BMW Ignition key problem

[BMWSergio]

Does anybody know how to test BMW 530i E60 Ignition key system?
This is contactless type, 14 pins connector (Ribbon cable)
It employs 4 Hall sensors as a switch ignition input signal (OFF, ACC, ON, Crank) for CAS to turn on power Terminals 30, 15 . . . !
Is it possible to supply 5Vref and ground and measure the 4 output signals for the 4 Hall sensors at key harness side as I turn the physical key simulating each turning position of the key so that I would know if the problem is the CAS module not getting the signals or the key cylinder itself? CAS has no fault memory code!
This is the second ignition cylinder key replecement.
There’s some attached material I found on my search.
I’d really appreciate your help!
Tks,

The car will not crank, nor the ACC and ON position has response the scan tool said there’s no key in the ignition cylinder so, I replaced the ignition key cylinder still the same thing. I might have got a defective one or not. Before condemning an expansive CAS unit I want make sure the ignition key is processing the signal to CAS properly.

[aade]

From your detailed explanation I surmise you want to measure four lines and ground. You could either hook up 4 multi meters and set a camera on them to record your results or plug in a four lead scope. I use Picoscope because I’ve learned how to use it, but even a simpler variant would work for your use case, just make sure it is a four-lead. Logging to a computer might also be advantageous.