Help Needed Can Not Lock C4

[alto]

Hello this is my first post and hoping someone can help me, just bought a c4 06 reg 5 door it came with one key the blade fits the lock in the front passengers door and will lock it manually ( the only door with a lock on) but only that door locks the central locking is not activated when i lock the passenger door, it also starts the car, my problem is the key is not the fob type (no buttons for central locking etc)

Question 1 should my central locking not be activated when i lock the passenger door manually ?

Question 2 Does this mean there is something wrong with my central locking ?

Question 3 Is there any way i can get a fob type key to work the central locking etc ?

At a push if i could just lock the car securely for now that would help greatly at the moment the only door i can lock is the front passengers. Car is in the garage at the moment but hoping to start using it for work next week,would rather not leave it open all day on a public car park.

Any help or advice would be very much appreciated.

[alto]

No one with any help or advice on this problem pleaseeeeeeeeeeeeeee !!!!!!!!!!!!!!!!!!!

[paul.h]

Welcome to the forum.

 

A Citroen dealer will be able to supply a remote key fob to replace the one that should have been supplied when you bought the car. It could cost over £100 though and will need progamming to the car.

 

On the dash will be a lock button (may have a padlock symbol on it) does this lock the doors to show that the central locking works ?

 

In the handbook it will say how to lock the doors if the central locking is not working and will be something like using the key in a hole at the edge of each door. If you do not have a copy of the handbook these can be read/saved/printed from the service.citroen site but you need to search under service.citroen ddb to find it since Citroen seem to have made it hard to find http://service.citroen.com/ddb/

 

This is copied from the handbook section on Access:

 

　

Manual operation (emergency mode)

In the event of an electrical fault, it is possible to lock the vehicle’s doors by actioning control

 

B on each door.

With the door open, insert the end of a key or similar item into the aperture and turn.

Close the door.

After a repair, normal functioning resumes using either the unlocking control

 

A, the remote control, or the key used in the driver’s door.

[alto]

Welcome to the forum.

 

A Citroen dealer will be able to supply a remote key fob to replace the one that should have been supplied when you bought the car. It could cost over £100 though and will need progamming to the car.

 

On the dash will be a lock button (may have a padlock symbol on it) does this lock the doors to show that the central locking works ?

 

In the handbook it will say how to lock the doors if the central locking is not working and will be something like using the key in a hole at the edge of each door. If you do not have a copy of the handbook these can be read/saved/printed from the service.citroen site but you need to search under service.citroen ddb to find it since Citroen seem to have made it hard to find http://service.citroen.com/ddb/

 

This is copied from the handbook section on Access:

 

　

Manual operation (emergency mode)

In the event of an electrical fault, it is possible to lock the vehicle’s doors by actioning control

 

B on each door.

With the door open, insert the end of a key or similar item into the aperture and turn.

Close the door.

After a repair, normal functioning resumes using either the unlocking control

 

A, the remote control, or the key used in the driver’s door.

Thanks for that,never came with proper key fob salvage car so not much i can do to be honest.

The key i have starts the car (non fob type) so does that mean it as some sort of chip in it and as been programmed to the car ?

If it had not been programmed to the car would the car not start due to immobiliser ?

Seen the fobs on ebay very cheap could i not just buy one of these and program it to work the doors only ? and use the key that came with the car to start it ?

Any more help or advice would be great thanks again.

[alto]

Just pressed the lock on the dash and yes central locking kicks in so i can just open passenger door press the lock then lock passenger door with key so car is secure thanks for that,is there no way i can make central locking kick in when i lock passengers door with key ?

[paul.h]

Many Citroen cars are supplied new with one remote key and one key without the remote. Both have the immobilser chip so they will start the car. You may have an original key and the previous owner has lost the remote one. Since the central locking works from the dash button there is a good chance if you get a remote key it will work the central locking - whether one from ebay can be programmed for your car I do not know but hopefully another member will help with this.

 

You may find locking the doors with the dash button and then opening a door will unlock all of them so trying this and wanting just the passenger door to unlock as mentioned in your last post may not work.

 

This is from page 39 of the handbook (found using the link above) which says using the key in the door lock should work the central locking, so possibly there is a fault such as a broken wire where they go between the passenger door and body.

