BMW G15 - Residing

G15�General�Vehicle�Electronics
5.�Terminal�Control
47
Index Explanation
5 When�the�start/stop�button�is�pressed,�the�terminal�status�changes�from
driving�to�residing�(combustion�engine�is�switched�off).
6 Change�from�residing�to�driving�(activate�the�head�unit�media�button�for�more
than�3s,�confirm�change�via�controller,�change�by�leaving�the�vehicle)
7 When�the�start/stop�button�is�pressed,�the�terminal�status�changes�from
parking�to�residing.
8a When�the�start/stop�button�is�pressed�(3�times�in�0.8�s),�the�terminal�status
changes�from�residing�to�testing-analysis-diagnosis�(PAD).
8b When�the�start/stop�button�is�pressed�(3�times�in�0.8�s),�the�terminal�status
changes�from�parking�to�testing-analysis-diagnosis�(PAD).
9 When�the�start/stop�button�is�pressed,�the�terminal�status�changes�from
testing-analysis-diagnosis�(PAD)�to�residing.
10 Change�from�residing�to�driving�(locking�vehicle,�no�customer�interaction�for
10minutes.)
Further�information�on�terminal�control�can�be�found�in�the�Product�Information�G12�General�Vehicle
Electronics.
5.2.�Partial�network�operation
Present-day�vehicles�contain�up�to�70�control�units�with�well�over�100�microcontrollers�which�are
networked�with�each�other.�Depending�on�the�current�vehicle�condition,�not�all�comfort�and�assistance
systems�are�always�required.
Through�the�targeted�cutting�out�and�cutting�in�of�control�units�that�are�not�required,�it�is�possible�to
save�energy�and�thus�relieve�the�strain�on�the�battery.
5.2.1.�Control�units
Different�transceivers�are�used�in�the�control�units�in�order�to�realize�partial�network�operation.�These
transceivers�are�able�to�evaluate�and�interpret�messages.�This�control�unit�remains�switched�off�as
long�as�any�bus�communication�takes�place�without�a�valid�wake-up�event�for�the�control�unit�being
present.�If�a�wake-up�event�is�transmitted�on�the�corresponding�bus,�the�transceiver�can�activate�the
microcontroller's�voltage�regulator�and�the�control�unit�starts�up.
Certain�control�units�on�the�Ethernet�require�a�separate�wake-up�via�the�terminal�15�wake-up�line�for
starting�up.
5.2.2.�Residing
If�e.g.�the�radio�is�being�listened�to�in�the�vehicle�condition,�only�the�bus�system�to�which�the�radio
function�is�connected�is�active.�The�other�bus�systems�are�woken�up�only�when�a�further�function,
such�as�e.g.�seat�heating,�is�required.