Air Bypass Valve: Testing and Inspection

Checking the charge air bypass valve, 4-cyl.





1. Disconnect the vacuum hose from the charge air bypass valve.
2. Connect the pressure/vacuum pump, 30 14 883 Pressure/vacuum pump, and build negative pressure in the valve.
3. Check that the diaphragm is intact. If the diaphragm is damaged, no vacuum can be created.





4. Repeat points 2 and 3 but pump up a pressure.
5. Disconnect the pump.
6. Connect the vacuum hose.