Volkswagen New Beetle. Manual - part 1708

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Brake pedal not depressed: Max. 1.5  

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Brake pedal depressed: (no continuity)  

If the specifications are not obtained: 

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Replace Brake Light Switch -F- and Brake Vacuum Vent Valve Switch -F47-.  

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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 
Motronic Engine Control Module (ECM) -J220- was disconnected from battery positive, readiness code 
must be generated again, see READINESS CODE, GENERATING . 

If the specifications are obtained: 

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Connect multimeter to measure voltage between terminal 1 and Ground (GND). 

Specification: at least 11.5 V 

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Connect multimeter to measure voltage between terminal 2 and Ground (GND).  

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Switch on ignition. 

Specification: min. 11.5 V 

If the specifications are not obtained: 

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Check wiring between 4 -pin connector terminals 1 and 2 to central electric using Electrical Wiring 
Diagram. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 178: Identifying Brake Light Switch And Brake Vacuum Vent Valve Switch Harness 
Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

If the specifications are 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. 

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 179: 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 4 -pin 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. 180: Identifying Brake Light Switch And Brake Vacuum Vent Valve Switch Harness 
Connector Terminals 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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terminal 3 + socket 55  

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terminal 4 + socket 56  

Wire resistance: Max. 1.5 ohm 

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Also check wires for short to one another.  

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Also 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 

 

2003 Volkswagen New Beetle GLS 

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