Automatic Climate Control System, On Board Diagnostic (OBD): Function
WARNING: This page is about a different car, the 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
The A/C operating and display module, Climatronic Control Module J255 is equipped with a DTC memory.
After evaluation, the operating and display module, Climatronic Control Module J255 distinguishes between different malfunctions → Diagnostic Trouble Code (DTC) table and saves them until the DTC memory is erased after check.