NobbyonDaNET Posted August 31, 2021 Share Posted August 31, 2021 Basically months ago I had a battery problem and had to replace the battery. At th he time I had no problems with the central locking of the key or windows but after the battery was changed to an OEM standard replacement these things dont work at all. The only things working is the speaker and mirror control.. it's been plugged in loads of times with no codes and looked st th he wiring and seems theres no breaks i can find.. Anyone got any ideas it's doing my tree in ? Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted September 1, 2021 Share Posted September 1, 2021 Hi did you have the BEM recoded to accept the new battery, the foolproof way to change the battery is to have a spare power supply to the jump terminals when changing as this prevents the window and any other ancillary from loosing its codings. Steve. Quote Link to comment Share on other sites More sharing options...
NobbyonDaNET Posted September 3, 2021 Author Share Posted September 3, 2021 On 9/1/2021 at 7:36 PM, Stevey Y said: Hi did you have the BEM recoded to accept the new battery, the foolproof way to change the battery is to have a spare power supply to the jump terminals when changing as this prevents the window and any other ancillary from loosing its codings. Steve. No mate just swapped it over.. Done it before with no issues except resetting the window auto part by sending the windows all the way down then up.. This time tho neither windows or central locking works an no codes reported Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted September 3, 2021 Share Posted September 3, 2021 8 minutes ago, NobbyonDaNET said: No mate just swapped it over.. Done it before with no issues except resetting the window auto part by sending the windows all the way down then up.. This time tho neither windows or central locking works an no codes reported Hi that would suggest that you got away with it last time, but the fact that you have no recognised codings to allow the can gateway to initiate the commands to those functions the BCM thinks they don't exist, hence no codes believe me I did it with a BMW they all work on similar principals and the Audis are all documented on line for doing this, Google it and see. Quote Link to comment Share on other sites More sharing options...
NobbyonDaNET Posted September 8, 2021 Author Share Posted September 8, 2021 On 9/3/2021 at 4:08 PM, Stevey Y said: Hi that would suggest that you got away with it last time, but the fact that you have no recognised codings to allow the can gateway to initiate the commands to those functions the BCM thinks they don't exist, hence no codes believe me I did it with a BMW they all work on similar principals and the Audis are all documented on line for doing this, Google it and see. Someone else said that too that the codes on the door parts are lost and cant find them to operate them Quote Link to comment Share on other sites More sharing options...
Stevey Y Posted September 8, 2021 Share Posted September 8, 2021 46 minutes ago, NobbyonDaNET said: Someone else said that too that the codes on the door parts are lost and cant find them to operate them Hi keeping the power supply continuity preserves the codings until you register the new battery, as if you don't marry the new battery up with the BEM it carries on overcharging the new battery and kills it in record time. Try emailing Ross Tech with your problem my friend did it with a steering sqib on a Passat and they told him how to recover the codes. Steve. Quote Link to comment Share on other sites More sharing options...
NobbyonDaNET Posted September 9, 2021 Author Share Posted September 9, 2021 Arrrr nice one I'll get onto it later wen I get time Quote Link to comment Share on other sites More sharing options...
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