I have had my 2011 TL SH-AWD for 3 weeks. I notice that once in a while the nav screen will slightly dim for a few seconds and then get back to the set brightness. It probably has happened 3-4 times (that I have noticed). Almost like it's not drawing an even electrical current (that sounded so non-technical, I am not an electrical engineer)

Anybody else experience this?

 

Do you recall under what circumstances it happens? The display is light sensitive and will adjust based on the ambient light.

 

only if you have your headlights in the auto setting/or on...i dont run my lights in the auto setting, but your correct about the screen, when i have my headlights on when raining, if its pretty bright out, the screen will stay bright, but if its dark enough, it will dim...it works with the auto sensor up on the dash by the windshield...

 

Thanks guys - I'll keep an eye on it and see if it is related to outside brightness.

 

The most common reason for this dimming is probably driving under an overpass (at a relatively slow speed, like when the traffic is crawling) around dusk.