AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual A3 1996 8L / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1081/w960_1081-0.png AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual

Page 1 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-71
 
  
Oxygen sensor control, 
checking Oxygen sensor and oxygen sensor control 
before catalytic converter, checking
 
Special tools and equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
 VAS5051 with

Page 2 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-72
      
Test requirements: 
     
Exhaust system free of leaks. 
     Coolant Temperature at least 80 C. 
     
Test sequence  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select co

Page 3 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-73
 
  
Display fields  
  
1   2   3   4  
Display group 030: Oxygen sensor status  
Display  
X X X   X X X  
    
Indicated  
Oxygen sensor status, bank 1, sensor 1   Oxygen sensor status, bank

Page 4 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-74
      
-  Do not start test until indication in display field 1 
has reached "111" at least once. 
     
Checking oxygen sensor adaptation values 
and control  
     
- Press -C- button.Basic Se

Page 5 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-75
 
  
Display fields  
  
1   2   3   4  
Display group 036: Oxygen sensor adaptation values  
Display  
xx.x %  
xx.x %  
  
  
Indicated  
Oxygen sensor adaptation value Bank 1, 
sensor 1at idl

Page 6 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-76
 
  
Display fields  
  
1   2   3   4  
Display group 033: Oxygen sensor control  
Display  
xx.x %  
x.xxx V  
  
  
Indicated  
Oxygen sensor control Bank 1, sensor 1  
Oxygen sensor voltage,

Page 7 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-77
      
Continuation  
      If specified value in display field 1 is not obtained 
or if value does not fluctuate at least 2 %:  
     
-  Road test vehicle in order to free oxygen sensor 
of po

Page 8 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-78
 Display group 032  Display field: 1 / 2  
Possible cause  
Corrective action  
Oxygen sensor adaptation 
value in range: -10.0 to -25.0 
%  
Leak in intake area (pressure side between 
turbocha

Page 9 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-79
 Display group 032  Display field: 1 / 2  
Possible cause  
Corrective action  
Oxygen sensor adaptation 
value in range:10.0 to 25.0 %  
False air in intake area- Check intake system for leaks

Page 10 of 37

AUDI A3 1996 8L / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-80
 Evaluation display group 033  Display field: 
2  
Possible cause  
Corrective action  
constant about  
0.450 V   
Open circuit in wire 4 between oxygen sensor 
and control module - Check prima
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