Jaguar Repair Questions? Ask a Mechanic for Answers ASAP
Sorry for the extended wait time you've experienced, I've only just come online now and would like to assist you with your question.
I'd suggest to try this re-sync procedure:
1.)I would recommended that you ensure all key fobs are fitted with new batteries. 2.)Get in the car and close the drivers side door. 3.)Put the key into the ignition and turn to position I. 4.)Wait 5 seconds 5.)Turn the key quickly to position II then back to I four times. (do this only once)6.)You should hear a single chime. 7.)Remove the Key 8.)For each Key fob in rapid succession. Press any single button on the key fob you wish to pair, you should hear a chime as each Key fob is paired with the security system. After the chime press a button on the next Key fob you wish to pair. 9.)On compleation after all keys have been programed, wait 3 minutes then check the operation of each Key fob by locking/unlocking the vehicle.Important Note :-All the fobs that you wish to use Must be paired at the same time. Every time you operate the key as in step 5 above the code will be changed, previously programmed fobs will no longer work unless you pair them all at the same time.
OK next try doing a full reset of the car by disconnecting the battery cables and clamping them together for 10 mins. Remove both battery leads from the battery then use a nut and bolt or G-clamp to hold both battery lead terminals together.
This discharges any capacitors / memory within the ECU and around the car so ensures all memory settings are wiped clear - back to the factory default.
This will reset all the systems on the car and you may need the radio security code to get it going again, and ensure that the keys are in your hand when you re-connect the battery as the car may lock and turn on the alarm
then try running through the re-sync procedure again
if this doesn't work then yes the services of the Jaguar service tool is required
any Jag specialist should be able to cope with this as well as the dealers