Audi Workshop Service and Repair Manuals > A2 > Heating, ventilation, air conditioning system | Heating, air conditioning system | Self diagnosis, V.A.G Inspection Service | Checking the convenience data bus system | Checking convenience data bus | The fault(s) in the convenience data bus is/are only indicated by the operating and display unit for air conditioner/Climatroni

The fault(s) in the convenience data bus is/are only indicated by the operating and display unit for air conditioner/ClimatronicE87:

The fault(s) in the convenience data bus is/are only indicated by the operating and display unit for air conditioner/Climatronic -E87-:

–	Check the signal wires leading to the operating and display unit for air conditioner/Climatronic -E87- for an open circuit or line resistance. Line resistance: max. 1.5 ohms → ”Current Flow Diagrams, Electrical Fault-Finding and Fitting Locations”

Note

Pay particular attention to the possibility of loose contacts in wiring and connectors.

If you cannot find any fault, this indicates that the fault lies in the operating and display unit for air conditioner/Climatronic -E87-.