A6 Quattro Wagon V6-3.2L (BKH) (2006)
Control Module HVAC: Description and Operation
Climatronic Control Module A/C Control Head
Climatronic Control Module A/C Control Head
‹› The Climatronic Control Module (J255) A/C control head is available in different versions ("Comfort" and " Basic"), different trim colors (pearl
gray metallic, Nero) and there are variants of these versions. Assign the correct version and variant when replacing the Climatronic Control
Module (J255) A/C control head.
‹› As of model year 2006, the Center Outlet Temperature Sensor (G191) has been gradually discontinued, on vehicles without this sensor, only the
Climatronic Control Module (J255) A/C control head with part no. 4F1 820 043 as of index "M" (vehicles with left-hand steering), or part no. 4F2
820 043 as of index "F" (vehicles with right-hand steering), is or may be installed.
‹› In vehicles without Center Outlet Temperature Sensor (G191), if a Climatronic Control Module (J255) with part no. 4F1 820 043 up to and
including index " L" (vehicles with left-hand steering), and similarly with part no. 4F2 820 043 up to and including index "E" (vehicles with
right-hand steering), is installed, the missing sensor is displayed as a malfunction.
‹› The Climatronic Control Module (J255) A/C control head with part number 4F1 820 043 as of Index "M" (for vehicles with left-hand steering) or
4F2 820 043 as of Index "F" (for vehicles with right-hand steering) has been installed since 5/2005 as a rolling change in vehicles with the Center
Outlet Temperature Sensor (G191) (the sensor's measured value is no longer required for control by these A/C control heads and therefore no
longer evaluated).
‹› A/C control heads cannot be exchanged as usual. Component protection becomes active once a Climatronic Control Module (J255) A/C control
head is programmed in a vehicle => Vehicle Diagnosis, Testing and Information System VAS 5051.
‹› If a Climatronic Control Module (J255) A/C control head with active component protection (anti-theft system) is installed in a different vehicle,
only the functions necessary for vehicle safety can be selected, comfort functions can no longer be selected. => Vehicle diagnosis, testing and
information system VAS 5051
‹› Component protection can only be cancelled by entering specific vehicle data => Vehicle Diagnosis, Testing and Information System VAS 5051.
‹› The selected functions are displayed by illuminated LEDs in the various buttons of A/C control head Climatronic Control Module (J255).
‹› Display fields and control buttons on the Climatronic Control Module (J255) A/C control head are illuminated by light emitting diodes (these
LEDs cannot be replaced).
‹› The Climatronic Control Module (J255) A/C control head is not always connected to terminal "15", therefore after voltage supply interruption (via
connector - D -) wait at least 30 seconds to protect the electronics until the remaining connections are disconnected.
‹› If a new Climatronic Control Module (J255) A/C control head was installed and Basic Setting was not performed, A/C system controls are
restricted and this is displayed as a malfunction in DTC memory. => Vehicle Diagnosis, Testing and Information System VAS 5051.
‹› After replacing Climatronic Control Module (J255) A/C control head , perform the follow work steps => Vehicle Diagnosis, Testing and
Information System VAS 5051.
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Check coding.