wiring AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual A4 1996 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1049/w960_1049-0.png AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual

Page 1 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-179
 
     
Additional signals, checking 
     
Engine speed (RPM) signal, checking 
 
     
Note:  
     The engine speed signal is taken from terminal 
37 on the Engine Control Module (ECM). The

Page 2 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-180
      
Fuel consumption signal for on-board 
computer, checking
 
     
Notes:  
     
The fuel consumption signal is calculated by the 
engine control module (on the basis of the 
injection pe

Page 3 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-181
      
Coolant temperature signal, checking
 
     
Notes:  
     
The engine control module receives the coolant 
temperature signal from the instrument cluster. 
When the signal is received,

Page 6 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-183
      
-  Take vehicle for a test drive and check whether 
vehicle speed appears in display field 3. 
     
-  If vehicle speed does not appear, raise the 
vehicle (preferably using a lift) unt

Page 7 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-184
      
Fuel tank level signal, checking
 
     
Note:  
     
The Engine Control Module (ECM) receives the 
fuel tank level signal from the instrument 
cluster. 
     The processed signal enter

Page 12 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-189
       If specifications are not met:  
     
Check voltage supply  
     
-  Connect VAG1527 B between following sockets 
on harness connector: 
     
Harness connector 
terminal  
Measure 
ag

Page 13 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual      
       Electrical Wiring Diagrams, Troubleshooting & 
Component Locations        
-  If necessary eliminate open circuit or short 
circuit to Ground (GND) 
Pa
ge 13 of 37 Additional si
gnals, ch

Page 14 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-190
       If LED comes on:  
     
Check activation  
     
-  Connect VAG1598/31 test box to wiring harness 
for engine control module. Do not connect to the 
engine control module itself   Page

Page 20 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-194
       If specification is obtained:  
     
Check voltage supply  
     
-  Connect VAG1527 B between following sockets 
on harness connector: 
     
Harness connector 
terminal  
Measure 
aga

Page 21 of 37

AUDI A4 1996 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-195
       If LED comes on:  
     
Check activation  
     
-  Connect VAG1598/31 test box to wiring harness 
for engine control module. Do not connect to the 
engine control module itself   Page
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