Originally Posted by
mikemadeit94
So from my understanding of the manual Skeem communicates to the BCM the BCM then communicates to the central locking pump? Basically pressing the button on the unlock/lock dash, as well as the key fob does absolute nothing. So I should start to troubleshoot why the BCM isnt communicating to the locking pump? Also from what im getting from the manual, the locking unit also communicates if the L/R door are ajar? I never noticed a door ajar light on my car while it was running etc. Or should I be starting at page 1256 of the service manual relating to the power going to the Central locking unit.
THat is essentially how I understand the functions. The spoiler switch in the console is wired directly to the BCM. The BCM sends CAN BUS messages to the CLP/SSM. The reason the BCM is central to is all, is that the BCM manages things like interior (dome) lights, and it does this based on input from door and trunk switches, so it "Knows" the position of various hinges. So, if you want to put the top up or down, the BCM has to lower windows to do that.
Also, the BCM knows the status of the top, doors, etc.
My documentation only has section numbers, not page numbers, so I don['t know where 1256 is. All I can say, is to keep reading. The systems are confusing, the documentation is very poor (like all automotive documentation), and there is no 'tech support' to call, other than those of us on this forum.
Get in your mind a good idea of how it all works. The FOB talks to the SKREEM over 400mHz radio, the SKREEM is hard wired to the BCM, the BCM sends CAN BUSS messages (and it's a two-way conversation) to the CLP/SSM and Top Controller. Keep in mind, that if the BCM thinks the top is partway up or down, it will inhibit a few of the CLP/SSM's functions (roadsters only, of course).