Signal Path Of Horn - BMW i3 Technical Training Manual

I01￿General￿Vehicle￿Electronics
13.￿Horn
Index
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The￿relay￿for￿the￿horn￿is￿located￿above￿the￿power￿distribution￿box￿in￿the￿passenger￿compartment.￿The
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fuse￿for￿the￿horn￿is￿located￿in￿the￿Body￿Domain￿Controller.
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
Fanfare
Relay￿and￿fuse
1
Body￿Domain￿Controller
Steering￿column￿switch￿cluster
Horn￿button
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