Charge pressure control system, overview

The following list pertains to Fig 1.

1. Vent pipe 
   • For Wastegate Bypass Regulator Valve - N75-
   • To left connecting pipe
2. Wastegate Bypass Regulator Valve -N75- 
   • Testing, see WASTEGATE BYPASS REGULATOR VALVE -N75-, TESTING 
3. Pressure unit for charge pressure control 
   • For turbocharger, cylinder bank 1 (right)
4. Control pipe 
   • Between Wastegate Bypass Regulator Valve -N75- and turbochargers
5. Pressure pipe 
   • Supply pipe for control pressure
   • From turbocharger, cylinder bank 2 (left)
   • To Wastegate Bypass Regulator Valve -N75-
6. Pressure unit for charge pressure control 
   • For turbocharger, cylinder bank 2 (left)
Fig 1: Overview Of Charge Pressure Control System
Courtesy of AUDI OF AMERICA, INC.