BMW F48 Installation guide
Technical�training.
Product�information.
BMW�Service
F48�General�Vehicle�Electronics
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�a�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
F48�General�Vehicle�Electronics
Contents
1. Vehicle�Electrical�System............................................................................................................................................................................................. 1
1.1. Data�bus�overview................................................................................................................................................................................................ 1
1.2. Main�bus�systems.................................................................................................................................................................................................3
1.2.1. K-CAN.................................................................................................................................................................................................... 3
1.2.2. PT-CAN................................................................................................................................................................................................ 8
1.2.3. FlexRay..................................................................................................................................................................................................9
1.2.4. D-CAN................................................................................................................................................................................................13
1.2.5. Ethernet...........................................................................................................................................................................................13
1.2.6. MOST..................................................................................................................................................................................................13
1.3. Sub-bus�systems...............................................................................................................................................................................................13
1.3.1. Local�interconnect�network�bus...............................................................................................................13
1.3.2. Local-CAN...................................................................................................................................................................................14
1.3.3. USB........................................................................................................................................................................................................ 14
1.3.4. APIX....................................................................................................................................................................................................... 14
1.4. Control�units.............................................................................................................................................................................................................. 15
1.4.1. Complete�overview........................................................................................................................................................15
1.4.2. Body�Domain�Controller....................................................................................................................................... 17
1.4.3. Frontal�Light�Electronics...................................................................................................................................... 17
1.4.4. TRSVC�control�unit.......................................................................................................................................................18
1.4.5. Park�Distance�Control/Parking�Maneuver�Assistant................................................. 19
1.4.6. Crash�Safety�Module................................................................................................................................................. 20
1.4.7. Dynamic�Stability�Control...................................................................................................................................20
1.4.8. Optional�equipment�system............................................................................................................................21
1.4.9. Camera-based�driver�support�systems.........................................................................................22
1.4.10. Automatic�operation�of�tailgate................................................................................................................. 23
1.4.11. Longitudinal�torque�distribution............................................................................................................... 23
2. Voltage�Supply............................................................................................................................................................................................................................. 24
2.1. Overview.......................................................................................................................................................................................................................... 24
2.2. Components.............................................................................................................................................................................................................. 26
2.2.1. Battery............................................................................................................................................................................................... 27
2.2.2. Intelligent�battery�sensor.....................................................................................................................................27
2.2.3. Power�distribution�boxes......................................................................................................................................28
3. Exterior�Lights............................................................................................................................................................................................................................... 30
3.1. Headlights......................................................................................................................................................................................................................30
3.1.1. Halogen�headlight........................................................................................................................................................... 30
3.1.2. LED�headlight�with�extended�scope..................................................................................................31
3.1.3. fog�lights........................................................................................................................................................................................ 34
3.2. Rear�lights..................................................................................................................................................................................................................... 35
3.2.1. In�vehicles�with�halogen�headlights....................................................................................................35
F48�General�Vehicle�Electronics
Contents
3.2.2. Vehicles�with�LED�headlights.......................................................................................................................36
4. Interior�Lighting.......................................................................................................................................................................................................................... 37
4.1. System�wiring�diagram............................................................................................................................................................................. 38
