F 350 4WD Super Duty V8-6.4L DSL Turbo (2008)
Turbocharger Vane Actuator: Description and Operation
TURBOCHARGER ACTUATOR
Turbocharger Actuator
The turbocharger actuator has internal diagnostics capability and sends information to the PCM for DTC generation. The PCM monitors and controls the
turbocharger geometry using the CAN. The turbocharger actuator controls the turbocharger geometry using an external mechanical linkage arm from the
actuator to the turbocharger. The turbocharger actuator is used to continually adjust the vanes of a turbocharger. By adjusting the vanes, the exhaust gas
flow can be routed to the turbine wheel at optimum efficiency.
The turbocharger actuator is cooled using the fuel cooling system to maintain a temperature below 145°C (293°F). The turbocharger actuator will not
respond to PCM commands when its internal temperature is greater than 145°C (293°F) and a DTC is set. When the internal temperature falls below 135
°C (275°F) the turbocharger actuator resumes normal operation.
The PCM reduces engine torque when the actuator temperature or engine coolant temperature is too high.
