Exhaust turbocharging system (engine code AWP, AWW), overview

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Fig 1: Exhaust Turbocharging System (Engine Code AWP, AWW), Overview

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - Connecting hose

From the Leak Detection Pump (LDP) V144

2 - To vacuum reservoir

Below front right wheel housing liner

3 - Non-return valve

4 - Turbocharger

5 - Vacuum diaphragm

For boost pressure regulator valve

6 - Deceleration shut-off valve

7 - Brake booster

8 - Non-return valve

For brake booster

9 - Wastegate Bypass Regulator Valve N75

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

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

11 - Crankcase housing ventilation pressure regulator valve

12 - Combi-valve

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

13 - To vacuum reservoir

14 - Fuel pressure regulator

15 - Crankcase ventilation

16 - Non-return valve

17 - Turbocharger Recalculating Valve N249

18 - Secondary air injection (AIR) solenoid valve N112

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

19 - Suction jet pump

20 - Secondary Air Injection (AIR) Pump Motor V101

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

21 - Intake manifold

22 - Charge Air Pressure Sensor G31

23 - Air charge cooler

24 - Non-return valve

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

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

26 - Connecting hose

To EVAP canister