2006 C3 central locking issues

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

wheeler
Posts: 7003
Joined: 21 Sep 2002, 19:07
x 767

Re: 2006 C3 central locking issues

Post by wheeler »

Orbit Motors wrote: 24 Aug 2023, 10:22 Just to be clear, are you saying that in theory the keys can work (for actual ignition and starting) without the remote recognising the car?
Correct, if its the right type of transponder but wrong frequency type remote the transponder will program but the remote wont.
The remote programs at the same time as the transponder on these so if the keys are programmed then in theory the remote should be programmed.
Online
User avatar
GiveMeABreak
Forum Admin Team
Posts: 38696
Joined: 15 Sep 2015, 19:38
x 6041

Re: 2006 C3 central locking issues

Post by GiveMeABreak »

The process is the same whether via Lexia or Diagbox, but your vehicle will use Lexia being a 2006 model.

So to clarify, there is a transponder chip in either the key handle part (for key only) or a chip in the fob (for remotes). These are the chips that are encoded once when new to work with the vehicle when paired. This part never needs programming again and is used to start the vehicle. The chip is energised by the transponder aerial when the key is inserted into the barrel and the handshaking takes place between the control unit in the steering wheel, the key, the BSI and the Engine ECU.

The other part is relevant to the remote fobs that in addition to the transponder chip, have control circuitry that operates on either ASK or FSK frequencies, which operate the remote locking and other functions assigned to the middle key (if relevant or applicable).

Whenever a new remote or key only is replaced or another remote or key is added to the vehicle, then ALL the keys and fobs must be paired again. The BSI keeps a record of all paired keys. Any not included in the programming sequence will be locked out and will not start the vehicle / perform other functions. This is why Lexia / Diagbox asks how many keys in total are to be programmed and why you must include all of them.
Please Don't PM Me For Technical Help

Marc
Online
User avatar
GiveMeABreak
Forum Admin Team
Posts: 38696
Joined: 15 Sep 2015, 19:38
x 6041

Re: 2006 C3 central locking issues

Post by GiveMeABreak »

Wheeler's and my posts crossed but that's the gist of what I'm saying ^
Please Don't PM Me For Technical Help

Marc
Orbit Motors
Donor 2024
Posts: 119
Joined: 03 Nov 2022, 20:11
x 20

Re: 2006 C3 central locking issues

Post by Orbit Motors »

Might give it another go and wipe / reprogram the existing keys and then synchronise them. Fitting a pair of fresh Panasonic batteries to both of them for peace of mind as well.

Can you remember which menu the key programming is under in Lexia?
Cheers,
Miles

Satisfaction guaranteed or your dent back!
If it just about starts and drives, I'll probably buy it.


1995 Peugeot 306 XLd
2007 Citroën C6 Lignage

2003 Saab 9-5 3.0 V6 TiD
wheeler
Posts: 7003
Joined: 21 Sep 2002, 19:07
x 767

Re: 2006 C3 central locking issues

Post by wheeler »

Go into BSI then learning from memory?
Orbit Motors
Donor 2024
Posts: 119
Joined: 03 Nov 2022, 20:11
x 20

Re: 2006 C3 central locking issues

Post by Orbit Motors »

Managed to find the relevant menu tonight.

Refitted the BSI, reconnected the battery, and reprogrammed both keys to the car.

And it's still the same ](*,)

So I think there are two options left. Either the replacement keys are of the wrong type of frequency as mentioned earlier, or there is a BSI fault somewhere but I find this less likely to be the case, just on instinct.

Beer time, and I'll start fresh tomorrow!
Cheers,
Miles

Satisfaction guaranteed or your dent back!
If it just about starts and drives, I'll probably buy it.


1995 Peugeot 306 XLd
2007 Citroën C6 Lignage

2003 Saab 9-5 3.0 V6 TiD
wheeler
Posts: 7003
Joined: 21 Sep 2002, 19:07
x 767

Re: 2006 C3 central locking issues

Post by wheeler »

I would find someone with a decent frequency checker that can tell you if your fobs are ASK or FSK. Possibly Timpsons maybe?
Whatever they are order a cheap Chinese type thats the opposite & try programming that.
Orbit Motors
Donor 2024
Posts: 119
Joined: 03 Nov 2022, 20:11
x 20

Re: 2006 C3 central locking issues

Post by Orbit Motors »

2 new keys off Amazon today. Both programmed with Lexia, neither of them will synchronise for central locking. Seriously stumped.

