heating AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide

AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide A4 1997 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1094/w960_1094-0.png AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide

Page 39 of 46

AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide 24-107
 
  
Oxygen sensor heating, Oxygen Sensor 
(O2S) Heater 1 -Z29- after catalytic 
converter, checking
 
Special Tools and Equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
Pa
ge 39 of 46 Ox
yg
en sen

Page 40 of 46

AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide 24-108
      
Test requirements:  
     
Coolant Temperature at least 80  C. 
     
Fuse for oxygen sensor heating OK 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations

Page 42 of 46

AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide 24-109
       If specified value is obtained:  
     
-  Check voltage supply of oxygen sensor 
heating. 
     
Checking voltage supply for oxygen sensor 
heating  
    
Note:  
When the Engine Contro

Page 44 of 46

AUDI A4 1997 B5 / 1.G AWM Engine Oxygen Sensor Control Checking User Guide 24-111
       If there is no voltage:  
     
-  Connect VAG1598/31 test box at wiring harness 
to Engine Control Module (ECM), do not connect 
ECM  Page 24
-19
 . 
    
If wire connection is OK, but
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