Thread: Key fob died

Originally Posted by Bohica

The key fob does not work. The light still flashes but nothing works, no lock, unlock or start the car. The circuit board looks ok, maybe a bit of corrosion on the board.
Any Ideas? or do I stump up the cash for new one. This one is 29/09/10
And how do I know what bit will have the connection to the car ecu to start it?

I believe you have a Nanocom? In the Valeo BCU menu, I think under "Inputs", there is a button marked RF Test. Takes a few seconds, and tells you if the key press has been detected. Go from there.

Well that was interesting. The RF input detected the key press. As it worked this morning with a new battery, and failed this arvo, I thought it was maybe losing charge through dodgy joint/corrosion.
Could the RF test detect a signal that is too weak to operate the locks? I'll try tomorrow with a fresh battery.
My spare, spare Valeo does not have the engine mobilser chip. Maybe I can swap that chip over.

If the key is detected try to reprogram the fob eventually save it in other slot which is unused cos there are 4 of them beside the one for SLS, there are cases when this helps Nanocom Evolution Key (Plip) Program for a Discovery 2 - YouTube

that chip which is missing in the Rover fobs is only to communicate with the passive remobilisation exciter coil it has nothing to do with lock/unlock functions

This fob has been used since I had the car. Sept 2015. Can it lose its programming?

Originally Posted by Bohica

Can it lose its programming?

Yes it can, i've seen cases hence my advice

Mine has done it more than once, both keys. I have no idea why. You MUST follow the instructions faithfully or you are in for a frustrating time.

Well I'll be a drunk monkeys uncle. The key code is on a sticker on the chip?
I've given the fob a clean with isopropyl alcohol the Q tip got slightly dirty (thanks work)
I'll re program tonight.

Originally Posted by Bohica

Well I'll be a drunk monkeys uncle. The key code is on a sticker on the chip?

Far easier than finding the barcode.
Remember what Fery said, program into a different slot. I don't know why that matters, but it does.