BMW F48 - Power Distribution Boxes

F48�General�Vehicle�Electronics
2.�Voltage�Supply
28
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 Explanation
1 Relay,�terminal�15N
2 Relay,�terminal�30B
3 Relay,�terminal�30B