Notes On Front A/C Control Head Climatronic Control Module J255

Notes on Front A/C Control Head Climatronic Control Module J255

- The front A/C control head Climatronic Control Module J255 is available in different versions, "Comfort" and "Basic", and there are differences of these versions again. Therefore follow allocation exactly when replacing front A/C control head Climatronic Control Module J255.
- "Comfort" version of front A/C control head Climatronic Control Module J255 with the "component safeguard" function may no longer be exchanged in the familiar way, as soon as a front A/C control head Climatronic Control Module J255 "Comfort" version has been adapted once in a vehicle, the component safeguard takes effect.
- If a "Comfort" version front A/C control head Climatronic Control Module J255 with active component protection (anti-theft system) is installed in a different vehicle, only the functions necessary for vehicle safety can still be selected (Defrost, heated rear window, etc.), Comfort functions (direction of air flow, temperature preselector, etc.) can no longer be selected.
- Component protection can only be cancelled by entering specific vehicle data.
- At this time, front A/C control head Climatronic Control Module J255 "Basic" version is not equipped with the "component safeguard" function (introduction not yet finalized).
- The selected functions are displayed by illuminated LEDs in the various buttons of front A/C control head Climatronic Control Module J255.
- Display fields and control buttons on front A/C control head Climatronic Control Module J255 are illuminated by Light Emitting Diodes (these LEDs cannot be replaced).







- Front A/C control head Climatronic Control Module J255 is not always connected to terminal "15", therefore after voltage supply interruption (via connector - D -) wait still at least 30 seconds to protect the electronics until the remaining connections are disconnected.
- If a new front A/C control head Climatronic Control Module J255 was installed and Basic Setting was not performed, A/C system controls are restricted and this is displayed as a malfunction in DTC memory.
- After replacing front A/C control head Climatronic Control Module J255, perform the follow work steps.
- Check coding.
- Perform basic setting.
- Check adaptation.
- Check DTC memory of front A/C control head Climatronic Control Module J255 (and of Rear A/C Control Head (Climatronic) E265, if present).