Your vehicle has a data line that runs between modules. It's called a CAN (controlled area network) bus. The data bus has failed and the modules can no longer communicate with each other. This is usually caused by a short in one of the modules that sends voltage down the data bus instead of digital data. To diagnose this yourself you'll need a good shop manual to find where all the modules are. Try either alldatadiy.com or eautorepair.net. Then unplug one module at a time until the problem goes away. That will be the shorted out module.

If you disconnect all the modules and the problem still exists, then you have a shorted or open CAN bus. But that's fairly rare.