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Technical�training.Product�information.
BMW�Service
F11�General�vehicle�electrical�system
General�notes
Symbols�used
The�following�symbol/pictograph�is�used�in�this�document�for�better�understanding�or�to�emphasizeparticularly�important�information:
Contains�important�safety�tips�and�information�required�for�proper�system�function,�which�must�beobserved�under�all�circumstances.
Topicality�and�national�versions
BMW�Group�vehicles�are�designed�to�meet�the�highest�safety�and�quality�requirements.�Changingrequirements�in�areas�such�as�environmental�protection,�customer�benefit,�design�and�constructionlead�to�continuous�advancement�of�systems�and�components.�This�can�result�in�deviations�betweenthe�information�contained�in�this�document�and�the�vehicles�available�for�training.
This�document�describes�European�version�vehicles�with�left-hand�drive�as�a�matter�of�principle.�Invehicles�with�right-hand�drive�some�controls�and�components�may�be�arranged�differently�than�shownin�the�illustrations�in�this�document.�Other�deviations�may�result�from�equipment�versions�for�specificmarkets�or�countries.
Additional�information�sources
Further�information�on�the�individual�subjects�is�given:
• in�the�operating�instructions• in�the�Integrated�Service�Technical�Application:
Contact:�conceptinfo@bmw.de
©2010�BMW�AG,�Munich
Reproduction,�in�whole�or�in�part,�is�permissible�only�with�written�approval�of�BMW�AG,Munich.
The�information�contained�in�this�document�is�a�part�of�the�BMW�Group�Technical�Training�Programand�is�intended�for�trainers�and�participants�in�this�program.�Changes/supplements�to�the�technicaldata�are�given�in�the�current�BMW�Group�information�system.
Information�status:�June�2010VH-23/International�Technical�Training
F11�General�vehicle�electrical�systemContents1. Introduction............................................................................................................................................................................................................................................5
1.1. Bus�overview.................................................................................................................................................................................................................6
2. Power�supply........................................................................................................................................................................................................................................92.1. Vehicle�battery............................................................................................................................................................................................................9
3. Locking�system...........................................................................................................................................................................................................................11
4. Rear�hatch�lift.................................................................................................................................................................................................................................124.1. System�Circuit�Diagram.......................................................................................................................................................................... 12
5. Luggage�compartment�roll-up�cover..................................................................................................................................................155.1. System�Circuit�Diagram.......................................................................................................................................................................... 155.2. Function............................................................................................................................................................................................................................19
6. Tire�pressure�control�RDC.....................................................................................................................................................................................216.1. Operation........................................................................................................................................................................................................................ 21
6.1.1. Resetting�tire�pressure�values.....................................................................................................................226.1.2. Teach-in�process..............................................................................................................................................................236.1.3. Pressure�drop.........................................................................................................................................................................23
6.2. System�Circuit�Diagram.......................................................................................................................................................................... 246.3. Notes�for�service................................................................................................................................................................................................ 25
6.3.1. Removing/installing�electronic�wheel�units.............................................................................25
7. Integrated�automatic�heating/air�conditioning..................................................................................................................267.1. Evaporator�coating...........................................................................................................................................................................................26
F11�General�vehicle�electrical�system1.�Introduction.
5
The�vehicle�electrical�system�on�the�F11�is�identical�to�that�on�the�F10�with�only�few�exceptions.�Thisinformation�bulletin�lists�the�modifications�and�new�features�for�the�vehicle�electrical�system�on�theF11.
F11�General�vehicle�electrical�system1.�Introduction.
6
1.1.�Bus�overview
F11�Bus�overview
F11�General�vehicle�electrical�system1.�Introduction.
