Wastegate Actuator: Service and Repair

Connection Diagram for Boost Pressure Regulation and Vacuum Control System, from 07.2002





1 Resonator

2 Mechanical recirculating valve

• Checking, refer to => [ Mechanical Recirculating Valve, Checking ] Component Tests and General Diagnostics

3 Secondary Air Injection (AIR) Pump Motor (V101 )

4 Wastegate Bypass Regulator Valve (N75)

5 Air filter housing

• With mass air flow sensor (G70)

6 Non-return valve

• Installation position: Arrow points in direction of flow, as shown in figure.

7 To EVAP canister

8 Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)

9 Turbocharger

10 Crankcase housing ventilation pressure regulator valve

11 Secondary Air Injection (AIR) combination valve

12 Non-return valve

• Installation position: Arrow points in direction of flow, as shown in figure.

13 To brake booster

14 Vacuum suction jet pump

15 Non-return valve

• Installation position: Arrow points in direction of flow, as shown in figure.

16 Crankcase ventilation

17 Vacuum reservoir

18 Non-return valve

• Installation position: Arrow points in direction of flow, as shown in figure.

19 to Leak detection pump (LDP) (V144)

20 Non-return valve

• Installation position: Arrow points in direction of flow, as shown in figure.

21 Secondary air injection (AIR) solenoid valve ( N112)

• Component location: Below intake manifold

22 Air charge cooler

• With charge air pressure sensor (G31)

23 Turbocharger Recirculating Valve (N249)

• Component location: Below intake manifold

24 Charge air regulation vacuum diaphragm

• When the secondary air combi-valve opens, the mechanical charge air regulation valve in the turbocharger will open and the secondary air will be guided directly to the catalytic converter