clunysouth

just bought a 2002 celica and the central locking remote is playing up. Initially wouldn't open the drivers door, now not doing the passenger door either. Have to use the keys on both. Remote still arms and disarms the alarm fine. Auto alarm function also still comes on (though no longer auto locks the doors). Any ideas anyone? My auto electrician says without looking it could be a whole range of stuff and will take 1-10 hours to fix. At $100/hr thats a concern to start trying to deal with. Any ideas as to what it might be and where to look first?