AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking https://www.carmanualsonline.info/img/6/1067/w960_1067-0.png AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking

Page 1 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-76
 
     
Oxygen sensor control, 
checking 
     
Oxygen sensor control, function
 
     
Notes:  
     The oxygen sensors compare the oxygen 
content of the air with residual oxygen content in 
e

Page 2 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-77
      If voltage change does not occur or occurs only 
slowly, the following malfunctions could be 
present: 
     
Slits or holes in sensor head clogged.
     Sensors suffered thermal overload.

Page 3 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-78
 
  
Oxygen sensors and oxygen sensor 
control before catalytic converter, 
checking
 
Special Tools and Equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
 VAS5051 with VAG5051/1
- or 
 VAG1551 with

Page 4 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-79
      
Notes:  
     
For the defined troubleshooting procedure, it is 
possible, to switch oxygen sensor control off by 
selecting display group 099 under "basic 
setting" and switch it on agai

Page 5 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-80
      
Function test  
     
-  Connect VAS5051 tester or VAG1551 scan tool 
and select the control module for engine 
electronics using "address word" 01   Page 01
-
9 . 
     
   Engine must r

Page 6 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking "Oxygen sensor status" indicates status of oxygen sensor control and 
oxygen sensors. 
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yg
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=G

Page 7 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-81
 
  
Display fields  
  
1   2   3   4  
Display group 030: Oxygen sensor status with engine at idle  
Display  
X X X   X X X  
X X X   X X X  
Indicated  
Oxygen sensor status, 
bank 1, sensor

Page 8 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-82
 Significance of 3 digit indication of display group 030  X  
X  
X  
Display fields 1 to 4  
      X   Oxygen sensor control  
0= not active  
1 = active  
   X      Operational readiness of ox

Page 9 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-83
      
Checking oxygen sensor adaptation values 
and control  
     
- Press -C- button.Basic Setting 
Q
Input displa
y group number XXX
    
When indicated on display:  
-  Press buttons -0-, -

Page 10 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-84
 
   1   2   3   4  
Display group 033: Oxygen sensor control before catalytic converter  
Display  
xx.x %  x.xxx volts  
xx.x %   x.xxx V  
Indicated  
Oxygen sensor control
Bank1  Oxygen sens
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