Paccar px6 cm2150 vgt problems

[Kiko]

Hello all. I have a paccar px6 or a Cummins isb cm2150 having vgt trouble. I am getting codes for abnormal update rate 2636, mechanical system not responding 2387, 3616 vgt nozzle position not responding or out of adjustment. Changed out the actuator and calibrated it with insite. Still getting codes. Turbo vanes seem to move freely enough. Doesn’t appear to have a boost leak. Ran a new wire from battery to actuator pigtail power. Ran another wire from pigtail to ecm plug on signal wire. No change. Ran new data link wires from actuator pigtail to ecm. No change. I do see as per schematic there is a termination resistor at the diagnostic port, which puzzles me, also another termination resistor on the harness which I can not find. Would anyone have any info that they think might help. Truck is a 2008 Kenworth single axle cube body.