2001 Audi TT no comunication at all no module respond

[koziolek]

I have a problem with 2001 Audi TT
Have no communication with moduels
using launch diagun and vcds 10.6
radio is disconnected
I read on another forum that ABS might be the problem
also disconnected ,
and still no communication
please help

[koziolek]

Still need help

[koziolek]

I have some update
when ignition is off I have 5.9v in a pin 7 on diagnostic plug
when ignition on voltage drops to 0.6v

[MatygaD]

Hi
Search wire from pin 7 diagnostic socket near socket it connected to star for all ecu's.
Disconnect wire by wire and try autoscan until you find bad ecu.
Sorry for my bad english.

Best Regards
Darek

[koziolek]

when I disconnect instrument cluster some module
come :ABS, Radio, A/C, AirBag, and Headlight ,
so it looks like instrument cluster has something to do with it
but what about rest of the modules? why Ecm and central locking control module and some other not responding?

[miha99]

Because motor ecm signal goes through instrument cluster.

[koziolek]

How about central locking module?

[Ashraf6119]

have you tried to disconnect the Radio and see if that helps................

[koziolek]

Yes I disconect radio no help

[koziolek]

so no help at all?

[Ashraf6119]

Try disconnecting the Central Locking Module as you don't have communication with it..............it could be that's where your fault is............worth trying...........