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Home >> Mazda >> 1983 >> 626 Base, 4D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing >> Component Testing >> Vacuum Sensor

Vacuum Sensor

  1. The vacuum sensor is located on the left hand side of the firewall. Start the engine and run at idle. Connect a voltmeter to the sensor Blue wire terminal.
  2. Voltmeter should read approximately 1V. Disconnect the vacuum sensing tube from the sensor. The reading should then change to 4V. See Fig 1 .
Fig 1: Testing Vacuum Sensor Engine should be at operating temperature and idling.
G41331
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