Volkswagen New Beetle. Manual - part 1672

 

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Volkswagen New Beetle. Manual - part 1672

 

 

Fig. 54: Identifying ECT Sensor Harness Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check wiring between test box and 4 -pin connector terminal 3 for short circuit to wire terminal 4 and to 
vehicle Ground (GND) using Electrical Wiring Diagram.  

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terminal 3 + socket 108  

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terminal 3 + vehicle Ground (GND)  

Specification: INFINITY ohm 

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Additionally check both wires for short to battery positive. 

 

2003 Volkswagen New Beetle GLS 

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

  

Specification: 

If no wiring malfunctions are detected: 

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Perform resistance measurement on Engine Coolant Temperature (ECT) sensor -G62- terminal C (signal) 
and D (Ground). 

Fig. 55: Identifying ECT Sensor Terminals 
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. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 56: ECT Sensor Resistance Versus Temperature Range Graph 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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  

If the specification is not obtained: 

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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 there is no malfunction in the wiring and the resistance measurement values are OK: 

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

Intake Air Temperature (IAT) sensor, checking 

Special tools, test equipment and auxiliary items 

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VAG 1551 scan tool or VAG 1552 mobile scan tool with VAG 1551/3B cable  

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VAG 1598/31 test box  

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VAG 1526 A or Fluke 83 multimeter  

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VAG 1594 adapter set  

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Electrical Wiring Diagram  

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VAG 1921 pliers for spring type clips  

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Chilling spray (commercially available)  

Test sequence 

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Connect VAG 1551 scan tool ((VAG 1552). Switch ignition on and select Motronic Engine Control 
Module (ECM) -J220- with "Address word" 01. Connecting scan tool and selecting Motronic Engine 
Control Module (ECM) -J220-, see VAG 1551, CONNECTING AND SELECTING MOTRONIC 
ENGINE CONTROL MODULE (ECM) -J220-
 .  

Indicated on display 

NOTE:

Only gold-plated terminals must be used to repair the terminals in the Intake Air 
Temperature (IAT) sensor.

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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