Key Fob doesnt lock/unlock Doors or Trunk

[andrewwynn]

There are decent YouTube videos online. The sequence is similar to this: put in the first key turn to "on" not start then remove the key while holding the lock button and keep it pressed while tapping the unlock button 3 times. (I might have the buttons backwards).

You need to have the doors closed and cenral lock either locked or unlocked I forget which but it can't be in the middle the system will toggle the door locks on to confirm I just never remember if you start locked or unlocked but it won't work if backwards.

The antenna must have power and the correct procedure to test is confirm an output square wave signal when it received a command from the key. When not working the main wiring problem is through the rubber boot going from hatch to body wires will break in that bundle.

Odds are good you just didn't follow the procedure or the key is not working because the button switches have failed or the solder joints have failed inside. Do you have more than one key?

You can test the key atcsome stores that sell batteries: home Depot for example, they have a device that lights up when it senses the signal from a key.

Otherwise find my key repair thread where I have a photo of where to measure the key voltage with needles. If you measure voltage while pressing buttons, it will drop a little while holding the button (example: 3.1 drops to 3.0). No drop, button or solder joints failed.

You need both lock and unlock buttons working to program the key/s.

I start by making sure the buttons are working by measuring voltage then run the relearn procedure. If it doesn't work you probably have a wiring problem to the dv amplifier.