A4 Quattro Sedan L4-2.0L Turbo (CAEB) (2009)
Control Module HVAC: Description and Operation
Climatronic Control Module
Climatronic Control Module
‹› Beginning October 2007, the Comfort A/C system with an air distribution housing with optimized air distribution will be introduced
(distinguishing characteristic between versions "1" and "2" Refer to=> [ A/C Unit and Air Intake Housing Components, Comfort ] See:
Description and Operation/A/C System Components Inside Passenger Compartment.
-
On vehicles with a version "2" A/C system, the A/C Control Head Climatronic Control Module for the "Comfort" A/C system with part number
"8T1 820 043" beginning with the index letter "Q" or with part number "8T2 820 043".
-
If on vehicles with the version "1" A/C system, an A/C Control Head Climatronic Control Module (J255) with the "Comfort" A/C system, with
part number " 8T1 820 043" (for left-hand drive vehicles) beginning with the letter " Q" is installed; the adaptation is changed in adaptation
channel 18. Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
-
A/C Control Head Climatronic Control Head for the "Comfort " A/C system with part number "8T1 820 043" up the letter " S" or with part
number "8T2 820 043"
‹› On the "Basis" A/C system, the A/C unit and the air distribution housing were not changed.
‹› On the Audi A5 Coupe and Audi A4 from MY 2009, the Climatronic control module A/C control head, part number 8T2 820 043 starting with
index letter " Q" is installed (on the Audi Q5 this was already installed since the start of production).
-
On vehicles with these A/C control heads, and depending on the coding and adaptation, for example the display on the screen for the "MMI"
(Multi Media Interface), when using the buttons and knobs, the A/C control head no longer switches to "A/C system". The selected functions for
the A/C system appear in the display sequentially Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding"
function and Owner's Manual Infotainment / MMI.
-
Pay attention to the correct allocation, coding and adaptation of the Climatronic Control Module (J255) A/C control head, for the Front
Information Display Control Head Control Module (J523) / Information Electronics Control Module 1 (J794). Refer to Vehicle Diagnosis, Testing
and Information System VAS 5051 in "Guided Fault Finding" function. If the allocation, coding or adaptation are incorrect, the A/C function
cannot be displayed or selected in the MMI.
‹› The Climatronic control module, A/C control head, (J255) part number 8T1 820 043 up to index letter are installed on vehicles with a Front
Information Display Control Head Control Module (J523).
‹› The A/C control head (J255), part number 8T1 820 043 beginning with index "T" (LHD vehicles) may be installed on vehicles with an
Information Electronics Control Module 1 (J794) and an Information Electronics Control Module 1 (J794). In order to be able to select and
display the different functions, the coding and adaptation must be correct for the vehicle equipment level.