thanks again ede65 turns out we didn't need to replace the computer after, all the low speed on the radiator fan was staying on all the time even with the key off, my tech misdiagnosed it as a faulty computer and after a little further research we figured out this vehicle has a TIPM--totally integrated power module--(fuse box with a built in module) and it seemed to have a faulty connection- or faulty circuit board--we checked all the wiring to and from it and all the connectors at the tipm - reconnected everything with dielectric grease and so far so good, I still have not found the procedure you mentioned but when I do ill save it , thanks again