Central Locking Not Working On 1 Fob But Ok On The Other

[Fraz-ktf]

Well, this "Joining the Galaxy family" is proving frought with fun!

 

My 2005 130 Tdi came with 2 x remote key fobs.  Both will start the car just fine but only one will unlock it remotely.  The "Duff" one has the red light that comes on when you press a button and I've swapped round the batteries, so I'm stumped as to the issue.

 

A friend of mine has 3 x keys for his 2005 Galaxy and he said that if I can get one of his fobs to code to my car, I can have one (Woo, hoo, the luck just keeps rollin' in)

 

Can a fob that's already coded to one car, be re-coded to another (Obviously, the blade part will be swapped too) and if so, do I have to "Wipe" the code first before re-coding?

 

How would I go about all this, if it is indeed possible to do please?

 

Thanks

[gregers]

have you followed the instructions in the faqs on reprogramming the key to the central locking system of the car?

[Fraz-ktf]

Nope, I've read it but couldn't see the answer.  I don't want to wipe or disable any keys as I have only 2 and I believe you need 2 keys to re-program. 

 

I didn't know if I could just swap over the blade section from my "Duff" remote and put it onto the "Button bit" from the other car and then do the reprogramming - would this work?

 

or are you suggesting to try and re-program my own "Duff" key?

[SilverBeast]

This is for a MKII. 

 

WARNING:- If you haven't done so already Search for PATS chip and familiarise yourself with the bits inside the key. There is a tiny plastic block in each key (the Passive Anti Theft System [immobiliser to you and me] chip).  If you take the key apart do it on a clear table over white paper (A3 preferred) so you can see all the bits.  Fundamentally the key has 3 parts:-

 (i) Blade section - that you stick into the ignition/door and turn!

 (ii) PATS chip tiny plastic block - should be clipped int blade section but often falls out when batteries are changed or keys fall aprt!

 (iii) Alarm/Central locking two button fob that clips onto blade section and holds the PATS chip in place.

 

First check the Frequencies on the side of the fob's match, if they don't then that is why they are not working, and they never both will.

 

You have to program keys as a set for the Alarm/Central Locking.  Starting the process will clear all the keys and they should then all be "added" back. Instructions are ion the site somewhere, and in your handbook if you have one. Worst case you can't add them back and have to use the key in the door to open.  This will turn alarm off and operate the central locking. You can still use the car.  You will have to do this either to add the "new" fob or add your original.

 

Immobiliser is a separate operation that uses the PATS chip above.  If you have two working keys you can add a more,  Again instructions are in the handbook.  You shouldn't need to do this.

 

Suggest you:-

(i) Find/go through the programming procedure for the remote and try and add your original remotes (these do fail over time apparently, though both of my originals are still working).  Make sure you know which one worked originally so you can tell if you managed to add the "faulty" one then messed up process, or just re-added the original "working" key.  It is a bit fiddly but worth doing.

(ii) If one doesn't bring working key back to life.  Try again but adding "new" fob, before you take the key apart - saves fiddling if it's not going to work - It doesn't actually have to be on the key to do this.  If it works the swap the blades and PATS chips (see above warning) the check keys still start their respective cars.

[Fraz-ktf]

^{Mr Beast, thank you for holding my hand through this procedure.} 

 

^{After 4 attempts of coding and re-coding, I finally sweated my way to having the 2 "Original" remotes fully functional.}

 

^{You are indeed a star}

 

^{Oh, how I love this forum}

[SilverBeast]

Glad to have helped.  These are problems, I've picked all these things up from this and other Forums.  I tend to read them every day just to keep up with things and know what to expect next!