Volkswagen New Beetle. Manual - part 1629

 

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Volkswagen New Beetle. Manual - part 1629

 

 

If no wiring malfunction is found: 

z

Replace Heated Oxygen Sensor (HO2S) before Three Way Catalytic Converter (TWC) -G39-, see item 
10 .  

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 .  

Oxygen sensor and oxygen sensor control after Three Way Catalytic Converter (TWC), checking 

Special tools, test equipment and auxiliary items 

z

VAG 1551 scan tool or VAG 1552 mobile scan tool with VAG 1551/3B cable  

z

VAG 1598/31 test box  

z

VAG 1526 A or Fluke 83 multimeter  

z

VAG 1594 adapter set  

z

Electrical Wiring Diagram  

Test conditions 

z

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

NOTE:

z

Raise vehicle to reach oxygen sensor connector.  

z

Only gold terminals may be used for servicing terminals 3 and 4 in 
connector for oxygen sensor.  

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 109: Locating Fuses 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Battery voltage must be at least 11.5 V.  

z

Exhaust system between Three Way Catalytic Converter (TWC) and cylinder head must be free of leaks  

z

Engine Coolant Temperature (ECT) must be at least 80 °C display group 04, display zone 3  

Functional check 

z

Connect VAG 1551 scan tool ((VAG 1552). Start engine and select "Address word" 01 of ECM. Engine 
must be running at idle speed. Connecting scan tool and selecting Engine Control Module, see VAG 
1551, CONNECTING AND SELECTING MOTRONIC ENGINE CONTROL MODULE (ECM) -
J220-
 . 

 

2003 Volkswagen New Beetle GLS 

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

  

Indicated on display 

Fig. 110: Identifying Scan Tool Display - Checking HO2S After TWC (1 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

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

Indicated on display 

Fig. 111: Identifying Scan Tool Display - Checking HO2S After TWC (2 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press buttons -0-, -3- and -0- for "Display group number 30" and confirm entry with -Q- button. 

Indicated on display (1 to 2 - Display zones)

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 112: Identifying Scan Tool Display - Checking HO2S After TWC (3 Of 3) 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check status of oxygen sensor control after Three Way Catalytic Converter (TWC) (display zone 2). 

Specification: 1 1 0 

DISPLAY GROUP 30: OXYGEN SENSOR CONTROL 

Notes on display zone 2: 

z

The first figure in the 3 figure number block periodically changes between 0 and 1 (Heated Oxygen 

 

Display zones

1

2

3 4

Display group 30: Oxygen sensor control
Display

xxx

xxx

- -

Indicated

Status of oxygen sensor 

control before Three Way 

Catalytic Converter 

(TWC)

Status of oxygen sensor control after Three Way Catalytic 

Converter (TWC)

- -

Working 
range

-

-

- -

Specification

111

110

- -

 

-

Significance, see POSSIBLE CAUSES OF 

MALFUNCTION IF SENSOR CONTROL 

FREQUENCY IS TOO SLOW:

- -

 

-

If the specification is not obtained, see HEATED 

OXYGEN SENSOR (HO2S) FOR OXYGEN SENSOR 

AFTER THREE WAY CATALYTIC CONVERTER 

(TWC), CHECKING

- -

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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