Hmm, maybe it isn't manufacturer's equipment, but these things are definitely factory installed.

I had the very same thing happen to my '93 Nissan Pathfinder. The entire electrical system was moot until I had a temporary bypass rigged to make the thing operable without the security system.

Of course this was several years ago, but in my case too, the dealer insisted it was an after-market system, regardless of the fact that the alarm remote is a manufacuter's item.

I note that neither the owner's manual for the Pathfinder or VX make any reference to a keyless entry system.

I'm a new-owner, so I'm not all-up on the VXjust yet, but has anyone consulted with the shop manual to see if it provides any specs?