 

　

Central locking using the key

A brief action with the key locks the vehicle.

Deadlocking: Central locking using the key

A second action straightaway with the key deadlocks the vehicle. It is then impossible to open the doors from either inside or outside the vehicle. A long action with the key closes the windows.

Note:

 

With the vehicle stationary and the engine switched off, locking is signalled by the flashingoftheinteriorlockingcontrolwarninglamp.

If any of the doors, or the boot, is open or not properly closed, central locking does not operate.

Electronic immobiliser

The ELECTRONIC IMMOBILISER device locks the engine supply system.

The system activates automatically as the key is removed from the ignition.

All the vehicle’s keys contain an electronic immobiliser device.

After you switch on the ignition, a dialogue starts between the key and the electronic immobiliser device. The metallic part of the key must be correctly deployed in order to ensure a successful dialogue.

If the key is not recognised, starting is not possible.

If this occurs, leave your vehicle immobilised and contact a CITROËN dealer

[alto]

You have been a great help and thanks for that, just wondering if any other member knows the procedure of syncing the fob to the car ?

Also if i bought a key off ebay or even a second hand (fob type) one would it be possible to sync it to the car so i could use that for the central locking and use the none fob type one which i already have that starts the car ?

[alto]

Just a update to the post.

What i was hoping for help with is i can now use central locking by going to the passenger door open that press the lock symbol on the dash shut the door and lock that with the key.

Then do the opposite to gain entry which would not be to bad if lock was on drivers door.

Firstly is there a way that the key alone can be used to activate and deactivate the central locking without having to press the lock symbol on the dash ?

Better still would it be possible to buy a fob type key from ebay or the likes and sync it to the central locking as i already have a key that is programmed to the car i could use this one too start it and the fob type one just for the central locking ? or again could i split my programmed key (none fob type) and put the inners of that in a fob type key ?

Any help or advice would be very much appreciated. 

[paul.h]

Something you could try to see if there is a problem with the passenger door lock. When using the central locking, if one of the doors is not closed, the central locking will try to lock the doors but then immediately unlock and sound as if the locks are bouncing shut and then open. If you use the dash button to lock the doors but keep the passenger door open, do all the doors try to lock and then unlock ? If not, then there may be a problem with the passenger door lock mechanism (or its wiring). Also try this with different doors open. If the passenger lock proves to be faulty you could try a used one.

 

In the Haynes manual for the C4, it gives the following on page 11.18 to initialise a remote after replacing its battery but I do not know if this will work for a remote from another car so that it would work on your car:

 

'To initialise the unit after renewing the battery, put the key in the ignition and leave it in the off position. Then switch on the ignition (without starting) and immediately press the locking button on the key for 10 seconds. Then switch off the ignition and remove the key from the ignition lock. The key remote should now be fully operational.'

 

In your case you would need to put your non remote key in the ignition switch but use the lock button on the remote. You would probably need to keep the remote away from the ignition switch so its chip does not interfere with the immobilser (the transponder that detects the chip is on the ignition lock barrel).

 

On Citroen keys some have a separate immobiliser chip in the key to the printed circuit board such as our 2003 C3 but on others the chip is part of the PCB. If the C4 has a separate chip then possibly you could remove it from your key and put it in a remote key case in place of one already there. You would also need to see if the key blade can be removed from your key and put in a remote one - on remote ones the blade is held by a roll pin which can be pushed out with the blade part open, the blade swapped and the pin put back.

[paul.h]

Citroen's procedures for adding a new key also require a diagnostic as well as the synchronisation procedure in Haynes for battery replacement.

 

1. Remarks

When adding or replacing a vehicle key, it is necessary to perform the following operations :

• Key programming procedure
• Synchronise the high frequency remote controls

N.B. : The vehicle keys are allocated to a single BSI.

CAUTION : Initialising a new key will require all the keys to be initialised.

2. Diagnostic tools

"LEXIA 4171-T" station.

"PROXIA 4165-T" station.

"LEXIA 3" station.

"PROXIA 3" station.

