There are many threads which include comments about issues with the Smart Junction Box, but cannot find any that mention this.
There have been a few off and on minor issues in my '07 which pointed to possible SJB problems and there were no glaring signs of water intrusion.
While doing some other work, I decided to pull the SJB and check out the RKE antenna (there seems to be several versions) since mine no longer worked after being intermittent for a while.
It turns out that some of the pins...

SJB fix