Volkswagen New Beetle. Manual - part 1660

Fig. 17: Locating Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

Test sequence 

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Connect VAG 1551 scan tool (or VAG 1552). Start engine and select "Address word" 01 of Motronic 
Engine Control Module (ECM) -J220-. Engine must be running at idle speed. 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. 18: Identifying Scan Tool Display - Checking HO2S After TWC (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

  

Fig. 19: Identifying Scan Tool Display - Checking HO2S After TWC (2 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Press buttons -0-, -4- and -1- for "Display group number 41" and confirm entry with -Q- button. 

Indicated on display (1 to 4 Display zones) 

Fig. 20: Identifying Scan Tool Display - Checking HO2S After TWC (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

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Check status of Heated Oxygen Sensor (HO2S) behind Three Way Catalytic Converter (TWC) in display 
field 4: Display: Htg.aC.ON, Htg.aC.OFF (alternating)  

DISPLAY GROUP 41: HEATED OXYGEN SENSOR (HO2S) BEFORE AND AFTER THREE WAY 
CATALYTIC CONVERTER (TWC) 

 

Display zones

1

2

3

4

Display group 41: Heated Oxygen Sensor (HO2S) before and after Three Way Catalytic Converter 
(TWC)
Display

-

Htg.bC.ON / Htg.bC.OFF

-

Htg.aC.ON / Htg.aC.OFF

Indicated

- Heated Oxygen Sensor (HO2S) before 

Three Way Catalytic Converter (TWC) 

ON 

or 

Heated Oxygen Sensor (HO2S) before 

Three Way Catalytic Converter (TWC) 

OFF

-

Heated Oxygen Sensor (HO2S) after Three 

Way Catalytic Converter (TWC) ON

or

Heated Oxygen Sensor (HO2S) after Three 

Way Catalytic Converter (TWC) OFF

Working 
range

-

-

-

-

Specification -

-

-

Htg.aC.ON

Htg.aC.OFF

(occasionally alternating)

 

2003 Volkswagen New Beetle GLS 

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

  

If the specification is obtained: 

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Press --> button.  

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

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Switch off ignition.  

Continuation 

If the specifications are not obtained: 

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Press --> button.  

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

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Switch off ignition.  

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Remove protective cover -arrows- and separate 4-pin connector (brown/black) -1- to Oxygen sensor after 
Three Way Catalytic Converter (TWC) -G130-. 

-

-

-

If the specification is not achieved, see 

CHECKING VOLTAGE SUPPLY , 

Continuation

NOTE:

The Heated Oxygen Sensor (HO2S) may be switched ON or OFF depending on 
the operating conditions of the engine, therefore the display in display zone 4 
may show "Htg.aC.ON" or alternating from "Htg.aC.ON" to "Htg.aC.OFF."

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 21: Separating 4-Pin Connector (Brown/Black) -1- For HO2S -G130- After TWC 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Set multimeter to check resistance and connect it to terminals 1 + 2 of Oxygen Sensor connector. Check 
Oxygen Sensor heating for continuity 

 

2003 Volkswagen New Beetle GLS 

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