Self-Study Program

36
The entry and start authorisation switch E415 is not
mechanically encoded. This switch can, therefore,
be turned with any A6 key. Key recognition is
electronic only.
Control units
Tasks of the entry and start authorisation switch E415
364_027
● Evaluating the key position in the ignition switch
with 4 microswitches
● Transferring the current ignition key position via
single-wire bus and via 2 discrete lines to the
entry and start authorisation control unit
● For safety reasons, the entry and start
authorisation switch has an additional
disconnect for the power supply to the steering
column lock (to prevent automatic locking)
● Reading the gear selector position P switch F305
(only in vehicles with automatic gearbox)
● Controlling the integrated ignition key
withdrawal lock
● Reading the entry and start authorisation button
E408 (only in vehicles with Advanced Key)
● Reading the signal from the central locking and
anti-theft alarm system aerial R47
● Relaying data received from the remote control
key to the entry and start authorisation control
unit
● Reading the signal from brake light switch F
(only in vehicles with Advanced Key)
● Transmitting power via a reader coil to the
inserted ignition key so that it can send its key ID
● Transmitting the received key ID via the single-
wire bus to the entry and start authorisation
control unit J518
● Communicating with the other components of
the entry and start authorisation system via
a local single-wire bus