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, the charge 
pressure is reduced to prevent the engine from 
overheating. 
    
 Electrical Wiring Diagrams, Troubleshooting & Component Locations    -  Connect VAG1598/31 test box to wiring harness for engine control 
module. Do not connect to the engine control module itself   Page 24
-
20
 . 
-  Check wiring from test box socket 19 to instrument cluster according to 
wiring diagram for an open circuit. 
Pa
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11/22/2002 htt
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pair&id=AUDI.B5.FU04.24.6