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# VACUUM PUMP (for KD Series Engine) > ON-VEHICLE INSPECTION

## for Preparation Click here

1. CHECK VACUUM PUMP ASSEMBLY

1. Disconnect the vacuum hose from the vacuum pump.

1. Connect the hose of a vacuum gauge to the pump.

1. Insert a plug into the other hose of the gauge.

1. Start the engine and warm it up for more than 2 minutes.

1. With the engine idling, check the negative pressure of the pump.

   Standard:
     More than 86.7 kPa (650 mmHg, 26 in.Hg)

1. Remove the gauge from the pump.

1. Connect the hose to the pump with the clip.