Lexia 3 and key programming

This is the place for all your Diagnostic related questions or advice.

Moderator: RichardW

Post Reply
fastjet
(Donor 2020)
Posts: 112
Joined: 11 Apr 2018, 15:07
Location: Lincolnshire
My Cars: Citroen C5 mk1
x 8

Lexia 3 and key programming

Post by fastjet »

Hi, could I ask for some help please on how to program key fobs using Lexia 3.
If I get a key cut from Citroen, how difficult is it to do?
Are there any instructs on the forum on how to do the programming?
Thanks
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: Lexia 3 and key programming

Post by GiveMeABreak »

You will need to get your confidential code for the car from Citroen if you don’t have the card with the code on it. lexia will ask for this when programming.

You must ensure you programme ALL the fobs you have in the same session and tell Lexia how many you are doing in the session. Any fobs not included will be deactivated.

The instructions are contained within Lexia when you get to the relevant menu for key programming.
Please Don't PM Me For Technical Help

Marc
fastjet
(Donor 2020)
Posts: 112
Joined: 11 Apr 2018, 15:07
Location: Lincolnshire
My Cars: Citroen C5 mk1
x 8

Re: Lexia 3 and key programming

Post by fastjet »

Hi Marc, thanks for the reply.
I have the trans code from Citroen, but I am a little worried that I might really screw things up and end up with a none starting car. Can that happen?
For example if Citroen have given me the wrong trans code.
Thanks
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: Lexia 3 and key programming

Post by GiveMeABreak »

No the code is allocated to your specific car and verified by VIN from their confidential database. Lexia will not allow you to proceed if the code is not correct in any case as it compares the code to that encrypted and stored in the BSI.

Just make sure you allow time to do it and follow the instructions exactly. :-D
Please Don't PM Me For Technical Help

Marc
wheeler
Posts: 6848
Joined: 21 Sep 2002, 19:07
Location: United Kingdom
My Cars:
x 717

Re: Lexia 3 and key programming

Post by wheeler »

Don't worry about the code, if the code you have is wrong Lexia will tell you it is incorrect & wont let you go any further.
Its pretty hard to go wrong, you just follow the on screen instructions, if you do something wrong you can just go back & repeat the process again.
One thing to be aware of is some of the immobiliser systems need Lexia to be disconnected after the procedure before the car will start so don't panic if it comes up with immobiliser fault & wont immediately start.
fastjet
(Donor 2020)
Posts: 112
Joined: 11 Apr 2018, 15:07
Location: Lincolnshire
My Cars: Citroen C5 mk1
x 8

Re: Lexia 3 and key programming

Post by fastjet »

Thank you for your advice.
fastjet
(Donor 2020)
Posts: 112
Joined: 11 Apr 2018, 15:07
Location: Lincolnshire
My Cars: Citroen C5 mk1
x 8

Re: Lexia 3 and key programming

Post by fastjet »

I programmed my new key and the original key today and the job went very well.
Thanks for the advice. :-D
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: Lexia 3 and key programming

Post by GiveMeABreak »

No problem👍
Please Don't PM Me For Technical Help

Marc
User avatar
Cutac
Posts: 348
Joined: 28 Aug 2016, 19:36
Location: Croatia
My Cars: 2011 B7 Citroen C4 1.4 VTi
2006 Citroen C4 2.0 VTS
x 20

Re: Lexia 3 and key programming

Post by Cutac »

I've got a question about keys.
My two button key(c4 2011., B7) won't raise or lower car's windows, but 3 button key will.
Three button key allows me to raise or lower them to any position, and I suppose it's a hardware difference, but can two button key be set to at least raise them fully?
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: Lexia 3 and key programming

Post by GiveMeABreak »

Answer - No, unless the function is programmed there already.

The electronics inside the fob and the BSI on the car determine the functions. The 2 button fobs generally have 3 functions:
Unlock Button: Unlock the car
Lock Button: One press: Lock the car; Second press, Deadlock the car. Pressing and holding the lock button will close any open windows / sunroof.

The only functions that are programmable are done in the BSI at factory - in the example of C5 (X7) - where the 3 button fob on the Tourer (estate) will open and raise the tailgate, but on the Saloon, will activate the Headlamps.

So in the case of the 2 button version on your Picasso, try it and see - press and hold until the windows start to close.
Please Don't PM Me For Technical Help

Marc
User avatar
Cutac
Posts: 348
Joined: 28 Aug 2016, 19:36
Location: Croatia
My Cars: 2011 B7 Citroen C4 1.4 VTi
2006 Citroen C4 2.0 VTS
x 20

Re: Lexia 3 and key programming

Post by Cutac »

It's not a Picasso, it's a hatch. :)

Windows don't lower or raise with two button key, but do with three button.
Weird, if two button key should raise windows.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: Lexia 3 and key programming

Post by GiveMeABreak »

Ok, it's a different function then - and not something you can do with the 2 button one as the electronics are not there inside this one that are in the 3 button version.

On the C5 X7, the window opening function from the MK I C5 was removed along with the auto closing of the windows when raining! On the MK I C5 you could have 3 options, open window a little, then a little more, then the next press would close altogether.

They have obviously brought that back and enhanced the function on the later C4 model, but you still need to use the 3 button fob to do it. :-D
Please Don't PM Me For Technical Help

Marc
User avatar
Cutac
Posts: 348
Joined: 28 Aug 2016, 19:36
Location: Croatia
My Cars: 2011 B7 Citroen C4 1.4 VTi
2006 Citroen C4 2.0 VTS
x 20

Re: Lexia 3 and key programming

Post by Cutac »

Yeah, it's a shame when they remove an useful feature.

Since I'd like one more key which can operate the windows, would an Aliexpress key be adequate?
User avatar
GiveMeABreak
Forum Admin Team
Posts: 37005
Joined: 15 Sep 2015, 19:38
Location: West Wales
My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow
x 5646

Re: Lexia 3 and key programming

Post by GiveMeABreak »

I doubt very much that those keys will contain anything but the shell and probably not the correct electronics needed. Just order another one from Citroen if you really want another 3 fob one that will work and then just programme all the keys to your car.
Please Don't PM Me For Technical Help

Marc
User avatar
Cutac
Posts: 348
Joined: 28 Aug 2016, 19:36
Location: Croatia
My Cars: 2011 B7 Citroen C4 1.4 VTi
2006 Citroen C4 2.0 VTS
x 20

Re: Lexia 3 and key programming

Post by Cutac »

Aren't dealer's keys much, much more expensive?
Post Reply