Emergency Key Access ("EKA") Procedure
(Disarming Alarm & Starting Vehicle when Remote is Lost or Fails)
Overview and Instructions
The EKA procedure is provided as a back-up method of disarming the alarm and re-mobilizing the vehicle if all else fails. It uses a series of locks and unlocks with the key in the driver's door lock cylinder. From owner reports to date, this feature seems to be enabled on 1996 and later models in Europe, but not North America or Australia -- but see below for a generic EKA code procedure that works in North America. Iif you have more information on this please email me).
The manuals are vague and contradictory on when EKA might be necessary -- the shop manual says it is if you lock the vehicle with the remote handset and then you lose the remote or it fails. (This is understandable on models with passive immobilization which cannot be started without the remote, but the manuals are enigmatic on why this could happen on vehicles without passive immobilization). You still need the key part of the remote, or one of the spare mechanical keys supplied in later model years.
According to the manual, if the remote has failed or been lost and you try to open the door with just the mechanical key, the alarm will sound twice. (Of course, this does not make sense because you should be able to get into all models quite satisfactorily with just the mechanical key. Perhaps they are referring to situations when the remote has malfunctioned in a way that upsets the BeCM, or the alarm has been set off for some reason). If you then try to start the car, the message center will display "ENGINE DISABLED PRESS REMOTE OR USE KEY CODE". (This part makes sense on vehicles with passive immobilization, as described above, or perhaps if the alarm has been activated).
Make sure the doors, windows and bonnet/hood are closed, get out and lock the car again with the key. (Note: on 1996 and later models, you have to turn the key to the lock position four times for this step if the remote handset was not used to lock the vehicle). Then turn the key the required number of times according to the following sequence. (At each step the side lamps warning light on the dash will light to show it has recognized the input).
1. To enter the first digit, turn the key the required number of times to the unlock position.
2. To enter the second digit, turn the key the required number of times to the lock position.
3. To enter the third digit, turn the key the required number of times to the unlock position.
4. To enter the fourth digit, turn the key the required number of times to the lock position.
Turn the key to the unlock position to unlock the doors. The alarm will now be partially disarmed; if you try to open the hood the alarm will sound. After five incorrect attempts (3 for 1996 and later models) at this procedure, the BeCM goes into a 10 minute lockout mode (30 minutes for 1996 and later models), during which time the message center displays "KEY CODE LOCKOUT" and further attempts at EKA will not work.
The EKA code is supposed to be on your "security card" but I don't have one for my vehicle and Staffan Tjernstrom, who first alerted us to this information, mentions that getting it probably involves knowing your dealer very well, and maybe a few pints of good beer! Alex Rudd informs me that he has used the EKA method to recover from alarm problems, and that in the UK you can present or fax your owner's log book (or email a photo of it) to a Range Rover dealer to prove ownership, and they will give you the code.
taken from:
Security and Alarm System Operation & Diagnosis on Range Rover 4.0/4.6/P38A
you will have to set all doors and windows first, including sunroof. also
YOU WILL HAVE TO LOCK 4 TIMES BEFORE ENTERING THE SEQUENCE OF YOUR CODE.
you will hear a beep from the alarm if it doent work on the first attempt try the sequence again but unlocking 4 times first!!!
now to get the code, phone your nearest main dealer and tell them you have just changed your battery and you need the EKA code, have your VIN number(it's in the windscreen) ready and also your cars logbook etc. if they don't give it you PM me and i'll send you the number for the place i got mine from. they may want to see the documents but if they are close enough its worth the trip or tell them you are stranded on the motorway or whatever.
hope this helps
Gav