Remote central locking working intermittently

[Hell Razor5543]

I did have a similar issue with a 54 Picasso, and it was down to the crystal in the keyfob. The problem was getting hold of a replacement crystal of the right size and frequency. IIRC it was something like these;

http://www.ebay.co.uk/itm/Pack-of-10-Se ... 232734a776" onclick="window.open(this.href);return false;

but you have to be good with a soldering iron to replace it, as it is surface mounted.

[Hell Razor5543]

The biggest problem you have is that it is an intermittent fault (and EVERY engineer of any type hates those!). Just because my problem was due to the crystal does not guarantee that you have the same fault. If you have a second key, I would check to see if it works reliably.

Before you get those crystals, make sure they are the right ones. I am going from memory, and it was several years ago.

[davegtr]

i had the same problem with my remote on my C8, all i did to cure it was do a full bsi reset, info below, hope it fix's issue for you.

Put the driver's window down, lift the bonnet and ensure all equipment is switched off.
Ensure all doors are closed and remove key from the ignition.
Wait for 3 minutes, disconnect the vehicle battery and wait 15 seconds.
Reconnect the vehicle battery, wait a further 10 seconds (do not open doors.).
Switch on the side lights through the driver's window.
Switch on the ignition and check system's functionality.
Hold lock button on key down for 10 seconds.
Remove key open & close door test central locking system.
Start the engine and complete the system's check.

[citronut]

i would check firstly the connection of the fob/plip battery, then the PCB for bad solder joints, before replacing anything