BMW F48 Technical Training Manual page 32

F48￿General￿Vehicle￿Electronics
2.￿Voltage￿Supply
The￿IBS￿has￿the￿same￿range￿of￿functions￿as￿with￿the￿predecessor￿models.￿The￿data￿transfer￿via￿the
local￿interconnect￿network￿bus￿between￿the￿IBS,￿DEM￿and￿BDC￿is￿new.￿The￿IBS￿has￿a￿wake-up
function.
The￿IBS￿continuously￿records￿relevant￿values￿for￿the￿battery￿indicators￿when￿the￿vehicle￿is￿in￿rest
state.￿These￿can￿be￿read￿out￿for￿the￿diagnosis￿in￿the￿DME/DDE.
The￿IBS￿is￿fully￿functional￿directly￿after￿installation￿at￿the￿battery￿terminal￿(screw￿connection￿at
negative￿battery￿terminal￿and￿connection￿of￿signal￿lines),￿i.e.￿the￿basic￿variables￿voltage,￿current￿and
temperature￿can￿be￿called￿up￿straight￿away.￿However,￿the￿variables￿deduced￿for￿power￿management
(battery￿condition,￿starting￿capability,￿etc.)￿must￿be￿recalculated￿and￿are￿therefore￿available￿with￿a
delay.
2.2.3.￿Power￿distribution￿boxes
Power￿distribution￿box,￿passenger￿compartment
The￿power￿distribution￿box￿in￿the￿passenger￿compartment￿is￿located￿behind￿the￿glove￿box.
Some￿functions￿for￿which￿load￿relays￿are￿integrated￿in￿the￿BDC￿are￿protected￿directly￿in￿the￿BDC.
F48￿Power￿distribution￿box,￿passenger￿compartment
Index
1
2
3
28
Explanation
Relay,￿terminal￿15N
Relay,￿terminal￿30B
Relay,￿terminal￿30B