Volkswagen New Beetle. Manual - part 1644

Diagram. 

If the specification is obtained: 

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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. 

Fig. 163: Connecting Vag 1598/31 Test Box To Control Module Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check wiring for open circuit between test box and connector using Electrical Wiring Diagram. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 164: Identifying Clutch Vacuum Vent Valve Switch Harness Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

terminal 3 + socket 39 

Wire resistance: Max. 1.5 ohm 

If the specification is obtained: 

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Additionally check wires for short to one another.  

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Additionally check wiring for short to battery positive or Ground GND). 

If no wiring malfunction is found: 

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

Signal from Clutch Vacuum Vent Valve Switch -F36-, checking, vehicles through MY 2000 

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  

 

2003 Volkswagen New Beetle GLS 

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

  

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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  

Test conditions 

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All fuses must be OK. Fuse holder is located behind access panel at far left end of dash. 

Fig. 165: Locating Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC.

 

2003 Volkswagen New Beetle GLS 

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

  

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Battery voltage must be at least 11.5 V  

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All electrical accessories, e.g. lights and rear window defroster must be switched off  

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 

Fig. 166: Identifying Scan Tool Display - Checking Signal From Clutch Vacuum Vent Valve 
Switch, Vehicles Through MY 2000 (1 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Press buttons -0- and -8- for function "Read measuring value block" and confirm entry with -Q- button. 

Indicated on display 

 

2003 Volkswagen New Beetle GLS 

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