A dealer tech told me that he thought that the list gets updated through the
XM radio, not the bluelink cell connection. Now I believe that, because of how
I had various things disconnected in the car. The cell modem got removed
pretty early on, and the car still had the charger list. Later, I fished a hand in
through the top panel where a speaker would have been and disconnected
the XM antenna out of the back of the a/v unit, and after that it no longer
had the charger list.
After leaving the car that way for several months and having the freebie XM
subscription expire in the meantime, I eventually plugged the XM antenna
back in just to see if the radio would still work. It did for a couple of days
but eventually got re-keyed, so all it has is the "radio ID" station and one or
two news stations about COVID that I guess they're providing for free right
now. But everything else was gone, not even in the list.
However, the charger list is back and apparently still getting updated. So
it's highly likely to be some side-channel via XM, just blasted out to any
radio that can hear the satellites. GPS is still active, so the list includes
how far away the charge points are. [I left the GPS antenna in the whole
time; the car can't *send* anything GPS related without the cell modem.]
I'm really glad I never gave the dealer and thus XM a valid email address,
as I've heard that you get mercilessly spammed if they have one. What came
in the snail-mail was voluminous enough. The horror stories about them
are legion.
_H*
