. That engine has no MAT sensor, only IAT.
Actually the Honda ECU adapt the fuel mass according the fuel calibration only by two tables with respect to density: ECT and IAT over a fuel factor. If that IAT pin at ECU would be used for a MAT (manifold air temperature) sensor, then the correction table would reflect changes in vehicle speed or intercooler heat fluxes related changes to density. That approach would give the former IAT sensor a much higher value for the engine control, of which would not do justice to this. The stock IAT sensor is way to slow for a speed density like approach in a boosted concept.
The stock '02-'04 ECU is very limited, even for NA engines. Boosted engines can be done with it, but a quality calibration on highly transient boost looks differently. From my experience the '05-'06 ECU's are better on the knock system side, has a faster calculation capacity to cover this, but the distance to a real speed density system is still Amazonas river width like.