿units￿on￿the￿local￿CAN The￿control￿units￿on￿the￿local￿CAN￿are￿not￿displayed￿in￿the￿bus￿overview￿by￿the￿BMW￿diagnosis system￿ISTA.￿Diagnosis￿takes￿place￿via￿the￿corresponding￿primary￿control￿unit. 2.12.1.￿Radar￿sensor Radar￿Sensor￿Left￿RSL￿and￿Radar￿Sensor￿Right￿RSR The￿control￿units￿Radar￿Sensor￿Right￿(RSR)￿and￿Radar￿Sensor￿Left￿(RSL)￿are￿installed￿at￿the￿front￿right and￿front￿left￿of￿the￿vehicle￿for￿the￿optional￿equipment￿Driver￿Assistance￿Plus￿II￿(Active￿Driving￿Assist Plus￿-￿SA5AT).
  • Page 59 G12￿Voltage￿Supply￿and￿Bus￿Systems 2.￿Control￿Units 2.12.2.￿Blind￿spot￿detection￿(SWW2)￿(secondary) Blind￿spot￿detection Both￿control￿units￿for￿blind￿spot￿detection￿SWW￿(primary)￿and￿SWW2￿(secondary)￿are￿shown￿in￿the picture.￿The￿SWW￿(primary)￿control￿unit￿is￿located￿on￿the￿right￿and￿the￿SWW2￿(secondary)￿is￿on￿the left.￿The￿two￿control￿units￿are￿connected￿with￿each￿other￿via￿a￿local￿CAN.￿Diagnose￿with￿the￿BMW diagnosis￿system￿takes￿place￿via￿the￿primary￿control￿unit.
  • Page 60 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.1.￿Overview￿of￿voltage￿supply 3.1.1.￿System￿wiring￿diagram Voltage￿supply...
  • Page 61 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply Index Explanation Digital￿Motor￿Electronics￿(DME) Starter￿motor Alternator Power￿distribution￿box,￿engine￿compartment Jump￿start￿terminal￿point Auxiliary￿battery,￿engine￿compartment Power￿distribution￿box,￿auxiliary￿battery,￿engine￿compartment Power￿distribution￿box,￿front￿right Body￿Domain￿Controller￿(BDC) Fuse￿in￿the￿Body￿Domain￿Controller CAN￿terminator Power￿distribution￿box,￿rear Fuse￿in￿the￿power￿distribution￿box,￿battery,￿right Power￿Control￿Unit￿(PCU)￿500￿W Battery￿power￿distribution￿box Battery￿safety￿terminal Battery Power￿distribution￿box,￿front￿left...

  • Page 62: Components

    G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.￿Components 3.2.1.￿Overview￿of￿luggage￿compartment Battery Index Explanation Power￿distribution￿box,￿battery,￿right Power￿distribution￿box,￿rear Power￿Control￿Unit￿(PCU)￿500￿W Power￿Control￿Unit￿(PCU)￿150￿W Power￿distribution￿box￿with￿Battery￿safety￿terminal Battery Separator Auxiliary￿battery,￿luggage￿compartment The￿vehicle￿battery￿in￿the￿G12￿is￿a￿105￿Ah￿AGM￿battery.

  • Page 63: Battery

    G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.2.￿Overview￿of￿engine￿compartment Auxiliary￿battery,￿engine￿compartment Index Explanation Power￿distribution￿box,￿engine￿compartment Auxiliary￿battery,￿engine￿compartment Power￿distribution￿box,￿auxiliary￿battery,￿engine￿compartment Jump￿start￿terminal￿point 3.2.3.￿Battery AGM￿batteries￿are￿used￿for￿the￿voltage￿supply￿in￿the￿G12. There￿may￿by￿1,￿2￿or￿3￿batteries￿in￿the￿vehicle￿depending￿on￿the￿engine￿version￿and￿vehicle equipment. • Starter￿battery￿in￿the￿luggage￿compartment￿with￿105￿Ah • Auxiliary￿battery￿in￿the￿engine￿compartment￿with￿60￿Ah • Auxiliary￿battery￿in￿the￿luggage￿compartment￿with￿12￿Ah￿for￿vehicles￿with￿24￿V￿steering An￿auxiliary￿battery￿in￿the￿engine￿compartment￿is￿used￿on￿vehicles￿with￿Electric￿Active￿Roll Stabilization,￿the￿two￿anti-roll￿bar￿actuators￿are￿supplied￿with￿power￿by￿this￿battery.￿Also,￿it￿provides assistance￿for￿the￿vehicle￿electrical￿system￿during￿engine￿off￿conditions￿(MSA).
