328i no crank no start ,need help diagnosing with ista

[Kent L]

Hi all , new to forum and bmws and trying to troubleshoot daughters car , It was starting fine but all of a sudden had a no crank no start issue . Car is a 2008 328I vin A451098 . I was able to get Ista to hook up to help diagnose . It shows I have multiple com problems with several modules red all seem to be giving codes related to terminal 15 .Not being super savvy on troubleshooting electrical issues any tips on where to start with this. Thanks