A friend of mine works as a Volvo service tech for a dealer and has said that the first generation S/V40's have very weak ECU's. For the techs to do a simple software update has led them in burning the ECU and having to replace them. About 3 out of 5 have been burned during software updates.
This is most likely your issue with your V40. I doubt any warrenty will cover this as you voided the warrenty by tampering with the ECU in the first place.
As the previous poster has stated this is the wrong forum for your type of question. Refer to the forum below as it has many knowlagble people who might be able to help you:
http://www.vvspy.com/