2007 BMW 530i 3.0L I6 NA everything works, but won't start, juck click and won't turns over.

Question by andrewtran posted 4 months 3 weeks ago in 2004-2009 (E60, E61)

2007 BMW 530i 3.0L I6 NA everything works, but won't start, juck click and won't turns over. Put in new battery, alternator, starter, load is 12.3V - 13.2V when not runing (old school by hot wire from battery to starter with manual push start button enable to start). But when car start and runing with manual hot wire hook up, load is 13.4V - 14.2V, which pretty sure that the alternator is charging.  But can't start from OEM push start button, just a click and won't turn over. 

Hook to diagnose Maxisys mini, and notice CAS got no signal/voltage; therefore, can't wake up DME to triger starter to start. And stuck from here, any advice is very helpful at this point.