Oh, okay, I see what you're saying, sounds like this vehicle has been hacked up. I would say that if the wiring is okay from the Antenna to the BCM, and a lot of aftermarket installations, it's very possible the aftermarket gear has something to do with it. There is a TSB on aftermarket equipment interfering with keyless entry components. Another thing to consider is that the wiring in this vehicle is hacked up, and that's why the driver side window doesn't work anymore. Since that switch controls all the other windows its probably shorted out wherever they cut the wires for the other windows.
If the Antennas are all the same part number you could try to switch one with the other, but this again we have no way of knowing because there are no wiring diagrams out for this vehicle yet that I can get.
This is the 2022 OEM diagram of all the keyless entry antennas, and I have no idea if this is the same as the 2023, but you could use an oscilloscope at the BCM connector X6 across pins 7 and 8 and see if you get any signal return using a key fob at the rear of the vehicle. There is also this connector X953 pins 15 and 35 which the antenna is in series with.
If they are willing to pay for diagnostic time on this, I would scope the antenna at the rear bumper and see if there is a signal, if there is Id move to the BCM looking for the same signal. If it's not there, then go after this connector in the middle of the wiring, notice this wiring should be a twisted pair all the way back to the antenna.
Besides that, with all that aftermarket equipment, there's no way to tell if any of it is interfering with that antenna signal besides scoping it and watching for interference. There's a lot of Antennas in this vehicle.
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Sunday, October 22nd, 2023 AT 8:23 AM