Sounds like your temp sensor is defaulting to the lowest range (most likely due to what was mentioned above).
When posting problems with the MAFT-pro, it is usually asked that you also post an export of your settings for others to review. This will encourage more help to come. Also, I would suggest registering (if you haven't already) at
www.fullthrottletech.com and mirror your maft-pro questions there (since they are the developers and experts on the maft-pro).
After doing those, in the mean time, I would check your wiring against this:
Even though that is for an 89+ 7mgte, you can still see how it is connected in general. Don't know if there are some translations to the pre 89 wiring harness floating around out there.
Btw, welcome to the forums.