ignition AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual

AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/937/w960_937-0.png AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual

Page 19 of 34

AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual 21-30
      
Checking power supply  
     
Note:  
     The power supply for the recirculating valve is via 
the fuel pump relay. 
     
Test requirements:  
     
Fuse for recirculating valve OK.

Page 22 of 34

AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual 21-32
       If the LED lamp does not flash or if it lights up 
continuously:  
     
-  Connect VAG 1598/31 test box to wiring 
harness leading to engine control module; 
engine control module should

Page 26 of 34

AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual 21-36
      
Checking power supply  
     
Test requirements:  
     
Fuse for wastegate bypass regulator valve 
OK 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations bin

Page 29 of 34

AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual 21-38
       If the LED lamp does not flash or if it lights up 
continuously:  
     
-  Connect VAG 1598/31 test box to wiring 
harness leading to engine control module; 
engine control module should

Page 32 of 34

AUDI A4 1999 B5 / 1.G AWM Engine Charge Pressure Leak Test Workshop Manual 21-41
 
    
If specified value is not attained:  -  Connect multimeter between contacts 1 and 3 of connector to measure 
voltage. 
-  Switch ignition on.
Specified value: approx. 5 V 
    
 Repair Ma