Thanks for your answer, Not expecting clearing the codes will fix the issue but repair/rebuild/replace in all those cases I need to clear the codes eventually. I have rebuild diverse car electronics just wanted to have a go before i chuck it in the bin. Repair might not be an option for most commercial applications but as a hobbyist I am able to spend time one it. This car has had this fault for years it was usually cleared about every 6 months so i am very keen to see what's going on in the unit.I do have the schematics, know how and details but it’s not something I would publish on here due to I.P. I would be careful in clearing the faults and expecting that to fix the issue, the steering system is a safety critical component and I was involved in the set-up of the remanufacture of these products in Czech for 24 months, but it was decided that remanufacture and repair was not a path TRW was gonna take.
I do understand your reservations though,