The trunk on my coupe opens about 6 inches then immediately slams back down. Has anyone had this issue before? I attached a video.

 

Haven't seen that but it sounds like it's confused about its limits. It can be trained to only open a limited amount. I think that if you push the "close" button before it closes, then push the hatch all the way open, it will remember that. If someone has better information, I'm sure they'll correct me ;^)

 

It's a ghost.

I can't find the height limit instructions in my manual (it will be in there, I just can't find it!) but on the XJ the procedure is:

• Open the luggage compartment lid to the position of the required height.
• Press and hold, for 10 seconds, the luggage compartment lid close button.
• Close the luggage compartment lid, then open again to check that it opens to the programmed height.

If manually opening to full height then following those instructions doesn't fix it then the easiest option is probably to disconnect the battery for 10 seconds then the tailgate module will be reset. The first close after that will need to be done by hand and then the power actuation should work again. If it still does it after that then consult an exorcist (or a dealer).

(One-touch window closing will need to be reset after a battery disconnect. When closed fully release then hold the close switch for 2 seconds until you hear a clink to reset.)

 

 

Turns out this was just a result of me being a dummy. The day before I had stuffed a bunch of luggage in the trunk causing the cargo cover to go out of alignment. It was positioned at an awkward angle that was causing there to be too much resistance on the hatch to open. I had to pull the drivers seat forward and jerk it around so then the hatch could open. The hatch is pretty powerful when slamming shut like that...it takes a good amount of force to stop it and not have your hand crushed.