04 Sequoia no ignition no crank possible remote kill switch?

I am working on my wife's 2004 Sequoia limited when the temperature outside gets over 100°, we get no ignition and no crank. Our normal starting procedure when we put the key in turn the ignition on the mobilizer light goes out and then we have a remote key fob that we have to push which turns the ignition and fuel pump on and then it will crank and start normal. When temperature is hot out the key fob Well will not turn on the ignition or let the vehicle crank. I am guessing there is a remote wireless kill switch somewhere in the system I have torn the inside of the car apart trying to locate it with no luck could this key fob be hooked to something stock on this toyota? The key fob looks like it's a stealth it's black with two blue buttons. If anyone has any suggestions please help!! It's been progressively getting worse and now only works randomly