Volkswagen New Beetle. Manual - part 1393

 

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Volkswagen New Beetle. Manual - part 1393

 

 

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Specification: approx. battery Voltage  

If specification not obtained: 

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Check wiring/connections to -N75-.  

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Switch OFF ignition.  

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Connect VAG1598/22 (or 1598/31) Test Box to ECM wiring harness. 

Fig. 116: Connecting VAG1598/22 (Or 1598/31) Test Box To ECM Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check wiring for open circuit between Test Box and harness connector using Wiring diagram. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Diesel Fuel Injection, 1.9L ALH - New Beetle

  

Fig. 117: Identifying Wastegate Bypass Regulator Valve -N75- Harness Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Up to MY 1999 

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Terminal 1 + socket 28  

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Terminal 2 + socket 15  

From MY 2000 

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Terminal 1 + socket 2  

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Terminal 2 + socket 62  

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Wire resistance: 1.5 ohm maximum  

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Diesel Fuel Injection, 1.9L ALH - New Beetle

  

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Check wires for shorting to: one another, Ground and Battery +.  

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Specification: INFINITY ohm  

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Correct any open/short circuit as necessary.  

If no open or short circuits exist: 

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Replace Engine Control Module.  

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Display the Readiness code. See READINESS CODE, DISPLAYING .  

If DTC memory was erased: 

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Set the readiness code. See READINESS CODE, SETTING .  

Mass Air Flow (MAF) Sensor -G70-, checking 

ECM uses MAF Sensor -G70- signal to calculate injection quantity and for regulating EGR. The smaller the -
G70- signal; the smaller the quantity of injected fuel. 

Special tools 

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VAG1551/1552 Scan Tool using VAG1551/3 Adapter cable  

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VAG1598/22 Test Box (MY 1999)  

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VAG1598/31 Test Box (from MY 2000)  

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Fluke 83 multimeter  

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VW 1594 Adapter kit  

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Wiring diagram  

Test sequence 

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Connect VAG1551/1552 Scan Tool. See VAG1551/1552 SCAN TOOL, CONNECTING and start 
engine and let idle.  

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Press -0- and -1- buttons to select Address word 01: "Engine electronics"  

Display will appear as shown (example only):

WARNING:

For safe operation, use a second technician to operate test equipment 
and take readings from back seat, during test drive.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Diesel Fuel Injection, 1.9L ALH - New Beetle

  

Fig. 118: Scan Tool Display - Mass Air Flow Sensor (1 Of 7) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Press --> button.  

Display will appear as shown: 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE Diesel Fuel Injection, 1.9L ALH - New Beetle

  

 

 

 

 

 

 

 

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