Horn - BMW G12 2015 Technical Training Manual

G12￿General￿Vehicle￿Electronics
14.￿Horn
14.1.￿System￿wiring￿diagram
Horns
Index
1
2
3
4
Signal￿path￿of￿horn:
• The￿horn￿button￿is￿read￿in￿by￿the￿steering￿column￿switch￿cluster￿(SZL).
• The￿SZL￿sends￿the￿information￿via￿the￿local￿interconnect￿network￿bus
to￿the￿Body￿Domain￿Controller.
• The￿Body￿Domain￿Controller￿evaluates￿the￿information￿and￿activates
the￿relay￿for￿the￿horn.
Explanation
Horn,￿left
Horn,￿right
Relay￿in￿the￿Body￿Domain￿Controller
Body￿Domain￿Controller￿(BDC)
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