Are you saying the low beams do not turn on when the car is running, but the low beams do function when you turn on the headlamps?
I had both headlight low beams blow out at the same time one day. They were both working the evening before and I noticed they were not reflecting back at me in a glass store front as usual at lunch. I immediately bought bulbs and replaced them so I wouldn't drive home risking a ticket that night.
Short of that, the daytime running lights feature can be turned on and off with the remote on your key and a certain combination of switch operations on the car.