2012 Yaris VVT-i TR - Touch & Go faults

[Charlie28]

Hi

I have a 2012 Yaris VVT-i TR with satnav. Recently the 'map nav' button has stopped working, as well as the phone buttons on the steering wheel to access the phone feature. I have also tried to access the phone feature through the setup menu and when I press either the bluetooth and telephone button nothing happens. I have tried running a fail diagnostic test (system check) by pressing the car button and turning lights on and off 3 times but hasn't worked.

Radio is fine and 'car' button is fine. Chip gone or loose connection somewhere?

Any help appreciated, thanks