Normal. It's the boost pressure times the diaphragm area to move it, so it's surprisingly high effort. This allows the wastegate valve to be pulled hard shut against exhaust pressure, but be opened by relatively low boost pressure.Got the actuator to move after soaking but it takes about 50lbs of pull force.
IIRC, the trans controller has diagnostic wires attached but not connected. You should be able to find these and read codes. Maybe, and it may be only serial data, not a pulse stream (light) output. I think the diagram attached is correct for our ITVs, but no guarantees. If so, the Tech Guide should also apply. PCS has been non-responsive to others, but who knows. Give them a call and your best shot.Is there a unit I can buy to get codes from the transmission computer to see if it is sending errors too?
[EDIT] BTW, I have other documents, and a file called "TCU-CD.exe" which is supposedly the PCS software to interface with the TCU - but I haven't checked it in any way. LMK your progress, and you can decide if any other stuff I have might be useful. I had a no-shift trans issue that was simply a connector knocked loose off-roading, so I have not had motivation to look any deeper on this. I also had a programmer to help design a replacement TCU, but he evaporated during COVID, so ...
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