No start, battery dead?

It's worth knowing that the car can set these INF codes in two stages. You can see that the 526 code doesn't really tell you anything specific about where the leakage is.

In normal operation, you can think of the car as kind of keeping one eye out for signs of insulation leakage, and if it spots any, it isn't able to tell exactly from where. So it just sets P0AA6(526) at that stage, as sort of a "note to self: saw some leakage, watch closely next start to catch where it's from". So the next time the car is started, it sees that it already has recorded a P0AA6(526), and says "oh, right, I need to watch closely now for where that leakage is", and after figuring that out, it will set one of the other three specific codes.

So sometimes you can connect a scan tool and see only a P0AA6(526), which doesn't tell you specifically where the problem is, but all you have to do is not clear that code and after the car's been turned off and restarted, scan for codes again and one of the specific subcodes should also be shown.