This is not true. The compressor will not run if the system is empty but the PCM will still command the fans on if it needs it.
We need to run through the testing for this code that I attached below. More then likely you have a wiring issue or a relay issue but if you checked the relay then that would leave wiring.
Let me know if you have questions with this testing and we can work through it.
Images (Click to enlarge)
Thursday, February 25th, 2021 AT 3:39 PM