Volkswagen New Beetle. Manual - part 1675

 

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Volkswagen New Beetle. Manual - part 1675

 

 

Fig. 65: Connecting VAG 1598/31 Test Box To Control Module Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Disconnect connector -1- from Intake Air Temperature (IAT) sensor -2-. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

Fig. 66: Disconnecting Connector From Intake Air Temperature (IAT) Sensor 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check wiring between test box and 2 -pin connector -1- for open circuit according to Electrical Wiring 
Diagram. 

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Terminal 1 + Socket 85  

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Terminal 2 + Socket 108  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

Fig. 67: Identifying IAT Sensor Harness Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Wire resistance: max. 1.5 

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Additionally check both wires for short to battery positive. 

Specification: INFINITY ohm 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

If no wiring malfunctions are detected:

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Perform resistance measurement on Intake Air Temperature (IAT) sensor -G42- terminals 1 (signal) and 2 
(ground). 

Fig. 68: Performing Resistance Measurement On Intake Air Temperature (IAT) Sensor Terminal1 
(Signal)
 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Scale A shows resistance values for temperature range 0 to 50 °C and scale B the values for temperature range 
50 to 100 °C. 

Examples: 

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30 °C is in range A and corresponds to a resistance of 1.5 to 2.0 kohm  

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80 °C is in range B and corresponds to a resistance of 275 to 375 ohm 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Multiport Fuel Injection (MFI) , 1.8L AWP, AWV - New Beetle

  

 

 

 

 

 

 

 

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