Self-Study Program

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Changes to Audi A6 ‘05
The convenience system central control unit J393 is
based on the control unit in the Audi A6 ‘05.
The following modifications have resulted:
Due to the introduction of a second convenience
system control unit (convenience system central
control unit 2 J773), several functions and outputs
have been omitted from the convenience system
central control unit J393. These are listed in the
following.
The pins which become available on the control unit
are now used for activating the additional lamps
because turn signals, brake and tail lights are
installed both in the tailgate and in the bumper.
This redundancy was necessary because the lights
in the tailgate are not sufficiently visible to traffic
following on behind when the tailgate is open.
Control units
Convenience system central control unit J393
Master functions
– Turn signal master
– Central locking master
– Interior lighting master
– LIN master for the LIN bus users alarm horn H12 and interior monitoring sensor G273
Variants
The convenience system central control unit J393 comes in 2 variants for the Audi Q7:
a basic variant and a Highline variant.
The Highline variant differs from the basic variant in that it has two additional functions:
– Activation of the rear footwell lights
– Tailgate power latching control
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