2009 Maxxforce DT turbo actuator not working

Another Maxxforce DT problem | TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board (thetruckersreport.com)
See post #4.

 

There are normally three wires to an actuator. One for Power, One for Ground and One for output to the computer for actual positioning. When the computer is activated (ignition cycled to "on") the computer performs a sweep of all actuations, meaning the VGT will perform a zero to full sweep. The computer will measure the input at the other wire. What I suspect is happening is the vgt is given a stepped voltage at key on, that the ecm cannot see the interupted voltage exhibited during normal, slower movements of the actuator leaving it in "limp mode". Its easy to send voltage to something and it function as needed but try the Pulse Width Modulated way and that's when problems show their faces. I would test the circuit integrity and the return signal voltage in each key on and running charactristics.