Truck is a 2004 dodge ram 1500. I can not read or write a tune in the truck. When I pull the PCM I can get it to read and write on a bench harness. When I go into the VCM Scanner to datalog so I can start tuning the truck does not have all PID's in the scanner. "NO BIG DEAL I will repoll them and should be fine right? "WRONG! only a few basic PIDs pull not allowing me to datalog what I need to tune VE on the truck.
When I plug the PCM back into the bench tester and run the VCM Scanner and do a repoll everything I need shows up. Obviously, I cant scan the PCM for data since it doesn't have any signal to the truck.
Has anyone had this issue before? I guess it would be truck wiring? I think this might be get messy.