coolant reservoir AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual

AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1081/w960_1081-0.png AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual

Page 10 of 37

AUDI A4 1999 B5 / 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

Page 11 of 37

AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-81
 
    
If specified value is not obtained:  
If specified value is obtained:  
Checking oxygen sensor wires   -  Connect multimeter between terminal 3 and 4 for voltage 
measurement. 
-  Switch

Page 26 of 37

AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-96
      
Checking primary voltage  
    
Note:  
Coolant reservoir screws must be removed and coolant reservoir must be 
placed to side in order to access the harness connector. The coolant 
hoses

Page 27 of 37

AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-97
      
Checking oxygen sensor wires  
    
Note:  
Coolant reservoir screws must be removed and coolant reservoir must be 
placed to side in order to access the harness connector. The coolant 
h

Page 30 of 37

AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-100
      
Test requirements: 
     
Coolant Temperature at least 80 C. 
     
Fuse for oxygen sensor heating OK 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations

Page 36 of 37

AUDI A4 1999 B5 / 1.G ATW Engine Oxygen Sensor Control Workshop Manual 24-105
      
Oxygen sensor, removing and installing
 
     
Special tools and equipment  
     
3337 wrench, 7-piece set 
     Locking compound G 052 112 A3
     
Procedure  
    
Note:  
Coolant res