This seems to be a common thread but bare with me. Firstly I only have one key, it starts the car and its the 3 button type... Unlock > lock > tailgate.
It didn't work when I got the car whatsoever, so I proceeded to change the battery. Tried the 2 programming methods that you can use if you don't have a working key.. Turning ignition to 1 accessory and also turning it to 2 the run position. Mainly because each post I seemed to read told me to switch it to accessory then the other said to turn it to run or position 2 before start. I have also switching the ignition on and off 5 times in both positions to reprogram the key.
Me being me didn't think to check the output voltage of the battery that was already on the transponder, which happened to be normal. just above 3 volts. So then I proceeded to check the 3 buttons with a multi meter. They are all fully operational. The car just wont accept or aknowledge the key at all.
Here is what I do. I open the car, get into it then close the door, Not locking it. Then i proceed to turn the ignition to 1, or 2 (tried both combinations and the on/off 5 times in both positions) then I remove the key and hold the unlock button,. Then whilst holding the unlock button firmly I press the lock button 3 times then release the unlock button.
And nothing happens.. nothing at all.
Any help would be greatly appreciated. If it were a Infra red remote I could test it with my infra red camera to see if it is putting out a signal, but I'm guessing its a radio transmitter instead.