The link below is from an older thread. Hopefully it helps.
http://www.mediafire.com/download/wgev1ww9dc1c27g/Mazda5_WM.zip.
Another link that I found that has the manuals listed below is http://auto.webproxy.at/doku/Mazda5_WM/.
WM = Workshop Manual
TG = Tech Guide
WD = Wiring Diagram