Self-Study Program

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Entry and start authorisation control unit J518
● with aerial reader unit for entry authorisation for keyless entry system J723
● Entry and start authorisation switch E415 and
● Entry and start authorisation button E408
Changes to the Audi A6 ‘05
The entry and start authorisation system has basically been adopted from the Audi A6 ‘05. The following
changes have been made compared to the Audi A6 ’05:
The installation location of the aerial reader unit for entry authorisation for keyless entry system J723 was
changed.
In the Audi Q7 it is located at the rear right. The exact installation location is shown in the relevant section.
System overview
Three components of the entry and start
authorisation system communicate with each other
via a local single-wire bus.
These are:
– the entry and start authorisation control unit
J518
– the entry and start authorisation switch E415 and
– the aerial reader unit for entry authorisation for
keyless entry system J723 (is only installed in
combination with Advanced Key)
The entry and start authorisation control unit J518 is
the system master and represents the interface
externally. The entry and start authorisation control
unit J518 is a convenience CAN bus user.
364_025
Entry and start
authorisation
control unit
J518
The aerial reader
unit for entry
authorisation for
keyless entry
system
J723
Entry and start
authorisation
switch
E415