AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1031/w960_1031-0.png AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual

Page 1 of 6

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual 28-29
 
     
Knock sensors, checking 
     
Notes:  
     
To functionally check knock sensors   Repair 
Group 01, Read measuring value block, display 
group 015 and/or 016. 
     
Component location

Page 2 of 6

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual      
-  Disconnect knock sensor harness connectors in 
engine compartment. 
    
If there is a short circuit:  -  Check all three terminals in knock sensor harness connector for 
shorting to each oth

Page 3 of 6

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual 28-30
      
Checking wiring between knock sensor and 
ECM  
     
-  Connect VAG 1598/19 test box to ECM harness 
connector  page 01
-255
 . 
     
-  Check wiring for continuity or short between 
kn

Page 4 of 6

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual If specified values are not obtained, repair open or short circuit.  
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Page 5 of 6

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual 28-31
      
Knock Sensor (KS) 2 -G66- 
     
-  Check signal wire for continuity between 
harness connector terminal 2 (in engine 
compartment) and test box socket A15. 
     
  
Specified value: max

Page 6 of 6

AUDI A4 1999 B5 / 1.G AFC Engine Knock Sensors Checking Workshop Manual 28-32
 
    
Knock sensor 1 (bank 1): 
Knock sensor terminal 
number  ECM connector A or engine ground 
(GND)  
1 (Signal)  
2 (Ground)  
3 (shield)  A13  
A14  
Engine Ground (GND)  
Knock sensor 2 (