The 2005 CRD is the only KJ that has an FCM module fitted.
This is a box about the size of a small pack of cigaretes inside the engine bay near the battery.
It has one electrical connector on it which is exposed to the elements somewhat so a good cleaning of the contacts may help.
This FCM module basically controls the various Serial Busses floating around....the Service Manual states that there are no drivers inside the FCM but I have seen a picture of an opened FCM and it has plenty of Transistors and Module inside it!
These FCM modules are difficult to get hold of apparently....most Breaker Yards have run out of them!
This FCM module is known to cause problems that are only fixed by replacing it but you need to first trace/replace the wiring around your steering wheel seeing as the problem occurs when you adjust the wheel height!