1992 318i

I am having issues with the central locking system. The only key that will cause the doors to lock is the driver door. When you turn the key to the 45 degree angle all the locks will lock and then unlock. When you try this in the passenger door nothing happens. Also the driver door does not unlock after all the other doors unlock. Does anybody have an idea on where to start? Can the locks be bypassed somehow to try and determine which is causing the problem?

Thanks!

not sure of the exact system, but as for simple electrical diagnosis, you could remove the door panels and unplug each solenoid/actuator and go through it that way with the process of elimination. hope this helps.

not sure of the exact system, but as for simple electrical diagnosis, you could remove the door panels and unplug each solenoid/actuator and go through it that way with the process of elimination. hope this helps.


So are you saying that if I unplug the back systems and only use the front doors that it will ignore the back doors and work properly if the front are ok?