Volkswagen New Beetle. Manual - part 1671

Fig. 51: Disconnecting Pin Connector From Engine Coolant Temperature (ECT) Sensor With 
Engine Coolant Temperature (ECT) Sensor 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

If display jumps to approx. -48.0 C: 

z

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 off ignition.  

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Replace Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant Temperature (ECT) 
sensor -G2-, see item 28 .  

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Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory, see DTC 
MEMORY OF MOTRONIC ENGINE CONTROL MODULE (ECM) -J220-, CHECKING AND 
ERASING .  

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Read readiness code, see READINESS CODE, DISPLAYING . If DTC memory has been erased or 

 

2003 Volkswagen New Beetle GLS 

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

  

Motronic Engine Control Module (ECM) -J220- was disconnected from battery positive, readiness code 
must be generated again, see READINESS CODE, GENERATING .  

If display remains at approx. 143.0 °C: 

z

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 off ignition.  

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Check wiring using Electrical Wiring Diagram, see CHECKING WIRING .  

Checking wiring 

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Remove inner plenum chamber cover, left:  

See PLENUM CHAMBER INNER COVER, REMOVING AND INSTALLING 

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Connect VAG 1598/31 test box to control module wiring harness. Motronic Engine Control Module 
(ECM) -J220- is not connected by this action. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 52: Connecting VAG 1598/31 Test Box To Control Module Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Disconnect 4-pin connector from Engine Coolant Temperature (ECT) sensor -G62- with Engine Coolant 
Temperature (ECT) sensor -G2- -arrow-. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 53: Disconnecting Pin Connector From Engine Coolant Temperature (ECT) Sensor With 
Engine Coolant Temperature (ECT) Sensor 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check wire for open circuit between test box and 4 -pin connector using Electrical Wiring Diagram. 

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terminal 3 + Socket 93  

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terminal 4 + Socket 108  

Wire resistance: max. 1.5 

 

2003 Volkswagen New Beetle GLS 

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