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Home >> Mazda >> 1985 >> 626 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing >> Component Testing >> Vacuum Sensor

Vacuum Sensor

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  1. Start engine and run at idle. Connect 1 voltmeter lead to Blue wire terminal of sensor connector and other lead to ground.
  2. Voltmeter should read approximately 1 volt. Disconnect vacuum hose from sensor. Reading should change to 4 volts. See Fig 1 .
Fig 1: Testing Vacuum Sensor Engine should be idling at operating temperature.
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