5. Heating/Air�Conditioning�Systems..........................................................................................................................................................41
5.1. Components�and�systems..................................................................................................................................................................41
5.1.1. Integrated�automatic�heating�and�air�conditioning......................................................41
5.1.2. Heating�and�air-conditioning�unit...........................................................................................................46
5.1.3. Microfilter...................................................................................................................................................................................... 48
5.1.4. Air/Water�separation�(Venturi�adapter)........................................................................................... 49
5.1.5. ECO�PRO�mode�of�heating�and�air�conditioning�program...............................51
6. Locking�and�Security�Functions..................................................................................................................................................................52
6.1. Overview�of�functions.................................................................................................................................................................................54
6.1.1. Remote�control�receiver........................................................................................................................................ 55
6.2. Central�locking�system............................................................................................................................................................................. 55
6.2.1. Special�functions.............................................................................................................................................................. 56
6.2.2. System�wiring�diagram............................................................................................................................................57
6.3. Comfort�Access................................................................................................................................................................................................... 59
6.3.1. System�wiring�diagram............................................................................................................................................60
6.3.2. System�components...................................................................................................................................................62
6.4. Hands�free�tailgate�opening............................................................................................................................................................. 63
6.4.1. System�wiring�diagram............................................................................................................................................64
6.4.2. Functional�description�of�tailgate�opening.............................................................................. 65
7. Alarm�System..................................................................................................................................................................................................................................69
7.1. System�wiring�diagram............................................................................................................................................................................. 69
8. Wash/Wipe�System...............................................................................................................................................................................................................71
8.1. Introduction................................................................................................................................................................................................................. 71
8.2. Operation........................................................................................................................................................................................................................ 71
8.3. System�wiring�diagram............................................................................................................................................................................. 72
9. Steering�Wheel�Heating...............................................................................................................................................................................................74
9.1. System�wiring�diagram............................................................................................................................................................................. 74
F48�General�Vehicle�Electronics
1.�Vehicle�Electrical�System
1
1.1.�Data�bus�overview
F48�data�bus�overview
F48�General�Vehicle�Electronics
1.�Vehicle�Electrical�System
2
Index Explanation
1 Start-up�node�control�units�for�starting�and
synchronizing�the�FlexRay�bus�system
2 Control�units�with�wake-up�authorisation
ACSM Advanced�Crash�Safety�Module
AMP Audio�amplifier
BDC Body�Domain�Controller
CID Central�information�display
CON Controller
DME Digital�Motor�Electronics
DSC Dynamic�Stability�Control
EGS Electronic�transmission�control
EPS Electronic�Power�Steering
FLEL Frontal�Light�Electronics�Left
FLER Frontal�Light�Electronics�Right
FZD Roof�function�center
HEADUNIT Headunit
HKL Automatic�operation�of�tailgate
HUD Head‐Up�Display
IHKA Integrated�heating�and�air�conditioning
KAFAS Camera-based�driver�support�systems
KOMBI Instrument�cluster
LMV Longitudinal�torque�distribution
PDC Park�Distance�Control
PMA Parking�Manoeuvring�Assistant
SAS Optional�equipment�system
SMFA Driver's�seat�module
TBX Touchbox
TCB Telematic�Communication�Box
TRSVC Control�unit�for�rear�view�camera�and�Side�View
ZGM Central�gateway�module
F48�General�Vehicle�Electronics
1.�Vehicle�Electrical�System
3
1.2.�Main�bus�systems
1.2.1.�K-CAN
In�the�F48�the�following�K-CANs�are�used:
• K-CAN2
• K-CAN3
• K-CAN4
All�K-CAN�data�buses�have�a�data�transfer�rate�of�500kBit/s.
The�K-CAN�with�100�kBit/s�is�no�longer�used�in�the�F48.
F48�General�Vehicle�Electronics
1.�Vehicle�Electrical�System
4
K-Can�termination
F48�K-Can�termination
F48�General�Vehicle�Electronics
1.�Vehicle�Electrical�System
5
Index Explanation
1 Body�Domain�Controller�(BDC)
2 Integrated�heating�and�air�conditioning
3 Headunit
4 Controller�(CON)
5 K-CAN�terminator
6 Touchbox�(TBX)
7 Audio�amplifier�(AMP)
8 Telematic�Communication�Box�(TCB)
The�CAN�buses�are�shown�in�the�overview�of�the�bus�systems.�The�actual�physical�layout�(topology)�is
shown�using�the�example�of�the�K-CAN2.
As�with�most�bus�systems,�terminating�resistors�are�also�used�for�protection�of�the�K-CAN�to�avoid
residual�voltages�on�the�data�lines.
The�terminating�resistors�for�the�termination�are�located�in�the:
• Body�Domain�Controller�and
• K-CAN�terminators.
All�other�control�units�are�connected�at�the�K-CAN�terminator�without�a�terminating�resistor.
F48�General�Vehicle�Electronics
1.�Vehicle�Electrical�System
6
CAN�terminator
CAN�terminator
Depending�on�the�equipment�package,�in�the�CAN�terminator�the�terminating�resistor�for�the
corresponding�CAN�bus�is�installed.�The�terminating�resistor�comprises�two�resistances�connected
in�series,�each�60�Ohm.�A�measuring�tap�against�ground�with�a�capacitor�for�the�reduction�of�high-
frequency�faults�is�also�installed.�Ferrite�beads�are�installed�for�all�bus�lines�in�the�CAN�terminator.
Ferrite�beads�suppress�high-frequency�faults�on�the�CAN�data�lines,�thus�making�possible�line�lengths
of�up�to�5m�in�the�wiring�harness.
Ferrite�core
A�ferrite�core�is�a�component�made�from�the�ferromagnetic�material�iron�oxide�hematite�(Fe203).�It�is
characterized�by�low�or�no�conductivity.�The�inductance�or�the�magnetic�field�is�increased�as�part�of�a
coil�(throttle�or�transformer).�If�a�ferrite�core�is�secured�around�a�conductor,�which�routes�signals�at�low
frequency�or�direct�current�voltage,�high-frequency�faults�are�attenuated�with�its�help.
Ferrite�core
Index Explanation
1 Ferrite�core�using�the�example�of�a�USB�line
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