Volkswagen New Beetle. Manual - part 1728

Fig. 10: Measuring Resistance Between Wastegate Bypass Regulator Valve Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Specified value: 25...35 ohm 

If specified value is not obtained: 

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Replace Wastegate Bypass Regulator Valve -N75- 

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Vehicles with engine code APH, see item 17 ,  

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Vehicles with engine code AWP, AWV, see item 22 .  

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Erase DTC memory of Engine Control Module (ECM), see DIAGNOSTIC MODE 4: RESET/ERASE 

 

2003 Volkswagen New Beetle GLS 

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

  

DIAGNOSTIC DATA .  

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Generate readiness code, see READINESS CODE, GENERATING .  

Charge air pressure sensor, checking 

Recommended special tools and equipment e.g.: 

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VAG1526 multimeter or VAG1715 multimeter  

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VAG1594 connector test kit  

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Wiring diagram  

Checking voltage supply and wiring to control module 

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Disconnect 4-pin connector -2- from Charge Air Pressure Sensor -G31- (-1-). 

Fig. 11: Disconnecting 4-Pin Connector From Charge Air Pressure Sensor 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Use adapter cables from (VAG1594) to connect multimeter to terminals 1 + 3 of connector for voltage 
measurement.  

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Switch ignition on. 

 

2003 Volkswagen New Beetle GLS 

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

  

Specified value: at least 4.5 V 

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Switch ignition off. 

If there is no voltage: 

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Connect test box to control module wiring harness, see CONNECT TEST BOX FOR WIRING TEST . 

Fig. 12: Measuring Voltage Between Charge Air Pressure Sensor Harness Connector Terminals 1 
And 3 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check for open circuits in wires between test box and connector according to wiring diagram. 

Terminal 1+socket 108 

Terminal 3 + socket 98 

Terminal 4 + socket 101

 

2003 Volkswagen New Beetle GLS 

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

  

Wire resistance: max. 1.5 ohm 

Fig. 13: Identifying Charge Air Pressure Sensor Harness Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check wires for short circuit to each other.  

If no malfunctions are found in the wires and there was voltage between terminals 1 + 3: 

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Check function, see CHECKING FUNCTION 

If no malfunctions are found in wires and there was no voltage between terminals 1 + 3: 

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Replace Motronic Engine Control Module (ECM) -J220-, see REPLACING ENGINE CONTROL 

 

2003 Volkswagen New Beetle GLS 

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