  • Page 64 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.4.￿Intelligent￿battery￿sensor The￿Intelligent￿Battery￿Sensor￿(IBS)￿records￿the￿following￿data￿of￿the￿12 V￿battery: • Voltage • Current • Pole￿temperature The￿IBS￿performs￿the￿calculation￿and￿the￿evaluation￿of￿the￿information.￿The￿results￿are￿then￿forwarded to￿the￿superior￿control￿units￿via￿local￿interconnect￿network￿bus￿(DME￿and￿BDC). 3.2.5.￿Battery￿Safety￿Terminal Battery￿safety￿terminal The￿Battery￿Safety￿Terminal￿(BST)￿is￿activated￿in￿the￿event￿of￿an￿accident￿of￿corresponding￿severity. The￿voltage￿supply￿to￿the￿positive￿battery￿connection￿point￿in￿the￿engine￿compartment￿is￿interrupted and￿the￿consumers￿connected￿to￿this￿are￿de-energized.￿The￿Battery￿safety￿terminal￿is￿installed￿in￿the power￿distribution￿box￿next￿to￿the￿battery.

  • Page 65: Alternator

    G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.6.￿Alternator Alternators￿with￿increased￿efficiency￿are￿used￿in￿the￿G12.￿The￿increase￿in￿alternator￿efficiency￿is achieved￿by￿reducing￿the￿losses￿in￿the￿rectifier.￿The￿loss-causing￿diodes￿are￿replaced￿by￿MOSFET transistors.￿A￿reduction￿in￿fuel￿consumption￿is￿achieved￿by￿increasing￿the￿efficiency. Different￿alternators￿are￿used￿depending￿on￿the￿engine￿type￿and￿vehicle￿equipment. Versions: • Bosch￿with￿180￿A￿and￿250￿A￿for￿6-cylinder￿engines • Valeo￿with￿252￿A￿for￿8-cylinder￿engines 3.2.7.￿Integrated￿supply￿module Integrated￿supply￿module The￿engine￿control￿and￿its￿components￿are￿supplied￿with￿a￿12￿V￿voltage￿via￿the￿integrated￿supply module.
  • Page 66 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.8.￿Power￿distribution￿box,￿front￿right Power￿distribution￿box,￿front￿right A￿relay￿for￿terminal￿30B￿is￿installed￿in￿the￿front￿right￿power￿distribution￿box. Consumers￿are￿supplied￿with￿terminal￿30,￿terminal￿30B￿and￿terminal￿15N￿and￿provided￿with corresponding￿fuse￿protection￿by￿the￿front￿right￿power￿distribution￿box.￿Terminal￿15N￿is￿supplied from￿the￿front￿power￿distribution￿box￿by￿the￿rear￿power￿distribution￿box. 3.2.9.￿Power￿distribution￿box,￿front￿left Power￿distribution￿box,￿front￿left A￿relay￿for￿terminal￿30B￿is￿installed￿in￿the￿front￿left￿power￿distribution￿box. The￿front￿left￿power￿distribution￿box￿supplies￿consumers￿with￿terminal￿30￿and￿terminal￿30B￿as￿well￿as corresponding￿fuse￿protection.
