Can Networking - Audi A6´05 323 Service

Separate temperature distibution
Sun position sensor
Air quality sensor
Residual heat
Pollen filter / combination filter
Circulating air filter
Indirect ventilation
Rear compart. ventilation (middle)
Rear compartment ventilation (B-pillar)
Central air vent with adjustable temperature
Control concept

CAN networking

The air conditioning system in the new Audi A6´05 is
integrated within the convenience CAN (see table).
In addition to the air conditioning master control,
Climatronic control unit J255 is the master control
unit for the distributed functions rear window
heating, the optional seat heating and the optional,
factory-fitted auxiliary heater.
Most of the necessary data messages are
transmitted to Climatronic control unit J255 by
means of the CAN bus. The unit also transmits
messages via this data bus, which are used for the
distributed functions at the other control units.
This data bus is also used for the analysis of the air
conditioning system in the event of malfunctions, in
conjunction with Diagnosis interface for data
bus J533, CAN-Diagnosis and the corresponding
Diagnosis tester.
Convenience automatic Convenience automatic
air conditioning air conditioning Plus
X X
X X
- X
- X
X/- -/X
X X
- X
X X
- X
- X
water-based water-based
The personalization of the air conditioning settings
is effected by importing the respective code
identification message from the control unit for
access and start authorization J518. Fresh air
blower control unit V2 is connected to Climatronic
control unit J255 via a LIN bus. The control unit for
solar operation (J355) of the optional solar sliding
roof is connected directly to Fresh air blower
control unit V2. Communication with Climatronic
control unit J255 is effected via Fresh air blower
control unit V2, which sends a LIN message to
Climatronic control unit J255 when it receives
voltage signals from the control unit for solar
operation (J355). This message is then forwarded to
the control unit for convenience electronics (J393),
which needs this information for the interior
monitoring function.
A6
Predecessor
X
X
X
-
-/X
-
-
X
-
-
air-based
61