Exhaust turbocharging system (engine code AWD), overview

1 - Connecting hose

• From Leak Detection Pump (LDP) V144

2 - To vacuum reservoir

• Below front right wheel housing liner

3 - Non-return valve

4 - Turbocharger

5 - Non-return valve

6 - Vacuum diaphragm

• For boost pressure regulator valve

7 - Deceleration shut-off valve

8 - Wastegate Bypass Regulator Valve N75

• Valve is activated (pulsed) by engine control module
• Check activation.

9 - Brake booster

10 - Non-return valve

• For brake booster

11 - Air filter with Mass Air Flow (MAF) Sensor G70

12 - Crankcase housing ventilation pressure regulator valve

13 - Combi-valve

• For Secondary Air Injection (AIR) system
• Checking, refer to Combi-valve, checking Combi-valve, checking 

14 - Fuel pressure regulator

15 - Non-return valve

16 - Turbocharger Recalculating Valve N249

17 - Secondary air injection (AIR) solenoid valve N112

• Checking, refer to Secondary Air Injection (AIR) Solenoid Valve N112 , checking 

18 - Crankcase ventilation

19 - Non-return valve

20 - Charge Air Pressure Sensor G31

• Replace O-ring if damaged

21 - Secondary Air Injection (AIR) Pump Motor V101

• Function, checking refer to Secondary Air Injection (AIR) Pump Motor V101 , checking 

22 - Air charge cooler

23 - To vacuum reservoir

24 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve 1 N80

• Check activation
• Function, checking refer to Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 , checking 

25 - Connecting hose

• To EVAP canister