Hi. So it sounds like a no communication problem due to a shorted 5 volt sensor taking down the system. The first thing I would do is connect the scanner and disconnect the crank sensor and see if it will communicate. If so the crank sensor is bad. If not keep trying with the 5 volt sensors disconnecting one at a time.
tested crank sensor no change in symptoms. what next?
You disconnected it? Just want to make sure. From there I would start disconnecting the 5 volt sensors. Tps,map,a/c pressure transducers, speed sensor, o2. Anything that has 5volt sensor ciruit in it. Also, just to be safe, check all the fuses.
Here is what should be on the data link connector.
Thanks for your help so far. I'm not well versed on dodge electrical troubleshooting. We did check the crank sensor by unplugging it and still couldn't link up with my scanner. I also notice that while it doesn't link up the words no buss display at the odometer . I can check all of these sensors I just don't have the location for most of them. I'm going to pay you now and I will follow up with you on this vehicle. Thanks. Chuck Varner
Hi. Finnally found the problem on this truck. We checked the crank sensor by unplugging it but we reached in from th top over the motor to do it. When we checked it. Still wouldn't scan. We checked everything. So we made the decision to change the crank sensor. When we did we were under the truck and we found the problem. A ground squirrel or mouse chewed the wires almost in two. The insulation was completely chewed off and grounding against each other. So we still changed the crank sensor and it wouldn't start but we didn't get the no bus message. So we cranked it and it still wouldn't fire but We have spark now. No codes came up. I dont have fuel pressure but the truck will start with starting fluid. But dies when you quit squirting it in the throttle body. I have no fuel pressure but there was a small amount of gas at the schrader valve. What do you think?Did we fry the ecm with the bad wires? I'm going to check for power feed at the fuel pump in the morning. If we don't have power there I just wonder what else it could be. If we have power it looks like I'll be changing the fuel pump next.