How to remove memory from key fob
#1
How to remove memory from key fob
I have a XK8 4.2S 2005 in the UK
Neither of the original key fobs would work unless they were within inches of the rear screen aerial.
I got a new fob today and programmed it to the car using the flasher stalk method.
Now, the new fob works, but the two old ones don't work.
I imagine I made a mistake using all 5 presses up on the new fob.
The question is ... how do I get the other two fobs working ... I imagine I need to cause the new fob to lose it's connection with the car. and then start again using 3, 1, 1 presses
Thank you very much
Ray
Neither of the original key fobs would work unless they were within inches of the rear screen aerial.
I got a new fob today and programmed it to the car using the flasher stalk method.
Now, the new fob works, but the two old ones don't work.
I imagine I made a mistake using all 5 presses up on the new fob.
The question is ... how do I get the other two fobs working ... I imagine I need to cause the new fob to lose it's connection with the car. and then start again using 3, 1, 1 presses
Thank you very much
Ray
#2
Jut re-do the entire procedure, this time be sure to include the old and new fobs in your sequence. There are basically 5 slots, and you have to fill ALL 5. Just like you said, you can do 3, 1, 1, or other combinations. There is no separate step to disconnect a prior fob.
Best of luck, keep us posted.
Best of luck, keep us posted.
#3
Thank you very much,
I thought I had already tried that and only the new fob worked afterwards ... but I will have another go.
I was expecting the new one had to go back to factory setting before I could start again with 3,1,1
Having said that I do realise the two old ones are not factory set as they were tuned to the car until this morning.
When I try again I wonder if I should do the first 3 presses on one of the old fobs then 1&1 on the other two?
Ray
I thought I had already tried that and only the new fob worked afterwards ... but I will have another go.
I was expecting the new one had to go back to factory setting before I could start again with 3,1,1
Having said that I do realise the two old ones are not factory set as they were tuned to the car until this morning.
When I try again I wonder if I should do the first 3 presses on one of the old fobs then 1&1 on the other two?
Ray
#4
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Ray1000 (04-23-2018)
#5
I understand, I was holding the fobs close to the gear selector light and noticed the light came on with each press of the new one but not the old.
Are you saying each successful fob press will cause the led to flash ... and if it didn't you could press again until you have seen 5 flashes spread over three fobs, in my case
I'll have another go shortly and let you know.
Thañk you again for your help
Ray
Are you saying each successful fob press will cause the led to flash ... and if it didn't you could press again until you have seen 5 flashes spread over three fobs, in my case
I'll have another go shortly and let you know.
Thañk you again for your help
Ray
#6
All three are working again now
The key to it was your point that there needs to be a responce from the led for each of the 5 presses.
With my two old fobs only working when inches away from the rear screen aerial I had several failed presses but made sure there were 5 flashes.
Thank you for your help
Ray
The key to it was your point that there needs to be a responce from the led for each of the 5 presses.
With my two old fobs only working when inches away from the rear screen aerial I had several failed presses but made sure there were 5 flashes.
Thank you for your help
Ray
Last edited by Ray1000; 04-23-2018 at 03:31 PM.
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MiragePro (04-24-2018)
#7
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#8
#9
The older cars and the new cars really don't have a significant difference in range. The key to range is: 1 a strong battery in the FOB 2. a good clean antenna connection. Unplug the antenna and scrub the connectors and plug it back in. Also, a new FOB doesn't mean new fresh battery. No telling how long it has sat around waiting for you to buy.
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Ray1000 (04-26-2018)
#11
Good to hear you've got all three remotes programmed.
To describe 'normal' performance, with my 2005 XK8 4.2-S Coupe the remotes would work up to twenty feet away from the vehicle.
Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.
Graham
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Ray1000 (05-01-2018)
#12
Observation: your old fobs only work inches away from the rear screen, but the new fob works at a distance just fine. This suggests the antenna in the rear screen is working just fine. Have you tried to replace the batteries in the old fobs, or doing any of the cleaning procedures folks talk about? The circuit board has to be removed from the plastic shell and cleaned of any rubber residue with alcohol.
#13
^^ Agreed. Cleaning the guts of my original 2005 S-Type key fob with alcohol and a couple of Q-Tips every two or three years usually improves its range of operation again. And a fresh fob battery is usually required every three years or so. Be sure to clean the battery contacts before you insert your new battery....
#14
Thank you Graham, I don't think my new one will work at 20 feet but hopefully cleaning the various contacts will improve it.
fmertz ... thank you for the observation and your continued interest. I happen to have the keys to my neighbours Jaguar XF ... when I put my batteries in his fob I can operate his car from our house. With regard to the cleaning, my fobs all have mechanical switches so I'm not sure if the suggestions re cleaning are referring to a different type.
jon ... does your fob have mechanical switches or ones that rely on the impregnated rubber making an electrical contact?
Ray
fmertz ... thank you for the observation and your continued interest. I happen to have the keys to my neighbours Jaguar XF ... when I put my batteries in his fob I can operate his car from our house. With regard to the cleaning, my fobs all have mechanical switches so I'm not sure if the suggestions re cleaning are referring to a different type.
jon ... does your fob have mechanical switches or ones that rely on the impregnated rubber making an electrical contact?
Ray
#15
#17
My only (original) fob developed the same incurable short-range virus a couple of months ago. Purchased two new fobs from eBay and programmed them both in just a few moments. Range is now excellent (30+ ft). I did reprogram the old fob at the same time. No difference in range (short), but good for a backup if ever needed...
#20
Thank you Andy,
I popped it off and cleaned it generally.
It must have been OK from that point of view because it didn't effect the range the fob.
I did notice it goes "over centre" as it clicks back on and wondered if it were loose in it's normal position ... but I ruled that out by holding it firm onto the stud and had someone test the fob at varying distances ... it made no difference.
Checked to see if it made any difference whether is was plugged on or not ... it did make a difference ... it doesn't work at all when un-plugged.
It is not clear to me where the two contacts are ... the "centre" and the "outer" you would normally expect from an aerial connection.
Is it possible there is a centre spike missing from mine ??? See pictures
Thank you
Ray
Ray
I popped it off and cleaned it generally.
It must have been OK from that point of view because it didn't effect the range the fob.
I did notice it goes "over centre" as it clicks back on and wondered if it were loose in it's normal position ... but I ruled that out by holding it firm onto the stud and had someone test the fob at varying distances ... it made no difference.
Checked to see if it made any difference whether is was plugged on or not ... it did make a difference ... it doesn't work at all when un-plugged.
It is not clear to me where the two contacts are ... the "centre" and the "outer" you would normally expect from an aerial connection.
Is it possible there is a centre spike missing from mine ??? See pictures
Thank you
Ray
Ray
Last edited by Ray1000; 05-01-2018 at 03:25 PM.