Volkswagen New Beetle. Manual - part 1690

 

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Volkswagen New Beetle. Manual - part 1690

 

 

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

  

Sensor (HO2S) on and off).  

z

The numbers in the 3 figure number block can alternate from 0 and 1 in the display depending on the 
status of the oxygen sensor control.
  

z

The third position of the 3 digit number block will be set to 1 only at increased exhaust temperature and 
part load.
  

Significance of 3 digit number block in display zone 2 

Significance of 3 digit number block in display zone 2 SPECIFICATION 

If the specification is obtained: 

z

Change to display group 36 as follows:  

z

Press --> button.  

z

Press buttons -0- and -4- for "Basic Setting" function and confirm entry with -Q- button. 

Indicated on display 

Fig. 113: Identifying Scan Tool Display - Basic Setting 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Press buttons -0-, -3- and -6- for "Display group number 36" and confirm entry with -Q- button. 

Indicated on display (1 to 2 - Display zones)

Significance if display = 1
1

2

3

Significance

 

 

1

Oxygen sensor control active

 

1

 

Oxygen sensor operationally ready

1

 

 

Heated Oxygen Sensor (HO2S) on

 

2003 Volkswagen New Beetle GLS 

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

  

Fig. 114: Identifying Scan Tool Display - System In Basic Setting 36 
Courtesy of VOLKSWAGEN OF AMERICA, INC. 

z

Check oxygen sensor voltage after Three Way Catalytic Converter (TWC) in display zone 1. 

Specification: 0.100...0.900 V (can fluctuate slightly) 

z

Maintain engine speed at 1800 -2200 RPM. 

If the diagnostic is initiated from Engine Control Module the display in display zone 4 jumps from "Test 
OFF" to "Test ON." 

Specification: "B1-S2 OK." appears in display zone 2. 

DISPLAY GROUP 36: OXYGEN SENSOR CONTROL, OPERATIONAL READINESS AFTER 
THREE WAY CATALYTIC CONVERTER (TWC)
 

NOTE:

It can take a few minutes until display jumps from "Test ON" to "B1 -S2 
OK".

 

Display zones

1

2

3 4

Display group 36: Oxygen sensor control, operational readiness after Three Way Catalytic 
Converter (TWC)
Display 
Indicated

x.xxx V 

Oxygen sensor voltage for oxygen sensor 

after Three Way Catalytic Converter 

(TWC)

Test OFF/Test ON 

B1-S2 OK. 

B1-S2 n. OK. 

Diagnostic condition and Diagnostic 

result

-

Working 
range 

0.100 to 0.900 V (must fluctuate slightly)

B1-S2 OK. 

-

 

2003 Volkswagen New Beetle GLS 

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

  

If the specification is obtained: 

z

Press --> button.  

z

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

z

Switch off ignition. 

Continuation 

If the specification is not obtained: 

z

Press --> button.  

z

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

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

Perform a road test to remove possible contaminates on oxygen sensor and repeat check. 

Observe the valid safety precautions when carrying out a road test, see SAFETY PRECAUTIONS . 

If the specifications are again not obtained: 

z

Replace Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130-, see item 8 .  

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 .  

Evaluating display group 36, display zone 1 - oxygen sensor voltage oxygen sensor after Three Way 
Catalytic Converter (TWC)
 

EVALUATING DISPLAY GROUP 36, DISPLAY ZONE 1 - OXYGEN SENSOR VOLTAGE OXYGEN 
SENSOR AFTER THREE WAY CATALYTIC CONVERTER (TWC)
 

Specification

If specifications are not achieved, see 

POSSIBLE CAUSES OF 

MALFUNCTION IF SENSOR 

CONTROL FREQUENCY IS TOO 

SLOW: , Evaluating display group 36

If specifications are not achieved, see 

POSSIBLE CAUSES OF 

MALFUNCTION IF SENSOR 

CONTROL FREQUENCY IS TOO 

SLOW: , Continuation

Appears on 
display

Possible cause

Corrective action

Constant 1.105 
V

z

Short to positive via: oxygen sensor, 

sensor wiring, Ground (GND) wiring, 

z

Check oxygen sensor basic voltage, 

see CHECKING BASIC 

 

2003 Volkswagen New Beetle GLS 

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

  

 

 

 

 

 

 

 

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