BMW F12 2011 Installation guide

Technical�training.

Product�information.

BMW�Service

F12�Chassis�Dynamics

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�continu-

ous�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�el-

ements�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

Reprints�of�this�publication�or�its�parts�require�the�written�approval�of�BMW�AG,�München

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�infor-

mation�systems�of�the�BMW�Group�for�any�changes/additions�to�the�technical�data.

Status�of�the�information:�November�2010

VH-23/International�Technical�Training

F12�Chassis�Dynamics

Contents

1. Introduction.............................................................................................................................................................................................................................................1

1.1. Driving�dynamics�and�comfort..........................................................................................................................................................1

1.2. Bus�system�overview....................................................................................................................................................................................... 2

2. Models...............................................................................................................................................................................................................................................................5

2.1. Comparison..................................................................................................................................................................................................................... 5

3. Chassis�and�suspension................................................................................................................................................................................................. 6

3.1. Front�axle............................................................................................................................................................................................................................ 6

3.1.1. Technical�data............................................................................................................................................................................7

3.1.2. Service�Information........................................................................................................................................................... 7

3.2. Rear�axle...............................................................................................................................................................................................................................8

3.2.1. Technical�data........................................................................................................................................................................10

3.2.2. Service�Information.......................................................................................................................................................10

3.3. Suspension/dampers................................................................................................................................................................................... 11

3.3.1. Electronic�Damper�Control�(EDC)..........................................................................................................11

3.4. Wheels�&�Tires......................................................................................................................................................................................................12

3.5. Tire�Pressure�Monitor�System..................................................................................................................................................... 13

3.5.1. System�function................................................................................................................................................................. 13

3.5.2. System�overview............................................................................................................................................................... 15

3.5.3. System�wiring�diagram............................................................................................................................................16

3.5.4. Notes�for�Service............................................................................................................................................................. 17

4. Brakes............................................................................................................................................................................................................................................................19

4.1. Service�brakes........................................................................................................................................................................................................ 19

4.2. Electromechanical�Parking�Brake�(EMF)...................................................................................................................... 20

4.2.1. System�overview............................................................................................................................................................... 21

4.2.2. System�wiring�diagram............................................................................................................................................23

4.2.3. System�structure.............................................................................................................................................................. 24

4.2.4. System�function................................................................................................................................................................. 24

5. Steering......................................................................................................................................................................................................................................................33

5.1. Basic�steering..........................................................................................................................................................................................................34

5.1.1. System�overview............................................................................................................................................................... 34

5.1.2. System�wiring�diagram............................................................................................................................................36

5.2. Integral�Active�Steering........................................................................................................................................................................... 37

5.2.1. Functional�ranges............................................................................................................................................................ 38

5.2.2. System�wiring�diagram............................................................................................................................................41

5.2.3. EPS�with�24�V.......................................................................................................................................................................43

5.2.4. Rear�axle�slip�angle�control�HSR............................................................................................................. 50

F12�Chassis�Dynamics

Contents

6. Driving�stability�control................................................................................................................................................................................................53

6.1. Directions�of�action........................................................................................................................................................................................ 53

6.2. Dynamic�Stability�Control�DSC...................................................................................................................................................53

6.3. Electronic�Damper�Control�(EDC)........................................................................................................................................... 54

6.4. Active�Roll�Stabilization�ARS�(Dynamic�Drive).................................................................................................... 55

6.5. Drive�dynamic�control�switch......................................................................................................................................................... 60

6.5.1. Handling�dynamics�programs.......................................................................................................................62

F12�Chassis�Dynamics

1.�Introduction

1.1.�Driving�dynamics�and�comfort

F12�Chassis�and�suspension

Index Explanation

1 Suspension/dampers

2 Electromechanical�Power�Steering�(EPS)

3 Integral�V�rear�axle

4 Electromechanical�Parking�Brake�(EMF)

5 Wheels

6 Dynamic�Stability�Control�(DSC)

7 Brakes

8 Double-wishbone�front�axle

The�chassis�and�suspension�of�the�F12�is�based�on�the�F10.�It�has�been�adapted�to�the�specific�re-

quirements�of�the�F12�in�order�to�achieve�outstanding�driving�dynamics�while�maintaining�extremely

high�standards�of�comfort.

A�double-wishbone�front�axle�is�used�instead�of�the�double�pivot�spring-strut�axle�of�the�E64.�The�inte-

gral�V�rear�axle�replaces�the�integral�IV�rear�axle�that�featured�in�the�E64.

F12�Chassis�Dynamics

1.�Introduction

The�F12�features�innovations�already�familiar�from�other�BMW�models,�such�as�Integral�Active�Steer-

ing,�Integrated�Chassis�Management�(ICM),�Dynamic�Drive�and�Electronic�Damper�Control�(EDC).

