service AUDI A4 1999 B5 / 1.G AC System On Board Diagnostic Workshop Manual
Page 10 of 91
01-7
A/C system changes
Revised heating/air conditioner assembly with
flap motors page 87
-174
.
The air flow flap motor now activates the fresh
air/recirculating air flap as well.
The two way valve for the circulating/fresh air
door, the vacuum unit and the vacuum reservoir
are deleted.
A/C refrigerant circuit changes
New service valve connection on low pressure
side.
Service valve connection for high pressure side
installed in high pressure line in plenum panel
(deleted at condenser).
A/C pressure switch -F129- replaces pressure
switches -F73- and -F118-.
New version "Zexel" compressor and high
pressure line (4-cyl. engines only).
Pa
ge 10 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1
Page 19 of 91
Parts catalog microfiche
Depending on VAG1551 Scan Tool (ST) program card version, 1st and 2nd digit may not
be displayed (readout: e.g. 040 instead of
00040).
Software version of control head is of no
significance for service department.
If a replacement control head is not coded after
installation or if an unrecognized code was
entered, code "00042" (4-cyl. gasoline engine
USA) is stored.
Pa
ge 19 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1