3. Registering the keys

3.1. Initialisation procedure using the "LEXIA" diagnostic tool

Make the following selections in the diagnostic tool :

• "DIAGNOSIS"
• Select the vehicle
• "GLOBAL TEST"
• "BSI ECU"
• "INITIALISATION"
• "KEY INITIALISATION"

Follow the instructions given in the diagnostic tool.

3.2. Initialisation procedure using the " PROXIA" diagnostic tool

Make the following selections in the diagnostic tool :

• "DIAGNOSIS"
• Select the vehicle
• "GLOBAL TEST"
• "BSI ECU"
• "INITIALISATION"
• "KEY INITIALISATION"

Follow the instructions given in the diagnostic tool.

N.B. : The "PARAMETER MEASURES" menu can be used to check the number of keys initialised . The number of keys initialised indicates the total number of vehicle keys. The number of high frequency remote controls initialised indicates the number of high frequency remote controls synchronised.

4. Synchronise the high frequency remote controls

Perform the following operations :

• 1 - Switch off the ignition and take out the key
• 2 - Wait 1 minute without pressing the buttons of any remote control
• 3 - Place the key of the high frequency remote control to be synchronised in position "ignition+"
• 4 - Within 10 seconds, press the locking button for 5 seconds
• 5 - Switch off the ignition and take out the key
• 6 - Repeat the procedure with the other keys from point N°3, otherwise move on to point N°7
• 7 - Wait 30 seconds, the remote controls are synchronised

Carry out a locking / unlocking test of the vehicle’s doors and tailgate.

N.B. : If the test for locking/unlocking of doors and tailgate is not correct, recommence the synchronisation operations for all the ignition keys that have a high frequency remote control.

[alto]

That sounds about right,sit in the car with all 4 doors shut press lock button on dash it clicks but no doors lock. Get out with 3 doors locked and drivers door open press the lock button on dash again click but no doors lock, 3 doors shut passenger door open click this time central locking kicks in on the 3 shut doors slam the passenger door lock that with key all 4 doors shut.

 

What do you think would you leave it as it is ? don't want to end up with no working key !!!!!!!!!!!!

Can borrow a C4 fob type key, do you think it could do any harm trying my key in the ignition then seeing if the fob will sync to the central locking using the instruction you where kind enough to put up for me ?

If it does sync i am thinking i will at least hear a click then i could go a head and change the faulty passenger door lock mechanism (or its wiring) like you say.

Edited August 23, 2015 by alto

[paul.h]

You could try borrowing a fob key to see if it would work by just initialising it but it may not, otherwise the car security would not be that good. It may need the diagnostic procedure using a Lexia to get it to work and if so a remote off ebay would work. On one of the C5 forum sections there is a pinned topic of members who are able to help others with diagnostics so this is worth checking. I would send a message to coastline taxis to see what he thinks, he works on a lot of Citroens and probably has come across this before but does not visit the forum every day so may have not seen this topic yet.

 

In an ideal world where money was no problem, you would visit a Citroen dealer, get a new remote key and get them to replace the passenger door lock mechanism which I think includes the switch that tells the car if the door is closed or open - hence why I suspect this is not working the central locking when the key is used in the door. If your car indicates if a door is open you may notice the passenger door never shows when it is open.

 

As a minimum I would replace the door lock mechanism after checking the wiring and depending on the response from coastline taxis, look at the remote option from ebay. There are a few different Citroen part nos. for the locks and the 3 door car has different nos. also. To get the right part no. you need to use the parts diagrams with your VIN but it could be 9135FA. The parts diagrams can be seen as a free service if you register as another professional and a member of the Citroen Owners Club, then use your VIN (VIS) top left on the diagrams to find your car. if you look under Bodywork, Front doors and trims you will find the door locks. If you look under Characterisitics it will list the details of your car and it should confirm it has central locking. http://service.citroen.com/do/changerParametres

[alto]

Can not tell you how grateful i am for all the help,think i will first get the door card off have a look at the door lock to see if there are anything fixable there if not replace that if i manage to get central locking fully working on the key i will then think about the fob.

The link you sent me do i just register ? 

[paul.h]

On the link, just register but do it as another professional and a member of the Citroen Owners Club. Car clubs are allowed to use this free service in the terms and conditions. It also lets you pay for things other than looking at the free parts diagrams but I have not used them.