Hi:


My mechanic replaced a sensor in my 2004 Vanden Plas, now the key fob doesn't unlock the door. I am looking through the doc "Unlocking the secrets behind the Jaguar Key Fob" in this forum, but I'm just wondering what you think.


I called the mechanic and he said to check the battery in the fob, but that seems too coincidental.


Is this something that happens, the key gets deprogrammed because they they disconnected the battery or something?


Do you think I need to pair the key like in this video?

You Tube

Thanks.

 

I programmed two remotes (I only got one with the car) I purchased off of ebay using the instructions at the end of attachment to the first post in this thread.

https://www.jaguarforums.com/forum/x...now-faq-87749/

 

Thank you for that, so if I understand that correctly, there is a second fob that I need to get this to work? I will look for that second fob, hopefully it is around.

 

Which sensor was replaced?

 

I think it was the mass airflow sensor.

 

You need two keys to program new keys. A single FOB can be programmed to work (however other FOBs would then no longer work). So if you program your FOB, only that FOB will work. If you find your other FOB you will need to program both FOBs at the same time to get both to work.

 

My biggest worry is that if I don't have the other fob then I wouldn't be able to program the one I had. I talked to the dealer and he said they had to program it with their computer and sometimes you need the other fob just to do that. So it would cost $120 to reprogram the key fob and if I don't have the other one and they need it, that would be another $350!

 

If you are only programming the FOB you do not need both and you can do it yourself.

If you are reprogramming keys then you need both to do it yourself.

 

Okay, that's good to know. I am just programming the fob. The Dealer said that they need to use a special computer to reprogram it. Is that not true?

 

I'll cut and paste from the attachment from Post#2 of this thread:

Lower portion of Key Fob programming of the four button remote portion.
NOTE: When carrying out steps 4 to 6 below, all current transmitters will be erased from memory. Ensure all transmitters to be programmed are available before proceeding.

NOTE: If at any stage two chirps are emitted, then an error has occurred, if this is the case, the process has to be repeated from step 1. When carrying out steps 1 to 7, ensure no other transmitters are operated within range of the system (which should not happen if you have all of the key fobs with you in the car and no one else is playing with them).
1. Open driver door (door must be open throughout the programming process).
2. Pull directional indicator stalk to headlight flash position and hold.
3. Insert ignition key and turn to auxiliary position (position I, first click), then release the directional indicator
Stalk right away.
4. Within 4 seconds start to flash headlights five times by pulling/releasing the stalk repeatedly; at the
fourth/fifth time you hear a chirp from the sounder and the PATS Red LED security dome will flash once).
At this point all transmitters will be erased from the cars system.
The next step will program all of your push button remotes to your car.
5. NOTE: Up to five transmitters can be programmed. Now simply push the transmitter button (any
of the four buttons) on the remote that is in the ignition, and then within 5 seconds push any of the
four buttons on the next transmitter, etc. For each transmitter you do, it will be acknowledge by a chirp
from sounder, and the PATS LED will flash once (Do not repeat the complete sequence if you make
a mistake mid way as the first transmitter will be erased if you do).
6. Turn 'OFF' the ignition and remove the key, (acknowledge chirp from sounder, and the PATS LED will
flash once).
7. Close driver door. Now check each transmitter’s functions on each of the four buttons on each of your Fobs.
All should be working just fine. If not try again from step 1. It may take two try’s to get it correct as the
procedure is all about the speed, timing and doing it smoothly.


The PATS LED is the security dome in the middle of the dash, right up near the front window. If you make a mistake during the process, simply start all over from the beginning.

If your car has all audible alarms disabled (as mine does) you won't get the chirps, you just have to follow the LED flashing. You must flash quickly, then hit a button on one remote, then the other, then turn off the key. I would say it should take 5 seconds or less after releasing the stalk.

 

+1

You must flash quickly to get it to work.

 

That worked! For a minute there I thought I was on a snipe hunt

I had tried it before but didn't get it to work. The key (no pun intended) was to do it exactly as you said. Open the door then pull the indicator stalk back, hold and then put the key in, turn to first position and release the indicator stalk. Then Flash the headlights five times. Finally I heard the chirp that I couldn't get before. Thanks so much for this.

I can't believe the dealer didn't know about this. Seems strange that he wanted me to pay, perhaps $500. But like he said, "That's how we getcha."

Thanks again!!!