  • Page 67 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.10.￿Power￿distribution￿box,￿rear Power￿distribution￿box,￿rear The￿following￿relays￿are￿installed￿in￿the￿rear￿power￿distribution￿box: • 1￿or￿2￿terminal￿30F￿relays • 2￿terminal￿30B￿relays • 1￿terminal￿15N￿relay • 1￿relay￿for￿rear￿window￿heating All￿relays￿are￿bi-stable￿relays.￿The￿relays￿area￿activated￿by￿the￿Body￿Domain￿Controller￿via￿LIN. The￿hard-wired￿terminal￿30B￿relays￿of￿the￿two￿front￿power￿distribution￿boxes￿are￿activated via￿the￿rear￿power￿distribution￿box. 3.2.11.￿Body￿Domain￿Controller The￿Body￿Domain￿Controller￿(BDC)￿is￿responsible￿for￿the￿terminal￿control. A￿terminal￿30F￿relay￿is￿installed￿in￿the￿BDC. A￿number￿of￿consumers￿are￿supplied￿with￿terminal￿30,￿terminal￿30F,￿and￿provided￿with￿corresponding fuse￿protection￿via￿the￿BDC.
  • Page 68 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply 3.2.12.￿PCU￿with￿vehicle￿electrical￿system￿assistance￿measure On￿vehicles￿with￿the￿equipment￿Electric￿Active￿Roll￿Stabilization,￿energy￿is￿supplied￿by￿the￿auxiliary battery￿in￿the￿engine￿compartment. Modern￿vehicles￿have￿a￿high￿energy￿consumption￿due￿to￿the￿many￿electrical￿consumers.￿As￿a￿result, there￿is￿a￿high￿demand￿on￿the￿battery￿particularly￿in￿phases￿in￿which￿the￿combustion￿engine￿is￿not running￿and￿the￿alternator￿supplies￿no￿energy￿(e.g.￿engine￿start-stop￿phases). In￿order￿to￿protect￿the￿battery,￿a￿DC/DC￿converter￿is￿installed￿in￿the￿Power￿Control￿Unit￿(PCU)￿and￿an auxiliary￿battery￿is￿installed￿in￿the￿engine￿compartment. The￿preconditions￿for￿the￿direction￿of￿the￿energy￿management￿are￿calculated￿from￿the￿use￿of￿the vehicle.￿When￿the￿engine￿is￿running￿the￿auxiliary￿battery￿is￿charged￿from￿the￿conventional￿vehicle electrical￿system.￿During￿the￿phases￿in￿which￿the￿combustion￿engine￿is￿not￿running,￿e.g.￿automatic engine￿start-stop￿function,￿the￿conventional￿vehicle￿electrical￿system￿is￿supplied￿by￿the￿auxiliary battery. The￿Power￿Control￿Unit￿(PCU)￿is￿connected￿to￿the￿PT-CAN2￿and￿a￿DC/DC￿converter￿with￿a￿power of￿500 W. 3.2.13.￿24￿V￿Electronic￿Power￿Steering The￿higher￿weight￿8-cylinder￿engine￿in￿the￿G12￿results￿in￿a￿higher￿front￿axle￿load.￿This￿increases￿the effort￿that￿is￿required￿by￿the￿power￿steering￿servo.￿Due￿to￿these￿high￿currents,￿it￿is￿necessary to￿increase￿the￿voltage￿supply￿of￿the￿EPS￿to￿24 V. An￿auxiliary￿battery,￿separating￿element￿and￿a￿charging￿unit￿for￿the￿auxiliary￿battery￿are￿required￿for this.￿These￿components￿are￿installed￿in￿the￿luggage￿compartment￿of￿the￿G12. The￿charging￿unit￿monitors￿the￿state￿of￿charge￿and￿charges￿the￿auxiliary￿battery￿using￿a￿DC/DC converter.￿It￿monitors￿a￿line￿shield￿of￿the￿24￿V￿line￿and￿various￿other￿conditions.￿The￿charging￿unit￿also switches￿the￿relay￿in￿the￿separating￿element,￿which￿integrates￿the￿auxiliary￿battery￿in￿the￿circuit.￿The EPS￿is￿supplied￿with￿24￿V￿only￿once￿this￿relay￿has￿been￿switched￿on.￿The￿EPS￿can￿also￿be￿operated with￿12 V￿in￿the￿event￿of￿a￿fault.
