I have just obtained the MaxiDiag Elite MD802 All Systems, and I must say it's a fine tool in view of the extent of its vehicle and electronic coverage. However, it does not seem to support (yet) the HVAC module in my cars, namely, Infiniti M45 (2006) and G20 (1999) as well as Nissan Maxima 2006. I hope updates will soon be released for these.