BMW i3 Technical Training Manual page 101

I01￿General￿Vehicle￿Electronics
12.￿Seat￿Heating
Index
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Signal￿path￿for￿seat￿heating:
• The￿buttons￿for￿the￿seat￿heating￿are￿read￿in￿by￿the￿control￿panel￿of￿the￿heating￿and￿air-
conditioning￿system.
• The￿control￿unit￿for￿the￿IHKA￿or￿integrated￿heating￿/￿air-conditioning￿regulation￿sends￿the￿local
interconnect￿network￿bus￿information￿on￿the￿K-CAN4
• The￿BDC￿receives￿this￿information￿and￿transmits￿the￿corresponding￿switch-on￿stage￿to￿the
respective￿seat￿module￿via￿local￿interconnect￿network￿bus.
• The￿seat￿module￿activates￿the￿heating￿mats￿with￿the￿corresponding￿power.
The￿control￿of￿the￿heater￿output￿is￿dependent￿on:
• the￿switch-on￿stage￿of￿the￿seat￿heating￿and
• the￿switch￿position￿of￿the￿driving￿experience￿switch.
Explanation
Body￿Domain￿Controller
Fuses￿in￿the￿power￿distribution￿box￿in￿the￿passenger￿compartment
Seat￿heating￿pad￿on￿passenger's￿side,￿seat￿surface
Seat￿heating￿pad￿on￿passenger's￿side,￿backrest
Front￿passenger￿seat￿module
Driver's￿seat￿module
Seat￿heating￿pad￿on￿driver's￿side,￿seat￿surface
Seat￿heating￿pad￿on￿driver's￿side,￿backrest
Heating￿-￿A/C￿control￿panel
Integrated￿automatic￿heating￿/￿air-conditioning￿system
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