Audi Air conditioning 2003 A8 Workshop Manual page 73

Stage „1"
Stage „2"
Stage „3"
Stage „4"
Stage „5"
Stage „6"
7.2.2 Checking seat ventilation (interrogation
of information from seat ventilation con‐
trol units)
This applies to the following control units ( driver seat ventilation
control unit -J672- , front passenger seat ventilation control unit -
J673- , driver side rear seat ventilation control unit -J674- and
front passenger side rear seat ventilation control unit -J675- )
Note
Information on these control units is displayed in the measured
♦
value block of the front operating and display unit, Climatronic
control unit -J255- and the rear Climatronic operating and dis‐
play unit -E265- ⇒ "Guided fault-finding" function of vehicle
diagnostic, testing and information system VAS 5051.
The front seat ventilation and heating stage currently selected
♦
is indicated in the measured value blocks of the front operating
and display unit, Climatronic control unit -J255- ⇒ "Guided
fault-finding" function of vehicle diagnostic, testing and infor‐
mation system VAS 5051.
The rear seat ventilation and heating stage currently selected
♦
is indicated in the measured value blocks of the rear Clima‐
tronic operating and display unit -E265- ⇒ "Guided fault-
finding" function of vehicle diagnostic, testing and information
system VAS 5051.
♦ Actuation of the seat ventilation blower is not displayed direct‐
ly. Actuation of the corresponding blower or of the appropriate
seat ventilation control unit can be checked for example as
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– Switch off electrical equipment with a high current input (e.g.
heated rear window).
– Select the lowest possible speed setting for the fresh air blow‐
er -V2- .
– Set the ventilation control for the corresponding seat (in the
front or rear operating and display unit) to the maximum set‐
ting.
– Check the corresponding seat by listening for the blower run‐
ning noise in the seat.
– Set the heating control for the corresponding seat (in the front
or rear operating and display unit) to the maximum setting. The
relevant measured value block indicates activation of the seat
heating ⇒ "Guided fault-finding" function of vehicle diagnostic,
testing and information system VAS 5051.
♦ The following must be heeded at present with regard to seat
ventilation operation:
– Ventilation is not possible at seat temperatures below 15 °C
(deactivation on account of inadequate seat temperature).
19 °C
25 °C
31 °C
38 °C
48 °C
60 °C
7. Electrical checking of components actuated by the air conditioner
Audi A8 2003 ➤
Air conditioning - Edition 09.2010
29 °C
32 °C
36 °C
40 °C
43 °C
46 °C
67