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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.

- Check coding.

- Perform the basic setting.

- Check adaptation.

- Query the DTC memory
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