BMW G12 2015 Technical Training Manual 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
• Rain‐light‐solar-condensation￿sensor
• Roof￿function￿center￿(interior￿lighting)
• Comfort￿seat,￿rear￿passenger￿compartment,￿left￿and￿right
• Steering￿column￿adjustment
• Wiper
• Operating￿unit,￿center￿console
• Power￿distribution￿box,￿rear
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