I recently was working on a 2010 Nissan Maxima which Push start button is standard equipment, however I only can start the car with the Key into the slot, and was not starting or turning switch on with just key inside of the car, but I-key was able to lock / unlock doors on the little switch, and also all of the FOB functions was working properly, I was not having any codes and reprogram key many times with same result, after running circles I found that I key start function and I key lock / unlock can be turning on and off on BCM Work Support menu, after turning I-key option on, Push start did work again with just key on my pocket.

This may be known for someone but I look everywhere and didn't find anything until I read on Identifix OE manuals, and hope to help someone down the road.

Cesar from Texas