Question. I've got a 2008 cummins 6.7 with a CM2100 running in standalone mode and with a scangauge and also efilive data viewer I show IAT at 250-400F.

That just seems wrong to me. I've mapped out the wires directly to the ECM and I think I've got the right sensors.

People keep telling me I got the wrong sensors but I'm pressure sure they are correct.

If I unplug pin 1 at the ECM, the scan gauges goes to -23F so I know pin 1 is the input for the IAT readings.

Anyone have any ideas?

Or maybe I still have the wrong part number?

How can I test the MAP sensor on the bench?

I've replaced all the map / iat sensors.
2897333 at the intake manifold
2897332 at the airbox near the MAF

I've also verified the wires from sensor to ecu pins.
for MAP
pin 1 boost pressure to pin 19 ecm (c1)
pin 2 5v to pin 36 ecm (c1)
pin 3 air intake temp pin 1 ecm (c1)
pin 4 ground pin 48 ecm (c1)

and also the airbox pressure / temp sensor
pin 1 inlet air pressure pin 20 ecm (c1)
pin 2 5v
pin 3 inlet temp pin 24 ecm (c1)
pin 4 grd