My remote, when not in range, blinks the antenna 11 times then displays ERROR. With it erroring that quickly, I wonder if there is something wrong with the remote itself or if it is picking up interference.
The antenna connector is not easy to get to, but can be found under the trim piece at the base of the right hand side sail window (small triangular window just ahead of the front door). There is a small, black co-ax cable that plugs into a slot mounted right to the glass. It might also be possible to get at this connector from under the dash, but there are differences in construction between the NA and EU versions.