AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owner's Manual

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owner's Manual A4 2000 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/964/w960_964-0.png AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owner's Manual

Page 21 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-21
      
-  Road test vehicle. 
     
 
Wide Open Throttle (WOT) at engine 
speeds between 5000...6500 RPM must be 
reached. 
     
Note:  
     Exhaust gas temperature must rise to above 980
C so

Page 22 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-22
       If values above 20 % are displayed constantly, 
then  
     
fuel pressure may be too low,
     mass air flow sensor signal may be too small.
     
-  Select measuring value block 220.
Re

Page 23 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-23
      
-  Repeat test for bank 2  measuring value block 
221       If specified values are not obtained and there is a 
malfunction stored in the Diagnostic Trouble 
Code (DTC) memory:  
     
-

Page 24 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-24
 
  
Exhaust gas temperature sensor, 
checking
 
Special tools and equipment  
 
VAG 1526A
 VAG 1527B
 VAG 1594A
 VAG 1598/31
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Page 25 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-25
      
Checking voltage supply  
     
-  Switch ignition off.
    
-  Remove engine cover (arrows).
-  Disconnect connector at exhaust gas temperature sensor.
    
-  Connect VAG 1527B voltage

Page 26 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-26
       If LED does not light:  
     
-  Perform following tests marked with dots:
    
 Electrical Wiring Diagrams, Troubleshooting & Component Locations   
 Repair Manual, 2.7 Liter V6 5V BiTu

Page 27 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-27
 
    
If wire connection is OK:  
If the same malfunction occurs again after replacing the exhaust gas 
temperature sensor:  
 Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition,

Page 28 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-28
      
Exhaust gas temperature sensor, 
removing and installing
 
    
-  Remove bolts (arrows) and remove engine covers -A- and -B-.
    
-  Remove air distributor (arrows).
Pa
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Page 29 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-29
 
    
-  Disconnect both connectors -2- from control modules for exhaust gas 
temperature. 
-  Remove control module from intake manifold and set wires aside.
    
For vehicles with manual tran

Page 30 of 30

AUDI A4 2000 B5 / 1.G APB Engine Exhaust System Components Owners Manual 26-30
 
    
-  Remove exhaust gas temperature sensor from exhaust manifold.
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