When I push the door lock or unlock button on my 2000 disco 2 key fob, what accepts the signal? ECU?? or something else?

 

There is a receiver above the headliner, near the rear sunroof.

 

And that signal from the RF receiver is passed to the BCU, which controls central looking via the IDM module on back of fuse panel. Of course the BCU uses that signal for other functions, like alarm and immobilzation.

It is a very good idea to have a working key fob. On later models, like the LR3, these are quite pricey.

I have long suspected that Rover uses this capacity as a method for the stealership to put new check engine codes in the system when you drive within wifi range. I have no proof to support this, but....

 

No, it wasn't til the newer models that we could turn on the MIL. On the Discovery we were limited to wirelessly turning on ABS lights, and creating coolant leaks.

 

lol...

BTW, some will recognize this photo as the fine dealership near Hilton Head Island.

 

They are about the same price for D2 and LR3. The only difference is that D2 can be programmed used, and for some reason the LR3 remotes can only be programmed once, but they come with the key pre-cut.

LR3 remote

D2 Remote

 

That is about double what a head gasket kit costs. Ouch!

 

Hahaha!

 

Thanks for the info...I only have 1 key for the ignition and driver door. recently the lock on the driver side door just turns and does not do anything. I found someone parting out a disco 2 and has the key fobs, door handle with lock and ignition. Was wondering if I could just buy all the above plus the ecu or bcu and not have to reprogram the fobs at the stealership?

 

Bennyb43, check out this thread I started a few years ago when my door lock quit working.

Driver's door lock cylinder spins - '99 DII - DiscoWeb Message Boards

Sounds like you may have the same problem. This doesn't answer your questions about the keyless entry system but it may help you get your keyed lock working.