Scangauge II and Manifold Pressure (MAP)

I recently installed a new Scangauge II and programmed it to read transmission and oil temperatures along with what gear the transmission is currently using.
FYI, at ambient 54 deg F: the water runs about 195, the oil about 180 and the torque converter about 195 after about 30 mile drive at 70 mph.

My question is: the Scangauge II indicates manifold pressure (MAP) but the reading is blank.
Any idea why the MAP is blank?
Surely the computer monitors intake manifold pressure.

thanks.

 

There is no manifold pressure sensor on these trucks

 

That would explain it then. Thanks for the reply.

 

How did you program it to read what gear you are in ?

 

Here's a list of the codes to enter into a Scangauge II for what gear.

https://www.scangauge.com/support/x-gauge-commands/toyota-lexus-scion/