I have a 1999 Land Cruiser with only one key which I’m told is the master key. I bought a replacement key online. The master key fob doesn’t wirelessly unlock/lock the doors so I got the new one hoping that would resolve. However, I can’t even program the new remote. I get the LC to go into programming mode but pressing unlocks/lock followed by lock on the new key does nothing. Now I’m starting to wonder if the wireless reciever or whatever could be busted but have no idea where to look or troubleshooting.