Deadlocks

[davcud69]

My daughters 54 plate c3 has a problem with the deadlocks 

 

3 out of the 5 doors will open the boot opens drivers door opens but now and again you have to wind down the window and put key in the lock from the inside and open the door, the child lock light is on all the time as well ,

 

any ideas please thanks 

 

 

[paul.h]

I am guessing the child lock light is the one to show the front passenger air bag is switched off - if so, this can be switched back on using the key in the switch at the end of the dash seen when the front passenger door is open.

 

For the driver's door lock, check if there is any damage to the wiring between the door and body in the rubber bellows. If not then the door inner trim/card will need removing to access the lock and check its wiring and if the lock actuator is sticking or there is any other problem. Does the dash lock switch work to unlock the driver's door instead of having to lean out of the window to use the key ?

[davcud69]

you cant open any other door apart from drivers door and the boot, the child lock light is on you can hear a clunk when you use the remote but this does not open anything, 

[paul.h]

This might be a problem with the locking ecu which might need replacing or the wiring - a dealer could do a diagnostic check to find this. The problem will need to be solved since to pass the MOT the doors must be able to be opened from the inside. First though I would try a battery disconnection/reconnection since this sometimes can clear odd faults and does not cost anything to try. These are from the C3 Technical section Common Problems pinned topic:

 

11. Sometimes the remote key fob fails to lock or unlock the doors.

May be caused by radio interference from such as a mobile phone, but the key will work and after some time the locking returns to normal if you come back to the car. I have not tried to find a solution to this. There is a pinned note about this. One other owner reported replacing the comms 2000 unit which contains the remote receiver. A C3 Picasso 2010 driver's lock was not working on the remote and using the key in the key hole in the side of the door provided the fix.

 

20. Odd electrical problems caused by wrong battery disconnection procedure.

If you need to disconnect the battery and not do a BSI reset procedure, I have found the following has not given me any problems on a 2004 and 2007 C5 and a 2003 C3:

- remove the ignition key from the car

- open the bonnet

- wait a few minutes for the BSI to shut down

- disconnect the battery negative terminal

 

When reconnecting

- ignition key out of the car

- reconnect the battery

- wait a few minutes

- insert the key in the ignition and wait a minute

- turn the key to the first position and wait a minute

- turn the key so the dash lights come on and wait a minute

- start the engine

- take the windows down and up to reset the anti pinch

- reset the clock (and radio on the C3).

[davcud69]

Tried the reset all still the same :(