Congratulations. Good progress.
For pressures, you have to do the reading the right way. This is all described in several threads in here, but in simple terms:
There are no pressure gauges/sensors in the AHC system except for the one at the pump. This one is used by TechStream in an inventive...
With no AHC in TechStream and no AHC lights in the instrument panel, I would guess that either the AHC ECU is missing power or earth, or that the ECU doesn't know that the engine is running. There is an Alternator input on the AHC ECU, which I suppose is for the purpose of detecting that the...
Have you checked all the fuses, according to the wiring diagram? It is more than two - that's why i'm asking.
There are two fusible links hanging off the battery terminal.
Fuses (Size - name):
50 A - AHC (squarish one)
20 A - AHC-IG
15 A - AHC-B
7.5 A - AM1
Those 6 are required for the AHC-ECU...