Transponder codeing

[Fra21r+]

Thanks for the reply Marc

Vin VF7**************[VIN obfuscated, can be read by forum staff]
Citroën relay 2.2 hdi lwb 2002

[GiveMeABreak]

Ok, so now I have your VIN, I can see that you don't have a BSI on this model. I should of asked for this earlier as a lot of what has been posted earlier in the thread is no longer relevant for this model - my fault!

You have a 'Code Unit' that handles the confidential code and authorises starting.

So can you explain what you have on the van now?

1) Do you have the original Code Unit ECU or a Donor unit?
2) Do you have the keys for both these units?

And finally what are you trying to do now? is the vehicle starting?

There is an emergency procedure to start the Van if you have the correct code for the Code Unit ECU, where it is not working.

If you can let me know what the situation is and what you are trying to do I might be able to help further.

[Fra21r+]

Hi Marc
back to its original spec and one key but no transponder,

I have two new transponders to code in

Have vpo and 5 number security code

Van does not start as no transponder present

With the security code I can enter the code through the acc pedal procedure and the van starts

Want to code two transponders to the van

[GiveMeABreak]

Ok, so you know the emergency starting procedure using the accelerator pedal.

As for the Transponder and the remote controls - there are 2 procedures it would seem: One to code the memorise the Transponder and one to memorise the remote control:

Keys with distance remote control
This system permits locking/unlocking of the vehicle from a distance:

• front doors
• Rear doors
• The side sliding door

The signal emitted by the key is received by a radio frequency receiver, installed behind the dashboard.

Synchronisation of the keys with the remote control
Synchronise the remote controls with the radio frequency receiver in the following cases:

• Memorisation of a new key with the remote control in the code control unit
• Replacement of the radiofrequency receiver

N.B.: It is necessary to have the password available (code with 5 characters).

Select in succession the following menus:
"RADIOFREQUENCY RECEIVER"
"PROGRAMMING"
"PROGRAMMING"

N.B.: Do not confuse the "password" used for the memorisation of remote controls, with the electronic code inscribed on the code control unit and used for the memorisation of transponders.

When memorising a new key into the immobiliser unit
It is necessary to carry out the following operations:

• Memorisation of the transponder
• Memorisation of the remote control of the new key of the vehicle

Now in addition, there are 2 separate procedures that you can use to determine:
a) Whether the confidential code in the 'Code Unit' matches the one entered; or
b) Whether the confidential code in the Engine ECU matches the one stored.

Code Unit Code Check:

Stage	Operations to be performed
1	Connect the diagnostic equipment to the vehicle
2	Select "DIAGNOSIS"
3	Enter the type of vehicle then its chassis number
4	Select the "anti-theft" item ; Then validate with "*"
5	Select the "Code Unit" item ; Then validate with "*"
6	Select the "Configuration" item
7	Select the "key reading" item
8	Enter the confidential code (Electronic Code indicated on the customer’s confidential card)
9	The diagnostic tool checks that the code entered corresponds to the code stored in the "Code Unit" ECU
10	2 possibilities: - The diagnostic tool displays the parameters of the key: The code entered is identical to that stored in the "Code Unit" ECU - The diagnostic tool displays "code incorrect" : The code entered is different from that stored in the "Code Unit" ECU

ECU Code Check:

Stage	Operations to be performed
1	Connect the diagnostic equipment to the vehicle
2	Select "DIAGNOSIS"
3	Enter the type of vehicle then its chassis number
4	Select the item "Test by function"
5	Select the item "power train" ; Then validate with "*"
6	Select the injection system ; Then validate with "*"
7	Select the "actuator test" item ; Then validate with "*"
7	Select the "miscellaneous tests" item ; Then validate with "*"
8	Select the "immobiliser" item
9	Enter the confidential code ; Then validate with "*"
10	Try to start
11	2 possibilities: - The engine starts: The code entered is identical to that stored in the engine management ECU - The engine will not start: The code entered is different from that stored in the engine management ECU

[Fra21r+]

Do not confuse the "password" used for the memorisation of remote controls, with the electronic code inscribed on the code control unit and used for the memorisation of transponders

Am I correct in saying the code for the transponder coding Is on the gray control unit below the steering wheel ? For coding the transponder... Rather than the 5 number password

[Fra21r+]

OK... ECU Code Check as discribed above
using the 5 number password ... Vehicle starts

No remote control open/ close fitted to vehicle

[GiveMeABreak]

You answered before I could respond - been putting up another procedure elsewhere - but glad it is all cushty now

[Fra21r+]

But that only bypasses the system doe it not?.. . Ie no transponder coded in key... .. how do I program the new transponders to the ecu.

Sorry for being a pain

From prevois post yesterday

So refit original ecu and relevant parts
Reconect battery
Start laptop in lexia select citroen jumper mk2
Enrer vin
Global test
Code unit Yes Yes(highlight)
Select. Next
Ecu code FIAT.. validation to continue? Fiat
Verifie
Configuration *
Key programming *
Must have key.. continue*
Entry customer code 5 digit code nubers supplied from citroen *

Key code incorect

Enter said code throw acc pedal van starts

[GiveMeABreak]

Oh, I thought for a minute you said it was working when you said it started!

To be honest the system on these is a bit Carlos Fandango, no wonder they upgraded it . I have another load of blurb on it, but I've never had one of these so I can't say from personal experience how you actually get the thing to programme, assuming there is no fault. So do you also have this 'Electronic Code' they refer to?

