Positive terminal first on reconnect. Also, before disconnecting leads, let the LR2 do it's "shut down cycle" for about 3-5 minutes.
Here is a video:

Be aware that the sunroof and each door window may require recalibration afterwards.

 

Oof. Motormouth. That was painful. Useful, but unnecessarily verbose.

 

Did this. Still doesn't work right. How is it possible for this to happen just from disconnecting the battery? This is ridiculous.

 

If you have a code reader that will also clear any codes (?), give that a try. Some will allow you to reset some control modules.

 

I just ordered a more advanced one, the iCarSoft 2.0 for Land Rover and Jaguar.

On a hunch I also went through the wiring schematics to see what those systems have in common. Sure enough, the signals for SRS, TPMS and the key handset come to the central computer on one connector. I think it either came loose or something/someone knocked it loose. I will have to take out the glove compartment, find that connector and reseat it. I am betting that will fix this.

 

You may simply be able to peel back the passenger side footwell carpet and locate the BCM(?) after removing the flip and hang cover. Re & re the three connections or simply try seating them better. Be careful with the cover as I almost broke mine as I assumed it was a pop off. Stupid place to to put any module.....

 

Not sure what you are referring to. Diagram?

 

 

Ok, thanks. What does BCM stand for?

 

Body Control Module