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Convenience system central control unit
Immobiliser V
For the first time, immobiliser V system is used on
the new Audi A5. It is an improved version of the
immobiliser IV system and there are no significant
differences between the two system with respect to
servicing. The various tasks performed on the
immobiliser using the diagnostic tester, such as the
adaption of replaced immobiliser components, have
been greatly simplified.
Many procedures on the immobiliser V system are
more heavily automated, and some procedures have
been eliminated completely for the sake of simplic-
ity.
System overview
393_047
Convenience
control unit
J393
Immobiliser V master
Data bus
diagnostic
interface
J533
FAZIT
database
Powertrain CAN bus
Convenience
CAN bus
Diagnostics
Network connection
Automatic gear-
box
J217
Engine
control unit
J623
Electronic
ignition lock
module
E415
Electrical
steering column
locking control
unit J764
LIN bus
The master for the immobiliser is the convenience
system control unit J393, into which the functions of
the entry and start authorisation control unit J518
have been integrated. Components which thick bor-
ders are all immobiliser system users. Components
with thin borders, such as a data bus diagnostic
interface and the electronic ignition lock, only trans-
fer immobiliser information.
As with the immobiliser IV system, an online con-
nection to the FAZIT database must be established
before any work can be performed on the immobi-
liser. The online connection is made via the diagnos-
tic tester.
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