Audi A4 2001 - CAN BUS Network Architecture

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“,
page 42 , ⇒ Heating, Ventilation and Air Conditioning; Rep.
Gr. 87 ; Removal and Installation (vehicle-specific repair man‐
ual).
Note
♦ The fluid reservoir can be flushed depending on the version
(remove dryer cartridge if necessary). Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“,
page 42 , ⇒ Heating, Ventilation and Air Conditioning; Rep.
Gr. 87 ; Removal and Installation (vehicle-specific repair man‐
ual).
♦ The fluid reservoir connected to the condenser (such as on
model Audi A3 from model year 2004) remains installed during
flushing (it can be flushed due to its design and is only replaced
after flushing). Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“, page 42
and ⇒ Heating, Ventilation and Air Conditioning; Rep. Gr. 87 ;
Removal and Installation (vehicle-specific repair manual).
♦ If the reservoir / dryer cartridge is integrated in the condenser,
then they cannot be replaced individually or are not available
as a single part, and the condenser must be replaced. Replace
the condenser with the reservoir on these vehicles. Refer to
⇒ Heating, Ventilation and Air Conditioning; Rep. Gr. 87 ;
Removal and Installation and Electronic Parts Catalog (ET‐
KA).
♦ Reservoirs, where it is possible to replace the dryer cartridge,
have an additional filter, which must also be replaced with the
dryer cartridge.
– Remove dryer cartridge from vehicles with dryer partridge in
fluid reservoir that is connected to the condenser (vehicle-
specific), and seal opening on fluid reservoir. Refer to ⇒
Heating, Ventilation and Air Conditioning; Rep. Gr. 87 ; Re‐
moval and Installation (vehicle-specific repair manual).
– Remove expansion valve (vehicle-specific) and install one
adapter from the Adapter case for VW/Audi passenger cars -
VAS 6338/1- . Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“,
page 42 , ⇒ Heating, Ventilation and Air Conditioning; Rep.
Gr. 87 ; Removal and Installation (vehicle-specific repair man‐
ual).
Note
If there is no adapter suitable for the expansion valve in the VW/
Audi passenger vehicle set adapter chest -VAS 6338/1- , the re‐
moved expansion valve can also be drilled open (the old expan‐
sion valve must be replaced in most cases and is therefore no
longer required).
Caution
♦ Make sure the sealing surfaces on the expansion valve
are not damaged when drilling open.
♦ Refrigerant will leak out if the sealing surface gets dam‐
aged.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
34 Rep. Gr.00 - General, Technical Data