check engine light AUDI A4 1999 B5 / 1.G AHA Engine Intake Manifold Tuning System Workshop Manual

AUDI A4 1999 B5 / 1.G AHA Engine Intake Manifold Tuning System Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1043/w960_1043-0.png AUDI A4 1999 B5 / 1.G AHA Engine Intake Manifold Tuning System Workshop Manual

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AUDI A4 1999 B5 / 1.G AHA Engine Intake Manifold Tuning System Workshop Manual 24-158
      
Checking voltage supply for intake manifold 
tuning valve -N156-  
     
Test requirements 
     
Fuse for for intake manifold tuning valve OK 
    
-  Disconnect harness connector from