Anyway, not sure if this is a help or a hinderance, but here is some more info:

Registering the keys
The key identifier must be stored in the immobiliser unit to allow the vehicle to be started. The immobiliser unit can store a maximum of 8 keys.
CAUTION: To store a new key in the immobiliser unit , All keys must be reprogrammed.

The transponder identifier of a lost or stolen key is erased from the immobiliser unit’s memory when the keys still in the customer’s possession are reprogrammed (remote controls for keys with HF remote controls are programmed from the radiofrequency receiver ECU).

Access PARAMETER MEASUREMENTS to ascertain the status of the engine immobiliser (NUMBER OF KEYS AUTHORISED and KEY STATUS).
Use the diagnostic tool.

Select the menu: Configuration.
After validating and to access one of the following procedures:
Reading
Registering the keys
CANCEL ALL KEYS

The tool will ask for the LOGIN or ELECTRONIC CODE on the code card used by the network to be entered.

This code is used to unlock the immobiliser unit and is also used, amongst others, to program keys.
If the user enters an incorrect code during the login procedure three times in succession, the immobiliser unit will be locked for 30 min.

N.B.: The electronic code and the mechanical code are given on the code card.

Purpose of the electronic code:

• To program the keys
• To perform the emergency starting procedure or engine ECU forced unlocking procedure

The electronic code is stored in the immobiliser unit.

Select the menu: Registering the keys.
After validating, the tool asks for the LOGIN or ELECTRONIC CODE to be entered.
If the LOGIN is recognised by the immobiliser unit, follow the procedure on the diagnostic tool below:

Entering the key number to be learnt
To memorise the key: Put the key to be programmed in the ignition on position, Engine stopped

N.B.: The tool displays the number of keys memorised.
If the initialisation procedure fails:

• Refer to the list of error messages
• Press return to go back to the procedure

List of error messages:

Message	Description
Aerial faulty Disconnected	Defective antenna Repair the harness Replace the aerial
Key not valid	Transponder absent or not suitable Key with an unknown identifier Key faulty
Key already programmed	The key in the ignition has already been initialised Press key (*) to validate Initialise a different key
Key cancelled	The identifier of this key has been erased from the list of authorised identifiers to be stored in the immobiliser unit The key can no longer be recognised
Secret code not valid	The key has been programmed with a secret code (1) which is different to the one stored in the immobiliser unit
Programming not possible	The immobiliser unit has detected a fault Initialisation cannot be performed if a fault is present
Maximum number of keys	The maximum number of keys which can be stored in the immobiliser unit is 8
IMMO CODE in FACTORY MODE	The IMMO code is a basic code randomly generated when the transponders are programmed, from which the SECRET CODE and FIXED CODE are obtained

Replacing the immobiliser unit
The network must perform the following operations when replacing the immobiliser unit:
Fit the new immobiliser unit, supplied blank (programmed with the secret code, the fixed code and the electronic code) On the vehicle
Program the identifiers of all keys in the customer’s possession into the immobiliser unit

Reminder: Non memorised or lost keys will be cancelled from the list of authorised identifiers by the immobiliser unit.

Select the menu: Registering the keys.
After validating, the tool then asks for the LOGIN or ELECTRONIC CODE to be entered.
If the LOGIN is recognised by the immobiliser unit, follow the procedure given on the diagnostic tool:
Entering the key number to be learnt

To memorise the key: Put the key to be programmed in the ignition on position , Engine stopped
N.B. : The replacement parts department is able to provide an immobiliser unit with a secret code and fixed code identical to the previous unit . A database accessible to the department allows the details of the engine immobiliser to be ascertained from the vehicle’s chassis number:.
- Fixed code.
- Key identifier (1 to 8).
- Secret code.
- Mechanical code.
- Electronic code.
- Password (programming of HF remote controls).

[Fra21r+]

Thanks Marc
Yeah it started but that's just like the pedal procedure is it not as you are entering the 5 numbered password so it will start but that's not programming the transponder



This secret code where would this be or get?
As the module under the steering wheel on has it dhlfi numbers if different from vro four number and five number password

As this is an real early mk2 (possably mk1 parts fitted) would I be better trying the jumper Mk1 in lexia for coding

[GiveMeABreak]

No, the procedure is exactly for this model as per your VIN (that's why we ask for it). According to the info above it states it should be available from the dealer

[Fra21r+]

The way it reads..
Replacement immobiliser
Unit is is supplied with secret code is it not?

"Replacing the immobiliser unit
The network must perform the following operations when replacing the immobiliser unit:
Fit the new immobiliser unit, supplied blank (programmed with the secret code, the fixed code and the electronic code) On the vehicle

What a pain in the erse this is

[GiveMeABreak]

I know, clear as ditch water!

[Fra21r+]

Thanks Marc
il let you know how I get on.... Or not lol

can always revert back to the doner ecu

[Fra21r+]

OK today's mission

Tried all the above options still no joy... Got right to writing to key... Then... Code incorrect

This is after entering the 5 number password and it telling me "" correct""

feck knows

When to the breakers got another ecu, grey immobiliser module with key code card and chassis number but No key ..... Just to try
From a 2004 relay

Same

It also said Fiat in options

Had enough

Doner Ecu refitted vans going fine as I have one key/transponder

Only problem I do not have chassis number or key code for this Ecu.... so the lexia is no use to read faults even

Thanks for all your help Marc