Ethernet - BMW G12 2015 Technical Training Manual

G12￿Voltage￿Supply￿and￿Bus￿Systems
1.￿Bus￿Systems
Index
1
2
3
4
5
6
7
8
9
10
11
12
13
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.
6
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)