The active inlet valve needs to be serviced in cases where the pressure ripple is unstable and the leak test verifies problems with the active inlet valve due to internal leaking. The active inlet valve contains a cartridge that is exchanged. 1. Remove the AIV using a 14 mm wrench.
2. Change the cartridge .
3. Reinstall the AIV.
PS: Properly position the AIV cable when you reinstall the valve.
