Vacuum Pump: Description and Operation

ASCD PUMP OPERATION
The ASCD pump consists of a vacuum motor, an air valve and a release valve. When the ASCD activates, power is supplied:
- from ASCD control unit terminal (12)
- to ASCD pump terminal (1).
Ground is supplied to vacuum motor, air valve and release valve from ASCD control unit depending on the operated condition as shown in the below table.
The pump is connected to ASCD actuator by vacuum hose. When the ASCD pump is activated, the ASCD pumps vacuum to the diaphragm of ASCD actuator to control throttle cable.