  • Page 69 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply Voltage￿supply￿for￿24￿V￿steering...
  • Page 70 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply Index Explanation Dynamic￿Stability￿Control￿(DSC) Digital￿Motor￿Electronics￿(DME) Electronic￿Power￿Steering￿(electromechanical￿power￿steering)￿(EPS￿) Fuse￿in￿the￿power￿distribution￿box,￿front￿right Body￿Domain￿Controller￿(BDC) Fuse￿in￿the￿rear￿power￿distribution￿box Power￿Control￿Unit￿(PCU)￿150￿W Separator Auxiliary￿battery￿in￿the￿luggage￿compartment Fuse￿in￿the￿power￿distribution￿box,￿battery Advanced￿Crash￿Safety￿Module￿(ACSM) Brake￿light￿switch Steering￿column￿switch￿cluster￿(SZL) Instrument￿panel￿(KOMBI) Auxiliary￿battery￿with￿separating￿element Battery￿and￿separating￿element Index Explanation Auxiliary￿battery￿in￿the￿luggage￿compartment Separator...
  • Page 71 G12￿Voltage￿Supply￿and￿Bus￿Systems 3.￿Voltage￿Supply Power￿Control￿Unit 150 W￿Power￿Control￿Unit The￿Power￿Control￿Unit￿monitors￿the￿state￿of￿charge￿and￿also￿charges￿the￿auxiliary￿battery￿using a￿DC/DC￿converter.
  • Page 72 G12￿Voltage￿Supply￿and￿Bus￿Systems 4.￿Terminal￿Control The￿terminal￿control￿in￿the￿G12￿is￿different￿from￿other￿BMW￿models.￿The￿terminals￿are￿controlled￿via a￿customer-oriented￿condition￿management.￿In￿the￿G12,￿based￿on￿the￿customer’s￿point￿of￿view,￿the vehicle￿is￿always￿in￿the￿right￿condition.￿The￿terminal￿control￿is￿dependent￿on￿the￿driving￿conditions. 4.1.￿Vehicle￿conditions The￿G12￿vehicle￿may￿be￿in￿the￿following￿conditions: • PARKING￿(asleep) • RESIDING￿(awake) • DRIVING￿(ready) The￿different￿vehicle￿functions￿are￿possible￿corresponding￿to￿the￿respective￿conditions. PARKING￿(asleep) • Customer￿not￿in￿the￿vehicle • Vehicle￿secured￿or￿not￿used￿for￿a￿certain￿time • Vehicle￿functions￿cannot￿be￿operated RESIDING￿(awake) • Customer￿in￿the￿vehicle • No￿driving￿readiness • Functions￿that￿are￿relevant￿when￿the￿vehicle￿is￿stationary￿can￿be￿operated DRIVING￿(ready) • Customer￿in￿the￿vehicle • Driving￿readiness￿established • All￿functions￿are￿available The￿driving￿conditions￿are￿changed￿by￿the￿condition￿management￿taking￿into￿account￿the￿customer behavior.￿Additional￿information￿is￿also￿evaluated￿to￿help￿determine￿the￿vehicle￿condition,￿e.g.: • Door￿opening •...
  • Page 73 G12￿Voltage￿Supply￿and￿Bus￿Systems 4.￿Terminal￿Control The￿following￿diagram￿shows￿the￿changes￿between￿the￿vehicle￿conditions. Vehicle￿conditions Index Explanation Vehicle￿condition￿PARKING￿(asleep) Transitional￿condition￿with￿stationary￿functions Vehicle￿condition￿RESIDING￿(awake) Transitional￿condition￿for￿establishing￿driving￿readiness or￿ending￿driving￿readiness￿or￿TESTING/ANALYSIS/DIAGNOSIS￿(PAD) Vehicle￿condition￿DRIVING￿(ready) Unlock￿vehicle Operation￿of￿start/stop￿button￿+￿brake￿pedal Press￿START-STOP￿button Lock￿vehicle No￿activity￿of￿a￿vehicle￿user￿detected￿for￿3 minutes Extended￿press...
