Central locking

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My Name: Giles123

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Posts: 1
Joined: Thu Oct 27, 2016 12:23 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4
Fuel Type: Diesel
Mileage: 100000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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I have had to replace my driverside door lock with a secondhand one with a key to work it of course, so I know have a key for the ignition and a key for the door lock, unfortunately the new door lock when locked only locks driverside door and none of the others, how do I get the central locking to work again?, can I just swap the microchips over into the new key?
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My Name: Missing Lincs

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Posts: 844
Joined: Mon Mar 05, 2012 9:29 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.1
Fuel Type: Petrol
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Location: United Kingdom
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Hello Giles123

It always seems rather an omission to me but the door key doesn't operate the central locking. How yours is now is normal.

Unless you old set-up was something special, the central locking would be operated from the remote buttons on the body of the key.

If you get a brand new, genuine key body, complete with the remote PCB you could put this on your door key blade and program it to the car's central locking. Would you need to do this though? You'll still need to carry the old key for the ignition.
If at first you don't succeed, destroy all the evidence and pretend you never tried :lol:
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My Name: Arfur Dent

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Posts: 3520
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Giles123 wrote:can I just swap the microchips over into the new key?
The ignition key MUST have the little black 'Crypto' chip marked PCF7936AS if you swap things around. If its not present, the engine won't start.

Image

The remote PCB that Missing Lincs mentions could be in either fob and will work equally well as a remote lock/unlock in either and with or without the PCF7936AS.
Missing Lincs wrote:You'll still need to carry the old key for the ignition
Yes, still 2 keys.
Missing Lincs wrote:It always seems rather an omission to me but the door key doesn't operate the central locking. How yours is now is normal.
Yes, the car seems to be almost totally reliant on remote locking.
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