Hi 1Sweetride,
I have almost the exact same symptoms that you have described - 2005 a/t roadster limited, no crank, black square showing in the instrument cluster, RCM checked by swapping with one from a working crossfire. I'm about to remove the SLA from the car (tried spraying cleaner and vacuuming the area, but no joy) to clean it out. You mentioned that by unplugging and re-plugging in connector C207 you got your IC to show the shift position. Looking at the service manual, it mentions that C207 is in the passenger wheel well, but the service manual points to the engine compartment in fig. 2. Could you tell/describe where C207 is exactly located?
BTW, I have the micropod II DRB III clone - I can communicate with the IC, the TCM, and the SLA - both the SLA and the TCM communicate the correct position of the shift lever, but the IC just shows a black square. I can command the IC to enable or disable the shift position indicator, but that doesn't change the no crank condition. So, I'm thinking I have a problem with the PCM not getting the data from the TCM and SLA - maybe my C207 connector is the issue (crossed fingers). The codes were P0600 and P0720.
Thanks, sincerely
-Jerry