engine AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide A4 1997 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/965/w960_965-0.png AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide

Page 26 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-21
      
-  Initiate output Diagnostic Test Mode (DTM) and 
activate recirculating valve for turbocharger -
N249-. 
     
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Ignition,

Page 28 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-23
      
Checking voltage supply  
     
Note:  
     Voltage is supplied to the recirculation valve via 
the Fuel Pump (FP) relay. 
     
Test requirement: 
     
Fuse for recirculation valve OK

Page 29 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-24
       If LED does not light:  
     
-  Check wire connection from terminal 1 to Fuel 
Pump (FP) relay via fuse for open circuit. 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Co

Page 30 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-25
      
Checking activation  
    
 Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, 
Engine Code(s): APB, Repair Group 01
   
If LED does not blink or if it remains constantly l

Page 31 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-26
       If wire connection is OK:  
     
-  Replace Engine Control Module (ECM).
     
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Ignition, Engine Code(s): APB, Repair Group

Page 33 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-28
      
Note:  
     The charge air pressure sensor -G31- and wire 
connections are monitored by the Engine Control 
Module (ECM). 
     
-  Connect VAS 5051 tester or VAG 1551 scan 
tool and sel

Page 34 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-29
      
Checking voltage supply  
     
-  Switch ignition off.
    
-  Remove engine cover (arrows).
-  Disconnect connector at charge air pressure sensor.
    
If specified value is not obtaine

Page 35 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-30
      
-  Connect VAG 1598/31 test box to wiring 
harness for Engine Control Module (ECM), also 
connect ECM -1-. 
     
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Ignition,

Page 36 of 37

AUDI A4 1997 B5 / 1.G APB Engine Charge Air System With Turbocharger User Guide 21-31
      
Checking signal wire  
     
-  Disconnect harness connector at charge air 
pressure sensor. 
     
-  Connect multimeter to socket 101 and socket 
108 of test box for voltage measurement
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