7
Index Explanation1 Wake-up�capable�control�units2 Wake-up�enabled�control�units3 Start-up�node�control�units�for�starting�and�synchronizing�FlexRay�bus�system.ACC�SEN ACC�Sensor�(Active�Cruise�Control)ACSM Advanced�Crash�Safety�ModuleAHM Trailer�ModuleAL Active�SteeringAMPT Amplifier�Top�(Top�High�Fidelity�Amplifier)BSD Bit-serial�data�interfaceBCU Battery�Charge�UnitCAS Car�Access�SystemCID Central�Information�DisplayCOMBOX Combox�(Combox�multimedia,�Combox�emergency�call)CON ControllerD-CAN Diagnose-on-Controller�Area�NetworkDDE Digital�Diesel�Electronic�control�unitDME Digital�Engine�Electronic�control�unitDSC Dynamic�Stability�ControlDVDC DVD�changerEDC�SHL Electronic�Damping�Control,�left�rear�airbag�sensorEDC�SHR Electronic�Damping�Control,�right�airbag�sensorEDC�SVL Electronic�Damping�Control,�left�front�airbag�sensorEDC�SVR Electronic�Damping�Control,�right�front�airbag�sensorEGS Electronic�transmission�controlEHC Electronic�level�controlEKPS Electronic�fuel�pump�controlEMF Electro-mechanical�parking�brakeEPS Electronic�Power�SteeringEthernet Cable-connected�local�area�networkFD Rear�compartment�control�panelFD2 Rear�compartment�control�panel�2FLA High�beam�assistFlexRay High�speed,�preset�and�error-tolerant�bus�system�for�use�in�motor�vehiclesFRM Footwell�moduleFZD Roof�function�center
F11�General�vehicle�electrical�system1.�Introduction.
8
Index ExplanationGWS Gear�selector�switchHEADUNIT Headunit�(Car�Information�Computer�or�Car�Information�Computer�Basic�II)HKL Tailgate�liftHSR Rear�axle�slip�angle�controlHUD Head-up�displayICM Integrated�Chassis�ManagementIHKA Integrated�automatic�heating/air�conditioningJBE Electronic�junction�boxKAFAS Camera-based�driver�support�systemsK-CAN Body�controller�area�networkK-CAN2 Body�controller�area�network�2�(500�kBits/s)KOMBI Electronic�instrument�clusterLIN-Bus Local�Interconnect�Network�BusMOST Media�Oriented�System�TransportNVE Night�Vision�ElectronicsPDC Park�Distance�ControlPMA Park�Maneuvering�AssistantPT-CAN Powertrain�controller�area�networkPT-CAN2 Powertrain�controller�area�network�2RDC Tire�pressure�controlOBD Diagnostic�socketRSE Rear�Seat�EntertainmentSMBF Front�Passenger�Seat�ModuleSMFA Driver's�Seat�ModuleSWW Lane�change�warningSZL Steering�column�switching�centerTRSVC Control�Unit�for�Rear�View�Camera�and�Side�ViewVDM Vertical�Dynamics�ManagementVM Video�ModuleVSW Video�SwitchZGM Central�Gateway�Module
F11�General�vehicle�electrical�system2.�Power�supply
9
2.1.�Vehicle�batteryAs�always�used�on�the�F10�an�AGM�(absorbent�glass�mat)�battery�is�used�on�the�F11�for�supplying�theelectrical�power.�The�vehicle�battery�is�installed�in�the�middle�of�the�luggage�compartment�at�the�rear.AGM�batteries�with�thee�different�capacities�are�used�depending�on�the�engine�and�equipment�in�thevehicle.
• 80�Ah• 90�Ah• 105�Ah
AGM�battery
The�battery�condition�recognition�using�the�intelligent�battery�sensor�(IBS)�was�improved�withintroduction�of�the�F10.�This�now�makes�it�possible�to�recognize�the�following�battery�states:
• Recognition�of�defective�cells�in�vehicle�battery• Determination�of�remaining�capacity�of�vehicle�battery• Battery�water�loss.
The�vehicle�battery�looses�it�capacity�from�being�highly�discharged.�This�loss�of�capacity�dependson�the�duration�and�depth�of�discharge.�By�definition�a�battery�is�discharged�highly�when�its�voltagedrops�below�the�end-point�voltage.�The�intelligent�battery�sensor�measures�the�duration�and�depth�ofdischarge�allowing�it�to�determine�the�remaining�battery�capacity.
