DIS 1 not self resetting

[Stringster]

My DIS 1 has stopped resetting itself after a inactive period of over 2 hours.

i.e. has the details from the day before when I drive in the morning.

It is performing like the DIS 2.

Does anyone have any ideas what to check?

Thanks!

 

[NHN]

Have you manually reset it & then tested again.