J50 clock date suddenly reset to January 1

[suko]

I've got a 2011 J50 that I imported six years ago. The unmodified factory AV system date and time has always been correct ( Japanese timezone of course ) up until last month.

About two weeks ago, at engine start, the system wished me a happy new year ( in Japanese of course ).

I can't think of anything that would make the system think that the date had changed, unless the GPS component has failed/reset somehow ?

I checked the GPS reception in the system settings, and it can still see the satellites.

Has any other J50 owner had this happen ?  It's no biggie, just annoying that it tells me the wrong date anytime I start the engine. 😅

[niZmO_Man]

Low battery? Maybe check capacity?

I know first-hand, on BMWs if your battery drops below 80% capacity, it starts causing strange issues.

[suko]

Thanks for that tip, niZmO_Man. I think the battery is OK. It's quite a new one, but I'll check. Last time I needed a new battery, everything electronic was fine, except that there wasn't enough current to turn over the starter.

I decided to order one of the partial AV system translation CDs from Car Audio Workshop in NZ. That might have some effect, or help me diagnose the date problem. 🤞