Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
bmw 2006 525i no crank no ignation
when put key in ignation is tern but do nothing like no battry
my feriend told me due to scierty it will not open the ACC if key missing the transponder i scan for code no code
i check all fuse and i chack the coil ring by vvdi key tool and it try to read the key
I suppose you checked battery voltage and that starter has good power and ground?
I don't have personal experience with these cars but I know the battery ground cable is not just plain old cable. There's some electronics in the cable with it's own microprocessor I think that monitors battery parameters. And it's known to go bad often causing all kinds of electronics problems possibly even no start. So maybe it's something to look at.
Are you using BMW specific diagnostic tool to read the codes?
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