Volkswagen New Beetle. Manual - part 1225

Specification: 1350 to 1750 bar 

Engine code AWP 

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Press print button between 1800 to 2300 RPM and read charge air pressure actual value in display zone 4. 

Specification: 1700 to 2000 bar 

Continued for all vehicles 

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Compare actual charge air pressure value with specified charge air pressure value in display zone 3. 

Difference: max. 100 mbar 

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Press --> button.  

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Press buttons -0- and -6- for "End output" function and confirm input with -Q- button.  

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Switch ignition off.  

If the charge air pressure is exceeded: 

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Check Charge Air Pressure Sensor -G31-. See CHARGE AIR PRESSURE SENSOR -G31-, 
CHECKING .  

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Check Wastegate Bypass Regulator Valve -N75-. (Hose from turbocharger via valve to pressure unit not 
blocked when connector is pulled off).  

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Check pressure unit for charge air pressure regulating valve is securely mounted on turbocharger.  

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Check pressure unit. See PRESSURE UNIT FOR WASTEGATE BYPASS REGULATOR VALVE -
N75-, CHECKING  

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Check shaft mount for charge air pressure regulating valve in turbocharger for ease of movement. When 
corroded together, replace turbocharger.  

If the charge air pressure is not attained: 

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Check Charge Air Pressure Sensor -G31-. See CHARGE AIR PRESSURE SENSOR -G31-, 
CHECKING .  

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

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Check shaft mount for charge air pressure regulating valve in turbocharger for ease of movement. When 
corroded together, replace turbocharger.  

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Turbocharger malfunctioning. Replace turbocharger. See TURBOCHARGER WITH 
ATTACHMENTS, REMOVING AND INSTALLING .  

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Check DTC memory: 

NOTE:

Repeat the measurement if the charge air pressure has not fully built-up or 
there is a large difference between specified and actual values.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - New Beetle, 1.8L (APH, AWV & AWP)

  

See Diagnostic Trouble Code (DTC) Memory, Checking And Erasing .

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Read readiness code: 

See Readiness Code, Displaying . 

If the DTC memory has been erased or the engine control module separated from the permanent positive, the 
readiness code must be generated again. 

See Readiness Code, Displaying . 

Wastegate Bypass Regulator Valve -N75-, checking 

Special tools and equipment 

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VAG 1551 scan tool or vehicle system tester VAG 1552 with cable VAG 1551 /3B  

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VAG 1526 Hand multimeter or VAG 1715 multimeter  

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Adapter set VAG 1594  

Test conditions 

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Output Diagnostic Test Mode (DTM) carried out 

See Output Diagnostic Test Mode (DTM) . 

Test sequence 

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Switch ignition off.  

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Pull 2-pin connector off Wastegate Bypass Regulator Valve -N75- -arrow-. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - New Beetle, 1.8L (APH, AWV & AWP)

  

Fig. 16: Pulling 2-Pin Connector Off Wastegate Bypass Regulator Valve N75 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Measure resistance between valve contacts. 

Specification: 25-35 ohm 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - New Beetle, 1.8L (APH, AWV & AWP)

  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE Exhaust System, Emission Controls - New Beetle, 1.8L (APH, AWV & AWP)