Will a VIN confirm for definite whether I should have ASK or FSK?
Cheers,
Miles

Satisfaction guaranteed or your dent back!
If it just about starts and drives, I'll probably buy it.


1995 Peugeot 306 XLd
2007 Citroën C6 Lignage

2003 Saab 9-5 3.0 V6 TiD
User avatar
Paul-R
Donor 2023
Posts: 7082
Joined: 07 May 2009, 16:24
x 1403

Re: 2006 C3 central locking issues

Post by Paul-R »

ASK or FSK? Or one of each? What frequency do they use?

AFAIK a VIN won't show which type. It's more a question of relying on experience with other vehicles of the same age previously. Which is where Wheeler comes in! Or... finding a locksmith with suitable equipment to tell you what each key fob is.
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.

Inside every old person is a young person wondering what the hell happened.

"Trying is the first step towards failure" ~ Homer J Simpson​
wheeler
Posts: 7003
Joined: 21 Sep 2002, 19:07
x 767

Re: 2006 C3 central locking issues

Post by wheeler »

You cant tell directly by VIN & i havent found a way to identify by looking at the boards.
I have said earlier in the thread that i believe this should be ASK.
What type were the ones you bought?
Orbit Motors
Donor 2024
Posts: 119
Joined: 03 Nov 2022, 20:11
x 20

Re: 2006 C3 central locking issues

Post by Orbit Motors »

Both the ones I bought were ASK
Cheers,
Miles

Satisfaction guaranteed or your dent back!
If it just about starts and drives, I'll probably buy it.


1995 Peugeot 306 XLd
2007 Citroën C6 Lignage

2003 Saab 9-5 3.0 V6 TiD
wheeler
Posts: 7003
Joined: 21 Sep 2002, 19:07
x 767

Re: 2006 C3 central locking issues

Post by wheeler »

OK Im sure there is somewhere in live data you can see if the RF info is being recieved. it may be in the switch module at the steering wheel menu (comms unit) as the RF receiver is built into the comms unit. Might be worth looking through the BSI configuration to check that anything relating to central locking or country of use has not been changed, maybe take some screen shots of the configuration so we can have a look & see if anything is amiss.
Orbit Motors
Donor 2024
Posts: 119
Joined: 03 Nov 2022, 20:11
x 20

Re: 2006 C3 central locking issues

Post by Orbit Motors »

wheeler wrote: 26 Aug 2023, 09:06 OK Im sure there is somewhere in live data you can see if the RF info is being recieved. it may be in the switch module at the steering wheel menu (comms unit) as the RF receiver is built into the comms unit. Might be worth looking through the BSI configuration to check that anything relating to central locking or country of use has not been changed, maybe take some screen shots of the configuration so we can have a look & see if anything is amiss.
Good idea, I'll update when I've got back to it! Cheers
Cheers,
Miles

Satisfaction guaranteed or your dent back!
If it just about starts and drives, I'll probably buy it.


1995 Peugeot 306 XLd
2007 Citroën C6 Lignage

2003 Saab 9-5 3.0 V6 TiD
Orbit Motors
Donor 2024
Posts: 119
Joined: 03 Nov 2022, 20:11
x 20

Re: 2006 C3 central locking issues

Post by Orbit Motors »

Also, probably just clutching at straws here but any information is useful I guess.

I've just remembered that this car was an Irish import at some time in its life (info from when I originally did a HPI check), and the RPO number places its date at 9th January 2006, but it wasn't officially registered until a few months later (hence receiving an 06 registration when it eventually arrived in Britain).

Is there a daft possibility of the car having received parts that were manufactured in 2005 before a change in RF frequency type? Or were cars in certain markets produced differently? Like I say, probably nothing, but sometimes life throws oddities like this out there to catch you out!
Cheers,
Miles

Satisfaction guaranteed or your dent back!
If it just about starts and drives, I'll probably buy it.


1995 Peugeot 306 XLd
2007 Citroën C6 Lignage

2003 Saab 9-5 3.0 V6 TiD
wheeler
Posts: 7003
Joined: 21 Sep 2002, 19:07
x 767

Re: 2006 C3 central locking issues

Post by wheeler »

Unlikely an issue, looks like it was NI anyway so would be UK spec. We mostly use 434 MHz in Europe, but some other parts of the world use 315 MHz.
As its never worked since you had it we dont know if someone has been messing around with BSI configurations. Has it had a BSI replacement in the past??
Specifically its not been configured for use in Japan (who use 315MHz) as a separate HF receiver is used in this case.