Volkswagen New Beetle. Manual - part 1726

 

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Volkswagen New Beetle. Manual - part 1726

 

 

Fig. 5: Overview Of Exhaust Turbocharging System (Vehicles With Engine Code APH)
Courtesy of VOLKSWAGEN OF AMERICA, INC.
 

Overview plan of exhaust turbocharging system (Vehicles with engine code AWP, AWV) 

The following list pertains to Fig. 6 . 

1. Connection hose 

z

From the Leak detection pump (LDP) -V144-  

2. Vacuum reservoir 

z

below front right wheel housing liner  

3. Check-valve  

4. Turbocharger  

5. Vacuum diaphragm 

z

For boost pressure regulator valve  

6. Pressure regulator valve for crankshaft housing ventilation  

7. Wastegate Bypass Regulator Valve -N75- 

z

Valve is activated (pulsed) by the Engine Control Module (ECM)  

z

Closed when no voltage present, limits charge pressure  

z

Checking, see WASTEGATE BYPASS REGULATOR VALVE, CHECKING  

8. Brake booster  

9. Combination valve 

z

For Secondary Air Injection (AIR) system  

z

Checking, see COMBINATION VALVE, CHECKING  

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

11. Check-valve  

12. Deceleration shut-off valve  

13. Secondary Air Injection (AIR) Pump Motor -V101- 

z

Checking function, see SECONDARY AIR INJECTION (AIR) PUMP MOTOR, CHECKING 

14. Suction jet pump  

15. Crankshaft housing ventilation  

16. Fuel pressure regulator  

17. Intake manifold  

18. Recirculating valve for turbocharger -N249- 

z

For Secondary Air Injection (AIR) system  

z

Checking, see COMBINATION VALVE, CHECKING  

19. Vacuum reservoir  

20. Secondary Air Injection (AIR) Solenoid Valve -N112- 

z

Checking, see SECONDARY AIR INJECTION (AIR) VALVE, CHECKING  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Turbocharger, G - Charger, 1.8L Generic Scan Tool - New Beetle

  

21. Charge Air Pressure Sensor -G31- 

z

Checking, see CHARGE AIR PRESSURE SENSOR, CHECKING  

22. Charge air cooler  

23. Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- 

z

Checking, see EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR 
VALVE, CHECKING
  

24. Connection hose 

z

to EVAP canister  

Fig. 6: Overview Of Exhaust Turbocharging System (Vehicles With Engine Code AWP, AWV) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Rules of cleanliness 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Turbocharger, G - Charger, 1.8L Generic Scan Tool - New Beetle

  

When working on turbocharger, carefully observe the following "5 Rules of Cleanliness": 

z

Thoroughly clean all connections and the surrounding area before disconnecting.  

z

Place parts that have been removed on a clean surface and cover them. Use lint-free cloths only!  

z

Carefully cover over opened components or seal, if repairs are not performed immediately.  

z

Only install clean components: Only unpack replacement parts immediately prior to installation. Do not 
use parts that have been stored loose (in tool boxes etc.)  

z

When the system is open:Avoid working with compressed air. Do not move vehicle unless absolutely 
necessary.  

Safety precautions 

If test and measuring equipment is required during road test, note the following: 

z

Test equipment must always be secured to the rear seat and operated from there by a second person.  

If test and measuring equipment is operated from the passenger seat, the person seated there could be injured in 
the event of an accident involving deployment of the passenger -side airbag. 

BOOST PRESSURE SYSTEM, CHECKING 

Boost pressure regulation, checking 

Recommended special tools and equipment e.g.: 

z

V.A.G 1397 A Turbocharger Tester 

WARNING:

Observe the following for all installations, especially in engine 
compartment due to lack of room: 

z

Route lines of all types (e.g. for fuel, hydraulic, EVAP canister 
system, coolant and refrigerant, brake fluid, vacuum) and electrical 
wiring so that the original path is followed.  

z

Watch for sufficient clearance to all moving or hot components.  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Turbocharger, G - Charger, 1.8L Generic Scan Tool - New Beetle

  

Fig. 7: Identifying V.A.G 1397 A Turbocharger Tester 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Test requirements 

z

No leaks on intake or exhaust side.  

z

Coolant temperature must be at least 80 °C, see DIAGNOSTIC MODE 1: CHECK MEASURED 
VALUES
 ; PID 5, Coolant temperature.  

Test sequence 

z

Charge pressure is measured under Wide Open Throttle (WOT) while driving or on the roller type test 
stand.  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Turbocharger, G - Charger, 1.8L Generic Scan Tool - New Beetle

  

 

 

 

 

 

 

 

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