Central Locking will lock but not unlock

[Shoa]

My mother has a 206cc 2005 and it has a strange problem which I think is down to the BSI CL relay.
The car will lock on the key and the lights flash and the buttons go down.
When trying to unlock nothing no click but lights flash button does not pop up.
The strange thing is though if its locked when your in the car and pull the button up and pull the open lever it will not open you have to open the window and use the key on the out side of the car, which is a very bad for safety if you need to get out in a rush.

I think the relay in the BSI has gone, I checked the wires with multimeter to see which gets a signal but the purple and the green/yellow wires do not seem to get much more than 10 - 15 Mv when the open button is pressed.

I am guessing these or one of these are the open signal for the lock.
I put my hand on the BSI wiring that goes in to it and you can feel the click for the relay on close but nothing on open.

So my question is has anyone replaced the relay for the CL in one of these BSI units before ?
I am good with replacing relays and soldering SMD electronics on boards that's no problem, it's more the taking out the BSI and making sure its not going to destroy itself from the other threads about disconnecting the battery.

Any info or input would be great, I cannot say if its the relay till I get it out an test it, it might be another part of the BSI that burnt or corroded stopping the relay working but will see once I get the BSI out.

[GrandadMonkey]

Peugeot 206 door actuators are notorious for failing. You probably need a new one if the solenoid is only working one way.

But see this thread too http://www.peugeot206cc.co.uk/viewtopic.php?t=12799&f=1

[Shoa]

But from what your saying its nothing to do with power, but all three do not unlock usually if its the lock they pop up and open not keep them closed.

Then why is there no power signal for the locking on the Green yellow wire and the purple ?
should be 2volts I think to make work but just 10 millivolts when open lock pressed will take the other side off see if that's causing a problem between them but there are only 2 doors on this.

[Shoa]

I see no one on this forum has any electrical background.

[gazza82]

Try asking on 206info.co.uk forum ... Unless one of us has experienced this it's unlikely we would have an answer. Because we are CC owners our numbers are smaller than the generic 206 forums.

[Slo]

I see no one on this forum has any electrical background.

When you say you are locking the car with the key do you mean pressing the fob button(s) or physically inserting the key into a lock and turning it?

If you can't open the door from the inside when its been locked with the remote its because you are pressing the remote fob once to lock and twice (not to open) to deadlock, its the only reason the door wont open after locking its deadlocked! (unless it really is knackered)

Check for broken wires in the rubber conduit between door and 'A' pillar

[Shoa]

Thanks will check the wires I did check the wires on the drivers side but not passenger.
but both get no close 2 - 3.5 volt signal on the wires both sides on the purple and green and yellow .
has 4v on the green.
It clearly gets a 2 - 3.5v signal to close on the pink and blue, with the white having 4v.

Yes I press the fob button once I am not sure if it has deadlocks on the car I do not press it twice I can see & hear it's locked why try and lock it again.
If the button inside is pressed the doors will not open with the handle on inside.
It's a real pain that the BSI is so fragile in these car's pugs are renowned for there bad electrical systems.

I press once to close once to open as the indicators flash to tell me this.
but Its strange both sides have no signal and there is no click from the relay to open with out the click meaning its not closing the loop to give a signal it will never open, that's why I say its the BSI board or relay on it.

[Shoa]

Try asking on 206info.**.** forum ... Unless one of us has experienced this it's unlikely we would have an answer. Because we are CC owners our numbers are smaller than the generic 206 forums.

I have asked on another forum its very hard with electrics on cars they are such a pain nowadays to many computers and sensors its one of those problems that's needs either a main dealer or an auto electrician, I am an ex mechanic on VW from years ago, so know about engines but electrical systems are always a pain to diagnose.

[Shoa]

I have had another look and put it back together the doors now open when inside so that part is ok now do not know why they open now and not before as I did not take any of the mechanism apart just the wires off.
The wires are all ok have continuity and 0.3 - 0.5 ohms.
Still the problem with the relay from the key I did notice that the relay clicks if I sit in the car and press the dash lock unlock but not from the key fob.
But even with the dash button the relay does not send voltage signal to the door lock.
When resetting the BSI do you have to set the keys up again ?

Tried pressing the lock button twice does not do anything.

[Slo]

Bsi reset wont affect keys or immobiliser programming no. Do you have the 2 button remote or a 1 button remote?

[Shoa]

thanks
I have a 2 button remote.
I have tried both sets of keys does same thing.

[Slo]

So you press the wide button to lock and the small round one to open right?

[Shoa]

Yes that's correct.
I was hoping someone had the workshop manual that could look at the voltage for the open signal and on the wires its supposed to be.
its 99% the BSI not sending signal 1% key fob problem with the button inside the car not doing anything either makes me think its nothing to do with the key fob, that and the fact no voltage to the lock.

[Slo]

When you lock the car, if you press lock again the locks should deadlock but without any indicator notification

[Shoa]

I will have to take it apart again, maybe I have widened the sockets on the connecter with the mm probes so they might not touch now.
Its a pain they fill the connecter with resin on the backs so cannot put probes there.
But for the moment at least you can get out the car normally and not look like a prat with the window down trying to open the door with the key.