Couple things to start. First, does the light turn on with any of the doors?
If it doesn't come on with any door opening, then more than likely the ETACS is the issue, and not telling the switch that the door is open.
The way to confirm this, is to check the voltage on the highlighted wire below on the wiring diagram.
https://www.2carpros.com/articles/how-to-check-wiring
If you have no voltage on this wire when the door is open, and you have them turned on then the module is the issue. The only other possible cause is all the door switches have failed, and that is highly unlikely.
I attached all this info below. Please run through this and let me know what questions you have.
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Tuesday, November 30th, 2021 AT 11:45 AM