The central locking works manualy with no problems, but i wanted to get it to work remotely. I brought a new battery for the key fob and still the central locking did not work. I  decided to follow some advice id seen while browsing the internet. Hey , Since I ran the battery flat last week the remote fob wont unlock/lock the doors/boot. It cant be the fobs batteries as I have two and neither work. Ive tried having the key in ignition whilst pressing the button to 'reset' it but that doesnt work either! Im having a problem with the Xsaras Central locking, this video is uploaded mainly to discuss the issue on the forum, but if you know whats wrong and how to
All the wires to the tailgate go through the rubber tube so possibly a few of them have broken or maybe just the earth wire. This is from the C4 Technical section Common Problems pinned topic and it may be worth contacting your Citroen dealer in case they may do the repair free of charge: 13. Tailgate electrical faults - rear wiper, lock.
1.1-test the opening of the doors of the skoda fabia with the key. First try the central locking. To do this press the key of your car. Observe if the malfunction is general. That is, do you have a single door stuck or several. If this is verified then there is a good chance that the dysfunction comes from the centralization. Let's see how the hood of the C4 is unlocked. We pull the lever located at the bottom left of the dashboard, then, slightly raise the engine hood and unlock the hood with the lever. Once the engine hood is unlocked, lift it up and secure it with the locking rod. To close the hood, we remove the safety rod and drop the hood down from a minimum WBaZiU. 306 11 38 40 95 383 393 55 44

citroen c4 picasso central locking problems