Volkswagen New Beetle. Manual - part 1711

 

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Volkswagen New Beetle. Manual - part 1711

 

 

If the specifications are not obtained: 

z

Press --> button.  

z

Press buttons -0- and -6- for "End output" function and confirm input with -Q- button.  

z

Switch off ignition.  

z

Remove inner plenum chamber cover, left: 

See PLENUM CHAMBER INNER COVER, REMOVING AND INSTALLING 

z

Connect VAG 1598/31 test box to control module wiring harness. Motronic Engine Control Module 
(ECM) -J220- is not connected by this action. 

(Switch B at "ON")

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 189: Connecting VAG 1598/31 Test Box To Control Module Wiring Harness 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check wiring from Motronic Engine Control Module (ECM) -J220- to CCS operating switch for 
open/short circuits:  

z

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
 .  

z

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 .  

CAN-bus, checking 

Function 

The Motronic Engine Control Module (ECM) - J220- communicates with all data -bus capable control modules 
via a CAN -bus. 

The data-bus capable control modules are connected and exchange information (messages) via two data -bus 
wires (CAN -High and CAN-Low) that are twisted to each other. Missing information on the data-bus is 
recognized as a malfunction by the Motronic Engine Control Module (ECM) -J220- as well as by other CAN-
bus control modules. 

The data-bus requires an adapting resistor to function fault-free. This central adapting resistor is located in the 
Motronic Engine Control Module (ECM) -J220-. 

Diagnosis via the CAN-bus wire is undertaken via the diagnostic interface for data -bus -J533- in the 
"Gateway". 

See DATA BUS ON BOARD DIAGNOSTIC INTERFACE -J533- "GATEWAY" 

Further information: 

See Self Study Program "The CAN data bus". 

Special tools and equipment 

z

VAG 1598/31 test box  

z

Multimeter (Fluke 83 or equivalent)  

z

VW 1594 adapter set  

NOTE:

Control modules which are actively connected via data bus to the Motronic 
Engine Control Module (ECM) -J220- can be read in measured value blocks 125 
and 126.

 

2003 Volkswagen New Beetle GLS 

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

  

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Electrical Wiring Diagram  

Test conditions 

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Malfunction has been recognized by Data Bus On Board Diagnostic (OBD)  

z

All fuses must be OK 

Fig. 190: Identifying Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Battery voltage must be at least 11.5 V  

z

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

 

2003 Volkswagen New Beetle GLS 

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

  

z

Air conditioner must be switched off  

z

Selector lever of the automatic transmission must be in "P" or "N" position  

Test sequence 

z

Switch off ignition.  

z

Unlock Motronic Engine Control Module (ECM) - J220- connector and disconnect it.  

z

Connect VAG 1598/31 test box to Motronic Engine Control Module (ECM) -J220-. Control module 
wiring harness is not connected by this action.  

z

Check centralized adapting resistor in Motronic Engine Control Module (ECM) -J220- by performing a 
resistance measurement between test box 

Sockets 58 + 60 

Specification: 60 to 72 

If the resistance value is outside the specified range: 

z

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

If the resistance value is within the specified range: 

z

Check CAN-Bus wiring using Electrical Wiring Diagram. 

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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