Our central lockings buggered up too. Weve replaced the selonoid on the passenger has that was gone and now it seems to lock but the passenger and rear doors still wont open.Cant even open it maunually due to child locks. The drivers side and the boot has had no problems at all.Any how this is what we are going to try next as weve ben told it may be due to the module. Thats gonna cost us 80 quid just to diagnost it wish i never had central locking
Central Locking Test Function:
1. Open any door, keys out of ignition
2. Press the switch in the door frame part of the lock (the one that controls the interior light etc.) 6 times within 4 seconds THIS IS THE SMALL BLACK BOX NEXT TO THE METAL BAR ON THE CAR FRAME WHICH THE DOOR LATCH ATTACHS TO WHEN THE DOOR IS SHUT
The result is a car that (until left alone for a minute) will flash both indicator lights each time any door or the boot is opened and it should also flash if you press any key on the remote.
If this doesnt happen with all doors, it could be a faulty switch or loom.
If it doesnt happen with the remote, it could be a faulty remote.
This function also reboots the central locking module, so it could cure the problem