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Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

Key fob battery change

Just changed the battery in my key fob, now it doesn't seem to work at all.
An ideas ?
I'm sure I read some where there is a sequence after changing your battery.
Any help greatly appreciated from you knowledgeable chaps.

15th Nov 2015 7:21pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey

It is in the owner's handbook.....

See post four.....

http://www.defender2.net/forum/topic37269....+procedure If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

15th Nov 2015 7:37pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Did you take the sticker off the battery? Someone posted on here this week that they changed the battery and missed a sticker that had been put on the bottom to stop young kids eating them

because a sticker would make a difference

Ray
My build thread
http://www.defender2.net/forum/topic17615.html

15th Nov 2015 7:41pm

Laurie

Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897

2005 Defender 90 Td5 XS CSW Bonatti Grey

When my repairer changed the battery in my keyfob he just took it out of range of the vehicle and did a quick swap.
No masonic ritual involved. Worked fine.

15th Nov 2015 8:10pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

TD5s appear to be less irksome with no necessary 'resync' often required? If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

15th Nov 2015 8:12pm

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

Thanks for that K9f.
Problem is I've already just replaced the battery without unlocking the vehicle first.
I've now opened the vehicle with the key but the alarm keeps going off.
I've put the keys in to fire it up & nothing.
Any ideas ?

15th Nov 2015 8:13pm

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

All I've done is quickly change the battery in the house which is away from the vehicle.
Gone out to open it with the fob & it won't open.

15th Nov 2015 8:15pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

immobiliser is probably stopping it from cranking, is red engine light flashing with a line through on the dash

if so the immobiliser locking you out

15th Nov 2015 8:23pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

If you've a spare functional fob, remove the battery from the one you have just replaced, using the spare fob lock and then unlock the vehicle with this and start again? If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

15th Nov 2015 8:24pm

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

Now in the vehicle, put key in & turn it to fire it up & red engine light flashing up.
Baffling me.
All this for a simple, so I thought battery fob change.

15th Nov 2015 8:25pm

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

dorsetsmith wrote:
immobiliser is probably stopping it from cranking, is red engine light flashing with a line through on the dash if so the immobiliser locking you out

That's what is happening now.
Any ideas where to go next ?

15th Nov 2015 8:27pm

K9F

Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

Spare fob if you have one? Alternatively disconnect the main battery with the key fob battery removed, leave it for a few minutes reconnect main battery, insert battery into fob and try 'resync' procedure again. Either way you have nothing to lose as it's immobilised as stated. If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!

Last edited by K9F on 15th Nov 2015 8:31pm. Edited 1 time in total

15th Nov 2015 8:30pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Check battery is in the right way and fully in place, if so replace with old battery and see if the fob works again. Could be a duff battery. Ray
My build thread
http://www.defender2.net/forum/topic17615.html

15th Nov 2015 8:30pm

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

K9F wrote:
Spare fob if you have one? Alternatively disconnect the main battery with the key fob battery removed, leave it for a few minutes reconnect main battery, insert battery into fob and try 'resync' procedure again. Either way you have nothing to lose as it's immobilised as stated.

I'll give it a try.
Thought changing the battery would be simple, obviously not.

15th Nov 2015 8:48pm

Martin 01

Member Since: 13 Feb 2012
Location: East Yorkshire
Posts: 502

All back up & running again now.
Disconnected battery for 10 mins, reconnected it, went through the installation guide & hey ho all done.
I'll remember to read the installation guide next time BEFORE I change it.

Thanks for all your replays guys, greatly appreciated.

15th Nov 2015 9:13pm

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