Audi R8 2008 Service Training Manual page 60

Air Conditioning
System Communication
Various sensors provide input to Climatronic Control
Module J255. Outside Air Temperature Sensor G7 is
located in front of the condenser on the right side of the
vehicle. The sensor signal is evaluated by Instrument
Cluster Control Module J285. The signal is then sent
to other control modules, as well as Climatronic
Control Module J255 via the comfort CAN system. The
temperature value of the sensor is recalculated in
Climatronic Control Module J255 since the actual value
is not always measured due to the location of Outside
Air Temperature Sensor G7. Dash panel temperature
sensor G56 is received by Climatronic Control Module
J255, and the sensor is part of the module.
56
J533
Combi CAN
J285
Comfort CAN
G17
Data is transferred between Fresh Air Blower Control
Module J26 and Climatronic Control Module J255 using
the LIN data bus system of the air conditioning system.
A/C Pressure/Temperature Sensor G395 also transfers
data to Climatronic Control Module J255 using the
LIN data bus. The following sensors use discrete wire
communication to Climatronic Control Module J255:
Fresh Air Intake Duct Temperature Sensor G89 (located
in the air intake unit), Sunlight Photo Sensor G07 (used
to take into account when actuators are operated), and
Seat Temperature Sensors G344 (left) and G345 (right).
G89 G107
J255
LIN Bus
G344
G345
J126
G395