Fiat Ducato Workshop & Owners Manual | Free Download Fiat Ducato. The Fiat Ducato is a light commercial vehicle developed by the Sevel joint venture between Fiat and PSA Peugeot Citroen, produces since 1981. Since 1981, more than 2.6 million Fiat Ducatos have been produced. The Ducato is the most common motorhome base used in Europe; with around two thirds of motorhomes using the Ducato base. Technical: Ducato 2003 2.8 JTD Manual - The FIAT Forum Mar 11, 2014Re: Ducato 2003 2.8 JTD Manual Hi Welcome fellow aussie to the forum, either one or more of the files have been corrupted during download (most likely) which means the CRC checksums don't match what is in the archive or the files on the Ducato forum are corrupt.