Immobiliser fob not working

Have just bought a Defender 110 and was given 2 alarm/immobiliser fobs. One is isn't working. Have tried changing the battery but it still isn't working. Any suggestions? Thanks

nickking25 said:

Have just bought a Defender 110 and was given 2 alarm/immobiliser fobs. One is isn't working. Have tried changing the battery but it still isn't working. Any suggestions? Thanks

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What year is the 110. Is it fitted with a genuine alarm/immob? Did you fit the correct battery the correct way around? Did you remove, fit and re-synch the fob as per Landrovers destructions?

its a 2001. yes replaced battery, left old battery out, tried stuff as instructions. any other ideas?

Is the second fob coded to the ECU/Alarm ?

Not sure if second fob is coded. I noted the instructions in the handbook about that i.e. using the ignition key. Is that the right thing to do? Will it affect the fob that is working in any way?

anybody else curious as about this 'junior member' whos name is effectively nicking, asking questions about immobilisers??

nickking25 said:

its a 2001. yes replaced battery, left old battery out, tried stuff as instructions. any other ideas?

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What instructions did you follow?

You don't simply remove the old battery and then stick in a new battery. You need to discharge the plip and then re-synch it after fitting the new battery. You did do this?

If you did it sounds like you first need to find out if the plip is giving out a signal when the buttons are pressed and then that the plip is programmed/coded to the vehicle.

I'm slightly baffled by something you said though.....

I noted the instructions in the handbook about that i.e. using the ignition key. Is that the right thing to do?

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Surely you'd still want to use the ignition key in the ignition even after unloccking the vehicle with the remote?

Hi. Haven't done anything yet about re-psynching the plip. Just saw the instructions in the handbook about re-psynching the fob but wasn't sure how to go about that. Any advice appreciated. Thanks

nickking25 said:

Hi. Haven't done anything yet about re-psynching the plip. Just saw the instructions in the handbook about re-psynching the fob but wasn't sure how to go about that. Any advice appreciated. Thanks

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Remove duff battery from plip (fob)
Hold down both buttons on plip and count to 10
fit new battery
Press lock button 5 times
It should then recognise itself