Modern cars are really susceptible to power `spikes’ when the battery is being reconnected. Often, these power surges can damage electronic equipment and perhaps that’s what’s happened to the unit in your Territory.
If that’s the case, the unit will need to be removed and repaired by a specialist. The worst-case scenario may involve an entire replacement ICC. It could also be that the ICC requires a code to re-boot it after being disconnected from a power source. If that’s the case, a visit to a Ford dealership might be all that is required.