Vacuum Pump: Testing and Inspection

1. Disconnect the vacuum hose from the electric vacuum pump and connect a vacuum gauge to the vacuum pump.
2. Disconnect the electric vacuum pump connector.




3. Connect terminal 1 to the battery (+) terminal, and connect terminals 2 and 3 to the battery (-) terminal.
4. Check to be sum that the vacuum gauge shows a reading of 53 kPa (15.7 in.Hg) or more when terminal 4 is connected to the battery (-) terminal.




5. In this condition, check to be sure that the vacuum gauge shows a 20 kPa (6 in.Hg) or less when terminals 2 and 3 are disconnected from the battery.