  • Page 74 G12￿Voltage￿Supply￿and￿Bus￿Systems 4.￿Terminal￿Control Detailed￿overview￿of￿vehicle￿conditions. Overview￿of￿vehicle￿conditions Index Explanation Vehicle￿condition￿DRIVING￿(ready) Vehicle￿condition￿RESIDING￿(awake) Vehicle￿condition￿PARKING￿(asleep) Transitional￿condition￿for￿establishing/ending￿driving readiness￿—TESTING/ANALYSIS/DIAGNOSIS￿(PAD) Transitional￿condition￿with￿STATIONARY￿FUNCTIONS...
  • Page 75 G12￿Voltage￿Supply￿and￿Bus￿Systems 4.￿Terminal￿Control Index Explanation Operation￿of￿start/stop￿button￿+￿brake￿pedal￿+￿valid remote￿control￿or￿valid￿ID￿transmitter￿in￿the￿vehicle￿interior Driving￿readiness￿established,￿terminal￿15N￿(terminal￿50) Operation￿of￿start/stop￿button￿(three￿times￿within￿0,8￿s)￿+￿valid remote￿control￿or￿valid￿ID￿transmitter￿in￿the￿vehicle￿interior Terminal￿15N Operation￿of￿start/stop￿button￿+￿selector￿lever￿in￿Neutral Unbuckling￿driver's￿seat￿belt￿(v￿<￿0.1￿km/h,￿driver's￿door￿opened, selector￿lever￿not￿in￿Neutral,￿brake￿not￿pressed,￿low￿beam￿off,￿no￿OBD communication,￿no￿diagnosis￿mode,￿no￿assembly￿mode) Door￿contact￿change￿(v￿<￿0.1￿km/h,￿driver's￿seat￿belt￿undone, selector￿lever￿not￿in￿Neutral,￿brake￿not￿pressed,￿low￿beam￿off,￿no￿OBD communication,￿no￿diagnosis￿mode,￿no￿assembly￿mode) Press￿start/stop￿button￿+￿vehicle￿is￿stationary￿or￿press￿start/stop button￿for￿at￿least￿1 s￿+￿driving￿speed￿≥￿10￿km/h￿or￿press￿start/stop button￿at￿least￿three￿times￿within￿4 s￿+￿driving￿speed￿≥￿10￿km/h Press￿START-STOP￿button Terminal￿30B Unlock￿vehicle Residing￿interaction￿or￿stationary￿function￿interaction Lock￿vehicle No￿customer￿interaction￿for￿3￿minutes Extended￿press￿of￿head￿unit￿media￿button Terminal￿30F 4.2.￿Power￿supply￿terminals Control￿units￿in￿the￿vehicle￿must￿be￿supplied￿with￿power￿only￿when￿they￿are￿needed.￿The￿following terminals￿are￿used￿in￿the￿G12: • Terminal￿15N • Terminal￿30B • Terminal￿30F • Terminal￿30 Terminal￿15N￿supplies￿control￿units￿which￿are￿needed￿only￿when￿driving￿and￿which￿may￿be￿needed￿to safely￿end￿a￿journey.￿After-run￿of￿5￿s￿starts￿at￿the￿transition￿from￿DRIVING￿to￿RESIDING.
