Checking the charge air bypass valve, V6
| Checking the charge air bypass valve, V6 | 
| 1. | 
        Disconnect the vacuum hose from the charge air bypass valve.
         
        
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| 2. | 
        Connect the pressure/vacuum pump,
        
         30 14 883 Pressure/vacuum pump
        
        , and build negative pressure in the valve.
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| 3. | 
        Check that the diaphragm is intact. If the diaphragm is damaged, no vacuum can be created.
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| 4. | 
        Repeat points 2 and 3 but pump up a pressure.
         
        
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| 5. | 
        Disconnect the pump.
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| 6. | 
        Connect the vacuum hose.
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