Update. The used ECM that I picked up can’t be reprogrammed. The Auto Electrical place called Toyota and they said that a new ECM from Toyota is required. There is some data that is on the old ECM that can’t be rewritten that is not allowing the 4runner to start. They are not trying to sell me a new ECM, but Toyota is for sure. Does this sound right? I am going to relook at the posts
@
waypoint
and @oldred provided and see if there is a procedure to wipe the old ECU clean for a fresh load.