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Vacuum Pump Test

WARNING: This page is about a different car, the 2001 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect vacuum hose from vacuum pump. Connect a vacuum gauge to vacuum pump. Disconnect vacuum pump connector.
  2. Using jumper wires, connect battery voltage to pump connector terminal No. 1 and connect terminals No. 2, 3 and 4 to ground. Connect another jumper between ground and terminal No. 2. Vacuum pump should start and vacuum gauge should read about 8.0 in. Hg (27 kPa) or more.
  3. Disconnect jumper wire from vacuum pump terminal No. 2, then terminal No. 3. Vacuum gauge should read zero in. Hg (zero kPa) or less when ground is removed from each terminal. If vacuum pump does not operate or vacuum readings are not as specified, replace vacuum pump.
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