So recently when I have been getting out of my 03 G35 coupe my headlights won't turn off. I have them set to auto and up until a couple of days ago they have always turned off by themselves. I have made sure that both doors are shut and so is the trunk. Does anyone know what could cause this to happen?

The dealership can program the BCM with different delay settings for the headlights anything between 1 and 180 seconds delay. Use a stopwatch and find out what yours is currently set at and if you don't like it take it to Nissan and have them reprogram it. Not totally sure if NDS2 can modify headlamp delay set but it -probably- can.

If it's taking longer than 3 minutes to turn off then something is awry and needs to be troubleshooted.

Negative. I've never been able to connect to the bcm. This might be a dealer only thing. Sucks because it looks like a useful tool if I was able to connect to it. I think you can only do diagnostics and active tests on NDS