airbag AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual

AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual A4 2000 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1049/w960_1049-0.png AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual

Page 4 of 37

AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-182
      
Vehicle Speed Signal (VSS), checking
 
     
Notes:  
     
The vehicle speed signal is generated by the 
Vehicle Speed Sensor (VSS) -G68 (on the 
transmission) and is processed in the

Page 5 of 37

AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual always be fastened to and operated from the rear seat by a 
second technician. When driving or riding in an airbag equipped vehicle, NEVER hold 
the scan tool or other test equipment in your hands or

Page 22 of 37

AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-196
      
Crash signal, checking
 
      The Engine Control Module (ECM) receives the 
crash signal ("Crash shut-down activated") from 
the airbag control module.  
      If the airbag control mod

Page 23 of 37

AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-197
       Test the following wiring connections for open 
circuit and/or short to B+ or Ground (GND) and 
open circuit.  
     
VAG1598/31 test 
box, socket  
Airbag control module, 
contact  
67

Page 30 of 37

AUDI A4 2000 B5 / 1.G APB Engine Additional Signals Checking Workshop Manual 24-204
 
Read measuring value block 126  
1 
2 
3 
4
    
Note:  
Display group 126 indicates all other systems that communicate with the 
Engine Control Module (ECM) via the CAN-bus. If these systems