F11�General�vehicle�electrical�system2.�Power�supply
10
Intelligent�battery�sensor
Index Explanation1 Negative�battery�terminal2 Intelligent�battery�sensor3 Negative�battery�lead
If�one�of�the�previously�mentioned�defects�is�recognized,�a�fault�is�entered�in�the�fault�memory.Moreover�the�vehicle�user�is�notified�of�a�possible�problem�by�a�Check�Control�message�requestinghim�to�"Check�the�power�supply".�The�entry�in�the�fault�memory�can�be�deleted�only�after�replacingthe�vehicle�battery.
F11�General�vehicle�electrical�system3.�Locking�system.
11
The�following�door�locks�may�be�used�on�the�F11�depending�on�the�national�version�and�specialequipment.
• Locks�without�central�locking�and�without�Hall�sensors• Locks�with�central�locking,�however,�without�Hall�sensors• Locks�without�central�locking,�however,�with�Hall�sensors• Locks�with�central�locking�and�with�Hall�sensors
The�Hall�sensors�are�required�for�recognition�of�the�key�position�of�the�lock�cylinder.�The�centrallocking�feature�separates�the�door�lock�buttons�mechanically�from�the�central�locking�drive.
For�example�on�vehicle�versions�for�Europe,�without�alarm�system�(SA�302)�and�without�ComfortAccess�(SA�322)�locks�are�installed�without�central�locking�and�with�out�Hall�sensors.
Locks�with�Hall�sensors�are�used�on�vehicles�with�Comfort�Access�(SA�322)�as�special�equipment.�Ifa�customer�orders�the�alarm�system�(SA�302)�as�special�equipment,�the�locks�are�equipped�for�thecentral�locking�function.
The�locks�for�the�automatic�Soft-Close�function�for�doors�(SA�323)�are�always�equipped�with�centrallocking�function�and�Hall�sensor.
F11�General�vehicle�electrical�system4.�Rear�hatch�lift
12
An�automatic�rear�hatch�actuation�feature�is�available�as�special�equipment�(SA�316)�on�the�F11.�Thisis�realized�using�a�spindle�drive,�installed�in�place�of�the�spring�strut�support.
The�spincle�drive�is�actuated�by�the�rear�hatch�lift�control�unit�(HKL).
F11�Rear�hatch
Index Explanation1 Spindle�drive�(only�with�automatic�rear�hatch�actuation�SA�316)1
2 Hinge�(rear�hatch)3 Hinge�(rear�window)4 Spring�strut�support�(rear�window)5 IHU�frame
1�On�vehicles�without�automatic�rear�hatch�actuation�(SA�316)�a�spring�strut�support�is�installedinstead�of�the�spindle�drive.
4.1.�System�Circuit�DiagramThe�rear�hatch�lift�control�unit�is�now�connected�over�the�K-CAN2.�In�the�F10�it�was�still�connectedover�K-CAN.
F11�General�vehicle�electrical�system4.�Rear�hatch�lift
13
F11�General�vehicle�electrical�system4.�Rear�hatch�lift
14
Index Explanation1 Central�Gateway�Module�ZGM2 Footwell�module�FRM3 Rear�hatch�button�on�A�pillar.4 Car�Access�System�CAS5 Junction�Box�Electronics�JBE6 Rear�electrical�distribution�box7 Right�spindle�drive�motor8 Rear�hatch�lift�control�unit9 Interior�rear�hatch�button�and�central�locking�button10 Rear�hatch�lock�with�rear�hatch�contact�switch�and�locking�cylinder11 Automatic�Soft�Close�system�for�rear�hatch12 Exterior�rear�hatch�button13 Rear�window�button14 Suppressor�filter15 Drive�unit�for�luggage�compartment�roll-up�cover�lifter16 Left�spindle�drive�motor17 Roll-up�cover�reed�contact18 Luggage�compartment�lights19 Antenna�Diversity�Module�with�integrated�antenna�amplifier
F11�General�vehicle�electrical�system5.�Luggage�compartment�roll-up�cover
15
A�drive�integrated�into�the�D-pillar�as�a�standard�feature�on�the�F11�moves�the�luggage�compartmentroll-up�cover.�As�soon�as�the�rear�hatch�or�separately�opening�rear�window�is�released,�the�roll-up�covermoves�up�automatically.�When�the�rear�hatch�or�rear�window�is�closed�the�roll-up�cover�moves�backdown�automatically.
