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Lost Functionality - Intersection Screen, Route Recalculation, Time To

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Had my RX400H for 12 months now and know my way around the Nav System pretty well. For some time now though I have been without some basic system functions and cant get them to return.

Lost Functionality:

Intersection screen (normally accessed by pressing the right turn icon) no longer appears when approaching turns.

when I go off the guidance route the Nav system doesn't recalculate a new route and put me back on course.

Time to destination doesn't appear anymore (only -:--)

Detour Setting icon no longer available

Relevant pages of the user manual are: 44/45/49/54 but i do not know how to troubleshoot this lost functionality.

Everything else works fine.

Hoping you can help

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