sensor AUDI A6 1999 C5 / 2.G AHA Engine Auxiliary Signals Checking Workshop Manual
Page 8 of 22
24-168
      
Vehicle speed signal, checking
 
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     Multimeter US1119 (Fluke 83 or equivalent) 
     VW1594 connector test kit 
     Wiring diagrams 
     
Test conditions  
     Vehicle Speed Sensor (VSS) OK; checking: 
     
       Repair Manual, Electrical Equipment, Repair 
Group 90
   
     
Notes:  
     
To check Vehicle Speed Sensor -G68-, the 
vehicle must be driven. A second technician is 
required to operate the scan tool during the 
road test. 
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Page 9 of 22
     
Read safety precautions for test driving vehicles 
while using test equipment   page 24
-9 . 
     
The speed signal is generated by the vehicle 
speed sensor (at the transmission), and 
processed at the speedometer/odometer in the 
instrument cluster. 
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