In�vehicles�with�automatic�rear�hatch�actuation�(SA�316)�the�roll-up�cover�moves�up�or�down�when�therear�hatch�is�actuated�by�the�identification�sensor.
Different�versions�of�the�rear�hatch�lift�control�unit�(HKL)�may�be�used�on�vehicles�with�and�withoutautomatic�rear�hatch�actuation�(SA�316)
F11�Luggage�compartment�roll-up�cover�lifter
Index Explanation1 Luggage�compartment�roll-up�cover2 Control�cable�(right�side)3 Control�cable�(left�side)4 Drive�unit�(for�both�sides)5 Reversing�roller6 Driver
5.1.�System�Circuit�DiagramThe�rear�hatch�lift�control�unit�is�now�connected�over�the�K-CAN2.�In�the�F10�it�was�still�connectedover�K-CAN.
F11�General�vehicle�electrical�system5.�Luggage�compartment�roll-up�cover
16
Two�versions�of�the�control�unit�are�installed�depending�on�the�equipment:
• Rear�hatch�lift�control�unit�without�automatic�rear�hatch�actuation�(SA�316).• Rear�hatch�lift�control�unit�with�automatic�rear�hatch�actuation�(SA�316).
F11�General�vehicle�electrical�system5.�Luggage�compartment�roll-up�cover
17
F11�General�vehicle�electrical�system5.�Luggage�compartment�roll-up�cover
18
Index Explanation1 Central�Gateway�Module�ZGM2 Footwell�module�FRM3 Rear�hatch�button�on�A�pillar�(only�with�SA�316)4 Car�Access�System�CAS5 Junction�Box�Electronics�JBE6 Rear�electrical�distribution�box7 Right�spindle�drive�motor�(only�with�SA�316)8 Rear�hatch�lift�control�unit9 Interior�rear�hatch�button�(only�with�SA�322)�and�central�locking�button�(only
with�SA�322)10 Rear�hatch�lock�with�rear�hatch�contact�switch�and�locking�cylinder11 Automatic�Soft�Close�system�for�rear�hatch12 Exterior�rear�hatch�button13 Rear�window�button14 Suppressor�filter15 Drive�unit�for�luggage�compartment�roll-up�cover�lifter16 Left�spindle�drive�motor�(only�with�SA�316)17 Roll-up�cover�reed�contact18 Luggage�compartment�lights19 Antenna�Diversity�Module�with�integrated�antenna�amplifier
F11�General�vehicle�electrical�system5.�Luggage�compartment�roll-up�cover
19
5.2.�Function
F11�Components�for�luggage�compartment�roll-up�cover�lifter
Index Explanation1 Lifter�drive�roller2 Left�control�cable�tensioning�spring3 Right�control�cable�tensioning�spring4 Drive�unit�for�luggage�compartment�roll-up�cover�lifter5 Roll-up�cover�reed�contact
A�reed�contact�in�the�left�D-pillar�senses�whether�the�roll-up�cover�with�driver�is�hooked�in.�For�thispurpose�a�permanent�magnet�is�located�in�the�left�pin�of�the�roll-up�cover.
If�it�is�recognized�that�the�roll-up�cover�is�hooked�in�and�either�the�rear�window�or�the�rear�hatch�isopen,�the�rear�hatch�lift�control�unit�moves�the�roll-up�cover�up.
