Originally Posted by Rob M

In the end the issues with my original RCM related to the transmission, speedometer, and various brake/traction control MILs were solved by replacing the traction control relay. Engine would still not crank and continue running until I cleaned the contacts on the engine and fuel pump relays. So, at some point I will likely need to replace those relays as well. For now the RCM works fine and I have also procured a spare.