Volkswagen New Beetle. Manual - part 1386

 

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Volkswagen New Beetle. Manual - part 1386

 

 

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Terminal 4 + socket 103  

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Wire resistance: 1.5 ohm maximum  

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Check wires for short to one another, to Ground and to Battery +  

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Specification: INFINITY ohm  

If wiring OK: 

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Replace Engine Control Module -J248-. See Engine Control Module (ECM), replacing .  

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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 .  

Modulating piston displacement sensor -G149- and quantity adjuster -N146-, checking 

The quantity adjuster -N146- is an electro-magnetic swivel type positioner, controlled by the ECM via regulated 
duty cycle (ON-OFF ratio). The eccentric shaft on -N146- moves the Modulating piston on the high pressure 
piston thereby regulating the quantity of fuel injected. 

The Modulating piston displacement sensor -G149- communicates the position of -N146- to the ECM thereby 
determining the quantity of fuel to be injected. 

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 .  

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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):

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 85: Scan Tool Display - Modulating Piston Displacement Sensor & Quantity Adjuster (1 Of 5) 
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

  

Fig. 86: Scan Tool Display - Modulating Piston Displacement Sensor & Quantity Adjuster (2 Of 5) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Press -0- and -8- buttons to select Function 08: "Read measuring value block".  

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Press -Q- button to enter input.  

Display will appear as shown: 

Fig. 87: Scan Tool Display - Modulating Piston Displacement Sensor & Quantity Adjuster (3 Of 5) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Press buttons -0-, -0- and -1- to select "Display group 1".  

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Press -Q- button to enter input.  

Display will appear as shown: 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 88: Scan Tool Display - Modulating Piston Displacement Sensor & Quantity Adjuster (4 Of 5) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check Engine Coolant Temperature value in Display zone 4.  

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Specification: 85 °C minimum  

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Continue with check only when temperature speck. is obtained.  

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Check value in Display zone 3 (Voltage from Modulating piston movement).  

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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