F11�General�vehicle�electrical�system5.�Luggage�compartment�roll-up�cover
20
The�driver�roller�for�the�lifting�mechanism�is�fastened�to�the�drive�unit�by�a�gear�train.�The�controlcables�for�the�left�and�right�lifters�are�wound�around�the�drive�roller�a�number�of�times.�A�tensioningspring�on�both�sides�prevents�the�control�cables�from�slipping.
Two�Hall�sensors�are�located�in�the�drive�unit.�The�Hall�sensors�determine�the�direction�of�rotationand�number�of�rotations�for�the�motor.�The�rear�hatch�lift�control�unit�stores�the�number�of�revolutionsrequired�by�stop�to�stop�during�the�teach-in�process.�In�customer�operation�the�lift�is�stopped�beforereaching�the�mechanical�stop.
The�drive�unit�for�the�roll-up�cover�has�an�anti-trap�mechanism.�This�feature�recognizes�trapping�bymeasuring�the�motor�current.
The�lean-in�procedure�is�repeated�after�replacement�of�the�rear�hatch�control�unit�or�drive�unit.
F11�General�vehicle�electrical�system6.�Tire�pressure�control�RDC.
21
As�of�09/2030�the�latest�generation�of�tire�pressure�control�RDC�(SA�2VB)�will�be�available�for�the�F11in�Europe.
6.1.�OperationThe�direct�measurement�system�consists�of�the�RDC�control�unit�with�integrated�receiving�antennaand�four�electronic�wheel�units.�Integration�of�the�receiving�antenna�into�the�RDC�control�unit�hasreduced�the�number�of�components�and�thus�the�cost�for�the�system.
F11�RDC�control�unit
The�four�electronic�wheel�units�send�a�radio�signal�(433�MHz)�with�the�tire�pressure�and�temperature�tothe�RDC�control�unit�installed�on�the�exterior�of�the�vehicle�on�the�rear�bumper.
The�electronic�wheel�units�have�two�acceleration�sensors�for�determination�of�the�direction�of�rotationand�for�activation�of�the�transmission.�The�built-in�battery�has�a�typical�service�life�of�10�years.�Theservice�life�counter�for�the�electronic�wheel�units�can�be�read�out�with�the�BMW�diagnosis�system.If�the�battery�in�one�of�the�electronic�wheel�units�is�dead,�the�customer�is�notified�by�an�RDC�faultmessage.
F11�General�vehicle�electrical�system6.�Tire�pressure�control�RDC.
22
F25�RDC�electronic�wheel�unit�Gen3
Index Explanation1 Data�matrix�code2 BMW�part�number3 FCC�ID�=�Radio�equipment�approval4 Electronic�wheel�unit�ID5 Transmission�frequency6 Pressure�sensor7 Electronic�wheel�unit�date�of�production8 Tightening�torque9 Wrench�size�for�union�nut
6.1.1.�Resetting�tire�pressure�valuesThe�tire�pressure�values�can�be�reset�with�the�controller.�The�text�message�RDC�appears�or�theintegral�RDC�indicator�light�illuminates�in�the�instrument�cluster�when�the�teach-in�processes�isstarted.
F11�General�vehicle�electrical�system6.�Tire�pressure�control�RDC.
23
6.1.2.�Teach-in�processAt�a�vehicle�speed�of�greater�than�20�km/h�the�electronic�wheel�units�send�signals�to�the�RDC�controlunit�without�being�prompted�by�a�switch-on�signal.�After�waking�up�the�electronic�wheel�units�(vehiclespeed�>�20�km/h)�a�total�of�25�telegrams�are�sent�once�at�intervals�of�two�seconds.�As�long�as�apressure�drop�is�present,�the�electronic�wheel�units�send�individual�telegrams�to�the�RDC�control�unitevery�30�seconds.�The�switch-on�conditions�for�the�electronic�wheel�units�assume�that�the�wheelshave�not�moved�for�a�period�of�time�greater�than�five�minutes.
