Resetting key fob after Battery change

[Iggy]

I just had to change the battery in the key fob. I was wondering if I can use the nanocom to set it up to work again, or is there another way??
Cheers Iggy

[Charlie]

What model vehicle?

[Iggy]

TD5 Defender

[Charlie]

Too new for me to assist you!

You may have a better chance getting a response in 'Techical Chatter'?

[justinc]

With the Td5 Defender alarm system, it is a Lucas 10AS like the D1 and freelander. (oops, sorry shouldn't say that word in this section:eek:)

The easiest way to re-synchronise is to repeatedly press one of the buttons on the fob until the thing unlocks/ locks. I have found most are set up only as central locking, and can actually be configured as a complete immobiliser etc using Rovacom ar testbook etc.

If it STILL won't work, then it will need re-learning, and this requires the use of Rovacom or Testbook, (I'm not sure whether Nanocom does this?) Both remotes need to be done at the same re-learning session.

The other thing to note, is that the key fobs sometimes break the battery connections on the PCB. Have a look carefully to see if this has happened. This is unusual for so late a vehicle though.

JC

[101RRS]

As Justinc said - repeatedly press each button four or five times. I can also confirm they break the circuit board where the battery connects - can be soldered up though.

And what is wrong with mentioning Freelanders - hmmmm??

[Iggy]

Thanks
I will give this a try. When I initally brought the second fob from a stealer they had to do it with their test book and charged quite a bit for it.
Cheers Iggy

[101RRS]

Thanks
I will give this a try. When I initally brought the second fob from a stealer they had to do it with their test book and charged quite a bit for it.
Cheers Iggy

If the one you have worked on the car before the battery change then pushing the buttons alternatively about five times should work. However if it is a different fob that has not been used on the car before, then it has to be coded to the alarm computer - this can only be done on a nonocom or equivalent.

Garry

[Iggy]

Have checked the battery connections and they seem to be solidly soldered on to the circuit board. Pushed buttons repeatedly and nothing is happening, it is the original key fob that came with the car. When it stopped working I assumed it was only the battery that had died (brought new in 2004), maybe something else is knackered. Any other ideas ????
Cheers Iggy

[LandyAndy]

The D2 has a LED on the key that glows as you press.Has the Defender got the same?,will tell you if the battery is working.
You did put the fresh battery in right way up????
Fresh battery also flat????
I didnt need to reprogram my D2 keys when I swaped the batteries.
Any chance you accidentley "switched off" the alarm system whilst "exploring" Nanocom???
Goodluck
Andrew

[justinc]

If the one you have worked on the car before the battery change then pushing the buttons alternatively about five times should work. However if it is a different fob that has not been used on the car before, then it has to be coded to the alarm computer - this can only be done on a nonocom or equivalent.

Garry

What Garry said is true, in 'PLIP learn' mode, BOTH alarm fobs need to be coded at the same session, otherwise the one that may have been originally working will not be coded anymore.

Take it back to the dealer that coded in the other one for you, and get them to do BOTH at the same time. They shouldn't charge you again as this is how it is meant to be done.

JC

[rapserv]

Thanks
I will give this a try. When I initally brought the second fob from a stealer they had to do it with their test book and charged quite a bit for it.
Cheers Iggy

that's WHY they are called 'stealers'!!

[DiscoMick]

If a battery box was plugged into the cigarette lighter before the battery was disconnected, would the current be maintained and the key fobs not need resetting?

[Parker]

If the one you have worked on the car before the battery change then pushing the buttons alternatively about five times should work. However if it is a different fob that has not been used on the car before, then it has to be coded to the alarm computer - this can only be done on a nonocom or equivalent.

Garry

So if I understand right:
1.open car with key fob that works
2.replace battery in key fob
3.repeatedly press buttons to do 'magic reset of key fob brain'?

That is it?

Another question: My key fob works only if I am really close, say max 2m and not even if standing right behind at the rear door. Is that normal? It's really a nuisance at times. Where is the antenna in the defender?

Thanks!

[DiscoMick]

I could be wrong, but maybe if you go way out of range of the vehicle and then change the battery, would it still work when you come back in range of the vehicle?
That worked on our 2009 Defender.

[sashadidi]

I could be wrong, but maybe if you go way out of range of the vehicle and then change the battery, would it still work when you come back in range of the vehicle?
That worked on our 2009 Defender.
+1 our LR independent did that for mt 3 keys all worked perfectly the last two times I have it on 2008 puma

[POD]

Another question: My key fob works only if I am really close, say max 2m and not even if standing right behind at the rear door. Is that normal? It's really a nuisance at times. Where is the antenna in the defender?

Thanks!

Yes that is sadly normal. There was a thread on here a few years ago- I'm sure a search would find it- on extending the antenna wire to get better range. I did that with disappointing results, still have to be almost leaning on the car most of the time for the fob to work.

[DiscoMick]

From memory the antenna is behind the fuse box under the steering wheel.