How to resync a Jaguar XJ8 key fob

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Resyncs for XJ8 and similar aged, METHOD 1 - most likely to work.

1) Unlock car and get in, leaving drivers door open.
2) Pull headlight flasher back and insert key while holding.
3) While still holding headlight flasher, turn key to position II.
4) Release headlamp flasher and then flash headlights four more times.
5) The red lamp on the gear selecter will illuminate (no sound).
6) Press a button on each fob to program (gear selecter lamp will flash for each fob press).
7) Now make sure they work.


1) Key in ignition without turning to any position.
2) Hold turn signal stalk in the flash to pass position, pulled towards you.
3) Turn key one position while holding the stalk.
4) Flash the stalk 4 or 5 times and you should hear a confirmation tone from the security sounder. It is not the horn, and in an area with high outside noise levels you may not be able to hear it, it is rather quiet.
5) After the tone press any button on the remote you wish to program and you will either hear a similar tone confirming programming or a different sounding error tone meaning that the programming did not work.
6) If you did not get the initial tone confirming programming mode there could be either a problem with the security module or a problem with the procedure.
7) The flashes after turning the key require a certain amount of feel. Very rapid or very slow flashing will not work. The 4 or 5 flashes should take a second or two not rapid fire.


Note: All remote transmitters belonging to the vehicle being serviced must be available. If the learning process is carried out without having all transmitters present, all previous transmitter codes will be overwritten, rendering the missing transmitters inoperable.
1) Insert key in ignition, leave in the OFF position.
2) Hold headlight flasher back.
3) Turn ignition key position to 1.
4) Flash headlights 4 times. Alarm will enter programming mode. This will be confirmed by " Beeps", from the alarm and flashing LED on gearshift. Programm each transmitter ( UP TO 5 ) by pressing the lock or unlock button on each transmitter once. The alarm will " Honk " when you press the transmitter button. The alarm must honk 5 times to complete the programming. Therefore, if you are only programming one transmitter you should operate the transmitter 5 times. If you are programming two {2} transmitters you will operate one {1} transmitter twice, and three times on the other. For five {5} transmitters you will operate each transmitter once.
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