Volkswagen New Beetle. Manual - part 1264

 

  Index      Volkswagen     Volkswagen New Beetle 1998-2008 year - service repair manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1262  1263  1264  1265   ..

 

 

Volkswagen New Beetle. Manual - part 1264

 

 

Fig. 4: Identifying Special Tools And Equipment 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Checking conditions 

z

No DTCs stored in Diagnostic Trouble Code memory 

See DTC Memory, Checking . 

z

No leaks from intake and exhaust systems.  

z

No stored DTCs from engine and fuel injection system, e.g. start of injection, fuel injectors and 
compression pressure.  

z

Engine oil temperature 80°C minimum.  

Test sequence 

Observe following if test and measuring instruments are required during a test drive: 

z

Test and measuring instruments must be secured to the rear seat and operated by a 2nd person from this 
location.  

z

Connect VAG 1551/1552 Scan Tool 

See VAG1551/1552 Scan Tool, Connecting . 

z

Start engine and let idle  

z

Press 0 and 1 buttons to select Address word 01 "Engine electronics" 

CAUTION: If test and measuring instruments are operated from the front passenger 

seat and the vehicle is involved in an accident, there is a possibility that 
the person sitting in this seat could receive serious injuries when the 
airbag is triggered.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

Display will appear as shown in Fig. 5 . 

Fig. 5: Identifying VAG 1551/1552 Scan Tool Display (1 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press 0 and 8 buttons to select Function 08: "Read measuring value block"  

z

Press Q button to enter input  

Display will appear as shown in Fig. 6 . 

Fig. 6: Identifying VAG 1551/1552 Scan Tool Display (2 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press 0, 1 and 1 buttons to select Display Group 11  

z

Press Q button to enter input 

Read measuring value block 11 --> 840 RPM 938 mbar 978 mbar 92 % 

Display will appear as shown 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

z

Accelerate vehicle in 3rd gear from about 1500 RPM under Wide Open Throttle.  

z

Press VAG 1551 PRINT button at approx. 3000 RPM. 

Read measuring value block 11 --> 3090 RPM 1866 mbar 1917 mbar 62% 

Specification: 1700 to 2200 mbar (in display zone 3) 

If specification not obtained: 

z

Perform Output Diagnostic Test Mode to activate Wastegate Bypass Regulator valve: 

See Function 03: Output Diagnostic Test Mode, Performing . 

Display will appear as shown in Fig. 7 . 

Fig. 7: Identifying VAG 1551/1552 Scan Tool Display (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

If rod moves but pressure specifications are not obtained 

z

Replace turbocharger.  

If rod does not move because solenoid valve is not working: 

z

Check Wastegate Bypass Regulator valve -N75-. See WASTEGATE BYPASS REGULATOR 
VALVE -N75-, CHECKING
 .  

z

Check vacuum hoses. See TURBOCHARGER, HOSE AND PIPE CONNECTIONS . 

NOTE:

The valve must function and the charge air pressure control rod must move 
back and forth (at least 3 to 4 times), as long as there is a vacuum in the 
vacuum reservoir.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

If rod does not move but solenoid operates: 

z

Connect VAG 1390 vacuum pump to Wastegate Bypass Regulator valve and check rod for ease of 
movement. 

Fig. 8: Connecting Turbocharger To VAG 1390 Vacuum Pump 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

If rod does not move easily: 

z

Replace turbocharger assembly.  

Wastegate Bypass Regulator valve -N75-, checking 

z

Switch ignition off.  

z

Disconnect Wastegate Bypass Regulator valve.  

z

Measure resistance between valve terminals.  

Engine code ALH 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - 1.9L 4-Cyl. - ALH, New Beetle

  

 

 

 

 

 

 

 

Content   ..  1262  1263  1264  1265   ..