Removing and installing operating unit (Climatronic control unit J255) - automatically controlled air conditioner — AUDI

Removing and installing operating unit (
Climatronic control unit
J255
) - automatically controlled air conditioner
Special tools and workshop equipment required
Removal wedge
3409
Note
There are different versions of the operating unit (
Climatronic control unit
J255
) with different part numbers. Components with part number
“8X0 820 043”
are installed e.g. in vehicles with type codes
“8XA”
and
“8X1”
in the vehicle identification number. Components with part number
“8XA 820 043”
are installed e.g. in vehicles with type codes
“8XF”
and
“8XK”
in the vehicle identification number
Electronic parts catalogue
.
Removing
If the operating unit (
Climatronic control unit
J255
) is renewed, select
“Control unit replacement”
Vehicle diagnostic tester
in
“Guided Fault Finding”
or
“Guided Functions”
mode.
Observe general notes
Chapter
.
Remove mounting for switch unit (bottom)
Electrical system
Rep. gr.
96
Controls; Removing and installing switches in dash panel
.
Remove bolt
1
.
Using
removal wedge
3409
, release operating unit
2
at top
arrow
and pull it out of guides.
Unplug electrical connector
4
by sliding locking element
2
upwards and pressing catch
1
inwards.
Unplug electrical connector
3
.
Note
If the measured value for the dash panel temperature sensor
G56
is incorrect, check the intake grille of the operating unit (
Climatronic control unit
J255
) (must not be closed off) and check the operation of the temperature sensor blower
V42
.
Installing
Note
From model year 2012 onwards,
Z35
is also installed on vehicles with certain petrol engines (gradual introduction). The correct version of the operating unit (
Climatronic control unit
J255
, part number 8X0 820 043 from index
“B”
onwards) and the correct version of the engine control unit must be installed so that the operating unit
J255
and the corresponding engine control unit can activate
Z35
Vehicle diagnostic tester
and
Electronic parts catalogue
.
Install in reverse order of removal; note the following:
It is important to observe the correct version and assignment
Electronic parts catalogue
.
When renewing the operating unit (
Climatronic control unit
J255
), take care to select the correct version
Electronic parts catalogue
.
Tighten bolt
1
to 1.5 Nm.
After renewing/installing the operating unit (
Climatronic control unit
J255
), always perform the following steps
Vehicle diagnostic tester
in
“Guided Fault Finding”
mode.
Perform/check coding.
Perform basic setting.
Interrogate event memory (and eliminate cause of any entries displayed).
Check adaption.
Perform final control diagnosis if applicable.