Power button unresponsive in hot weather

Yeah I've been putting the key in the slot just to make sure it wasn't a problem with the key.

 

I pulled the glove box out to check out some of the wiring in the dash and I saw this broken brown wire. What is this for? The photo was taken in the glove box area looking at the driver side. It's near the key fob slot.

I also found a little mouse house and some droppings in the tray under the blower motor so I'm preparing myself for some rat damage.

 

Ok I think I figured this out. I replaced the negative battery cable with a new OEM cable from Toyota and it hasn't had any issues starting even after sitting a few days in 90 degree weather. I guess it really does always comes back to the 12v system. It turns out the broken wire in the dash was unrelated to the starting issue, but it did fix the intermittent screen flickering issue I was having.

 

It seems I may have spoke too soon. The car wouldn't turn on again today, but I've noticed if the key is far away from the car when it's off, no issues. But as soon as the key is within like 20 feet of the car for too long, like 15-20 minutes, it won't turn on until I disconnect and reconnect the 12v battery. But before that, I was able to drive it long enough to get a P1121 code. The heater doesn't seem to work so I'm guessing that's probably why. Is there any way a failed coolant control valve can be related to the car not turning on? The car does go into Ready mode without issue when it does turn on.

 

Yeah I got a different angle when I pulled the dash apart. There's two brown wires that were broken that I reattached to the metal piece they broke off of.