An odd problem since NEW!
Mine has been doing that since it was new! What do they call the DRB when it is changed into the osocilloscope reader? I am betting that you have a bad voltage and that ruins everything the system sees? But not the CAN bus! If you do this have them put the reader on the bolt in the PDC and see what the voltage is like? Changing the batteries , Alt, ECM etc doesn't help. I was seeing voltages at the apps of milli volts then 11,47 VDC,( if forgot what the pin # was) I suspect that it is TT logic so it should be 5 volts? The arc was impressed into all the signals. I had (1volt) peak to peak for the fuel shutoff? It is funny to read people having the problems in the last few years that I had when the truck was new.
Mine has been doing that since it was new! What do they call the DRB when it is changed into the osocilloscope reader? I am betting that you have a bad voltage and that ruins everything the system sees? But not the CAN bus! If you do this have them put the reader on the bolt in the PDC and see what the voltage is like? Changing the batteries , Alt, ECM etc doesn't help. I was seeing voltages at the apps of milli volts then 11,47 VDC,( if forgot what the pin # was) I suspect that it is TT logic so it should be 5 volts? The arc was impressed into all the signals. I had (1volt) peak to peak for the fuel shutoff? It is funny to read people having the problems in the last few years that I had when the truck was new.