Just had some body work done to my '05 TL with navigation and got it back without a working XM Bluetooth interface (unrelated, but troubleshooting that issue is what got me here). I started to dig into the diagnostic menu on the Navi, and found that both my B-CAN and F-CAN systems tested bad. I only just learned about this menu's existence a few months ago, so I can't say whether this was happening before, but it's definitely happening consistently now (regardless of key position, engine running/not, etc.)

What's strange is, I don't think this is causing me any issues, but per the B-CAN test page, my headlights, wiper switch, door switch, A/C Unit, and some others I can't decode should not be working.

I've dug around here a bit and wasn't able to find anyone with similar issues, but if anyone has any experience with this, let me know. I'm posting more out of curiosity than anything, but I'd still like to get to the bottom of this.

Thanks!