Volkswagen New Beetle. Manual - part 1941

 

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Volkswagen New Beetle. Manual - part 1941

 

 

Fig. 8: Lifting Left Cover Of Plenum Chamber In Center Of Instrument Panel And Unclip 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Pull cover -1- toward vehicle center out of bracket underneath A-pillar (arrow B).  

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Then disengage connector from control module and disconnect.  

Vehicles with 80-pin Engine Control Module (ECM, engine code AEG) 

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Connect VAG1598/22 test box at control module wiring harness. 

Fig. 9: Connecting VAG1598/22 Test Box At Control Module Wiring Harness (80-Pin ECM) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Vehicles with 121-pin Engine Control Module (ECM, engine code AVH, AZG, BDC) 

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Connect VAG1598/31 test box at control module wiring harness. Engine Control Module (ECM) is not 
connected. 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 2.0L Generic Scan Tool - New Beetle

  

Fig. 10: Connecting VAG1598/31 Test Box At Control Module Wiring Harness (121-Pin ECM) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Continuation for all vehicles 

When harness connectors are disconnected from the Engine Control Module (ECM) or the battery is 
disconnected, all adaptation values in the control module are erased. DTC memory content will remain intact 
however. If the engine is started after this, rough, uneven idle can result. In this case, the readiness code must be 
generated again. See READINESS CODE, GENERATING . 

Malfunction Indicator Lamp (MIL) in instrument cluster, checking 

Meaning of emissions MIL 

The Malfunction Indicator Lamp (MIL) lights up when emissions relevant malfunctions are recognized by the 
Engine Control Module (ECM). 

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 2.0L Generic Scan Tool - New Beetle

  

Component location of emissions MIL 

Fig. 11: Identifying Component Location Of Emissions MIL 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Blinking: There is a malfunction that causes damage to the catalytic converter in this driving condition. In 
this case, vehicle must only be driven at reduced performance!  

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Continuously lit: There is a malfunction that causes increased emissions. Check DTC memory for 
Motronic control module.  

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DTC memory must still be checked if there are driveability problems or customer complaints and the 
MIL is not lit, since malfunctions can be stored without causing the MIL to light immediately.  

Recommended special tools and equipment 

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VAG1526 multimeter or VAG1715 multimeter  

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VAG1594 connector test kit  

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Wiring diagram  

Test requirement 

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The respective fuses of instrument cluster must be OK. 

NOTE:

The Malfunction Indicator Lamp (MIL) can blink or remain lit continuously. DTC 
memory must be checked in each case. See DIAGNOSTIC MODE 3: CHECK DTC 
MEMORY .

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 2.0L Generic Scan Tool - New Beetle

  

Fig. 12: Identifying Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Test sequence 

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Switch on ignition: The emissions MIL must light up.  

If emissions MIL does not light up when ignition is switched on: 

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Switch ignition off.  

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Check wire from ECM to emissions MIL as follows:  

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Connect test box to control module wiring harness. See TEST BOX FOR WIRING TEST, 
CONNECTING
 .  

Vehicles with engine code AEG 

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Bridge sockets 2 + 17 of test box with the respective adapter cables.  

Vehicles with engine code AVH, AZG and BDC 

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Bridge sockets 2 + 47 of test box with the respective adapter cables.  

Continuation for all vehicles 

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Switch on ignition: Emissions MIL must light up.  

If Malfunction Indicator Lamp (MIL) does not light up: 

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Switch ignition off.  

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Remove instrument cluster:  

NOTE:

Fuse holder is located behind access panel at far left end of dash.

 

2003 Volkswagen New Beetle GLS 

1998-2004 ENGINE PERFORMANCE On-Board Diagnostic (OBD), 2.0L Generic Scan Tool - New Beetle

  

 

 

 

 

 

 

 

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