Thank you for your input Les. I really appreciate it That sort of sounds similar to, at least in part, to what the service rep told me from Lexus. That maybe it was the SOS system communication. She said I could just press the button and tell the people on the 'other side' to disable it. ...but when I press the button it has a recorded voice that comes on with prompts saying it is disabled and to enable follow these so and so steps. That has me wondering about he Navigation system, I am thinking at least.
The service rep also noted to me that 2017 and older models (I have 2015) have the internal WiFi disabled or not communicating she said because of the switch to 5G for newer models hence none of the apps work.. but something is transmitting for Navigation.
Unfortunately definitely more than fears. I can not drive the car for more than an hour or two, sometimes less, without getting symptoms,. You may have hit on something when you said it is like a cell phone. I still have an iphone 6 4LTE and have been ok with that, but the newer cell phones make me sick (5G etc, don't know what I am going to when the iphone 6 finally does quit, but so far so good)
If the SOS system of the DCM is already disabled then cutting of the Nav system shouldn't translate to alarm over to Lexus, would it?
This is very hard for me to interpret as I am not a electronics/car person by any stretch. I just love Lexus RX for a lot of different reasons. I really don't know anything and am doing my best to understand and seek help where I can like these forums for any and all insight. I am taking it to a shop at some point too, to have it investigated but seems this is nothing anyone has dealt with.
Thank you so much. Maybe others will know too and can weigh in 🙏