  • Page 76 Terminal￿30F￿is￿normally￿switched￿on￿in￿PARKING￿condition,￿but￿may￿be￿switched￿off￿due￿to￿faults in￿the￿vehicle￿electrical￿system.￿The￿terminal￿is￿switched￿off￿with￿an￿after-running￿period￿of￿1￿min if￿a￿fault￿is￿detected. Terminal￿30￿control￿units￿(e.g.￿alarm￿system)￿are￿always￿supplied￿with￿voltage￿and￿are￿also￿not switched￿off￿in￿the￿event￿of￿a￿fault. Terminal￿30F Terminal￿30B Terminal￿15N PARKING,￿vehicle electrical￿system￿not OK￿(fault￿in￿vehicle electrical￿system) PARKING,￿vehicle electrical￿system￿OK Stationary￿functions, customer￿not￿in vehicle RESIDING DRIVING Testing￿Analysis￿Diagnosis￿(PAD) The￿vehicle￿condition￿Testing/Analysis/Diagnosis￿is￿still￿present￿for￿diagnosis.￿All￿terminals￿are switched￿on￿in￿this￿mode.￿This￿ensures￿that￿diagnosis￿can￿be￿performed￿with￿all￿control￿units. This￿vehicle￿condition￿is￿displayed￿in￿the￿BMW￿diagnosis￿system. 4.3.￿Partial￿network￿operation Today's￿premium￿vehicles￿contain￿up￿to￿70￿control￿units￿with￿well￿over￿100￿microcontrollers￿which￿are networked￿with￿each￿other.￿However,￿depending￿on￿the￿current￿vehicle￿condition￿or￿the￿vehicle￿user requirement,￿not￿all￿convenience￿and￿assistance￿systems￿need￿to￿be￿energized. It￿is￿possible￿to￿save￿energy,￿relieve￿the￿load￿on￿the￿battery￿and￿also￿prolong￿the￿battery￿life￿by￿targeted deactivation￿and￿activation￿on￿control￿units￿which￿are￿not￿needed,￿so-called￿selective￿partial￿network operation. If￿functions￿are￿not￿used￿or￿needed￿when￿driving,￿seat￿adjustment￿for￿example,￿the￿corresponding control￿units￿can￿be￿switched￿off. In￿vehicles￿with￿combustion￿engines,￿the￿electrical￿energy￿consumption￿is￿indirectly￿linked￿to￿the￿fuel consumption￿via￿the￿alternator.￿As￿a￿result,￿selective￿deactivation￿of￿control￿units￿that￿are￿not￿currently needed￿can￿contribute￿to￿reducing￿fuel￿consumption￿and￿thus￿also￿CO ￿emissions. 4.3.1.￿Prerequisites￿for￿partial￿network￿operation The￿partial￿network￿master￿in￿the￿Body￿Domain￿Controller￿calculates￿a￿partial￿network￿status￿on the￿basis￿of￿the￿current￿vehicle￿condition￿and￿the￿required￿functions.￿The￿control￿units￿that￿are￿not required￿are￿switched￿off￿by￿means￿of￿the￿corresponding￿bus￿messages.
  • Page 77 G12￿Voltage￿Supply￿and￿Bus￿Systems 4.￿Terminal￿Control 4.3.2.￿Prerequisites￿of￿control￿units￿for￿partial￿network￿operation Different￿transceivers￿are￿used￿in￿order￿to￿determine￿partial￿network￿operation￿in￿control￿units.￿These transceivers￿are￿able￿to￿evaluate￿and￿interpret￿messages.￿A￿control￿unit￿remains￿switched￿off￿as￿long as￿bus￿communication￿takes￿place￿without￿a￿valid￿wake-up￿event￿for￿the￿corresponding￿control￿unit.￿If a￿valid￿wake-up￿event￿for￿the￿corresponding￿control￿unit￿is￿sent￿on￿the￿bus,￿the￿transceiver￿can￿activate the￿voltage￿regulator￿of￿the￿microcontroller￿and￿the￿control￿unit￿starts￿up.￿The￿control￿unit￿is￿switched off￿by￿deactivation￿of￿the￿voltage￿regulator.
  • Page 78 Bayerische￿Motorenwerke￿Aktiengesellschaft Qualifizierung￿und￿Training Röntgenstraße￿7 85716￿Unterschleißheim,￿Germany...

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