Audi non start, comunication problem.

[Smertel]

Hi. Problem are with Audi a6 c6 2009 Y 3,0 tdi owner of car discribed that changed battery, and added a buletooth module to the socket in the glove box, after that car starts and dies. So I connected VCDS and I dont have comunication with all powertrain modules and allmost all comfort modules, checked all fuses seems good. engine ecu on table bench reads fine, backprobed can line and rezistance is 125 ohms, voltage is 3 volts and 2 volts. Maybe someone knows can line resistor is on engine ecu and on what module ? Maybe someon had similar situation ? Any support or toughts feel free . Thx for everything .VCDS autoscan added

[pawl]

hi it looks like a can communication short, check this bluetooth