1.2.�Bus�system�overview

F12�Bus�System�overview

F12�Chassis�Dynamics

1.�Introduction

Index Explanation

1 Control�units�with�wake-up�authorization

2 Start-up�node�control�units�for�starting�up�and�synchronizing�the�FlexRay�bus

system

ACC-SEN Active�Cruise�Control�Sensor

ACSM Advanced�Crash�Safety�Module

AL Active�steering

AMPT Top�HiFi�amplifier

BCU Battery�Charge�Unit�(for�auxiliary�battery�only�w/IAC)

CAS Car�Access�System

CID Central�information�display

COMBOX Combox�(Combox�multimedia,�Combox�multimedia�with�telematics)

CON Controller

CVM Convertible�top�module

DME Digital�Motor�Electronics

DSC Dynamic�Stability�Control

DVDC DVD�changer

EDCSHL Electronic�Damper�Control�satellite,�rear�left

EDCSHR Electronic�Damper�Control�satellite,�rear�right

EDCSVL Electronic�Damper�Control�satellite,�front�left

EDCSVR Electronic�Damper�Control�satellite,�front�right

EGS Electronic�transmission�control

EKPS Electronic�fuel�pump�control

EMF Electromechanical�parking�brake

EPS Electronic�power�steering�(electromechanical�power�steering)

FRM Footwell�module

GWS Gear�selector�switch

HEADUNIT Headunit�(car�information�computer�or�car�information�computer�basic�II)

HSR Rear�axle�slip�angle�control

HUD Head‐Up�Display

ICM Integrated�Chassis�Management

IHKA Automatic�integrated�heating�and�A/C�control�unit

JBE Junction�box�electronics

KAFAS Camera-based�driver�support�systems

KOMBI Instrument�panel

NVE Night�vision�electronics

F12�Chassis�Dynamics

1.�Introduction

Index Explanation

PDC Park�Distance�Control

PMA Parking�maneuvering�assistant

TPMS Tire�Pressure�Monitor�System

SINE Siren�with�tilt�alarm�sensor

SMBF Front�passenger�seat�module

SMFA Driver's�seat�module

SWW Blind�Spot�Detection�(Lane�change�warning)

SZL Steering�column�switch�cluster

TRSVC Control�unit�for�camera�systems

VDM Vertical�Dynamics�Management

VSW Video�switch

ZGM Central�gateway�module

F12�Chassis�Dynamics

2.�Models

2.1.�Comparison

The�following�technical�data�allows�a�comparison�to�be�made�between�the�chassis�and�suspension�of

the�F12�and�its�predecessor�the�E64.

Designation E64�BMW�650i F12�BMW�650i

Wheelbase 2780�mm 2855�mm

Front�track�width 1558�mm 1600�mm

Rear�track�width 1596�mm 1657�mm

Tires,�basic�wheels 245/45�R18�96W 245/45�R18�96Y

Basic�wheel�rims 8J�x�18�IS�14 8J�x�18�IS�30

Front�axle Double�pivot�spring-

strut�front�axle

Double-wishbone�front�axle

Springs/dampers Steel�spring/con-

ventional�or�EDC

Steel�spring/con-

ventional�or�EDC

Anti-roll�bar,�front mechanical�or�hy-

draulic�(Dynamic�Drive)

mechanical�or�hy-

draulic�(Dynamic�Drive)

Front�brake�disc�dia. 348mm 374mm

Steering Hydraulic�or�active�steering Electronic�Pow-

er�Steering�EPS

Rear�axle Integral�IV�rear�axle Integral�V�rear�axle

Rear�suspension/dampers Steel�spring,�con-

ventional�or�EDC

Steel�spring/con-

ventional�or�EDC

Rear�anti-roll�bar mechanical�or�hy-

draulic�(Dynamic�Drive)

mechanical�or�hy-

draulic�(Dynamic�Drive)

Rear�brakes�disc�dia. 345mm 370mm

Parking�brake Drum�brake�with�park-

ing�brake�lever�and�au-

tomatic�cable�setting

Disc�brake�with�electrome-

chanical�parking�brake

F12�Chassis�Dynamics

3.�Chassis�and�suspension

3.1.�Front�axle

F12�Double-wishbone�front�axle

Index Explanation

1 Spring�strut

2 Upper�wishbone

3 Swivel�bearing

4 Anti-roll�bar�link

5 Lower�wishbone

6 Wheel�hub

7 Track�rod

8 Trailing�link

9 Front�axle�support

10 Anti-roll�bar�with�hydraulic�actuator�(Dynamic�Drive)

11 Steering�box

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