1995 AUDI A4 AUX

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Page 9 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual   
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Page 10 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-93
       If X1X_XX is displayed:  
     
-  Briefly press accelerator pedal to apply wide 
open throttle. 
     
Display must switch briefly to X0X_XX, then 
X1X_XX must appear again after several

Page 11 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual      
- Replace ECM   page 01
-265
 .
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Page 12 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-94
      
Engine speed (RPM) signal, checking 
 
     
Notes:  
     The RPM signal is routed from the ECM to 
various electronic systems (e.g. automatic 
transmission, ABS, etc.). The RPM signal i

Page 13 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual tester:  
     
-  Check wiring between ECM terminal C10 and 
instrument cluster or A/C control module using 
wiring diagram. 
      If wiring is OK:  
     
- Replace ECM   page 01
-265
 .
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Page 14 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-95
      
Fuel consumption signal, checking
 
     
Notes:  
     
The consumption signal is internally calculated 
by the ECM using "injection time." 
     The consumption signal is routed to both

Page 15 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual Group 90; Instrument cluster, repairing
   
     
       Repair Manual, 5 Spd. Automatic 
Transmission 01V, Repair Group 01, On Board Diagnostic
   
     
-  Connect VAG 1598 test box to instrument 
c

Page 16 of 37

AUDI A4 1995 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-96
      
-  Switch Fluke 83 multimeter to voltage 
measurement range and connect between 
signal wire (trip computer 20-pin connector) and 
Ground (GND), using wiring diagram. 
     
-  Start engi