SERIES 60 EGR TECHNICIAN'S GUIDE VNT Controls EGR Mode (Flow) The VNT turbocharger is the mechanism used to change the EGR rate. The VNT is controlled via the DDEC PWM#4 to regulate air pressure to change the nozzle vane position within the turbocharger. Changes to the vane position, either closing or opening, result in an increase or decrease to the EGR flow rate. All information subject to change without notice. (Rev. April 2004) 3-9 7SE60 0404 Copyright © 2004 DETROIT DIESEL CORPORATION