(3) Liquid Level Sensor (LLS)
In the normal mode the LLS sends the 'Tank Full' signal through the CAN Bus to the VGMC.
The VGMC then stops the operation of the related vacuum generator and the related waste vacuum subsystem becomes unserviceable. If there is a failure of a liquid level sensor, the hydrostatic APS gives the 100% level information to the VGMC.