Volkswagen New Beetle. Manual - part 1351

 

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Volkswagen New Beetle. Manual - part 1351

 

 

Display will appear as shown (1 to 4 = Display zones):

Fig. 159: Scan Tool Display - Vehicle Speed Signal (4 Of 4) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Take a test drive using a 2nd technician to observe display.  

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Observe value in Display zone 1  

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Specification: approx. speedometer display  

If no speed indicated: 

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

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 160: Connecting VAG1598/22 (Or 1598/31) Test Box To ECM Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Connect LED test light between sockets:  

Up to MY 1999 

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1 (Ground) and 51 (road speed signal).  

From MY 2000 

 

2003 Volkswagen New Beetle GLS 

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

  

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4 (Ground) and 20 (road speed signal).  

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Switch ON ignition and turn front left wheel by hand.  

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Voltage tester LED must blink (approx. four times per wheel rotation)  

If LED does not blink: 

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Check wiring for open/short circuit between following ECM harness connector terminal and instrument 
cluster using Electrical Wiring Diagram.  

See appropriate System Wiring Diagram article. 

Up to MY 1999 

Terminal 51 

From MY 2000 

Terminal 20 

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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 .  

Throttle Position (TP) sensor -G79-, checking up to MY 99 

Throttle Position (TP) sensor -G79- is located on accelerator pedal and communicates physical pedal position to 
Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM). 

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, or equivalent  

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VW 1594 Adapter kit  

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Electrical Wiring Diagrams, Troubleshooting & Component Locations  

Test sequence 

NOTE:

If necessary, hold the front right wheel to prevent it from turning.

 

2003 Volkswagen New Beetle GLS 

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

  

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Connect VAG1551/1552 Scan Tool. See VAG1551/1552 SCAN TOOL, CONNECTING and switch 
ON ignition but do not start engine.  

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

Display will appear as shown (example only): 

Fig. 161: Scan Tool Display - Throttle Position Sensor, Up To MY 99 (1 Of 6) 
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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