wiring AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide A4 1998 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1077/w960_1077-0.png AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide

Page 38 of 59

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide 28-37
      
Test requirements: 
     
Fuses for engine electronics OK 
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations   
     
Battery voltage at least 12.7 V 
     G

Page 41 of 59

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide      
-  Check wire connections.
     
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations   
Pa
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11/21/2002 htt
p://127.0.0.1:8080/audi/s

Page 42 of 59

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide 28-39
      
-  Connect multimeter for voltage measurement as 
follows: 
     
VAG1598/31 test box  
Socket  
Measure to  
121
 1)
  
Engine Ground (GND)  
     
1) The motronic Engine Control Module

Page 46 of 59

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide 28-42
       Component location   Overview of component 
locations  Page 24
-5   
     
Note:  
     
Knock Sensor (KS) 1 -G61- and Knock Sensor 
(KS) 2 -G66- themselves cannot be electrically 
tested

Page 47 of 59

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide 28-43
 
    
Check wires from knock sensors to Engine Control Module (ECM).   -  Check all three terminals at knock sensor connector for short circuit to 
each other (terminal 1+2, 1+3, 2+3). 
 
Speci

Page 53 of 59

AUDI A4 1998 B5 / 1.G ATW Engine Ignition System User Guide 28-49
      
Checking Ground (GND) wire  
    
If all specified values are being reached and the LED does not blink 
(measured between terminal 1 and 2 with starter and connector 
connected):  
If spe
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