Ignition issues

I am not sure I understand what you are experiencing. When you say it is registering the key, do you mean the theft light goes out and the cluster comes on but the engine does not crank?

Maybe get a video of trying to start the vehicle and that will easily explain it rather than trying to describe it. I know it is difficult to make it perfectly clear with what is happening but a video makes that easier. Thanks

What type of scanner are you using? I am shocked that you don't have codes. This vehicle has an electrical system call Compact US Wide. That doesn't mean much other then it is very sensitive to modules being offline which is what you have. It is either caused by a faulty module or a wiring issue causing communication issues.

Long story short, I have battled many Darts with this issue.

Your scan tool just doesn't seem to be able to pull the needed codes but is recognizing there is an ECU not communicating. Unfortunately your tool doesn't appear to be able to tell which ECU. Your vehicle has about 15 modules that could be the cause.

I know it is asking a lot but is there anyone else that you know that has a scan tool just to see if their's can pull the codes out this?

Okay. Sounds good. Clearly this could be a number of different things. However, from my experience this issue is normally caused by a wiring issue or a control module issue. The last one that I had that was acting very similar, I found a connection to the BCM was not seated properly causing it to not be able to communicate with all the other modules.

Please keep us updated with what the find. Thanks

This is not easy. The first voltage measurement is easy but from there it gets very complicated. I just want to say this upfront.

You want to go to the data link connector (where you plug the scan tool in to pull codes) and put your red lead of the multi-meter in each of the pins circled one at a time. The black lead needs to be on a good ground for each one.

Write down each pin and tell me the voltage. You do this with the key in the on position.

Let's start there and depending on the results we can decide what to do.