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 > < Fault table for convenience data bus faults

Locating faults in convenience data bus

–	With the ignition off, connect the vehicle diagnostic, testing and information system -VAS 5051- via the diagnostic cable -VAS 5051/5A-, for example, to the 16-pin diagnostic socket in the vehicle → Chapter.

–	Switch on the ignition.

–	Select function “00 - Interrogate fault memory - Total system”.

Indicated on the display of the vehicle diagnostic, testing and information system -VAS 5051-:

All the address words stored in the vehicle diagnostic, testing and information system -VAS 5051- are now transmitted in succession to the vehicle via the signal wire

Indicated on the display of the vehicle diagnostic, testing and information system -VAS 5051-:

t	Display zone -1- shows the address word which is currently being transmitted by the vehicle diagnostic, testing and information system -VAS 5051-.

t	The control units that have responded are displayed in display zone -2-. The number and type of the faults stored in this control unit are also displayed.

–	Wait until “Function completed” appears in display zone -1-.

Note

t	If a different or additional fault has been stored in a control unit with which the other control units cannot exchange data, then this fault must be rectified before checking the data bus wiring system.

t	If there is a fault in a control unit, problems may be encountered with data exchange with other control units although the fault does not directly affect the data bus system.

t	Check the part no. and corresponding index of the control unit with which there is no communication. → Parts List

Heating, ventilation, air conditioning system
Heating, air conditioning system / Self diagnosis, V.A.G Inspection Service
Checking the convenience data bus system / ecking_convenience_data_bus/">Checking convenience data bus
Locating faults in 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 > < Fault table for convenience data bus faults

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 / ecking_convenience_data_bus/">Checking convenience data bus Locating faults in convenience data bus

Heating, ventilation, air conditioning system Heating, air conditioning system / Self diagnosis, V.A.G Inspection Service Checking the convenience data bus system / ecking_convenience_data_bus/">Checking convenience data bus Locating faults in convenience data bus

Heating, ventilation, air conditioning system
Heating, air conditioning system / Self diagnosis, V.A.G Inspection Service
Checking the convenience data bus system / ecking_convenience_data_bus/">Checking convenience data bus
Locating faults in convenience data bus

Heating, ventilation, air conditioning system
Heating, air conditioning system / Self diagnosis, V.A.G Inspection Service
Checking the convenience data bus system / ecking_convenience_data_bus/">Checking convenience data bus
Locating faults in convenience data bus