Volkswagen New Beetle. Manual - part 1293

 

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Volkswagen New Beetle. Manual - part 1293

 

 

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. 

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

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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. 

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

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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

  

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

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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: 

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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 

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Replace turbocharger.  

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

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

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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: 

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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: 

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Replace turbocharger assembly.  

Wastegate Bypass Regulator valve -N75-, checking 

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Switch ignition off.  

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Disconnect Wastegate Bypass Regulator valve.  

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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

  

Fig. 9: Measuring Resistance Between Wastegate Bypass Regulator Valve Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Specification: 14 to 20 ohms 

If specification not obtained: 

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Replace Wastegate Bypass Regulator valve -N75-.  

If specification obtained: 

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Switch ignition on.  

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Measure supply voltage at valve connector terminal 1 and at engine Ground. 

Fig. 10: Measuring Supply Voltage At Wastegate Bypass Regulator Valve Connector Terminal

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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