I know this sounds silly, but is the button on the turn signal pushed in? That turns it on and off. I have done something similar with the mute button on my motorcycle. If it is pushed in and still not working, then that will probably be a dealer issue to look at.
you wouldn't see green lines on either side of the picture of the truck on the console (or at least grey lines if you're stopped/slow or it can't find the lines)
You can set it to warn, or assist, or both. If assist is on, you'll feel it move the steering wheel to center the truck. If you go over the line and warn is enabled it'll act like you're on a rumble strip. If you're just driving along you won't notice unless you look at the display.
Yes the button is on. That was the first thing checked. It goes into the dealer today. Will let you know the result.
Another thing... there are times when it's not active on slower drives and then I remember to look at my speed.
I noticed that also....after I answered the OP's post, I set my to alert & assist. I did notice at lower speeds it is not active. I think it was around 40mph also. Should look in the manual to see if the speed is in there...but that's too easy for me!! Just ask the wife
Yea, it's in the manual. lolI noticed that also....after I answered the OP's post, I set my to alert & assist. I did notice at lower speeds it is not active. I think it was around 40mph also. Should look in the manual to see if the speed is in there...but that's too easy for me!! Just ask the wife
It's amazing how many answers are in there w/ a FIND search of the PDF version. 
The dealer replaced the switch in the turn signal. Works now.
On a nice smooth lined or straight stretch of road like the freeway or a wide open highway, I've found it to be pretty good in assist mode. I've never had it launch me into the next lane. It usually shoots me back into the lane with the same aggressiveness that I was leaving (i.e. a shallower angle against the line will just glance me off, but a sharper angle will force me back at the same angle, which would then make it start to ping down the lane bouncing between lines pretty aggressively if I didn't intervene). For me it gets wonky when the lines start peeling off for turn lanes or are starting and stopping a lot. Then it gets confused and/or wants to follow the line for the turn lane and peels off the road or misses picking up the line again and doesn't do anything. This is the first vehicle I've had with this feature, so I have nothing to compare it to. My wife's new Escape has the lane keep system, but I haven't driven it yet so I'm not sure how different that one is.
I leave it in aid mode. It's not nearly strong enough to override me if I'm paying attention, and I figure it might just save my butt if I'm distracted someday.
