My 2017 XJL 3.0 diesel portfolio with 30k milage full service history, has out of date maps easy fix,,,,NOT apparently my car needs a TCU upgrade that may or may not fix the issue or may compromise the TCU and head unit, cost of upgrade about £250 cost of fixing if it fails and compromises the vehicle £ 0000  and a new or second hand may not work as it maybe out of date, like me to old. So unless someone has a idea or a spare bank account. A Collins road map is the way forward. 

out of date map has nothing to do with tcu? and compromising head unit relates to head unit software update...

find specialist who updates jag systems for a living. quite often they are mobile.

I agree the maps are nothing to do with it but ,but the maps cannot be updated as the  TCU and IMC are out of date preventing the infontain system to operate correctly. Jaguar Land Rover say it won't effect my vehicle Lloyds jaguar aren't as confident.  But they'll take £203 for the privilege.

Finally solved map upgrade issues. Jaguar where excellent 🏆Lloyds jaguar Houghton le spring did themselves proud with a little backwards and forward.  Dropped of car 8 courtesy  car, washed, hoovered returned by 4 . TCU &IMC update. Now my car is talking and I can update maps and live coverage.  Cost was bearable, experience sometimes frustrating but a positive outcome