Two�acceleration�sensors�are�installed�in�each�electronic�wheel�unit�to�determine�the�direction�ofrotation�of�the�wheel.�This�allows�recognition�of�the�position�on�the�left�or�right.�The�front�and�rearwheel�positions�are�determined�by�evaluation�of�the�RF�signal�level�from�the�electronic�wheel�units.The�receiver�is�located�behind�the�rear�axle.�The�control�unit�thus�receives�the�signals�from�the�rearaxle�at�a�higher�level�than�those�from�the�front�axle.
A�complete�teach-in�process�requires�between�approx.�30-40�seconds�(when�the�switch-onconditions�are�fulfilled)�up�to�a�maximum�of�ten�minutes.�If�the�RDC�tire�pressure�control�is�reset�whiledriving,�approx.�four�minutes�are�required�for�the�teach-in�process.
The�text�message�RDC�or�the�integral�RDC�indicator�light�disappears�when�the�teach-in�processes�iscompleted.�Four�green�tire�symbols�are�then�displayed�on�the�central�information�display.
F11�RDC�display
6.1.3.�Pressure�dropAfter�completion�of�the�teach-in�process,�the�electronic�wheel�units�send�the�tire�pressure�andtemperature�as�well�as�their�identification�number�to�the�RDC�control�unit�at�regular�intervals�whiledriving.
If�a�change�in�the�pressure�>�20�kPa�(0.2�bars,�2.9�psi)�is�detected�between�two�subsequent�pressuremeasurements,�the�electronic�wheel�unit�on�the�affected�wheel�immediately�changes�over�to�the�rapidtransmission�mode.�It�then�sends�the�information�to�the�control�unit�at�intervals�of�one�second.�Apressure�loss�greater�than�25%�results�in�an�RDC�text�message�indicating�"Tire�pressure�loss".
F11�RDC�display�Pressure�Loss
F11�General�vehicle�electrical�system6.�Tire�pressure�control�RDC.
24
6.2.�System�Circuit�Diagram
F11�RDC�System�circuit�diagram
F11�General�vehicle�electrical�system6.�Tire�pressure�control�RDC.
25
Index Explanation1 Left�front�electronic�wheel�unit2 Right�front�electronic�wheel�unit3 Luggage�compartment�electrical�distribution�box4 Right�rear�electronic�wheel�unit5 Tire�pressure�control�RDC6 Left�rear�electronic�wheel�unit7 Central�Gateway�Module8 Instrument�cluster�KOMBI9 Central�Information�Display10 Headunit11 Controller
6.3.�Notes�for�service
6.3.1.�Removing/installing�electronic�wheel�units
When�removing/installing�the�electronic�wheel�units�for�the�tire�pressure�control�system�it�is�necessaryto�observe�the�following�points:
• Do�not�clean�rims�with�electronic�wheel�units�using�high�pressure�cleaner�when�tire�is�notmounted.
• Replace�electronic�wheel�units,�if�tire�sealing�fluid�has�been�used.• Clean�valve�and�valve�seat�thoroughly�before�installing�electronic�wheel�unit.• Do�not�use�solvents�or�cleaning�agents�on�electronic�wheel�units,�do�not�clean�with
compressed�air.• When�cleaning�electronic�wheel�units�wipe�off�with�clean�rag�only.
F11�General�vehicle�electrical�system7.�Integrated�automatic�heating/airconditioning
26
7.1.�Evaporator�coatingOn�vehicles�up�to�production�date�08/2010�an�ionizer�was�used�to�prevent�evaporator�odors.�Onvehicles�as�of�production�date�09/2010�this�has�been�replaced�by�a�special�evaporator�coating�with�acomparable�effect.�The�ionizer�has�therefore�been�eliminated.�The�evaporator�coating�is�used�on�allmajor�series�vehicles�(F01,�F02,�F04,�F07,�F10,�F11�and�F18)�as�of�production�date�09/2010.
Bayerische�Motorenwerke�AktiengesellschaftHändlerqualifizierung�und�TrainingRöntgenstraße�785716�Unterschleißheim,�Germany
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