1999 AUDI A4 AFC Engine Auxiliary Input Signals Checking Workshop Manual

Page 25 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-101
      
Shift procedure, checking
 
     
Notes:  
     
The Engine Control Module (ECM) uses this 
signal to briefly retard the ignition during shifting 
to reduce the mechanical jerking felt b

Page 26 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual -  Test drive and select "Read Measuring Value 
Block" function 08, display group 004   page 
01
-249
 . 
Pa
ge 26 of 37 Auxiliar
y in
put si
gnals, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/se

Page 27 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-102
 
Read measuring value block 4 1 2 3 4
    
Indicated on display; note display field 4  
Notes:  
Due to its short signal duration, shifting cannot always be observed on the 
VAG 1551 scan tool

Page 28 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-103
      
Upshift and downshift signals, checking 
 
     
Notes:  
     
The Engine Control Module (ECM) uses this 
signal in connection with the shift signal to 
determine whether the current si

Page 29 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-104
      
Throttle position sensor output signal, 
checking
 
     
Notes:  
     
The Transmission Control Module (TCM) 
interprets this information as a load signal. 
     This signal is monitor

Page 30 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-105
      
Malfunction Indicator Lamp (MIL) wire 
from Transmission Control Module 
(TCM), checking
 
     
Notes:  
     
If a malfunction is recognized by the Engine 
Control Module (ECM) or the

Page 31 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-106
      
-  Switch ignition ON.
     
-  Using VAG 1551 scan tool, select "Read 
Measuring Value Block" function 08, display 
group 027, display field 1   page 01
-249
 . 
Read measuring value bl

Page 32 of 37

AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-107
      
Fuel level signal (from instrument 
cluster), checking
 
     
Notes:  
     
If the fuel level in the tank is too low (less than 
3.2 gal); combustion misfire, oxygen sensor and 
fuel s
Page:   < prev 1-10 9-16 17-24 25-32 33-40 next >